v3.26.1
Shareholder Report
12 Months Ended
May 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name T. ROWE PRICE RETIREMENT FUNDS, INC.
Entity Central Index Key 0001177017
Entity Investment Company Type N-1A
Document Period End Date May 31, 2026
Shareholder Report Annual or Semi-Annual Annual Shareholder Report
C000129672  
Shareholder Report [Line Items]  
Fund Name Target 2040 Fund
Class Name Investor Class
Trading Symbol TRHRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Target 2040 Fund (the "fund") for the period of June 1, 2025 to May 31, 2026.
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Target 2040 Fund - Investor Class
$63
0.57%
Expenses Paid, Amount $ 63
Expense Ratio, Percent 0.57%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • Global stock indexes and fixed income markets generated strong returns for the 12 months ended May 31, 2026. Equities were supported by solid corporate earnings, enthusiasm for artificial intelligence and semiconductor-related investments, and periods of easing monetary policy as major central banks, including the Federal Reserve, reduced interest rates in late 2025. Despite volatility from shifting U.S. tariff policies and the U.S.-Iran conflict, markets recovered as ceasefire progress reduced energy-price pressures and improved investor sentiment, while fixed income benefited from declining yields, resilient credit markets, and easing geopolitical risks.

  • Compared with the style-specific S&P Target Date 2040 Index, security selection within the allocations to international developed and emerging equities added value, particularly within international developed core and value. Additionally, an overweight allocation to emerging markets equities, which strongly outpaced international developed markets, had a positive impact on relative results.

  • Conversely, security selection within some of the underlying portfolios detracted from relative results, including allocations to U.S. large-cap value, core, and growth stocks.

  • The fund seeks the highest total return over time consistent with an emphasis on both capital growth and income. The fund invests in a diversified portfolio of other T. Rowe Price stock and bond mutual funds that represent various asset classes and sectors. Its allocation among T. Rowe Price funds will change over time in relation to its target retirement date.

Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph. 

Investor Class 25,812 
Regulatory Benchmark 40,876 
Strategy Benchmark 27,843
Table Summary
Investor Class
Regulatory Benchmark
Strategy Benchmark
2016
10,000
10,000
10,000
2016
10,410
10,445
10,375
2016
10,366
10,693
10,393
2017
11,026
11,520
11,040
2017
11,545
11,769
11,427
2017
11,925
12,123
11,741
2017
12,463
13,074
12,450
2018
12,653
13,389
12,622
2018
12,633
13,542
12,704
2018
12,941
14,577
13,148
2018
12,355
13,797
12,464
2019
12,809
14,065
12,795
2019
12,788
13,880
12,634
2019
13,397
14,768
13,171
2019
13,986
15,934
13,996
2020
13,580
15,036
13,269
2020
13,558
15,471
13,239
2020
15,149
17,935
14,769
2020
16,081
18,966
15,664
2021
17,155
20,347
16,681
2021
18,269
22,264
17,966
2021
18,946
23,861
18,596
2021
18,575
23,961
18,312
2022
17,747
22,849
17,802
2022
16,582
21,444
16,876
2022
15,801
20,692
16,060
2022
16,242
21,373
16,566
2023
16,188
21,004
16,674
2023
16,536
21,880
16,980
2023
17,401
23,745
17,895
2023
17,546
24,067
18,061
2024
19,024
27,012
19,575
2024
19,642
27,916
20,185
2024
20,643
29,953
21,373
2024
21,236
32,367
21,946
2025
21,151
31,748
21,929
2025
21,368
31,578
22,379
2025
22,670
34,698
23,983
2025
23,640
36,765
25,096
2026
24,972
37,150
26,470
2026
25,812
40,876
27,843
Average Annual Return [Table Text Block]
Table Summary
 
