The PAYE repayment plan: how the formula works, and what it caps

Pay As You Earn ties your federal student loan payment to your income instead of your balance. The mechanics are stable even though the exact percentages have moved with rule changes and litigation, so this guide explains how the plan works and tells you where to confirm the live numbers.

Written by the MetriqaHub Editorial Team. Figures and rules checked against the sources below on 2026-08-13.

How Pay As You Earn sets your monthly payment

PAYE is one of several income-driven repayment plans for federal Direct Loans. Instead of charging a fixed amount over a fixed term the way the Standard 10-year plan does, it calculates a payment from what you actually earn and how large your household is, and it recalculates that payment every year when you recertify your income.

The formula itself has a simple shape: your servicer works out a figure called discretionary income, applies a percentage to it, and divides by twelve to get a monthly payment. PAYE has historically set that percentage at 10 percent of discretionary income, but this is exactly the kind of parameter that has been amended and challenged in court more than once. Treat any percentage you read, including this one, as historical until you confirm it against your own account at studentaid.gov.

What counts as discretionary income

Discretionary income is your adjusted gross income minus a multiple of the federal poverty guideline for your family size and state of residence. Family size generally follows the dependents you claim on your taxes, and the poverty guideline itself is republished by the Department of Health and Human Services every year, so the dollar figure moves annually even when the underlying rule does not change.

The multiple applied to the poverty guideline is a separate policy lever from the payment percentage, and PAYE has historically used 150 percent of the guideline. That number, like the percentage, has been a target of rule changes and litigation, and different income-driven plans have used different multiples at different times. The only reliable way to see the current multiple applied to your own numbers is the loan simulator at studentaid.gov, not a remembered figure from an older article.

The partial financial hardship test you have to clear to enroll

PAYE is not open simply because you want a lower payment. To enroll you have to show a partial financial hardship, meaning the payment the PAYE formula produces for you has to come out lower than what you would owe on the Standard 10-year plan for your current balance. That comparison is checked at enrollment and again each year you recertify.

This hardship gate is a structural feature of PAYE and of IBR, and it is one of the things that distinguished PAYE from REPAYE, which historically did not require it. Whether PAYE itself remains open to new enrollment is a separate question from how the formula works, and it is one of the things that has moved with recent legislation and litigation, so confirm current enrollment status at studentaid.gov before assuming you can apply.

The hardship test is checked again each time you recertify, not just at the original application. If your income rises enough that the PAYE formula would produce a payment above what Standard would have charged, your servicer stops applying the income-based number and moves you to the fixed Standard amount instead. That is the practical meaning of the cap described in the next section, and it is why the hardship test and the payment cap are really two views of the same rule rather than two separate features.

Why the payment cannot rise above the Standard Plan amount

Because entry to PAYE requires the hardship test, the plan carries a structural cap: your PAYE payment is never asked to exceed what the Standard 10-year plan would have charged on the balance you carried when you entered repayment. As your income rises, your PAYE payment rises with it under the formula, but it stops climbing once it reaches that ceiling, even if your income and the formula would otherwise push it higher.

That cap is the main practical difference from income-driven plans that do not include one. A borrower whose income grows quickly after enrolling in PAYE gets real protection from an ever-rising bill. The trade is the hardship test at entry and the fact that a plan with a cap does not always come out cheaper than an uncapped plan in the years before you would have hit it.

The cap is calculated once, against the balance and rate you had at the point you entered repayment, not recalculated against your current balance every year. That matters if you have been on PAYE for a while and your original balance has shrunk through payments: the ceiling stays anchored to the original numbers, so it is worth asking your servicer directly what dollar figure your personal cap works out to rather than assuming it moves with your current balance.

Forgiveness timing and the tax bill on what's forgiven

PAYE, like the other income-driven plans, forgives whatever principal and interest remains after a set count of qualifying monthly payments. The exact count and the definition of a qualifying payment are program rules that have been amended and litigated repeatedly. Treat any specific number of years you see, including a commonly cited round figure, as historical rather than confirmed current fact, and check your own servicer account and studentaid.gov for the count that applies to your loans.

The tax treatment of the forgiven balance has moved even more than the timeline. Cancelled federal debt has historically been treated as taxable income in the year it's forgiven, then a period of federal tax-free treatment applied under separate legislation, and the expiration of that treatment and how individual states tax forgiven debt have both been genuine sources of confusion. Do not assume forgiveness will be tax-free. Verify current federal treatment at irs.gov and check your state revenue department separately, since federal and state rules do not always match.

How PAYE compares with REPAYE, IBR, ICR and newer plans

The federal income-driven plans differ along a handful of stable axes even when the exact numbers on each axis move: the percentage of discretionary income charged, the poverty guideline multiple used to define that income, whether a hardship test gates entry, and whether the payment is capped. PAYE's particular combination, a hardship test plus a cap, puts it closest in structure to IBR and furthest from plans that were designed without either feature.

Plan availability itself has changed more than once in the past few years amid litigation and legislation, with some plans closed to new enrollment or replaced by newer options at different points. The only reliable way to know what is open to you today, and the exact numbers attached to it, is the loan simulator and your own account at studentaid.gov, not this guide or any other page written before the most recent change.

Frequently asked questions

Is PAYE still open to new borrowers?
Plan availability has changed more than once amid litigation and recent legislative changes, and some income-driven plans have been closed to new enrollment at different points. Check current enrollment status for PAYE at studentaid.gov before assuming you can apply.
How is the PAYE payment different from IBR?
Both use a percentage of discretionary income and both require the partial financial hardship test at entry. The two plans have historically used different percentages and, for borrowers on the older IBR track, a different poverty guideline multiple, so the dollar payments can diverge even for identical income.
Does PAYE cap my payment as my income keeps growing?
Yes, structurally. Your PAYE payment is never asked to exceed what the Standard 10-year plan would have charged on the balance you carried when you entered repayment, which is a direct consequence of the hardship test required to enroll.
Will I owe tax on the amount forgiven at the end of PAYE?
It depends on the federal and state tax law in effect the year your balance is forgiven, and that treatment has changed before through separate legislation. Confirm current federal treatment at irs.gov and check your state revenue department, since the two do not always match.
What happens if I don't recertify my income every year?
Your servicer generally moves you off the income-calculated payment onto an alternative amount that is not based on your current income, which is usually higher. The specifics of that fallback payment are worth confirming directly with your servicer and at studentaid.gov.
Can I switch from PAYE to another income-driven plan later?
Generally you can request a change, but each plan has its own entry conditions, and switching does not always carry your qualifying payment count over one for one. Check how a switch would affect your progress toward forgiveness before you request it.

Sources

Related guides

This guide is general information, not financial advice. Lending rules, tax treatment and programme terms change, and they vary by lender and by state. Confirm anything that affects a decision with the sources listed above or a licensed professional before acting on it.