Student Loan Payment Calculator 2026-27: What $20K, $40K, $60K and $100K Cost Per Month (Standard vs RAP)

Every borrower asks the same question in a slightly different form: what does this balance actually cost me each month? The answer changed on July 1, 2026. New federal loans carry new fixed rates, the old menu of repayment plans was replaced by two options, and one of those options ignores your balance entirely and prices your payment off your tax return instead. This guide computes the numbers for the balances people actually carry so you can see the trade-offs before your first bill arrives.

The 2026-27 rates and the two plans that apply to new loans

Federal Student Aid set the fixed rates for loans first disbursed between July 1, 2026 and June 30, 2027 at 6.52% for undergraduate Direct Subsidized and Unsubsidized Loans, 8.07% for graduate and professional Direct Unsubsidized Loans, and 9.07% for Direct PLUS Loans. Those rates stay fixed for the life of each loan; next year's cohort will get its own rate.

The bigger change is structural. Under HEA section 455(d)(7), as amended by Public Law 119-21, a borrower whose loan is made on or after July 1, 2026 may choose only a standard repayment plan with a fixed payment over a period set by total principal, or the Repayment Assistance Plan under section 455(q). A borrower who makes no election is placed on Standard. The selection applies to all of that borrower's Direct Loans, including older ones. Graduated, extended, and the legacy income-driven plans are not offered for these loans, and the income-contingent plans (PAYE and ICR) sunset for everyone on July 1, 2028. For the full plan-by-plan picture, see our repayment plan comparison and income-driven repayment guide.

Table 1: Monthly payment by balance, 10-year vs. tiered Standard

The left columns show the classic 10-year schedule, which is still the benchmark for “how much does this loan really cost.” The right columns show what happens when the tiered Standard plan stretches the same balance over 15, 20, or 25 years. Total interest is listed as 10-year / tiered.

Computed with payment = P × i ÷ (1 − (1 + i)⁻ⁿ), i = annual rate ÷ 12, rounded to the dollar. Tier assignment uses total outstanding principal at the time you enter repayment. Figures exclude origination fees and assume no capitalized in-school interest.

Read the interest columns before you celebrate a lower payment. A $50,000 graduate balance at 8.07% costs $608 a month over 10 years and $23,019 in interest; the 20-year tier drops the payment to $420 but the interest bill rises to $50,896, more than the original loan. At $100,000 the 25-year tier turns $46,037 of interest into $132,938. The plan lets you prepay without penalty, so a sensible pattern is to take the tier for flexibility and pay at the 10-year pace whenever your budget allows. The strategies in how to pay off student loans fast show what each extra $100 does to the timeline.

Direct PLUS at 9.07%

From July 1, 2026 PLUS loans are available only to parents of dependent undergraduates, capped at $20,000 per year and $65,000 per student. Graduate and professional students lost PLUS access entirely; our guide to funding grad school after Grad PLUS ended works through the new caps and the alternatives.

Table 2: RAP monthly payment by income

RAP does not look at your balance. The statute defines an applicable base payment as a percentage of adjusted gross income that rises one point for every $10,000 band: 1% of AGI between $10,001 and $20,000, 2% between $20,001 and $30,000, and so on up to 10% above $100,000. At or below $10,000 of AGI the base is a flat $120 a year. The monthly payment is the base divided by 12, minus $50 for each dependent you claim, never lower than $10. A married borrower who files separately is assessed on their own AGI only.

Monthly = (rate × AGI ÷ 12) − ($50 × dependents), minimum $10. Example: $80,000 × 7% = $5,600 ÷ 12 = $467; with one dependent, $417. Statutory formula from HEA §455(q)(4)(B); the Department verifies income annually.

Two features make RAP different from the plans it replaces. First, there is no payment cap at the Standard amount, so a high earner with a small balance can pay more under RAP than under Standard; at $150,000 AGI the RAP payment is $1,250 a month, which exceeds the 10-year payment on any balance under about $110,000 at 6.52%. Second, forgiveness arrives only after 360 qualifying monthly payments, thirty years, rather than the 20 or 25 years of the older plans. RAP is built for borrowers whose balance is large relative to income; it is a poor fit for someone who can comfortably clear the debt in ten years.

Table 3: Does the RAP payment cover the interest?

Interest accrues daily on the outstanding principal. On a monthly basis, a $40,000 balance at 6.52% generates about $217 of interest; at the graduate rate of 8.07% it is $269. Compare those to the RAP payments in Table 2 and you can see the income at which a borrower starts paying down principal.

Monthly interest = balance × annual rate ÷ 12, no dependents assumed. AGI thresholds refer to the $10,000 bands in Table 2.

When the payment falls short, the statute's balance assistance for distressed borrowers rules take over. Under section 455(q)(2)(A), for each month you make the on-time applicable payment and it is insufficient to cover that month's interest, the unpaid interest “shall not be charged to the borrower.” Under 455(q)(2)(B), if your payment reduces principal by less than $50, the Department reduces principal by the difference, up to the lesser of $50 or the amount you paid. A borrower with $60,000 at 8.07% and $40,000 AGI pays $100 a month, is charged none of the roughly $304 of interest that goes unpaid, and sees principal fall by $50. The balance shrinks slowly, but it shrinks.

Table 4: Payment as a share of gross income

A common planning rule of thumb keeps student loan payments under roughly 8 to 10 percent of gross income, and total debt payments under 20 percent. The table applies the 10-year undergraduate payment from Table 1 to four salary levels. It is a screening tool, not a lender formula.

Share = monthly payment ÷ (annual salary ÷ 12). Gross, pre-tax income; a take-home comparison would be higher.

The pattern is the one borrowers feel intuitively: $20,000 is manageable on almost any full-time salary, $40,000 is comfortable above roughly $55,000, and $100,000 at 6.52% exceeds a fifth of gross pay until income passes about $70,000, which is why six-figure balances are where RAP or the 25-year tier become the realistic path rather than the fallback.

How to run your own numbers

1. Pull your loan list from StudentAid.gov. Note each loan's disbursement date, rate, and balance. Loans disbursed before July 1, 2026 keep their original rates and, for now, their plan options; loans disbursed after that date are on the two-plan system.
2. Model the Standard tier. Enter your total principal in the student loan calculator with the term the tier assigns (10, 15, 20, or 25 years) and compare the total interest to the 10-year figure. Then rerun with the 10-year payment to see what prepaying saves.
3. Model RAP from your AGI. Use the last tax return you filed: rate band × AGI ÷ 12, minus $50 per dependent. Check whether that covers the monthly interest (balance × rate ÷ 12). If it does not, the interest waiver applies and your balance still falls by at least $50 a month while you pay on time.
4. Test extra payments. The loan repayment calculator shows the payoff date and interest saved for any added monthly amount; on $40,000 at 6.52%, an extra $200 a month cuts 10 years to about 6 years 3 months and saves roughly $5,800.
5. Confirm with the official simulator. Federal Student Aid's Loan Simulator applies your actual loan data and plan eligibility; treat this page as the explainer and the simulator as the final check before you elect a plan.

Which plan fits which borrower

Whichever plan you pick, the arithmetic in Table 1 does not change: interest is a function of balance, rate, and time. Lower payments buy time and cost interest; higher payments cost cash flow and save interest. The right plan is the one that keeps you current through the worst year of your repayment period. For the full rate history and what drives next year's reset, see federal student loan interest rates.

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