1 Year
5 Years
10 Years
Target 2040 Fund (Investor Class)
20.80%
7.16%
9.95%
Russell 3000 Index (Regulatory Benchmark)
29.45
12.92
15.12
S&P Target Date 2040 Index (Strategy Benchmark)
24.41
9.16
10.78
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 448,394,000
Holdings Count | Holding 24
Advisory Fees Paid, Amount $ 2,049,000
InvestmentCompanyPortfolioTurnover 31.40%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$448,394
  • Number of Portfolio Holdings24
Holdings [Text Block]
Table Summary
Domestic Equity Funds
51.6%
International Equity Funds
21.4
Domestic Bond Funds
18.8
International Bond Funds
7.0
Short-Term and Other
1.2
Largest Holdings [Text Block]
Table Summary
T. Rowe Price Growth Stock Fund
12.4%
T. Rowe Price Value Fund
12.2
T. Rowe Price New Income Fund
8.4
T. Rowe Price Equity Index 500 Fund
7.0
T. Rowe Price U.S. Large-Cap Core Fund
6.8
T. Rowe Price Limited Duration Inflation Focused Bond Fund
6.3
T. Rowe Price International Value Equity Fund
6.1
T. Rowe Price Overseas Stock Fund
5.5
T. Rowe Price International Stock Fund
4.9
T. Rowe Price Real Assets Fund
4.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000129673  
Shareholder Report [Line Items]  
Fund Name Target 2040 Fund
Class Name Advisor Class
Trading Symbol PAHHX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Target 2040 Fund (the "fund") for the period of June 1, 2025 to May 31, 2026.
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Target 2040 Fund - Advisor Class
$90
0.82%
Expenses Paid, Amount $ 90
Expense Ratio, Percent 0.82%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • Global stock indexes and fixed income markets generated strong returns for the 12 months ended May 31, 2026. Equities were supported by solid corporate earnings, enthusiasm for artificial intelligence and semiconductor-related investments, and periods of easing monetary policy as major central banks, including the Federal Reserve, reduced interest rates in late 2025. Despite volatility from shifting U.S. tariff policies and the U.S.-Iran conflict, markets recovered as ceasefire progress reduced energy-price pressures and improved investor sentiment, while fixed income benefited from declining yields, resilient credit markets, and easing geopolitical risks.

  • Compared with the style-specific S&P Target Date 2040 Index, security selection within the allocations to international developed and emerging equities added value, particularly within international developed core and value. Additionally, an overweight allocation to emerging markets equities, which strongly outpaced international developed markets, had a positive impact on relative results.

  • Conversely, security selection within some of the underlying portfolios detracted from relative results, including allocations to U.S. large-cap value, core, and growth stocks.

  • The fund seeks the highest total return over time consistent with an emphasis on both capital growth and income. The fund invests in a diversified portfolio of other T. Rowe Price stock and bond mutual funds that represent various asset classes and sectors. Its allocation among T. Rowe Price funds will change over time in relation to its target retirement date.

Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph. 

Advisor Class 25,153 
Regulatory Benchmark 40,876 
Strategy Benchmark 27,843
Table Summary
Advisor Class
Regulatory Benchmark
Strategy Benchmark
2016
10,000
10,000
10,000
2016
10,403
10,445
10,375
2016
10,349
10,693
10,393
2017
10,992
11,520
11,040
2017
11,511
11,769
11,427
2017
11,881
12,123
11,741
2017
12,401
13,074
12,450
2018
12,581
13,389
12,622
2018
12,562
13,542
12,704
2018
12,859
14,577
13,148
2018
12,274
13,797
12,464
2019
12,704
14,065
12,795
2019
12,674
13,880
12,634
2019
13,270
14,768
13,171
2019
13,857
15,934
13,996
2020
13,443
15,036
13,269
2020
13,412
15,471
13,239
2020
14,982
17,935
14,769
2020
15,888
18,966
15,664
2021
16,944
20,347
16,681
2021
18,028
22,264
17,966
2021
18,678
23,861
18,596
2021
18,310
23,961
18,312
2022
17,474
22,849
17,802
2022
16,319
21,444
16,876
2022
15,535
20,692
16,060
2022
15,972
21,373
16,566
2023
15,911
21,004
16,674
2023
16,243
21,880
16,980
2023
17,074
23,745
17,895
2023
17,204
24,067
18,061
2024
18,639
27,012
19,575
2024
19,248
27,916
20,185
2024
20,210
29,953
21,373
2024
20,771
32,367
21,946
2025
20,682
31,748
21,929
2025
20,870
31,578
22,379
2025
22,138
34,698
23,983
2025
23,067
36,765
25,096
2026
24,355
37,150
26,470
2026
25,153
40,876
27,843
Average Annual Return [Table Text Block]
Table Summary
 
