certstmt_10dccmt21bb312610.htm - Generated by SEC Publisher for SEC Filing

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

STATEMENT TO NOTEHOLDERS

October 19, 2026


TRANSACTION PARTIES


Depositor:	Citigroup Commercial Mortgage Securities Inc.
Master Servicer:	Midland Loan Services, a Division of PNC Bank N.A.
Special Servicer:	Rialto Capital Advisors, LLC
Asset Representations Reviewer /
	Pentalpha Surveillance LLC.
Operating Advisor:
Trustee:	Wilmington Trust, National Association
Certificate Administrator:	Citibank, N.A.




	Danny Lee	Citibank, Agency and Trust
	(212) 816-4936	388 Greenwich Street Trading, 4th Floor
danny1.lee@citi.com		New York, NY 10013


TABLE OF CONTENTS


1.	Distribution Summary	2
1.1.	Summary	2
1.2.	Factors	3
2.	Distribution Detail	4
2.1.	Interest Detail	4
2.2.	Interest Shortfall Detail	5
2.3.	Principal Detail	6
3.	Reconciliation Detail	7
4.	Other Information	8
5.	Stratification Detail	9
6.	Mortgage Loan Detail	14
7.	NOI Detail	16
8.	Delinquency Loan Detail	18
9.	Collateral Performance Delinquency and Loan Status Detail	19
10.	Appraisal Reduction Detail	20
11.	Historical Appraisal Reduction Detail	21
12.	Loan Modification Detail	22
13.	Historical Loan Modification Detail	23
14.	Specially Serviced Loan Detail	24
15.	Historical Specially Serviced Loan Detail	25
16.	Unscheduled Principal Detail	27
17.	Historical Unscheduled Principal Detail	28
18.	Liquidated Loan Detail	29
19.	Historical Liquidated Loan Detail	30
20.	CREFC Investor Reporting Package Legends	31
21.	Notes	32


Reports Available at sf.citidirect.com	v. 21.09.28	Page 1 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

DISTRIBUTION SUMMARY

October 19, 2026


										Accretion
										&
										Non-Cash
				Accrual		Other				Balance
	Original	Prior	Pass-Through	Day	Interest	(As Interest)	Principal	Total	Realized Loss	Increase/	Current
Class	Balance	Balance	Rate	Count	Distributed	Distributed	Distributed	Distributed	/(Recovery)	(Decrease)	Balance

A-1	19,800,000.00	790,679.48	1.357000%	30/360	894.13	-	403,916.33	404,810.46	-	-	386,763.15
A-2	138,050,000.00	138,050,000.00	2.588000%	30/360	297,727.83	-	-	297,727.83	-	-	138,050,000.00
A-3	23,220,000.00	23,220,000.00	2.703000%	30/360	52,303.05	-	-	52,303.05	-	-	23,220,000.00
A-4	215,000,000.00	215,000,000.00	2.420000%	30/360	433,583.33	-	-	433,583.33	-	-	215,000,000.00
A-5	575,676,000.00	575,676,000.00	2.669000%	30/360	1,280,399.37	-	-	1,280,399.37	-	-	575,676,000.00
A-AB	23,526,000.00	23,526,000.00	2.615000%	30/360	51,267.07	-	-	51,267.07	-	-	23,526,000.00
A-S	142,182,000.00	142,182,000.00	2.892000%	30/360	342,658.62	-	-	342,658.62	-	-	142,182,000.00
B	63,981,000.00	63,981,000.00	2.748000%	30/360	146,516.49	-	-	146,516.49	-	-	63,981,000.00
C	60,428,000.00	60,428,000.00	3.195000%	30/360	160,889.55	-	-	160,889.55	-	-	60,428,000.00
D	37,322,000.00	37,322,000.00	2.250000%	30/360	69,978.75	-	-	69,978.75	-	-	37,322,000.00
E	26,659,000.00	26,659,000.00	2.250000%	30/360	49,985.62	-	-	49,985.62	-	-	26,659,000.00
F	26,660,000.00	26,660,000.00	2.250000%	30/360	49,987.50	-	-	49,987.50	-	-	26,660,000.00
G	14,218,000.00	14,218,000.00	2.250000%	30/360	26,658.75	-	-	26,658.75	-	-	14,218,000.00
H	55,095,655.00	55,095,655.00	2.250000%	30/360	79,471.90	-	-	79,471.90	-	-	55,095,655.00
R	-	-	0.000000%	30/360	-	-	-	-	-	-	-
S	-	-	0.000000%	30/360	-	-	-	-	-	-	-
VRR Interest	74,832,509.00	73,832,018.40	0.000000%	30/360	207,537.75	-	21,258.75	228,796.50	-	-	73,810,759.65
Total	1,496,650,164	1,476,640,353			3,249,859.71	-	425,175.08	3,675,034.79	-	-	1,476,215,178
Notional
X-A	1,137,454,000	1,118,444,679	0.755393%	30/360	704,054.57	-	-	704,054.57	-	(403,916.33)	1,118,040,763
X-B	124,409,000.00	124,409,000.00	0.428404%	30/360	44,414.43	-	-	44,414.43	-	-	124,409,000.00
X-D	63,981,000.00	63,981,000.00	1.143521%	30/360	60,969.68	-	-	60,969.68	-	-	63,981,000.00
X-F	26,660,000.00	26,660,000.00	1.143521%	30/360	25,405.23	-	-	25,405.23	-	-	26,660,000.00
X-G	14,218,000.00	14,218,000.00	1.143521%	30/360	13,548.82	-	-	13,548.82	-	-	14,218,000.00
X-H	55,095,655.00	55,095,655.00	1.143521%	30/360	52,502.54	-	-	52,502.54	-	-	55,095,655.00
Total	1,421,817,655	1,402,808,334			900,895.27	-	-	900,895.27	-	(403,916.33)	1,402,404,418

Grand Total	2,918,467,819	2,879,448,687			4,150,754.98	-	425,175.08	4,575,930.06	-	(403,916.33)	2,878,619,596


Reports Available at sf.citidirect.com	v. 21.09.28	Page 2 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

DISTRIBUTION SUMMARY - FACTORS

October 19, 2026


								Accretion
								&
								Non-Cash
				Other				Balance
		Record	Interest	(As Interest)	Principal	Total	Realized Loss	Increase/	Current
Class	CUSIP	Date	Distributed	Distributed	Distributed	Distributed	/(Recovery)	(Decrease)	Balance

A-1	08163MAA5	09/30/2026	0.04515808	-	20.39981465	20.44497273	-	-	19.53349242
A-2	08163MAB3	09/30/2026	2.15666664	-	-	2.15666664	-	-	1,000.00000000
A-3	08163MAC1	09/30/2026	2.25250000	-	-	2.25250000	-	-	1,000.00000000
A-4	08163MAD9	09/30/2026	2.01666665	-	-	2.01666665	-	-	1,000.00000000
A-5	08163MAE7	09/30/2026	2.22416667	-	-	2.22416667	-	-	1,000.00000000
A-AB	08163MAF4	09/30/2026	2.17916645	-	-	2.17916645	-	-	1,000.00000000
A-S	08163MAH0	09/30/2026	2.41000000	-	-	2.41000000	-	-	1,000.00000000
B	08163MAJ6	09/30/2026	2.29000000	-	-	2.29000000	-	-	1,000.00000000
C	08163MAK3	09/30/2026	2.66250000	-	-	2.66250000	-	-	1,000.00000000
D	08163MAW7 U0744XAF2	09/30/2026	1.87500000	-	-	1.87500000	-	-	1,000.00000000
E	08163MAY3 U0744XAG0	09/30/2026	1.87499981	-	-	1.87499981	-	-	1,000.00000000
F	08163MBA4 U0744XAH8	09/30/2026	1.87500000	-	-	1.87500000	-	-	1,000.00000000
G	08163MBC0 U0744XAJ4	09/30/2026	1.87500000	-	-	1.87500000	-	-	1,000.00000000
H	08163MBE6 U0744XAK1	09/30/2026	1.44243498	-	-	1.44243498	-	-	1,000.00000000
R	08163MBJ5	09/30/2026	-	-	-	-	-	-	-
S	00163MBH9	09/30/2026	-	-	-	-	-	-	-
VRR Interest	08163MBM8	09/30/2026	2.77336351	-	0.28408442	3.05744793	-	-	986.34618345
X-A	08163MAG2	09/30/2026	0.61897410	-	-	0.61897410	-	-	982.93272796
X-B	08163MAL1 U0744XAA3	09/30/2026	0.35700335	-	-	0.35700335	-	-	1,000.00000000
X-D	08163MAN7 U0744XAB1	09/30/2026	0.95293415	-	-	0.95293415	-	-	1,000.00000000
X-F	08163MAQ0 U0744XAC9	09/30/2026	0.95293436	-	-	0.95293436	-	-	1,000.00000000
X-G	08163MAS6 U0744XAD7	09/30/2026	0.95293431	-	-	0.95293431	-	-	1,000.00000000
X-H	08163MAU1 U0744XAE5	09/30/2026	0.95293431	-	-	0.95293431	-	-	1,000.00000000


