Student Loan Payoff Calculator
See your payoff date and total interest on the standard plan - then watch what an extra monthly payment or a one-time lump sum does to both. Small extra payments do surprisingly heavy lifting on a ten-year loan.
Your Loan
Multiple loans? Enter the combined balance and your average rate, or run each loan separately
Pay It Off Faster
A tax refund, bonus, or gift applied to principal
Your Payoff Plan
Making Extra Payments Count
- • Tell your servicer to apply extra payments to principal - some default to "advancing the due date" instead
- • With multiple loans, aim extra money at the highest-rate loan first (the avalanche method)
- • Capture any employer student-loan repayment benefit; it's free acceleration
- • Autopay usually earns a 0.25% rate discount on federal loans - take it
- • On income-driven plans aiming for forgiveness, extra payments may work against you - know your strategy first
Understanding Your Repayment Options
The Standard Plan Is Just the Default
Federal loans default to a 10-year fixed payment, which is what this calculator models. But federal borrowers have options: extended plans stretch to 25 years (lower payment, much more interest), and income-driven repayment plans set your payment as a percentage of discretionary income, with forgiveness of any remainder after 20-25 years of payments.
Those paths solve different problems. If the standard payment genuinely doesn't fit your budget, income-driven plans are the safety valve. If you can afford the standard payment and then some, acceleration - what this calculator shows - is usually the cheapest way out.
Why Extra Payments Punch Above Their Weight
Every extra dollar goes entirely to principal, and principal you eliminate today stops generating interest for the rest of the loan. On a $30,000 loan at 6.5%, an extra $100 a month cuts roughly three years and thousands of dollars of interest off a 10-year schedule - the earlier in the loan, the bigger the effect.
Lump sums work the same way: a $2,000 tax refund applied to principal in year one saves far more than the same $2,000 in year eight, because it has more years of interest left to cancel. Try it in the calculator - the difference is visible immediately.
Strategy Questions Worth Settling First
Pay Off Loans or Invest?
Paying a loan early is a guaranteed return equal to its interest rate. Below roughly 5%, long-term investing has historically beaten that; above 7%, the guaranteed win gets compelling. In between is personal preference. Two things come first regardless: any employer 401(k) match, and a starter emergency fund - our Emergency Fund Calculator sets that target.
Should You Refinance?
Private refinancing can cut the rate substantially if your credit and income are strong - but refinancing federal loans into a private loan permanently gives up income-driven repayment, deferment options, and forgiveness eligibility. It's usually a good trade only for high-rate private loans, or for federal borrowers with very stable income who've ruled out forgiveness paths.
Mistakes to Avoid
- • Making extra payments while pursuing PSLF or income-driven forgiveness - you're prepaying debt that would be forgiven
- • Letting extra payments "advance the due date" instead of reducing principal
- • Refinancing federal loans for a small rate cut and losing the safety net
- • Ignoring the highest-rate loan while paying extra on the biggest one
- • Deferring loans where interest capitalizes, quietly growing the balance
Juggling Other Debts Too?
Student loans rarely exist alone. If you also carry credit cards or a car loan, the order you attack them matters more than any single loan's schedule. Our Debt Payoff Calculator takes all your debts and compares the snowball and avalanche strategies across them.
Keep Exploring
Round out your debt strategy:
- • Multiple debts? Compare strategies in the Debt Payoff Calculator
- • Read Snowball vs. Avalanche: Two Debt Payoff Methods Compared
- • Build your cushion first with the Emergency Fund Calculator
- • Weighing payoff vs. investing? See what invested dollars become in the Compound Interest Calculator
Frequently Asked Questions
How long does it take to pay off student loans?
The federal standard plan is 10 years, but the average borrower takes closer to 20 because of deferments, income-driven plans, and minimum payments. The calculator above shows your actual timeline - and how dramatically even modest extra payments shorten it.
Should I pay off student loans early or invest?
Compare your loan rate to realistic investment returns. Early payoff is a guaranteed return at the loan's rate - compelling above about 7%, questionable below about 5%, judgment call in between. Always capture an employer 401(k) match first; that return beats any loan rate.
Do extra payments automatically go to principal?
Not always. Some servicers apply extra money as an early payment of next month's bill, which saves you nothing. Instruct your servicer - usually a setting in the payment portal - to apply anything beyond the scheduled payment directly to principal, and check the next statement to confirm.
Which loan should I pay extra on first?
Mathematically, the highest interest rate first (the avalanche method) - private loans and PLUS loans usually top the list. If you need motivation from quick wins, the smallest balance first (snowball) also works. Keep paying minimums on everything else either way.
Should I refinance my student loans?
For private loans, refinancing at a lower rate is usually a clean win. For federal loans, be careful: refinancing converts them to private, permanently forfeiting income-driven repayment, generous deferment, and forgiveness programs. Only refinance federal loans if your income is secure and you're certain you won't want those protections.
What is income-driven repayment?
Federal plans that set your payment as a share of discretionary income rather than your balance, with the remainder forgiven after 20-25 years of qualifying payments. They're the right tool when the standard payment is unaffordable - but if you'll earn your way out of them, you may pay more interest overall than attacking the loan directly.
If I expect loan forgiveness, should I still pay extra?
Usually not. Under Public Service Loan Forgiveness or income-driven forgiveness, any balance remaining at the finish line is wiped out - so extra payments just reduce the amount forgiven. Make the required payments, document everything, and put the extra money toward other goals.
Is student loan interest tax deductible?
Up to $2,500 of student loan interest per year is deductible as an above-the-line deduction - no itemizing required - subject to income phase-outs. Your servicer reports the interest on Form 1098-E. It's a modest but real discount on the true cost of the loan.