v3.26.1
Fees and Expenses - T. Rowe Price New Income Fund, Inc.
Jul. 27, 2026
Prospectus [Line Items]  
Expense Heading [Optional Text] Fees and Expenses
Expense Narrative [Text Block]

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the fund. You may also incur brokerage commissions and other charges when buying or selling shares of the fund, which are not reflected in the table or example below.

 
Shareholder Fees Caption [Optional Text] Shareholder fees (fees paid directly from your investment)
Shareholder Fees [Table]
  Investor
Class		 I
Class		 Advisor
Class		 R
Class		 Z
Class
Shareholder fees (fees paid directly from your investment)  
Maximum account fee $20 a  —   —   —   —  
Operating Expenses Caption [Optional Text] Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
                     
Management fees  0.31 %  0.31 %  0.31 %  0.31 %  0.31 %
                       
Distribution and service (12b-1) fees   —     —    0.25    0.50     —  
                       
Other expenses  0.27    0.05    0.83    0.63    0.01  
                       
                       
Total annual fund operating expenses  0.58    0.36    1.39    1.44    0.32  
                       
Fee waiver/expense reimbursement  (0.14 )b   —    (0.47 )c  (0.36 )d  (0.32 )e
                       
                       
Total annual fund operating expenses after fee waiver/expense reimbursement  0.44 b   0.36    0.92 c   1.08 d  0.00 e 
Expense Footnotes [Text Block]
a Subject to certain exceptions and account minimums, accounts are charged an annual $20 fee.
b T. Rowe Price Associates, Inc., has contractually agreed (through July 31, 2027) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.44%. The agreement may only be terminated at any time after July 31, 2027, with approval by the fund’s Board of Directors. Fees waived and expenses paid under this agreement (and any applicable prior limitations) are subject to reimbursement to T. Rowe Price Associates, Inc., by the class whenever the class’ expense ratio is below 0.44%. However, the class will not reimburse T. Rowe Price Associates, Inc., more than three years from the date such amounts were initially waived or paid. The class may only reimburse T. Rowe Price Associates, Inc., if the reimbursement does not cause the class’ expense ratio (after the reimbursement is taken into account) to exceed the class’ current expense limitation (or the expense limitation in place at the time the amounts were waived or paid).
c T. Rowe Price Associates, Inc., has contractually agreed (through July 31, 2027) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 0.92%. The agreement may only be terminated at any time after July 31, 2027, with approval by the fund’s Board of Directors. Fees waived and expenses paid under this agreement (and any applicable prior limitations) are subject to reimbursement to T. Rowe Price Associates, Inc., by the class whenever the class’ expense ratio is below 0.92%. However, the class will not reimburse T. Rowe Price Associates, Inc., more than three years from the date such amounts were initially waived or paid. The class may only reimburse T. Rowe Price Associates, Inc., if the reimbursement does not cause the class’ expense ratio (after the reimbursement is taken into account) to exceed the class’ current expense limitation (or the expense limitation in place at the time the amounts were waived or paid).
d T. Rowe Price Associates, Inc., has contractually agreed (through July 31, 2027) to waive its fees and/or bear any expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) that would cause the class’ ratio of expenses to average daily net assets to exceed 1.08%. The agreement may only be terminated at any time after July 31, 2027, with approval by the fund’s Board of Directors. Fees waived and expenses paid under this agreement (and any applicable prior limitations) are subject to reimbursement to T. Rowe Price Associates, Inc., by the class whenever the class’ expense ratio is below 1.08%. However, the class will not reimburse T. Rowe Price Associates, Inc., more than three years from the date such amounts were initially waived or paid. The class may only reimburse T. Rowe Price Associates, Inc., if the reimbursement does not cause the class’ expense ratio (after the reimbursement is taken into account) to exceed the class’ current expense limitation (or the expense limitation in place at the time the amounts were waived or paid).
e T. Rowe Price Associates, Inc., has contractually agreed to waive and/or bear all the Z Class’ expenses (excluding interest; expenses related to borrowings, taxes, and brokerage; nonrecurring, extraordinary expenses; and acquired fund fees and expenses) in their entirety. T. Rowe Price Associates, Inc., expects this fee waiver and/or expense reimbursement arrangement to remain in place indefinitely, and the agreement may only be amended or terminated with approval by the fund’s Board of Directors.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that your investment has a 5% return each year, and that the fund’s operating expenses remain the same. The example also assumes that any current expense limitation arrangement remains in place for the period noted in the previous table; therefore, the figures have been adjusted to reflect fee waivers or expense reimbursements only in the periods for which the expense limitation arrangement is expected to continue. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

 
Expense Example, With Redemption [Table]
  1 Year 3 Years 5 Years 10 Years
 Investor Class $ 45 $ 172 $ 310 $ 712
 I Class   37   116   202   456
 Advisor Class   94   394   716   1,628
 R Class   110   420   753   1,693
 Z Class   0   0   0   0

 
Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block]

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 146.4% of the average value of its portfolio.

  
Portfolio Turnover, Rate 146.40%