Reports Available at sf.citidirect.com	v. 21.09.28	Page 3 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

DISTRIBUTION INFORMATION - INTEREST DETAIL

October 19, 2026


		Rate			Interest			Shortfall				Paid
												Cap
				Accrual	Net	Accreted	Non	Carry	Cap Carryover			Carryover
Class	Uncapped Capped		Next	Dates	Accrued	/Deferred	Recovered	Forward	/Basis Risk	Accrued	Carry Forward /Basis Risk		Total

A-1	1.35700%	1.35700%	1.35700%	09/01-09/30	894.13	-	-	-	-	894.13	-	-	894.13
A-2	2.58800%	2.58800%	2.58800%	09/01-09/30	297,727.83	-	-	-	-	297,727.83	-	-	297,727.83
A-3	2.70300%	2.70300%	2.70300%	09/01-09/30	52,303.05	-	-	-	-	52,303.05	-	-	52,303.05
A-4	2.42000%	2.42000%	2.42000%	09/01-09/30	433,583.33	-	-	-	-	433,583.33	-	-	433,583.33
A-5	2.66900%	2.66900%	2.66900%	09/01-09/30	1,280,399.37	-	-	-	-	1,280,399.37	-	-	1,280,399.37
A-AB	2.61500%	2.61500%	2.61500%	09/01-09/30	51,267.07	-	-	-	-	51,267.07	-	-	51,267.07
A-S	2.89200%	2.89200%	2.89200%	09/01-09/30	342,658.62	-	-	-	-	342,658.62	-	-	342,658.62
B	2.74800%	2.74800%	2.74800%	09/01-09/30	146,516.49	-	-	-	-	146,516.49	-	-	146,516.49
C	3.19500%	3.19500%	3.19500%	09/01-09/30	160,889.55	-	-	-	-	160,889.55	-	-	160,889.55
D	2.25000%	2.25000%	2.25000%	09/01-09/30	69,978.75	-	-	-	-	69,978.75	-	-	69,978.75
E	2.25000%	2.25000%	2.25000%	09/01-09/30	49,985.62	-	-	-	-	49,985.62	-	-	49,985.62
F	2.25000%	2.25000%	2.25000%	09/01-09/30	49,987.50	-	-	-	-	49,987.50	-	-	49,987.50
G	2.25000%	2.25000%	2.25000%	09/01-09/30	26,658.75	-	-	-	-	26,658.75	-	-	26,658.75
H	2.25000%	2.25000%	2.25000%	09/01-09/30	103,304.35	-	-	25,359.14	-	79,471.90	-	-	79,471.90
R	0.00000%	0.00000%	0.00000%	09/01-09/30	-	-	-	-	-	-	-	-	-
S	0.00000%	0.00000%	0.00000%	09/01-09/30	-	-	-	-	-	-	-	-	-
VRR Interest	0.00000%	0.00000%	0.00000%	09/01-09/30	207,537.75	-	-	-	-	207,537.75	-	-	207,537.75
Total					3,273,692.16	-	-	25,359.14	-	3,249,859.71	-	-	3,249,859.71
Notional
X-A	0.77577%	0.75539%	0.75539%	09/01-09/30	704,054.57	-	-	-	-	704,054.57	-	-	704,054.57
X-B	0.42737%	0.42840%	0.42840%	09/01-09/30	44,414.43	-	-	-	-	44,414.43	-	-	44,414.43
X-D	1.14249%	1.14352%	1.14352%	09/01-09/30	60,969.68	-	-	-	-	60,969.68	-	-	60,969.68
X-F	1.14249%	1.14352%	1.14352%	09/01-09/30	25,405.23	-	-	-	-	25,405.23	-	-	25,405.23
X-G	1.14249%	1.14352%	1.14352%	09/01-09/30	13,548.82	-	-	-	-	13,548.82	-	-	13,548.82
X-H	1.14249%	1.14352%	1.14352%	09/01-09/30	52,502.54	-	-	-	-	52,502.54	-	-	52,502.54
Total					900,895.27	-	-	-	-	900,895.27	-	-	900,895.27

Grand Total					4,174,587.43	-	-	25,359.14	-	4,150,754.98	-	-	4,150,754.98


Reports Available at sf.citidirect.com	v. 21.09.28	Page 4 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL

October 19, 2026


											Cap Carryover /
	Non-Recov Shortfall				Carry Forward Interest					Basis Risk Shortfall
			Other
Class	PPIS	SSRA	Shortfall	Prior	Int. on Prior	New	Paid	Outstanding	Prior	Int. on Prior	New	Paid	Outstanding

A-1	-	-	-	-	-	-	-	-	-	-	-	-	-
A-2	-	-	-	-	-	-	-	-	-	-	-	-	-
A-3	-	-	-	-	-	-	-	-	-	-	-	-	-
A-4	-	-	-	-	-	-	-	-	-	-	-	-	-
A-5	-	-	-	-	-	-	-	-	-	-	-	-	-
A-AB	-	-	-	-	-	-	-	-	-	-	-	-	-
A-S	-	-	-	-	-	-	-	-	-	-	-	-	-
B	-	-	-	-	-	-	-	-	-	-	-	-	-
C	-	-	-	-	-	-	-	-	-	-	-	-	-
D	-	-	-	-	-	-	-	-	-	-	-	-	-
E	-	-	-	-	-	-	-	-	-	-	-	-	-
F	-	-	-	-	-	-	-	-	-	-	-	-	-
G	-	-	-	-	-	-	-	-	-	-	-	-	-
H	-	-	-	814,235.55	1,526.69	23,832.45	-	839,594.69	-	-	-	-	-
R	-	-	-	-	-	-	-	-	-	-	-	-	-
S	-	-	-	-	-	-	-	-	-	-	-	-	-
VRR Interest	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	814,235.55	1,526.69	23,832.45	-	839,594.69	-	-	-	-	-
Notional
X-A	-	-	-	-	-	-	-	-	-	-	-	-	-
X-B	-	-	-	-	-	-	-	-	-	-	-	-	-
X-D	-	-	-	-	-	-	-	-	-	-	-	-	-
X-F	-	-	-	-	-	-	-	-	-	-	-	-	-
X-G	-	-	-	-	-	-	-	-	-	-	-	-	-
X-H	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	-	-	-	-	-	-	-	-	-	-

Grand Total	-	-	-	814,235.55	1,526.69	23,832.45	-	839,594.69	-	-	-	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 5 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

DISTRIBUTION INFORMATION - PRINCIPAL DETAIL

October 19, 2026


					Accretion
					&
					Non-Cash
					Balance		Cumulative
	Prior	Principal	Accreted	Realized Loss	Increase/	Current	Realized	Class %	Class %	Sub %	Sub %
Class	Balance	Distributed	Principal	/(Recovery)	(Decrease)	Balance	Loss	Original	Current	Original	Current

