What Is Income-Driven Repayment?
Income-driven repayment (IDR) plans are federal student loan repayment options that set monthly payments based on the borrower's discretionary income rather than the loan balance. The four plans — SAVE (formerly REPAYE), IBR, PAYE, and ICR — cap payments at 5-20% of discretionary income and forgive remaining balances after 20-25 years of qualifying payments. IDR enrollment is the primary mechanism for avoiding default after the 2024 payment restart.
Key Facts
- Over 11 million federal student loan borrowers are enrolled in income-driven repayment plans — roughly 25% of all borrowers in repayment, with enrollment surging after the October 2024 payment restart
- The SAVE plan (Saving on a Valuable Education) caps undergraduate loan payments at 5% of discretionary income — the lowest payment cap in IDR history, down from 10% under older plans like IBR
- IDR payments can be as low as $0 per month for borrowers earning below 225% of the federal poverty line (approximately $33,975 for a single individual in 2025), preventing default without requiring payment
- After 20 years of qualifying payments on undergraduate loans (25 years for graduate loans), the remaining balance is forgiven — but forgiven amounts may be taxable income after 2025 when the temporary tax exclusion expires
- Negative amortization is common under IDR: when payments are less than accruing interest, the loan balance grows over time, with some borrowers owing more after 10 years of payments than they originally borrowed
What Are the Four IDR Plans?
Each plan has different eligibility rules, payment formulas, and forgiveness timelines:
- SAVE (Saving on a Valuable Education): Replaced REPAYE in 2024. Payments at 5% of discretionary income for undergrad loans (10% for grad). No interest capitalization. $0 payments when income is below 225% FPL. Forgiveness after 20/25 years. Available to all Direct Loan borrowers regardless of when they borrowed.
- IBR (Income-Based Repayment): Payments at 10% of discretionary income (15% for pre-July 2014 borrowers). Forgiveness after 20 or 25 years. Must demonstrate partial financial hardship to enroll.
- PAYE (Pay As You Earn): Payments at 10% of discretionary income. Forgiveness after 20 years. Only available to new borrowers as of October 2007 who received a disbursement after October 2011.
- ICR (Income-Contingent Repayment): Payments at 20% of discretionary income or the amount on a 12-year fixed plan adjusted for income, whichever is less. Forgiveness after 25 years. The only IDR plan available for Parent PLUS loans (through consolidation).
How Is the Payment Calculated?
All IDR plans use the same basic formula:
- Start with adjusted gross income (AGI) from the most recent tax return.
- Subtract the poverty line threshold: 150% of FPL for IBR/PAYE/ICR, 225% for SAVE. For a single borrower in 2025, that's approximately $22,650 (150%) or $33,975 (225%).
- The result is discretionary income. Multiply by the plan's percentage (5-20%).
- Divide by 12 for the monthly payment.
Example: A single borrower earning $45,000 on the SAVE plan: ($45,000 − $33,975) × 5% ÷ 12 = approximately $46/month — regardless of whether they owe $30,000 or $100,000.
The Negative Amortization Problem
When IDR payments are less than the interest accruing on the loan, the balance grows. A borrower with $80,000 in graduate loans at 6.5% accrues $5,200/year in interest. If their IDR payment is $200/month ($2,400/year), $2,800 in unpaid interest is added to the balance each year. After 10 years, they may owe $108,000 on an original $80,000 loan — even while making every payment on time. The SAVE plan addresses this partially by preventing interest capitalization, but the growing balance creates psychological distress and financial risk if borrowers leave IDR.
How IDR Connects to the Default Crisis
IDR enrollment is the primary safety valve preventing mass student loan default after the payment restart. Borrowers who cannot afford standard payments but don't enroll in IDR risk sliding into delinquency and eventual default. The American Distress Index tracks this through its Debt Stress component — the 9.6% delinquency rate suggests millions of restart-eligible borrowers have not enrolled in IDR or are unable to navigate the enrollment process.
State-by-State Variations
IDR plans are federal programs with uniform national rules, but state tax treatment of forgiven student loan debt varies — a critical difference for borrowers approaching the 20-25 year forgiveness horizon.
| State | Key Difference |
|---|---|
| California | Conforms to federal tax exclusion for student loan forgiveness through 2025. State law AB 1589 excludes forgiven student loans from state income tax. |
| New York | Excludes forgiven student loan debt from state income tax. Also operates a state-level Get on Your Feet Loan Forgiveness Program for recent graduates earning under $50,000. |
| Mississippi | Taxes forgiven student loan debt as income at the state level, with rates up to 5%. Borrowers receiving IDR forgiveness may owe thousands in state taxes on the forgiven amount. |
| Indiana | Taxes forgiven student loan debt as state income. Combined with federal taxation (if the federal exclusion expires after 2025), borrowers could face significant tax bills on forgiveness. |
| North Carolina | Taxes forgiven student loan debt as state income at a flat 4.5% rate. A borrower with $50,000 forgiven could owe $2,250 in state taxes alone. |
Frequently Asked Questions
Which IDR plan has the lowest payments?
The SAVE plan has the lowest payments for undergraduate loans at 5% of discretionary income with a higher income protection threshold (225% of poverty line vs. 150%). For a single borrower earning $40,000, SAVE payments are approximately $25/month compared to $110/month under IBR.
Do I have to pay taxes on forgiven student loan debt?
Through December 2025, forgiven student loan debt is excluded from federal taxable income under the American Rescue Plan Act. After 2025, forgiven amounts may be taxable unless Congress extends the exclusion. State tax treatment varies — some states tax forgiven debt, others don't.
Can I switch between IDR plans?
Yes. You can switch IDR plans at any time by submitting a new application through your servicer or StudentAid.gov. Prior qualifying payments generally count toward forgiveness under the new plan. Switching may change your monthly payment amount and forgiveness timeline.
What happens if I don't recertify my income annually?
You must recertify income annually. If you miss the deadline, your payment reverts to the standard 10-year repayment amount, and any unpaid interest capitalizes (is added to principal). Under SAVE, interest does not capitalize at recertification — but payments still increase to the standard amount.
Does IDR count toward Public Service Loan Forgiveness?
Yes. Payments made under any IDR plan count toward PSLF's 120-payment requirement, as long as you work for a qualifying employer (government or 501(c)(3) nonprofit). PSLF forgiveness is tax-free at both federal and state levels, making it more valuable than standard IDR forgiveness.