💡 Extra Payment Savings
See how much faster you can eliminate your student debt with additional monthly payments.
| Interest Saved | New Payoff | Time Saved | New Monthly | Original Monthly |
|---|---|---|---|---|
| $1,451.25 | 8y 10m | 1y 2m | $375.38 | $341.25 |
| total interest saved | vs 10-yr term | off your payoff | with +$34.13/mo extra | standard plan |
Repayment Plan Comparison
Compare how each federal student loan repayment plan affects your monthly payment, total cost, and payoff timeline for a $30,000 balance at 6.54% interest.
| Plan | Starting Payment | Payoff Period | Est. Total Paid | Est. Total Interest | Forgiveness? |
|---|---|---|---|---|---|
| Standard ← selected | $341.25/mo | 10y 0m | $40,951 | $10,951 | No |
| Graduated | $238.88/mo | 10y 0m | $37,265 | $7,265 | No |
| Extended (25-yr) | $203.31/mo | 25y 0m | $60,994 | $30,994 | No |
| IBR | $270.08/mo | 25y 0m | $81,025 | $51,025 | After 25 yrs |
| PAYE | $270.08/mo | 20y 0m | $64,820 | $34,820 | After 20 yrs |
| SAVE | $87.98/mo | 25y 0m | $26,394 | $0 | After 25 yrs * |
* SAVE forgiveness: undergrad borrowers may qualify for forgiveness after 20 years. Graduate portions after 25 years. Forgiven amounts may be taxable depending on future legislation.
Standard Repayment Schedule
How your balance, interest, and principal change each year on the standard 10-year plan.
| Year | Principal Paid | Interest Paid | Total Payment | Remaining Balance |
|---|---|---|---|---|
| Year 1 | $2,198.17 | $1,896.89 | $4,095.06 | $27,802 |
| Year 2 | $2,346.32 | $1,748.74 | $4,095.06 | $25,456 |
| Year 3 | $2,504.45 | $1,590.60 | $4,095.06 | $22,951 |
| Year 4 | $2,673.25 | $1,421.81 | $4,095.06 | $20,278 |
| Year 5 | $2,853.41 | $1,241.64 | $4,095.06 | $17,424 |
| Year 6 | $3,045.72 | $1,049.33 | $4,095.06 | $14,379 |
| Year 7 | $3,250.99 | $844.06 | $4,095.06 | $11,128 |
| Year 8 | $3,470.10 | $624.96 | $4,095.06 | $7,658 |
| Year 9 | $3,703.97 | $391.09 | $4,095.06 | $3,954 |
| Year 10 | $3,953.61 | $141.45 | $4,095.06 | $0 |
| Total | $30,000.00 | $10,950.58 | $40,950.58 | $0.00 |
Understanding Student Loan Repayment
Student loan debt is one of the most significant financial obligations millions of Americans carry — and knowing exactly how that debt works is the first step toward eliminating it efficiently. A student loan repayment calculator translates abstract loan numbers into a concrete monthly budget line and a firm payoff date, giving you the clarity to make smart decisions before, during, and after your repayment period begins.
Whether you hold federal Direct Loans, Grad PLUS Loans, Perkins Loans, or private educational loan debt, the mechanics are the same: each monthly payment covers accrued interest first, then reduces your principal balance. Early in repayment, the lion's share of every dollar goes to interest — our amortization schedule above shows exactly how that ratio shifts in your favor over time.
How Federal Repayment Plans Differ
Federal student loan borrowers can choose from several repayment structures, each with meaningfully different monthly costs and long-term implications. A reliable student loan repayment planner should model all of them so you can compare apples to apples:
- Standard Plan (10 years): Fixed equal payments over 10 years. The fastest path to debt freedom and the least interest paid — but the highest monthly payment. Ideal if your budget allows it.
- Graduated Plan (10 years): Payments start lower and increase every two years, matching the income growth borrowers typically experience early in their careers. Total interest paid is higher than standard.
- Extended Plan (up to 25 years): Available to borrowers with more than $30,000 in Direct Loan debt. Significantly lower monthly payments, but considerably more interest over the life of the loan.
- Income-Based Repayment (IBR): Caps payments at 10% of discretionary income (for borrowers who entered repayment after July 1, 2014). Remaining balance forgiven after 25 years of qualifying payments.
- Pay As You Earn (PAYE): Caps payments at 10% of discretionary income; forgiveness after 20 years. Must demonstrate financial hardship to qualify.
- SAVE Plan: The most borrower-friendly income-driven plan as of 2025. Caps payments at 5% of discretionary income on undergraduate loans (10% for graduate). Uses a higher income exemption threshold — 225% of the poverty line versus 150%.
Student Loan Repayment Calculator Based on Income
Income-driven repayment (IDR) plans make your student loan repayment calculator based on income a uniquely powerful tool. Unlike fixed-payment plans where only your loan balance and rate matter, IDR payments depend on your adjusted gross income (AGI) and household size. Our calculator uses the current federal poverty guidelines to estimate your discretionary income and applies the correct percentage for each plan.
This is particularly valuable if you anticipate Public Service Loan Forgiveness (PSLF): under PSLF, federal employees and nonprofit workers who make 120 qualifying payments while enrolled in an IDR plan can have their remaining balance forgiven — entirely tax-free. Because lower IDR payments slow principal paydown, the higher your forgiven balance, the greater the PSLF benefit. Modeling this with a student loan repayment planner before committing to a plan can save tens of thousands of dollars.
How to Use This Student Loan Repayment Calculator
Getting an accurate estimate takes under two minutes:
- Select your repayment plan from the tabs — Standard, Graduated, Extended, IBR, PAYE, or SAVE.