A-1	790,679.48	403,916.33	-	-	-	386,763.15	-	1.32%	0.03%	30.00%	30.42%
A-2	138,050,000.00	-	-	-	-	138,050,000.00	-	9.22%	9.35%	30.00%	30.42%
A-3	23,220,000.00	-	-	-	-	23,220,000.00	-	1.55%	1.57%	30.00%	30.42%
A-4	215,000,000.00	-	-	-	-	215,000,000.00	-	14.37%	14.56%	30.00%	30.42%
A-5	575,676,000.00	-	-	-	-	575,676,000.00	-	38.46%	39.00%	30.00%	30.42%
A-AB	23,526,000.00	-	-	-	-	23,526,000.00	-	1.57%	1.59%	30.00%	30.42%
A-S	142,182,000.00	-	-	-	-	142,182,000.00	-	9.50%	9.63%	20.00%	20.28%
B	63,981,000.00	-	-	-	-	63,981,000.00	-	4.27%	4.33%	15.50%	15.71%
C	60,428,000.00	-	-	-	-	60,428,000.00	-	4.04%	4.09%	11.25%	11.41%
D	37,322,000.00	-	-	-	-	37,322,000.00	-	2.49%	2.53%	8.63%	8.74%
E	26,659,000.00	-	-	-	-	26,659,000.00	-	1.78%	1.81%	6.75%	6.84%
F	26,660,000.00	-	-	-	-	26,660,000.00	-	1.78%	1.81%	4.88%	4.94%
G	14,218,000.00	-	-	-	-	14,218,000.00	-	0.95%	0.96%	3.88%	3.93%
H	55,095,655.00	-	-	-	-	55,095,655.00	-	3.68%	3.73%	0.00%	0.00%
R	-	-	-	-	-	-	-	0.00%	0.00%	0.00%	0.00%
S	-	-	-	-	-	-	-	0.00%	0.00%	0.00%	0.00%
VRR Interest	73,832,018.40	21,258.75	-	-	-	73,810,759.65	-	5.00%	5.00%	0.00%	0.00%

Total	1,476,640,353	425,175.08	-	-	-	1,476,215,178	-	99.98%	100.00%


Reports Available at sf.citidirect.com	v. 21.09.28	Page 6 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

RECONCILIATION DETAIL

October 19, 2026


SOURCE OF FUNDS			ALLOCATION OF FUNDS

Interest Funds Available			Scheduled Fees
Scheduled Interest	4,191,297.89		Servicing Fee	6,251.54
Prepayment Interest Shortfall	-		Trustee/Certificate Administrator Fee	7,260.21
Interest Adjustments	-		Operating Advisor Fee	1,021.40
ASER Amount	(8,070.97)		Asset Representations Reviewer Ongoing Fee	307.63
Realized Loss in Excess of Principal Balance	-		CREFC Intellectual Property Royalty License Fee	615.32
Total Interest Funds Available		4,183,226.92	Total Scheduled Fees		15,456.10
Principal Funds Available			Additional Fees, Expenses, etc.
Scheduled Principal	425,175.08		Additional Servicing Fee	-
Unscheduled Principal Collections	-		Special Servicing Fee	13,854.17
Net Liquidation Proceeds	-		Work-out Fee	2,702.55
Repurchased Principal	-		Liquidation Fee	-
Substitution Principal	-		Trust Fund Expenses	-
Other Principal	-		Trust Advisor Expenses	-
			Reimbursement of Interest on Advances to the Servicer	459.12
Total Principal Funds Available		425,175.08
			Borrower Reimbursable Trust Fund Expenses	-
Other Funds Available
			Other Expenses	-
Yield Maintenance Charges	-
Withdrawal of Withheld Amounts from the Interest Reserve			Total Additional Fees, Expenses, etc.		17,015.84
Account	-
			Distributions
Deposit of Withheld Amounts to the Interest Reserve Account	-
			Interest Distribution	4,150,754.98
Total Other Funds Available		-	Principal Distribution	425,175.08
			Yield Maintenance Charge Distribution	-
			Total Distributions		4,575,930.06




Total Funds Available		4,608,402.00
			Total Funds Allocated		4,608,402.00


Reports Available at sf.citidirect.com	v. 21.09.28	Page 7 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

OTHER INFORMATION

Interest Reserve Account Information

October 19, 2026


Beginning Interest Reserve Account Balance	0.00
Deposit of Withheld Amounts to the Interest Reserve Account	0.00
Withdrawal of Withheld Amounts from the Interest Reserve Account	0.00
Ending Interest Reserve Account Balance	0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding	98.634618%
Controlling Class Information
Controlling Class is Class H.
The Controlling Class Representative is RREF IV Debt AIV, LP.
There Are No Disclosable Special Servicer Fees.


Reports Available at sf.citidirect.com	v. 21.09.28	Page 8 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

STRATIFICATION DETAIL

October 19, 2026


Anticipated Remaining Term

Anticipated Remaining	Asset	Ending Scheduled	% of			Wtd Avg
Term Range	Count	Balance	Agg.Bal. WAC		WAM	DSCR

60 Months or Less	12	368,759,901.40	24.98	3.2428	34	2.551158
61 to 90 Months	50	1,107,455,276.40	75.02	3.4605	61	2.697842
91 Months or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200

Debt Service Coverage Ratio

Debt Service Coverage	Asset	Ending Scheduled	% of			Wtd Avg
Ratio Range	Count	Balance	Agg.Bal. WAC		WAM	DSCR

1.250 or Less	6	121,163,484.23	8.21	2.8897	60	0.651439
1.251 to 1.500	2	61,613,642.39	4.17	3.8756	56	1.474361
1.501 to 1.750	3	92,595,858.98	6.27	3.6449	35	1.601274
1.751 to 2.000	6	68,600,367.30	4.65	3.8072	61	1.906600
2.001 to 2.250	7	132,080,000.00	8.95	3.9249	61	2.170285
2.251 to 2.500	9	190,510,000.00	12.91	3.7251	61	2.423364
2.501 to 2.750	10	215,238,460.64	14.58	3.5108	50	2.626040
2.751 to 3.000	2	57,600,000.00	3.90	3.6774	61	2.922778
3.001 to 3.250	3	88,011,711.00	5.96	3.3602	61	3.132489
3.251 to 3.500	7	252,876,653.26	17.13	2.8921	60	3.426703
3.501 to 3.750	1	75,000,000.00	5.08	2.8380	1	3.660000
3.751 to 4.000	2	37,000,000.00	2.51	3.1149	60	3.932162
4.001 or Greater	4	83,925,000.00	5.69	3.4533	61	5.189702
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200


Reports Available at sf.citidirect.com	v. 21.09.28	Page 9 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

STRATIFICATION DETAIL

October 19, 2026


Ending Schedule Balance

Ending Schedule Balance	Asset	Ending Scheduled	% of			Wtd Avg
Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

1 to 5,000,000	5	15,761,224.43	1.07	3.6440	61	2.411453
10,000,001 to 15,000,000	4	50,828,460.64	3.44	3.5102	60	3.194252
15,000,001 to 20,000,000	12	212,539,128.36	14.40	3.9457	58	2.700855
20,000,001 to 25,000,000	5	112,279,591.86	7.61	3.2379	61	2.781415
25,000,001 to 30,000,000	3	86,885,836.97	5.89	2.7216	60	2.754373
30,000,001 to 35,000,000	3	98,051,907.15	6.64	3.1900	42	1.068366
35,000,001 to 40,000,000	5	197,595,858.98	13.39	3.5441	49	2.342687
40,000,001 to 45,000,000	2	85,500,000.00	5.79	3.1136	62	3.712047
45,000,001 to 50,000,000	3	143,600,000.00	9.73	3.5662	61	2.452006
5,000,001 to 10,000,000	14	105,616,152.08	7.15	3.7473	58	2.407873
50,000,001 to 55,000,000	2	107,657,017.33	7.29	3.5757	60	2.440675
55,000,001 to 60,000,000	2	114,900,000.00	7.78	3.2483	62	2.879661
60,000,001 to 65,000,000	0	0.00	0.00	0.0000	0	0.000000
65,000,001 to 70,000,000	1	70,000,000.00	4.74	2.7920	61	3.470000
70,000,001 to 75,000,000	1	75,000,000.00	5.08	2.8380	1	3.660000
75,000,001 to 80,000,000	0	0.00	0.00	0.0000	0	0.000000
80,000,001 to 85,000,000	0	0.00	0.00	0.0000	0	0.000000
85,000,000+	0	0.00	0.00	0.0000	0	0.000000
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200


