How Income-Driven Plans Calculate Your Payment

Income-driven repayment plans tie your monthly payment to your actual income rather than the amount you owe. The federal government offers four plans — Revised Pay As You Earn (REPAYE), Pay As You Earn (PAYE), Income-Based Repayment (IBR), and Income-Contingent Repayment (ICR) — and each uses a different formula to decide what you pay each month.

All four plans start by calculating your discretionary income, which is your adjusted gross income minus 150 percent of the federal poverty line for your household size and state. If that number is zero or negative, your payment becomes zero. The plans then take a percentage of that discretionary income — ranging from 10 percent to 20 percent depending on which plan you choose — and that becomes your monthly bill.

Because the poverty line is set by the Department of Health and Human Services and updated each year, and because your income changes, your payment can drop to zero if your earnings fall below the threshold or if you have dependents that raise your household's poverty line. You recertify your income once per year, and your payment adjusts based on what you report.

Key Takeaways

  • Income-driven plans calculate your payment as a percentage of discretionary income — the amount left after subtracting 150 percent of the poverty line from your adjusted gross income.
  • If your discretionary income is zero or negative, your monthly payment becomes zero, though you still owe the loan and interest continues to accrue.
  • REPAYE offers the lowest payment percentage (10 percent of discretionary income) and is available to most borrowers, while PAYE and IBR have income caps or loan-type restrictions.
  • You must recertify your income once per year by submitting tax documents or other proof to the loan servicer, or your payment will jump to a standard 10-year repayment amount.
  • After 20 to 25 years of payments on an income-driven plan, any remaining balance is forgiven, though forgiveness may be taxable as income.

Which Income-Driven Plan Offers the Lowest Payment

REPAYE (Revised Pay As You Earn) sets your payment at 10 percent of discretionary income and is open to borrowers with any federal loan type and any income level. It is the most widely available plan and typically produces the lowest monthly payment of the four options.

PAYE (Pay As You Earn) also uses 10 percent of discretionary income but has two restrictions: you must have taken out your first loan on or after October 1, 2007, and you must have received a disbursement on or after October 1, 2011. If you meet those dates, PAYE and REPAYE will calculate the same payment.

IBR (Income-Based Repayment) uses 10 or 15 percent of discretionary income depending on when you took out your loans, and ICR (Income-Contingent Repayment) uses 20 percent. Both produce higher payments than REPAYE or PAYE. If you are not may be able to access for REPAYE or PAYE, IBR is usually the next best option.

When Your Payment Drops to Zero

Your payment becomes zero when your discretionary income is zero or less. This happens when your adjusted gross income falls below 150 percent of the federal poverty line for your household size and state. For 2024, the poverty line for a single person is roughly $14,580 annually, so 150 percent is about $21,870. If you earn less than that, your discretionary income is zero and your payment is zero.

The threshold is higher for larger households. A family of four has a 2024 poverty line of about $30,000, making 150 percent roughly $45,000. If your household income is below that, your payment is zero. These figures change each year when the Department of Health and Human Services updates the poverty line, usually in January.

Even when your payment is zero, interest still accrues on your loan. On REPAYE, the government covers half of the unpaid interest each month, so your balance grows more slowly. On other income-driven plans, unpaid interest is added to your balance in full. This is why zero-payment periods can extend your repayment timeline and increase the total amount you ultimately owe.

How to Enroll and Recertify Your Income

You enroll in an income-driven plan through your loan servicer's website or by calling them directly. The servicer is the company that collects your payments — usually Nelnet, Mohela, Aidvantage, or Heartland ECSI. You will need to provide your adjusted gross income, household size, and state of residence. Most servicers let you submit this information online.

Once enrolled, you must recertify your income once per year. The servicer will send you a notice asking you to update your information. You can recertify by submitting a recent tax return, a W-2, a pay stub, or a signed statement of income if you are self-employed or have no income. The servicer will then recalculate your payment based on the new figures.

If you do not recertify by the important date, your payment will jump to a standard 10-year repayment amount, which is usually much higher than your income-driven payment. Missing recertification is one of the most common reasons borrowers fall behind. Set a calendar reminder for the recertification important date each year, or ask your servicer if they can pull your income directly from the IRS.

What Happens After 20 or 25 Years of Payments

After you have made payments on an income-driven plan for 20 years (for undergraduate loans) or 25 years (for graduate loans or a mix of both), any remaining balance is forgiven. You do not have to explore for forgiveness — the servicer tracks your payment count and forgives the balance automatically when you reach the threshold.

The forgiven amount may be treated as taxable income by the IRS. If you have a $100,000 balance forgiven, the IRS may send you a 1099-C form and expect you to report that as income on your tax return. This could result in a large tax bill in the year of forgiveness. Some states do not tax forgiven student loan debt, but federal tax treatment is not yet settled for all borrowers, so you should consult a tax professional before relying on forgiveness as your repayment strategy.

The Public Service Loan Forgiveness program offers a faster path — forgiveness after 10 years of payments — but only for borrowers who work in government or nonprofit jobs and make payments under an income-driven plan while employed in that role. If you do not work in public service, the 20- or 25-year timeline is your forgiveness window.

How Income-Driven Plans Compare to Standard Repayment

Under standard repayment, you pay a fixed amount each month for 10 years, regardless of your income. The payment is calculated to pay off the loan in that time. For a $30,000 loan at 6 percent interest, the standard payment is roughly $333 per month.

On an income-driven plan, if your discretionary income is low, your payment might be $50 or $100 per month — or zero. You pay less each month, but you pay for longer. The same $30,000 loan might take 20 to 25 years to repay, and you will pay more in total interest because the loan sits longer. However, if your income never rises significantly, the income-driven plan saves you money because you pay less overall than you would under standard repayment.

The trade-off is time and total interest versus monthly affordability. If you can afford the standard payment, you will owe less money in the long run. If you cannot, an income-driven plan keeps your payment manageable and may lead to forgiveness if your income does not increase enough to pay off the loan within 20 to 25 years.

Frequently Asked Questions

Can I have a zero payment if I am married and file taxes jointly?

Yes, but only if your combined household income is low enough. Income-driven plans use your adjusted gross income from your tax return, so if you file jointly, the servicer uses your combined income. If you file separately, the servicer uses only your income. Filing separately can lower your payment but disqualifies you from PAYE and may affect other benefits, so consult a tax professional before changing your filing status.

What happens to my zero-payment period when I get a raise?

Your payment will increase when you recertify your income the following year. If your new income is above 150 percent of the poverty line, your discretionary income becomes positive and your payment rises. You will owe the difference between what you paid (zero) and what you should have paid, but the servicer does not retroactively bill you — your new payment straightforward reflects the new income going forward.

Do I lose my zero payment if I move to a different state?

No. The poverty line is adjusted for state of residence, but moving does not automatically change your payment. When you recertify your income, you will report your new state, and the servicer will recalculate using that state's poverty line. In most cases, the difference is small, but it is worth noting when you move.

Can I switch between income-driven plans if my situation changes?

Yes. You can change plans at any time by contacting your servicer. If you switch from one plan to another, your payment will recalculate under the new plan's formula. Some borrowers switch to REPAYE because it offers the lowest percentage and covers half of unpaid interest, while others switch away if their income rises and they want to pay off the loan faster.

Does a zero payment count toward Public Service Loan Forgiveness?

Yes. Months with a zero payment count as may have access to payments under PSLF as long as you are employed in a may have access to public service job and enrolled in an income-driven plan. You do not have to make a payment for it to count, which is why PSLF borrowers with low incomes often have zero payments while still building toward the 120 payments needed for forgiveness.