1 Year
5 Years
10 Years
Target 2040 Fund (Advisor Class)
20.52%
6.89%
9.66%
Russell 3000 Index (Regulatory Benchmark)
29.45
12.92
15.12
S&P Target Date 2040 Index (Strategy Benchmark)
24.41
9.16
10.78
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 448,394,000
Holdings Count | Holding 24
Advisory Fees Paid, Amount $ 2,049,000
InvestmentCompanyPortfolioTurnover 31.40%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$448,394
  • Number of Portfolio Holdings24
Holdings [Text Block]
Table Summary
Domestic Equity Funds
51.6%
International Equity Funds
21.4
Domestic Bond Funds
18.8
International Bond Funds
7.0
Short-Term and Other
1.2
Largest Holdings [Text Block]
Table Summary
T. Rowe Price Growth Stock Fund
12.4%
T. Rowe Price Value Fund
12.2
T. Rowe Price New Income Fund
8.4
T. Rowe Price Equity Index 500 Fund
7.0
T. Rowe Price U.S. Large-Cap Core Fund
6.8
T. Rowe Price Limited Duration Inflation Focused Bond Fund
6.3
T. Rowe Price International Value Equity Fund
6.1
T. Rowe Price Overseas Stock Fund
5.5
T. Rowe Price International Stock Fund
4.9
T. Rowe Price Real Assets Fund
4.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless
C000169047  
Shareholder Report [Line Items]  
Fund Name Target 2040 Fund
Class Name I Class
Trading Symbol TRXRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Target 2040 Fund (the "fund") for the period of June 1, 2025 to May 31, 2026.
Additional Information [Text Block] You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
Material Fund Change Notice [Text Block]  
Additional Information Phone Number 1‑800‑638‑5660
Additional Information Email <span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
Additional Information Website www.troweprice.com/prospectus
Expenses [Text Block]

What were the fund costs for the last year? (based on a hypothetical $10,000 investment)

Table Summary
 
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Target 2040 Fund - I Class
$44
0.40%
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.40%
Factors Affecting Performance [Text Block]

What drove fund performance during the past 12 months?

  • Global stock indexes and fixed income markets generated strong returns for the 12 months ended May 31, 2026. Equities were supported by solid corporate earnings, enthusiasm for artificial intelligence and semiconductor-related investments, and periods of easing monetary policy as major central banks, including the Federal Reserve, reduced interest rates in late 2025. Despite volatility from shifting U.S. tariff policies and the U.S.-Iran conflict, markets recovered as ceasefire progress reduced energy-price pressures and improved investor sentiment, while fixed income benefited from declining yields, resilient credit markets, and easing geopolitical risks.

  • Compared with the style-specific S&P Target Date 2040 Index, security selection within the allocations to international developed and emerging equities added value, particularly within international developed core and value. Additionally, an overweight allocation to emerging markets equities, which strongly outpaced international developed markets, had a positive impact on relative results.

  • Conversely, security selection within some of the underlying portfolios detracted from relative results, including allocations to U.S. large-cap value, core, and growth stocks.

  • The fund seeks the highest total return over time consistent with an emphasis on both capital growth and income. The fund invests in a diversified portfolio of other T. Rowe Price stock and bond mutual funds that represent various asset classes and sectors. Its allocation among T. Rowe Price funds will change over time in relation to its target retirement date.