Reports Available at sf.citidirect.com	v. 21.09.28	Page 10 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

STRATIFICATION DETAIL

October 19, 2026


Loan Rate

	Asset	Ending Scheduled	% of			Wtd Avg
Loan Rate Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

4.00 or Less	57	1,412,883,552.74	95.71	3.3420	56	2.625199
4.01 to 4.25	1	2,400,000.00	0.16	4.1000	61	1.060000
4.26 to 4.50	3	40,956,625.06	2.77	4.3651	8	2.344210
4.51 to 4.75	0	0.00	0.00	0.0000	0	0.000000
4.76 to 5.00	0	0.00	0.00	0.0000	0	0.000000
5.01 to 5.25	0	0.00	0.00	0.0000	0	0.000000
5.26 to 5.50	0	0.00	0.00	0.0000	0	0.000000
5.51 to 5.75	0	0.00	0.00	0.0000	0	0.000000
5.76 to 6.00	1	19,975,000.00	1.35	5.8870	61	6.050000
6.01 to 6.25	0	0.00	0.00	0.0000	0	0.000000
6.26 to 6.50	0	0.00	0.00	0.0000	0	0.000000
6.51 to 6.75	0	0.00	0.00	0.0000	0	0.000000
6.76 to 7.00	0	0.00	0.00	0.0000	0	0.000000
7.01 or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200

Property Type

	Asset	Ending Scheduled	% of			Wtd Avg
Property Type Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

Industrial	7	130,658,451.61	8.85	3.7216	61	2.436516
Lodging	0	0.00	0.00	0.0000	0	0.000000
Mixed Use	7	231,940,816.29	15.71	3.2162	61	2.896578
Multifamily	13	265,794,369.18	18.01	3.3400	60	2.593474
Office	14	405,964,950.46	27.50	3.2475	44	2.475262
Other	7	183,742,569.98	12.45	3.4737	48	2.449817
Retail	12	232,954,020.28	15.78	3.6792	60	3.169280
Self Storage	1	6,660,000.00	0.45	3.5100	62	2.500000
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200


Reports Available at sf.citidirect.com	v. 21.09.28	Page 11 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

STRATIFICATION DETAIL

October 19, 2026


Remaining Amortization Term

Remaining Amortization	Asset	Ending Scheduled	% of			Wtd Avg
Term Range	Count	Balance	Agg.Bal.	WAC	WAM	DSCR

240 Months or Less	50	1,211,772,527.29	82.09	3.4482	55	2.775999
241 to 270 Months	0	0.00	0.00	0.0000	0	0.000000
271 to 300 Months	0	0.00	0.00	0.0000	0	0.000000
301 Months or Greater	12	264,442,650.51	17.91	3.2133	51	2.135149
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200

Seasoning

	Asset	Ending Scheduled	% of			Wtd Avg
Seasoning Range	Count	Balance	Agg.Bal.	WAC	WAM	DSCR

12 Months or Less	0	0.00	0.00	0.0000	0	0.000000
13 to 24 Months	0	0.00	0.00	0.0000	0	0.000000
25 to 36 Months	0	0.00	0.00	0.0000	0	0.000000
37 to 48 Months	0	0.00	0.00	0.0000	0	0.000000
49 Months or Greater	62	1,476,215,177.80	100.00	3.4061	54	2.661200
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200


Reports Available at sf.citidirect.com	v. 21.09.28	Page 12 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

STRATIFICATION DETAIL

October 19, 2026


State

	Asset	Ending Scheduled	% of			Wtd Avg
State Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

Arizona	1	55,000,000.00	3.73	3.3610	60	3.370000
California	8	145,450,000.00	9.85	3.2677	60	3.088745
Connecticut	2	94,000,000.00	6.37	3.2570	62	2.620000
Florida	3	59,150,000.00	4.01	3.8915	61	2.282544
Georgia	2	21,575,000.00	1.46	5.7789	61	5.751136
Illinois	1	42,500,000.00	2.88	3.7800	62	2.500000
Indiana	1	8,200,000.00	0.56	3.3090	62	5.260000
Kansas	1	9,830,000.00	0.67	3.8900	61	1.940000
Massachusetts	6	211,290,816.29	14.31	2.7623	60	2.674987
Michigan	2	12,700,000.00	0.86	3.6859	62	3.208976
Mississippi	1	8,956,625.06	0.61	4.3200	25	1.500000
N/A	6	190,742,569.98	12.92	3.4994	49	2.459628
New Jersey	5	174,744,324.51	11.84	2.8242	35	2.952238
New York	9	173,784,288.58	11.77	3.6131	61	2.235976
North Carolina	1	12,813,460.64	0.87	3.8080	62	2.570000
Ohio	3	32,080,000.00	2.17	3.8937	43	2.559296
Oregon	1	40,000,000.00	2.71	3.6410	62	2.990000
Rhode Island	2	58,250,000.00	3.95	3.7908	62	2.386266
Tennessee	1	6,660,000.00	0.45	3.5100	62	2.500000
Texas	3	68,953,933.02	4.67	3.8148	62	1.564998
Utah	1	30,400,000.00	2.06	4.3750	1	2.610000
Vermont	1	5,869,159.72	0.40	3.6000	61	1.160000
Virginia	1	13,265,000.00	0.90	3.1800	58	3.220000
Total	62	1,476,215,177.80	100.00	3.4061	54	2.661200


Reports Available at sf.citidirect.com	v. 21.09.28	Page 13 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

MORTGAGE LOAN DETAIL

October 19, 2026


		Prop			Paid				Beginning	Ending		Payment Workout Mod
		Type			Through	Gross	Interest	Principal	Scheduled	Scheduled	Maturity	Status	Strategy Code
Loan ID	OMCR	(1)	City	State	Date	Coupon	Payment	Payment	Balance	Balance	Date	(2)	(3)	(4)

