You borrowed $80,000 for graduate school and now earn $45,000/year. The standard 10-year repayment plan wants $800+/month, which is 21% of your take-home—”financially crushing if you're trying to live on $45k. But the government offers income-driven repayment (IDR) plans that cap your payment at 10-15% of your 'discretionary income' (income above 150% of the federal poverty line). Under SAVE (Saving on a Valuable Education plan), your payment calculates to roughly $180/month—”less than a quarter of the standard plan. The catch: you stretch payments to 25 years (or longer for grad loans), and any remaining balance is forgiven. But that forgiveness counts as taxable income, triggering a large tax bill. A $80,000 loan forgiven after 25 years of payments means a $80,000 tax bill due at once.
IDR plans come in four flavors: SAVE (newest, lowest payments), PAYE (Pay-As-You-Earn), REPAYE (Revised PAYE), and IBR (Income-Based Repayment). SAVE is the current recommendation from the Department of Education, capping payments at 10% of discretionary income and offering some forgiveness benefits for balances under $12,000. PAYE and REPAYE cap at 10%, while IBR caps at 10-15%. The crucial detail: no IDR plan includes tax bomb mitigation. Borrowers often assume forgiveness is 'free money,' but the $80,000 forgiven becomes taxable income. Unless Congress changes the rules, that borrower faces a $20,000+ tax bill in year 26 when the forgiveness processes. Some borrowers argue the tax liability is worth paying $600/month less for 25 years, but it's a critical unknown in repayment planning.
This calculator estimates your monthly payment under SAVE, PAYE, REPAYE, and IBR, then projects your loan balance over time. Enter your income, loan balance, interest rate, and it shows which plan costs least, when your loan will be forgiven (if on an IDR plan), and the estimated forgiveness amount (to help you estimate potential tax liability). Test scenarios: 'If my income increases to $55,000, what's my new payment?' 'If I stay on standard repayment versus SAVE, what's the total cost?' IDR plans are transformative for low-income borrowers, but understanding the 25-year commitment and tax liability is essential before signing up.
The Three Main Income-Driven Plans
PAYE (Pay As You Earn): 10% of discretionary income, 20-year forgiveness, requires partial financial hardship. SAVE (Saving on A Valuable Education): 10% of discretionary income, 20-year forgiveness (25 for graduate loans), NEW (2023), doesn't require hardship certification. IBR (Income-Based Repayment): 10-15% depending on disbursement date, 20-25 year forgiveness. SAVE is newest and most borrower-friendly (prevents unpaid interest accrual for those in good standing).
Discretionary Income Calculation
Discretionary income is not your total income. It's Adjusted Gross Income (AGI) minus 150% of the federal poverty line for your family size. Example: ,000 AGI for a family of 1 (poverty line ,580) = AGI - (14,580 × 1.5) = ,000 - ,870 = ,130 discretionary income. Discretionary income of zero or near-zero results in payments (or minimal).
Why Income-Driven Plans Matter for Public Service Loan Forgiveness
Public Service Loan Forgiveness (PSLF) requires 10 years (120 payments) on an income-driven plan while working for government or nonprofit. After 10 years, remaining balance is forgiven tax-free. Teachers, social workers, nonprofit employees, and public sector workers should max out income-driven plans for PSLF. PSLF is more valuable than standard forgiveness (which takes 20-25 years).
Tax Implications and Forgiveness Uncertainty
Forgiven loan amounts are typically taxable income. However, through 2025, there's temporary tax forgiveness on student loan cancellation. Beyond 2025, forgiven amounts may trigger a tax bill (you're "forgiven" , that counts as taxable income, triggering -30k+ in taxes). Plan for this possibility: set aside funds or plan career/income to minimize tax impact year of forgiveness.
When to Choose Income-Driven Plans vs. Standard
Standard 10-year plan: pays off fastest, lowest interest. Income-driven plans: lower monthly payments if income is low. Choose income-driven if: you're in a low-paying field (teaching, social work, nonprofit, government work), pursuing PSLF, or have debt-to-income concerns. Choose Standard if you can afford it and want to minimize interest and total years of payments.