Exhibit 99.1
REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS

Board of Directors and Management of Credit Acceptance Corporation, Credit Acceptance Auto Loan Trust 2026-2, and BMO Capital Markets Corp:

We have performed the procedures enumerated below, on certain information with respect to attributes of the Credit Acceptance Corporation’s (the “Company”) retail installment contracts (the “Consumer Loans”) as of June 30, 2026 (the “Subject Matter”) related to Credit Acceptance Auto Loan Trust 2026-2’s (the “Issuer”) issuance of certain classes of Notes (the “Securitization Transaction”). The Company’s management is responsible for the data file accurately representing the information included in the underlying asset documents and the disclosed assumptions and methodologies.

The Company has agreed to and acknowledged that the procedures performed are appropriate to meet the intended purpose of assisting specified parties in evaluating the Subject Matter. This report may not be suitable for any other purpose. Additionally, the Issuer and BMO Capital Markets Corp (“BMO” and together with the Company and the Issuer, the “Specified Parties”) have agreed to and acknowledged that the procedures performed are appropriate for their purposes. The procedures performed may not address all the items of interest to a user of this report and may not meet the needs of all users of this report and, as such, users are responsible for determining whether the procedures performed are appropriate for their purposes.
Consequently, we make no representation regarding the appropriateness of the procedures enumerated below either for the purpose for which this report has been requested or for any other purpose.
The procedures we performed and our findings are as follows:
1.The Company provided an electronic file (the “Data File”) with information for certain Consumer Loans included in the Securitization Transaction, which the Company represented was as of the close of business on June 30, 2026.
2.Grant Thornton selected one hundred Consumer Loans on a random basis from the Data File. The sample of Consumer Loans are listed in Exhibit A. For each of the selected Consumer Loans we compared the following information, designated by BMO, to the related retail installment contract provided by the Company, and compared the Vehicle Identification Number (“VIN”) on the Consumer Loan to the title document (actual title, title application, VINtek, or acceptable proof of lien, as applicable). For instances where consumers changed their address subsequent to the origination of their Consumer Loan, we compared the state to other Company records.
a.Consumer Loan number
b.Original amount financed
c.First payment date (scheduled)
d.Original term to maturity
e.Monthly payment
f.Interest rate
g.State
h.VIN
We defined the term “compare” as meaning we compared to the information shown in the Data File and found it to be in agreement. Such information was deemed to be in agreement if differences were attributable to rounding. The term “rounding” was defined as meaning amounts and percentages that were within $1 and 0.1%, respectively. We noted no exceptions.
We were engaged by the Company to perform this agreed-upon procedures engagement and conducted our engagement in accordance with attestation standards established by the American Institute of Certified Public Accountants. We were not engaged to and did not conduct an examination or review, the objective of which would be the expression of an opinion or conclusion, respectively, on the Subject Matter. Accordingly, we do not express such an opinion or conclusion. Had we performed additional procedures, other matters might have come to our attention that would have been reported to you.




Our agreed-upon procedures engagement was not conducted for the purpose of the following:
Addressing the conformity of the origination of the assets to stated underwriting or credit extension guidelines, standards, criteria, or other requirements
Addressing the value of collateral securing any such assets being securitized
Addressing the compliance of the originator of the assets with federal, state, and local laws and regulations
Satisfying any criteria for due diligence published by a nationally recognized statistical rating organization
Addressing any other factor or characteristic of the assets that would be material to the likelihood that the issuer of the asset-backed security will pay interest and principal in accordance with applicable terms and conditions
Forming any conclusions
Any other terms or requirements of the transaction that do not appear in this report.
We are required to be independent of the Company and to meet our other ethical responsibilities, in accordance with the relevant ethical requirements relating to our agreed-upon procedures engagement.
This report is intended solely for the information and use of the Specified Parties. It is not intended to be, and should not be, used by anyone other than these specified parties, including investors and rating agencies, who are not identified as specified parties but who may have access to this report as required by law or regulation.
/s/ GRANT THORNTON LLP
Southfield, Michigan
July 31, 2026




Exhibit A
Sample
Consumer Loan Number
Sample
Consumer Loan Number
Sample
Consumer Loan Number
1
XXXXX5440
35
XXXXX8396
69
XXXXX9438
2
XXXXX8474
36
XXXXX1910
70
XXXXX1623
3
XXXXX3929
37
XXXXX9745
71
XXXXX2411
4
XXXXX4290
38
XXXXX2635
72
XXXXX0807
5
XXXXX1376
39
XXXXX8114
73
XXXXX4404
6
XXXXX5962
40
XXXXX1361
74
XXXXX2486
7
XXXXX0353
41
XXXXX0101
75
XXXXX9672
8
XXXXX0506
42
XXXXX9823
76
XXXXX6393
9
XXXXX6585
43
XXXXX6337
77
XXXXX7858
10
XXXXX5762
44
XXXXX0519
78
XXXXX9373
11
XXXXX6338
45
XXXXX5489
79
XXXXX0307
12
XXXXX9017
46
XXXXX4391
80
XXXXX5471
13
XXXXX5890
47
XXXXX4760
81
XXXXX8536
14
XXXXX6145
48
XXXXX7399
82
XXXXX7918
15
XXXXX7443
49
XXXXX6691
83
XXXXX1054
16
XXXXX1393
50
XXXXX3493
84
XXXXX2048
17
XXXXX9875
51
XXXXX2444
85
XXXXX0434
18
XXXXX9276
52
XXXXX6312
86
XXXXX5145
19
XXXXX0762
53
XXXXX1823
87
XXXXX1281
20
XXXXX8720
54
XXXXX0493
88
XXXXX3400
21
XXXXX6955
55
XXXXX6042
89
XXXXX2110
22
XXXXX6507
56
XXXXX7330
90
XXXXX2201
23
XXXXX3795
57
XXXXX5879
91
XXXXX1119
24
XXXXX2497
58
XXXXX0794
92
XXXXX7120
25
XXXXX0429
59
XXXXX6573
93
XXXXX1029
26
XXXXX3798
60
XXXXX4631
94
XXXXX1200
27
XXXXX3468
61
XXXXX4642
95
XXXXX8043
28
XXXXX9460
62
XXXXX6908
96
XXXXX3082
29
XXXXX6774
63
XXXXX5615
97
XXXXX8845
30
XXXXX7980
64
XXXXX9925
98
XXXXX5278
31
XXXXX7613
65
XXXXX6119
99
XXXXX6159
32
XXXXX5773
66
XXXXX1817
100
XXXXX4010
33
XXXXX2296
67
XXXXX5119
34
XXXXX0818
68
XXXXX0093