30508068	10	N/A			10/06/2026	3.24000%	108,207.17	80,868.92	40,076,727.90	39,995,858.98	11/06/2026	0	0	0
30508200	11A1	MF	Harrison	NJ	10/01/2026	2.45500%	87,970.83	-	43,000,000.00	43,000,000.00	12/01/2031	0	0	0
30508148	12	MF		IL	09/06/2026	3.78000%	133,875.00	-	42,500,000.00	42,500,000.00	12/06/2031	B	98	0
30507887	13A1	IN	Town of Burrillville	RI	10/06/2026	3.71000%	123,666.67	-	40,000,000.00	40,000,000.00	12/06/2031	0	0	0
30508193	14A1	RT	Tualatin	OR	10/05/2026	3.64100%	121,366.67	-	40,000,000.00	40,000,000.00	12/05/2031	0	0	0
30320459	15A1	IN			10/06/2026	3.85500%	128,500.00	-	40,000,000.00	40,000,000.00	12/06/2031	0	0	0
30508186	16	MF	Fort Lee	NJ	10/06/2026	2.62000%	71,392.32	46,864.68	32,698,771.83	32,651,907.15	12/06/2031	0	0	0
30508108	17	MF	Kew Garden Hills	NY	10/06/2026	2.47000%	59,289.20	68,633.33	28,804,470.30	28,735,836.97	11/06/2031	0	0	0
30507803	18	OF	Lehi	UT	10/01/2026	4.37500%	110,833.33	-	30,400,000.00	30,400,000.00	11/01/2026	0	0	0
30507941	19A2	RT	Concord	CA	10/05/2026	2.99000%	74,750.00	-	30,000,000.00	30,000,000.00	10/05/2031	0	0	0
30508000	20	N/A			10/06/2026	3.94000%	53,343.37	-	16,246,711.00	16,246,711.00	11/06/2031	0	0	0
30507995	21	IN	Oregon	OH	10/06/2026	3.97000%	27,723.83	-	8,380,000.00	8,380,000.00	11/06/2031	0	0	0
30508009	22	OF	Beverly Hills	CA	10/06/2026	2.90100%	56,086.00	-	23,200,000.00	23,200,000.00	11/06/2031	0	0	0
30508065	23	MU	New York	NY	10/06/2026	3.91000%	75,267.50	-	23,100,000.00	23,100,000.00	11/06/2031	0	0	0
30508219	24	OF	Sunnyvale	CA	10/06/2026	2.94800%	51,590.00	-	21,000,000.00	21,000,000.00	12/06/2031	0	0	0
30508187	25	N/A	New York	NY	10/06/2026	3.67000%	64,225.00	-	21,000,000.00	21,000,000.00	12/06/2031	0	0	0
30508028	26A3	RT	Los Angeles	CA	10/06/2026	3.49000%	58,166.67	-	20,000,000.00	20,000,000.00	10/06/2031	0	0	0
30508006	27	RT	Morrow	GA	10/06/2026	5.88700%	97,994.02	-	19,975,000.00	19,975,000.00	11/06/2031	0	0	0
30508080	28A2	RT	Audubon	NJ	10/06/2026	3.72000%	53,093.68	34,575.16	17,126,992.52	17,092,417.36	08/06/2031	0	0	0
30508197	29	MH	El Cajon	CA	10/06/2026	3.84000%	59,200.00	-	18,500,000.00	18,500,000.00	12/06/2031	0	0	0
30320453	2A1	OF	Greenwich	CT	10/06/2026	3.25700%	153,079.00	-	56,400,000.00	56,400,000.00	12/06/2031	0	0	0
30320454	2A2	OF	Greenwich	CT	10/06/2026	3.25700%	102,052.67	-	37,600,000.00	37,600,000.00	12/06/2031	0	0	0
30508145	30	MF	North Providence	RI	10/01/2026	3.96800%	60,346.67	-	18,250,000.00	18,250,000.00	12/01/2031	0	0	0
30508188	31	N/A			10/06/2026	3.32000%	49,800.00	-	18,000,000.00	18,000,000.00	12/06/2031	0	0	0
30508047	32	N/A			10/06/2026	3.91000%	58,650.00	-	18,000,000.00	18,000,000.00	11/06/2031	0	0	0
30508070	33	IN	Haverstraw	NY	10/06/2026	3.48000%	51,837.50	-	17,875,000.00	17,875,000.00	12/06/2031	0	0	0
30320461	34	MF	Los Angeles	CA	10/06/2026	3.76000%	55,146.67	-	17,600,000.00	17,600,000.00	11/06/2031	0	0	0
30507953	35	OF	Blue Ash	OH	10/01/2026	3.87100%	51,290.75	-	15,900,000.00	15,900,000.00	11/01/2028	0	0	0
30508142	36	MU	Jackson Heights	NY	10/06/2026	3.98000%	50,081.67	-	15,100,000.00	15,100,000.00	12/06/2031	0	0	0
30530175	37	RT	Vinton	VA	10/06/2026	3.18000%	35,152.25	-	13,265,000.00	13,265,000.00	08/06/2031	0	0	0
30508066	38	RT	Gastonia	NC	10/06/2026	3.80800%	40,728.25	21,071.46	12,834,532.10	12,813,460.64	12/06/2031	0	0	0
30508049	39	OF	Pomona	CA	10/06/2026	3.10000%	32,937.50	-	12,750,000.00	12,750,000.00	11/06/2031	0	0	0


Reports Available at sf.citidirect.com	v. 21.09.28	Page 14 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

MORTGAGE LOAN DETAIL

October 19, 2026


		Prop			Paid				Beginning	Ending		Payment Workout Mod
		Type			Through	Gross	Interest	Principal	Scheduled	Scheduled	Maturity	Status	Strategy Code
Loan ID	OMCR	(1)	City	State	Date	Coupon	Payment	Payment	Balance	Balance	Date	(2)	(3)	(4)

30320455	3A1	OF	Plainsboro	NJ	10/06/2026	2.83800%	177,375.00	-	75,000,000.00	75,000,000.00	04/06/2031	0	0	0
30508195	40	N/A	Nanuet	NY	10/01/2026	3.99300%	39,930.00	-	12,000,000.00	12,000,000.00	12/01/2031	0	0	0
30508069	41	RT	Austin	TX	10/06/2026	3.83900%	30,576.24	18,582.69	9,557,565.25	9,538,982.56	12/06/2031	0	0	0
30508046	42	IN	Topeka	KS	10/06/2026	3.89000%	31,865.58	-	9,830,000.00	9,830,000.00	11/06/2031	0	0	0
30508052	43	MF	Jackson	MS	07/06/2026	4.32000%	32,302.57	16,309.99	8,972,935.05	8,956,625.06	11/06/2028	2	98	0
30530176	44	IN	Indianapolis	IN	10/06/2026	3.30900%	22,611.50	-	8,200,000.00	8,200,000.00	12/06/2031	0	0	0
30530172	45	RT	Mason	OH	10/06/2026	3.85800%	25,077.00	-	7,800,000.00	7,800,000.00	11/06/2031	0	0	8
30508007	46	OF	West Palm Beach	FL	10/06/2026	3.35000%	21,077.08	-	7,550,000.00	7,550,000.00	11/06/2031	0	0	0
30530177	47	OF	Houston	TX	10/06/2026	3.89600%	21,980.67	12,292.95	6,770,226.08	6,757,933.13	12/06/2031	0	0	0
30508144	48	MF	Ann Arbor	MI	10/01/2026	3.65000%	21,291.67	-	7,000,000.00	7,000,000.00	12/01/2031	0	0	0
30508051	49	MF	Orange	NJ	10/06/2026	3.71000%	21,641.67	-	7,000,000.00	7,000,000.00	11/06/2031	0	0	0
30507836	4A5	OF	Cambridge	MA	10/05/2026	2.69250%	78,531.25	-	35,000,000.00	35,000,000.00	10/05/2031	0	0	0
30507837	4A6	OF	Cambridge	MA	10/05/2026	2.69250%	63,161.56	-	28,150,000.00	28,150,000.00	10/05/2031	0	0	0
30508185	5	N/A			10/06/2026	3.24000%	157,950.00	-	58,500,000.00	58,500,000.00	12/06/2031	0	0	0
30508158	50	SS		TN	10/06/2026	3.51000%	19,480.50	-	6,660,000.00	6,660,000.00	12/06/2031	0	0	0
30508073	51	IN	Yonkers	NY	10/06/2026	3.58000%	19,046.61	10,885.86	6,384,337.47	6,373,451.61	12/06/2031	0	0	0
30508106	52	RT	Springfield	VT	10/06/2026	3.60000%	17,643.21	11,908.74	5,881,068.46	5,869,159.72	11/06/2031	0	0	0
30508192	53	MF	Southfield	MI	10/06/2026	3.73000%	17,717.50	-	5,700,000.00	5,700,000.00	12/06/2031	0	0	0
30508218	54	MF	Brooklyn	NY	10/06/2026	3.64000%	12,133.33	-	4,000,000.00	4,000,000.00	12/06/2031	0	0	0
30508010	55	OF	Melbourne	FL	10/06/2026	3.98000%	11,940.00	-	3,600,000.00	3,600,000.00	11/06/2031	0	0	0
30320462	56	MF	Los Angeles	CA	10/06/2026	4.10000%	8,200.00	-	2,400,000.00	2,400,000.00	11/06/2031	0	0	0
30508110	57	RT	Newnan	GA	10/06/2026	4.43000%	5,906.67	-	1,600,000.00	1,600,000.00	11/06/2031	0	0	0
30508191	6	OF		TX	10/06/2026	3.80000%	167,073.96	103,181.30	52,760,198.63	52,657,017.33	12/06/2031	0	8	0
30530169	7A1	RT	Tucson	AZ	10/06/2026	3.36100%	154,045.83	-	55,000,000.00	55,000,000.00	10/06/2031	0	0	0
30508159	8A1	MF		FL	10/06/2026	3.97000%	158,800.00	-	48,000,000.00	48,000,000.00	12/06/2031	0	0	0
30508147	9	MU	New York	NY	10/01/2026	3.99000%	151,620.00	-	45,600,000.00	45,600,000.00	12/01/2031	0	0	0
30320449	A-1-2	MU	Cambridge	MA	10/06/2026	2.79200%	162,866.67	-	70,000,000.00	70,000,000.00	11/06/2036	0	0	0
30320450	A-1-4	MU	Cambridge	MA	10/06/2026	2.79200%	116,333.33	-	50,000,000.00	50,000,000.00	11/06/2036	0	0	0
30320451	A-1-9	MU	Cambridge	MA	10/06/2026	2.79200%	9,681.78	-	4,161,224.43	4,161,224.43	11/06/2036	0	0	0
30320452	A-3-3	MU	Cambridge	MA	10/06/2026	2.79200%	55,792.52	-	23,979,591.86	23,979,591.86	11/06/2036	0	0	0
Total	Count = 62						4,191,297.89	425,175.08	1,476,640,352.88	1,476,215,177.80