- Enter your current loan balance. If you have multiple loans, enter the combined total for a consolidated view, or run the calculator separately for each.
- Enter your weighted average interest rate. (Servicers provide this; you can also calculate it by dividing your total annual interest charge by your total balance.)
- Choose your repayment term. This is 10 years for Standard, up to 25 for Extended, and up to 25 years for most IDR plans.
- For income-driven plans, enter your annual gross income and family size — these determine your monthly payment cap.
- Click Calculate Repayment to see your monthly payment, total interest, full amortization schedule, and plan comparison table.
- Use the Extra Payment Savings tool to see how even small additional payments — say $50 or $100 per month — can dramatically cut your payoff time and total interest.
The True Cost of Student Loan Interest
Interest on student loans accrues daily. For an unsubsidized Direct Loan at 6.54% — the 2024–25 rate for undergraduates — a $30,000 balance accrues about $5.38 in interest every day. Over a standard 10-year plan, that same borrower pays roughly $10,900 in total interest in addition to the principal. Extend the term to 25 years and the interest bill climbs to nearly $29,000 — almost as much as the original loan. Our educational loan repayment amortization schedule makes this cost visible, year by year and month by month, so it never sneaks up on you.
Extra Payments: The Fastest Path to Debt Freedom
No feature of a student loan repayment planner is more actionable than the extra payment calculator. Because student loan interest compounds on your outstanding balance, every dollar of extra principal you pay today saves more than a dollar in total interest over the remaining term. Our calculator shows the precise time saved and interest avoided — giving you a concrete return-on-investment figure for any additional payment you can manage.
Even modest extra payments have outsized impact. On a $30,000 loan at 6.54%, adding just $75 per month cuts repayment from 10 years to under 8 years and saves more than $1,600 in interest. Add $200 per month and you're debt-free in about 6.5 years while saving over $3,000.
Federal vs. Private Student Loans
Federal student loans come with built-in protections — income-driven repayment plans, deferment, forbearance, forgiveness programs, and fixed rates set by Congress. Private student loans, issued by banks and credit unions, may carry variable rates, fewer hardship protections, and no forgiveness options. Use the Standard or Extended plan in this calculator for private loans; the income-driven options apply exclusively to federal Direct Loans.
Refinancing Your Student Loans
Refinancing replaces one or more student loans with a new private loan, ideally at a lower interest rate. It can make sense if you have strong credit, stable income, and private loans at high rates — or if you have federal loans you're confident you won't need income-driven repayment or forgiveness for. The trade-off: refinancing federal loans into a private loan permanently removes federal protections. Run the numbers in our calculator before and after a hypothetical refinance rate to see the monthly savings and total interest reduction.
Frequently Asked Questions — Student Loan Repayment
Enter your loan balance, interest rate, repayment term, and — for income-driven plans — your annual income and family size. The calculator applies the standard amortization formula for fixed plans and federal discretionary income formulas for IBR, PAYE, and SAVE. It then generates your monthly payment, total interest, payoff timeline, and a full amortization schedule showing every payment over the life of the loan.
All three are federal income-driven repayment (IDR) plans that cap your monthly payment as a percentage of discretionary income. IBR for new borrowers caps payments at 10% of discretionary income (income above 150% of the federal poverty line) with forgiveness after 25 years. PAYE also caps at 10% but forgives after 20 years and requires demonstrated financial hardship. SAVE is the newest and most generous plan — it uses a higher income exemption (225% of poverty line) and caps undergraduate loan payments at just 5% of discretionary income, with forgiveness after 20–25 years depending on loan type.
Yes. Select IBR, PAYE, or SAVE from the Repayment Plan tabs, then enter your annual gross income and family size. The calculator uses current federal poverty guidelines to estimate your discretionary income and applies the correct payment percentage for the selected plan. This gives you an accurate monthly payment estimate that reflects how federal income-driven repayment actually works.
Extra payments go entirely to principal reduction, which lowers the balance on which interest accrues — creating a compounding savings effect. Use the Extra Payment Savings section to see the exact interest saved and months cut from your term for any extra amount. On a $30,000 loan at 6.54%, an extra $100 per month saves over $2,300 in interest and knocks roughly 2 years off the repayment period.
Extending your term reduces monthly cash flow pressure but significantly increases total interest paid. A $30,000 loan at 6.54% costs about $10,900 in interest on the standard 10-year plan; extend to 25 years and that figure rises to nearly $29,000. If budget constraints make the standard payment unworkable, a longer term is better than defaulting — but use the Extra Payment tool to pay down principal aggressively whenever you can afford to.
PSLF forgives the remaining balance of Direct Loans for borrowers who work full-time for a qualifying government or nonprofit employer and make 120 qualifying monthly payments under an income-driven repayment plan. Payments do not need to be consecutive. Crucially, PSLF forgiveness is currently tax-free under federal law. Because IDR plans often result in low monthly payments — especially early in your career — PSLF can generate six-figure forgiveness for borrowers with high debt relative to income.
All federal Direct Loan borrowers are eligible for SAVE, IBR (new version), and, with a partial financial hardship, PAYE. Parent PLUS Loans are not eligible for IBR, PAYE, or SAVE directly — they can only access ICR (Income-Contingent Repayment) after consolidation into a Direct Consolidation Loan. Private student loans do not qualify for any federal IDR plan.
Log in to StudentAid.gov to see all your federal loan balances, servicers, interest rates, and repayment status in one place. For private loans, log in to your private lender or servicer's portal. If you have multiple loans with different rates, you can run this calculator separately for each loan or enter a weighted average rate for a consolidated view.