Performance Past Does Not Indicate Future [Text] The fund’s past performance is not a good predictor of the fund’s future performance.
Line Graph [Table Text Block]
A line chart as described in the following paragraph. 

I Class 1,310,221 
Regulatory Benchmark 2,043,802 
Strategy Benchmark 1,392,152
Table Summary
I Class
Regulatory Benchmark
Strategy Benchmark
2016
500,000
500,000
500,000
2016
520,499
522,241
518,762
2016
518,271
534,647
519,658
2017
550,828
575,993
552,000
2017
577,698
588,456
571,345
2017
596,692
606,127
587,038
2017
623,561
653,724
622,487
2018
633,066
669,441
631,117
2018
632,585
677,086
635,212
2018
648,436
728,858
657,378
2018
619,136
689,853
623,177
2019
641,933
703,243
639,764
2019
640,916
693,987
631,688
2019
671,945
738,405
658,553
2019
701,956
796,715
699,792
2020
681,545
751,784
663,466
2020
681,013
773,543
661,969
2020
761,352
896,730
738,469
2020
808,171
948,279
783,222
2021
862,640
1,017,369
834,045
2021
919,125
1,113,218
898,304
2021
953,675
1,193,037
929,791
2021
935,577
1,198,049
915,587
2022
894,050
1,142,441
890,084
2022
835,396
1,072,208
843,808
2022
796,673
1,034,579
802,978
2022
819,451
1,068,629
828,301
2023
817,218
1,050,213
833,722
2023
834,812
1,094,023
849,009
2023
878,494
1,187,255
894,755
2023
886,988
1,203,368
903,064
2024
961,418
1,350,596
978,772
2024
993,945
1,395,788
1,009,263
2024
1,044,612
1,497,655
1,068,666
2024
1,074,636
1,618,354
1,097,295
2025
1,071,241
1,587,401
1,096,468
2025
1,082,245
1,578,892
1,118,964
2025
1,148,914
1,734,883
1,199,145
2025
1,198,754
1,838,256
1,254,784
2026
1,266,891
1,857,519
1,323,496
2026
1,310,221
2,043,802
1,392,152
Average Annual Return [Table Text Block]
Table Summary
 
1 Year
5 Years
10 Years
Target 2040 Fund (I Class)
21.07%
7.35%
10.11%
Russell 3000 Index (Regulatory Benchmark)
29.45
12.92
15.12
S&P Target Date 2040 Index (Strategy Benchmark)
24.41
9.16
10.78
No Deduction of Taxes [Text Block] Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
Updated Performance Information Location [Text Block] Updated performance information can be found at www.troweprice.com.
Distribution of Capital [Text Block] The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
AssetsNet $ 448,394,000
Holdings Count | Holding 24
Advisory Fees Paid, Amount $ 2,049,000
InvestmentCompanyPortfolioTurnover 31.40%
Additional Fund Statistics Significance or Limits [Text Block]

What are some fund statistics?

Fund Statistics

  • Total Net Assets (000s)$448,394
  • Number of Portfolio Holdings24
Holdings [Text Block]
Table Summary
Domestic Equity Funds
51.6%
International Equity Funds
21.4
Domestic Bond Funds
18.8
International Bond Funds
7.0
Short-Term and Other
1.2
Largest Holdings [Text Block]
Table Summary
T. Rowe Price Growth Stock Fund
12.4%
T. Rowe Price Value Fund
12.2
T. Rowe Price New Income Fund
8.4
T. Rowe Price Equity Index 500 Fund
7.0
T. Rowe Price U.S. Large-Cap Core Fund
6.8
T. Rowe Price Limited Duration Inflation Focused Bond Fund
6.3
T. Rowe Price International Value Equity Fund
6.1
T. Rowe Price Overseas Stock Fund
5.5
T. Rowe Price International Stock Fund
4.9
T. Rowe Price Real Assets Fund
4.5
Material Fund Change [Text Block]
Updated Prospectus Web Address www.troweprice.com/paperless