Reports Available at sf.citidirect.com	v. 21.09.28	Page 15 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

NOI DETAIL

October 19, 2026


		Property			Ending	Preceding	Most	Most Recent	Most Recent
		Type			Scheduled	Fiscal	Recent	Financial As of	Financial Asof
Loan ID	OMCR	(1)	City	State	Balance	Year NOI	NOI	Start Date	End Date

30508068	10	N/A			39,995,858.98	4,658,646.13	1,065,032.45	01/01/2026	03/31/2026
30508200	11A1	MF	Harrison	NJ	43,000,000.00	4,770,210.31	1,332,148.64	01/01/2026	03/31/2026
30508148	12	MF		IL	42,500,000.00	4,126,004.78	4,195,051.69	Not Available	Not Available
30507887	13A1	IN	Town of Burrillville	RI	40,000,000.00	5,785,858.14	5,888,704.88	01/01/2026	06/30/2026
30508193	14A1	RT	Tualatin	OR	40,000,000.00	7,416,156.66	7,394,603.78	01/01/2026	06/30/2026
30320459	15A1	IN			40,000,000.00	5,700,064.38	5,785,125.92	01/01/2026	06/30/2026
30508186	16	MF	Fort Lee	NJ	32,651,907.15	892,418.36	16,518.08	07/01/2025	06/30/2026
30508108	17	MF	Kew Garden Hills	NY	28,735,836.97	5,394,031.27	5,394,031.27	Not Available	Not Available
30507803	18	OF	Lehi	UT	30,400,000.00	3,570,559.37	3,686,772.78	01/01/2026	06/30/2026
30507941	19A2	RT	Concord	CA	30,000,000.00	11,769,631.41	12,274,442.88	01/01/2026	06/30/2026
30508000	20	N/A			16,246,711.00	2,138,052.93	2,093,940.30	Not Available	Not Available
30507995	21	IN	Oregon	OH	8,380,000.00	752,262.37	775,798.86	01/01/2026	06/30/2026
30508009	22	OF	Beverly Hills	CA	23,200,000.00	2,258,640.90	486,383.47	01/01/2026	03/31/2026
30508065	23	MU	New York	NY	23,100,000.00	2,426,593.91	2,358,864.66	01/01/2026	06/30/2026
30508219	24	OF	Sunnyvale	CA	21,000,000.00	2,806,037.43	2,658,884.34	01/01/2026	06/30/2026
30508187	25	N/A	New York	NY	21,000,000.00	1,229,525.59	1,490,528.18	01/01/2026	06/30/2026
30508028	26A3	RT	Los Angeles	CA	20,000,000.00	7,279,517.15	1,974,523.52	01/01/2026	03/31/2026
30508006	27	RT	Morrow	GA	19,975,000.00	7,845,922.88	7,845,922.88	Not Available	Not Available
30508080	28A2	RT	Audubon	NJ	17,092,417.36	4,063,580.32	3,586,212.31	01/01/2026	06/30/2026
30508197	29	MH	El Cajon	CA	18,500,000.00	1,594,621.53	1,524,250.02	01/01/2026	06/30/2026
30320453	2A1	OF	Greenwich	CT	56,400,000.00	8,321,578.79	2,213,702.56	01/01/2026	03/31/2026
30320454	2A2	OF	Greenwich	CT	37,600,000.00	8,321,578.79	2,213,702.56	01/01/2026	03/31/2026
30508145	30	MF	North Providence	RI	18,250,000.00	1,712,723.99	1,798,469.46	01/01/2026	06/30/2026
30508188	31	N/A			18,000,000.00	1,630,987.62	1,532,428.82	07/01/2025	06/30/2026
30508047	32	N/A			18,000,000.00	1,708,226.03	1,727,321.87	01/01/2026	06/30/2026
30508070	33	IN	Haverstraw	NY	17,875,000.00	1,817,184.54	1,688,159.46	01/01/2026	06/30/2026
30320461	34	MF	Los Angeles	CA	17,600,000.00	1,872,278.06	1,872,278.06	Not Available	Not Available
30507953	35	OF	Blue Ash	OH	15,900,000.00	1,858,203.18	1,814,536.67	07/01/2025	06/30/2026
30508142	36	MU	Jackson Heights	NY	15,100,000.00	1,238,086.81	1,234,296.38	01/01/2026	06/30/2026
30530175	37	RT	Vinton	VA	13,265,000.00	1,448,065.18	1,438,673.26	01/01/2026	06/30/2026
30508066	38	RT	Gastonia	NC	12,813,460.64	1,854,536.66	2,029,447.31	Not Available	Not Available
30508049	39	OF	Pomona	CA	12,750,000.00	2,035,039.11	2,031,048.48	07/01/2025	06/30/2026
Reports Available at sf.citidirect.com		v. 21.09.28			Page 16 of 32			© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

NOI DETAIL

October 19, 2026


		Property			Ending	Preceding	Most	Most Recent	Most Recent
		Type			Scheduled	Fiscal	Recent	Financial As of	Financial Asof
Loan ID	OMCR	(1)	City	State	Balance	Year NOI	NOI	Start Date	End Date

30320455	3A1	OF	Plainsboro	NJ	75,000,000.00	25,326,230.00	22,349,787.48	07/01/2025	06/30/2026
30508195	40	N/A	Nanuet	NY	12,000,000.00	908,702.27	1,112,518.95	Not Available	Not Available
30508069	41	RT	Austin	TX	9,538,982.56	1,169,937.61	1,204,878.13	01/01/2026	06/30/2026
30508046	42	IN	Topeka	KS	9,830,000.00	757,412.40	755,127.06	07/01/2025	06/30/2026
30508052	43	MF	Jackson	MS	8,956,625.06	901,428.41	901,428.41	Not Available	Not Available
30530176	44	IN	Indianapolis	IN	8,200,000.00	1,484,392.18	1,607,849.83	01/01/2026	06/30/2026
30530172	45	RT	Mason	OH	7,800,000.00	847,412.41	867,325.60	01/01/2026	06/30/2026
30508007	46	OF	West Palm Beach	FL	7,550,000.00	833,315.83	753,767.64	Not Available	Not Available
30530177	47	OF	Houston	TX	6,757,933.13	838,952.99	801,723.40	07/01/2025	06/30/2026
30508144	48	MF	Ann Arbor	MI	7,000,000.00	971,152.10	992,979.05	01/01/2026	06/30/2026
30508051	49	MF	Orange	NJ	7,000,000.00	545,119.31	115,826.74	01/01/2026	03/31/2026
30507836	4A5	OF	Cambridge	MA	35,000,000.00	19,252,682.36	7,543,267.72	01/01/2026	06/30/2026
30507837	4A6	OF	Cambridge	MA	28,150,000.00	19,252,682.36	7,543,267.72	01/01/2026	06/30/2026
30508185	5	N/A			58,500,000.00	6,844,727.56	6,843,794.16	01/01/2026	06/30/2026
30508158	50	SS		TN	6,660,000.00	590,089.24	602,714.39	07/01/2025	06/30/2026
30508073	51	IN	Yonkers	NY	6,373,451.61	585,481.49	705,000.33	01/01/2026	06/30/2026
30508106	52	RT	Springfield	VT	5,869,159.72	548,648.46	548,648.46	Not Available	Not Available
30508192	53	MF	Southfield	MI	5,700,000.00	522,672.19	571,590.79	01/01/2026	06/30/2026
30508218	54	MF	Brooklyn	NY	4,000,000.00	333,901.05	362,464.96	01/01/2026	06/30/2026
30508010	55	OF	Melbourne	FL	3,600,000.00	328,724.82	329,767.61	01/01/2026	06/30/2026
30320462	56	MF	Los Angeles	CA	2,400,000.00	219,471.62	107,271.36	01/01/2026	06/30/2026
30508110	57	RT	Newnan	GA	1,600,000.00	149,593.92	149,593.92	01/01/2026	06/30/2026
30508191	6	OF		TX	52,657,017.33	5,363,544.09	1,426,860.36	01/01/2026	03/31/2026
30530169	7A1	RT	Tucson	AZ	55,000,000.00	11,668,671.16	11,756,506.94	01/01/2026	06/30/2026
30508159	8A1	MF		FL	48,000,000.00	7,747,786.61	7,574,465.11	07/01/2025	06/30/2026
30508147	9	MU	New York	NY	45,600,000.00	3,026,575.59	2,984,027.88	01/01/2026	06/30/2026
30320449	A-1-2	MU	Cambridge	MA	70,000,000.00	80,093,684.00	80,093,684.00	Not Available	Not Available
30320450	A-1-4	MU	Cambridge	MA	50,000,000.00	80,093,684.00	80,093,684.00	Not Available	Not Available
30320451	A-1-9	MU	Cambridge	MA	4,161,224.43	80,093,684.00	80,093,684.00	Not Available	Not Available
30320452	A-3-3	MU	Cambridge	MA	23,979,591.86	80,093,684.00	80,093,684.00	Not Available	Not Available
Total	Count = 62				1,476,215,177.80	551,690,868.61	494,308,995.80


Reports Available at sf.citidirect.com	v. 21.09.28	Page 17 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

DELINQUENCY LOAN DETAIL

October 19, 2026

Actual

Paid

Current P&I

Total P&I

Cumulative

Other Expense

Payment Workout

Most Recent

Principal

Through

Advances

Accrued Unpaid

Advances

Status

Strategy

Special Serv

Foreclosure

Bankruptcy

REO

Loan ID

OMCR

Balance

Date

(Net of ASER)

Outstanding

Interest Advances

Outstanding

(2)

(3)

Transfer Date

Date

30508148

42,500,000.00

09/06/2026

133,786.46

03/15/2024

30508052

9,003,232.37

07/06/2026

40,522.90

137,709.29

2,701.85

44,954.50

12/10/2025

07/02/2026

Total

Count = 2

51,503,232.37

174,309.36

271,495.75

2,701.85

44,954.50


Reports Available at sf.citidirect.com	v. 21.09.28	Page 18 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL

October 19, 2026


				Delinquent
			(Does not include loans in Bankruptcy, Foreclosure, or REO)

		30 Day		60 Day		90 Day	120+ Day		Bankruptcy		Foreclosure			REO

Distribution

Date	Count	Balance	Count	Balance	Count	Balance	Count	Balance	Count	Balance	Count	Balance	Count		Balance


	0	0	1	8,956,625	0	0	0	0	0	0	0	0	0		0
10/19/2026
	0.0%	0.0%	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	1	8,972,935	0	0	0	0	0	0	0		0
09/17/2026
	0.0%	0.0%	0.0%	0.0%	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	1	8,988,112	0	0	0	0	0	0	0	0	0		0
08/17/2026
	0.0%	0.0%	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	1	9,003,232	0	0	0	0	0	0	0	0	0	0	0		0
07/17/2026
	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	1	42,500,000	0	0	0	0	0	0	0	0	0	0	0		0
06/17/2026
	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	0	0	0	0	0	0	0		0
05/15/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	1	9,050,411	0	0	0	0	0	0	0	0	0	0	0		0
04/17/2026
	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	1	9,065,301	0	0	0	0	0	0	0	0	0		0
03/17/2026
	0.0%	0.0%	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	1	9,083,393	0	0	0	0	0	0	0	0	0	0	0		0
02/18/2026
	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	1	9,098,160	0	0	0	0	0	0	0	0	0		0
01/16/2026
	0.0%	0.0%	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	1	75,000,000	1	9,112,873	0	0	0	0	0	0	0	0	0		0
12/17/2025
	1.6%	0.0%	1.6%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	2	84,128,623	0	0	0	0	0	0	0	0	0	0	0		0
11/18/2025
	3.2%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%


Reports Available at sf.citidirect.com	v. 21.09.28	Page 19 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

HISTORICAL LOAN MODIFICATION DETAIL

October 19, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

10/19/2026	30530172	45	Shoppes of Mason	04/09/2025	8
09/17/2026	30530172	45	Shoppes of Mason	04/09/2025	8
08/17/2026	30530172	45	Shoppes of Mason	04/09/2025	8
07/17/2026	30530172	45	Shoppes of Mason	04/09/2025	8
06/17/2026	30530172	45	Shoppes of Mason	04/09/2025	8
05/15/2026	30530172	45	Shoppes of Mason	04/09/2025	8
04/17/2026	30530172	45	Shoppes of Mason	04/09/2025	8
03/17/2026	30530172	45	Shoppes of Mason	04/09/2025	8
02/18/2026	30530172	45	Shoppes of Mason	04/09/2025	8
01/16/2026	30530172	45	Shoppes of Mason	04/09/2025	8
12/17/2025	30530172	45	Shoppes of Mason	04/09/2025	8
11/18/2025	30530172	45	Shoppes of Mason	04/09/2025	8
10/20/2025	30530172	45	Shoppes of Mason	04/09/2025	8
09/17/2025	30530172	45	Shoppes of Mason	04/09/2025	8
08/15/2025	30530172	45	Shoppes of Mason	04/09/2025	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 23 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

SPECIALLY SERVICED LOAN DETAIL

October 19, 2026


			Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
		Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer	Master Servicer
Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

30508052	43	98	5,000.00	8,956,625.06	9,003,232.37	15,300,000.00	08/27/2021	12/10/2025
30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
Total	Count = 2		13,854.17	51,456,625.06	51,503,232.37	79,100,000.00


Reports Available at sf.citidirect.com	v. 21.09.28	Page 24 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

HISTORICAL SPECIALLY SERVICED LOANS

October 19, 2026


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer	Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

10/19/2026	30508052	43	98	5,000.00	8,956,625.06	9,003,232.37	15,300,000.00	08/27/2021	12/10/2025
09/17/2026	30508052	43	98	5,000.00	8,972,935.05	9,034,379.85	15,300,000.00	08/27/2021	12/10/2025
08/17/2026	30508052	43	98	5,000.00	8,988,111.83	9,034,379.85	15,300,000.00	08/27/2021	12/10/2025
07/17/2026	30508052	43	98	5,000.00	9,003,232.37	9,034,379.85	15,300,000.00	08/27/2021	12/10/2025
06/17/2026	30508052	43	98	5,000.00	9,019,375.18	9,034,379.85	15,300,000.00	08/27/2021	12/10/2025
05/15/2026	30508052	43	98	5,000.00	9,034,379.85	9,034,379.85	15,300,000.00	08/27/2021	12/10/2025
04/17/2026	30508052	43	98	5,000.00	9,050,410.93	9,083,392.93	15,300,000.00	08/27/2021	12/10/2025
03/17/2026	30508052	43	98	5,000.00	9,065,300.57	9,112,873.00	15,300,000.00	08/27/2021	12/10/2025
02/18/2026	30508052	43	98	5,000.00	9,083,392.93	9,112,873.00	15,300,000.00	08/27/2021	12/10/2025
01/16/2026	30508052	43	98	5,000.00	9,098,160.33	9,143,222.29	15,300,000.00	08/27/2021	12/10/2025
10/19/2026	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
09/17/2026	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
08/17/2026	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
07/17/2026	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
06/17/2026	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
05/15/2026	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
04/17/2026	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
03/17/2026	30508148	12	98	8,263.89	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
02/18/2026	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
01/16/2026	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
12/17/2025	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
11/18/2025	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
10/20/2025	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
09/17/2025	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
08/15/2025	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
07/17/2025	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
06/17/2025	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
05/16/2025	30508148	12	9	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
04/17/2025	30508148	12	9	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
03/17/2025	30508148	12	9	8,263.89	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
02/18/2025	30508148	12	9	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
01/17/2025	30508148	12	9	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024


Reports Available at sf.citidirect.com	v. 21.09.28	Page 25 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

HISTORICAL SPECIALLY SERVICED LOANS

October 19, 2026


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer	Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

12/17/2024	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
11/18/2024	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
10/18/2024	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
09/17/2024	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
08/16/2024	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
07/17/2024	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
06/17/2024	30508148	12	98	9,149.31	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
05/17/2024	30508148	12	98	8,854.17	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
04/17/2024	30508148	12	98	6,493.06	42,500,000.00	42,500,000.00	63,800,000.00	10/14/2021	03/15/2024
11/18/2024	30508191	6	8	11,838.31	54,900,532.35	54,900,532.35	85,670,000.00		06/23/2023	11/06/2024
10/18/2024	30508191	6	98	11,476.39	54,990,845.34	54,990,845.34	85,670,000.00		06/23/2023
09/17/2024	30508191	6	98	11,878.25	55,086,659.51	55,086,659.51	85,670,000.00		06/23/2023
08/16/2024	30508191	6	98	11,897.49	55,176,365.44	55,176,365.44	85,670,000.00		06/23/2023
07/17/2024	30508191	6	98	11,533.48	55,265,778.79	55,265,778.79	85,670,000.00		06/23/2023
06/17/2024	30508191	6	98	11,937.05	55,360,725.09	55,360,725.09	85,670,000.00		06/23/2023
05/17/2024	30508191	6	98	11,571.65	55,449,537.14	55,449,537.14	85,670,000.00		06/23/2023
04/17/2024	30508191	6	98	11,976.36	55,543,903.37	55,543,903.37	85,670,000.00		06/23/2023
03/15/2024	30508191	6	98	11,223.76	55,632,117.98	55,632,117.98	85,670,000.00		06/23/2023
02/16/2024	30508191	6	98	12,016.67	55,731,772.09	55,819,373.95	85,670,000.00		06/23/2023
01/18/2024	30508191	6	98	12,035.47	55,819,373.95	55,819,373.95	85,670,000.00		06/23/2023
12/15/2023	30508191	6	98	11,666.59	55,906,690.10	55,906,690.10	85,670,000.00		06/23/2023
11/17/2023	30508191	6	98	12,074.14	55,999,613.25	55,999,613.25	85,670,000.00		06/23/2023
10/17/2023	30508191	6	98	11,703.90	56,086,341.54	56,086,341.54	85,670,000.00		06/23/2023
09/15/2023	30508191	6	98	12,112.57	56,178,697.59	56,178,697.59	85,670,000.00		06/23/2023
08/17/2023	30508191	6	98	12,131.05	56,264,841.78	56,350,705.01	85,670,000.00		06/23/2023
07/17/2023	30508191	6	98	5,095.48	56,350,705.01	56,442,226.55	85,670,000.00		06/23/2023


Reports Available at sf.citidirect.com	v. 21.09.28	Page 26 of 32	© Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust

Commercial Mortgage Pass Through Certificates, Series 2021-B31

CREFC® INVESTOR REPORTING PACKAGE LEGENDS

October 19, 2026


1\|CREFC Investor Reporting Package Legends
	Property Type (1)		Workout Strategy (3)		Liquidation/Prepayment Code (5)

MF	Multifamily	1	Modification	1	Partial Liquidation (Curtailment)
RT	Retail	2	Foreclosure	2	Payoff Prior To Maturity
HC	HealthCare	3	Bankruptcy	3	Disposition / Liquidation
IN	Industrial	4	Extension	4	Repurchase / Substitution
MH	Mobile Home Park	5	Note Sale	5	Full Payoff At Maturity
OF	Office	6	DPO	6	DPO
MU	Mixed Use	7	REO	7	Liquidation prior to 7/1/2006
LO	Lodging	8	Resolved	8	Payoff With Penalty
SS	Self Storage	9	Pending Return to Master Servicer	9	Payoff With Yield Maintenance
SE	Securities	10	Deed In Lieu of Foreclosure	10	Curtailment With Penalty
CH	Cooperative Housing	11	Full Payoff	11	Curtailment With Yield Maintenance
ZZ	Missing Information	12	Reps and Warranties
SF	SF	13	TBD
WH	Warehouse	98	Other
OT	Other

			Modification Code (4)
	Payment Status of Loan (2)
		1	Maturity Date Extension
A	In Grace Period	2	Amortization Change
B	Late, but less than 30 Days	3	Principal Write-Off
0	Current	4	Blank (formerly Combination)
1	30-59 Days Delinquent	5	Temporary Rate Reduction
2	60-89 Days Delinquent	6	Capitalization of Interest
3	90-120 Days Delinquent	7	Capitalization of Taxes
4	Performing Matured Balloon	8	Other
5	Non Performing Matured Balloon	9	Combination
6	121+ Days Delinquent	10	Forbearance


Reports Available at sf.citidirect.com	v. 21.09.28	Page 31 of 32	© Copyright 2026 Citigroup


			Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Loan ID	OMCR	Property Name	Scheduled Balance	Scheduled Balance	Reduction Amount	Reduction Date	ASER Amount	ASER Amount

30508052	43	Fondren Hill Apartments	8,972,935.05	8,956,625.06	2,243,233.76	10/13/2026	8,070.97	8,070.97


Reports Available at sf.citidirect.com	v. 21.09.28	Page 20 of 32	© Copyright 2026 Citigroup


Reports Available at sf.citidirect.com	v. 21.09.28	Page 21 of 32	© Copyright 2026 Citigroup


Reports Available at sf.citidirect.com	v. 21.09.28	Page 22 of 32	© Copyright 2026 Citigroup


		Liquidation /	Liquid / Prepay	Principal	Principal	Prepayment Interest	Prepayment	Yield Maintenance
Loan ID	OMCR	Prepayment Date	Code (5)	Collections	Adjustments	Excess / (Shortfall)	Penalties (PPP)	Penalties (YM)

No Loans with Unscheduled Principal Activity to Report.


Reports Available at sf.citidirect.com	v. 21.09.28	Page 27 of 32	© Copyright 2026 Citigroup


Reports Available at sf.citidirect.com	v. 21.09.28	Page 28 of 32	© Copyright 2026 Citigroup


		Beginning	Most	Liquidation	Net		Net	Realized	Date of		Loss with
		Scheduled	Recent	Sales	Proceeds	Liquidation	Proceeds	Loss to	Current	Current Cumulative	Cumulative
Loan ID	OMCR	Balance	Value	Price	Received	Expense	Available	Trust	Adj. to Loan	Adj. to Loan Adj. to Loan	Adj. to Trust

No Loans liquidated to Report.


Reports Available at sf.citidirect.com	v. 21.09.28	Page 29 of 32	© Copyright 2026 Citigroup


Reports Available at sf.citidirect.com	v. 21.09.28	Page 30 of 32	© Copyright 2026 Citigroup


Reports Available at sf.citidirect.com	v. 21.09.28	Page 32 of 32	© Copyright 2026 Citigroup