Debt payoff toolkit
This student loan payoff calculator turns three numbers, balance, APR and monthly payment, into your debt free date and total interest, with every step of the math shown. See what bigger payments do to the timeline.
Estimates only. Not financial advice. This calculator runs entirely in your browser and nothing you type leaves your device.
Three numbers run the whole show: your balance, your APR, and the fixed amount you pay each month. Every simulated month, interest accrues first (balance times APR divided by 12), then your payment lands and the balance drops. The calculator repeats this until the balance hits zero, counting months and adding up every dollar of interest along the way. No new borrowing, no fees, constant payment: the cleanest possible picture of your payoff.
Take the numbers prefilled above: a $28,000 balance at 5.80% with a $350 monthly payment. The student loan payoff calculator says 8 years and 6 months, $7,484.92 in interest, $35,484.92 total. Now raise the payment to $500: 5 years and 6 months, $4,729.94 in interest. An extra $150 a month erases $2,754.98 of interest and finishes 3 years sooner. That is the entire game in one comparison, and it is why the standard 10 year plan is a ceiling, not a target.
Federal loans come with protections private loans do not: income driven repayment, deferment, forbearance, and forgiveness programs for public service and other paths. Those protections have real value, which is why most advisors say to pay private loans first if you have both. Private loans behave like any other consumer debt: fixed terms, fewer escape hatches, and usually higher rates. This calculator handles both the same way, because the amortization math does not care who issued the loan. Your strategy should.
Use this calculator before every payoff decision. Wondering whether to refinance to a lower rate? Run both rates. Deciding between the avalanche method (highest APR first across all your debts) and attacking the student loan specifically? The avalanche calculator scales the comparison to every debt you carry. The pattern is always the same: the payment size matters more than the rate. Pick the biggest fixed payment you can sustain, automate it, and direct extra at the highest APR debt first.
Enter your loan balance, APR and the fixed amount you pay each month. The calculator simulates month by month: interest accrues on the balance, then your payment lands. It counts the months, adds up the interest, and shows your debt free date. The math assumes no new borrowing, no fees, and a constant payment.
Enter what you actually pay, not just the minimum or the standard plan amount. If you are on an income driven plan, enter your actual payment. Then try adding $50 or $100 to see what aggressive payments do to the timeline. The difference is usually dramatic.
Because your payment does not cover the monthly interest. On a $28,000 balance at 5.80%, the first month interest is about $135. Pay less than that and the balance grows every month. Raise the payment above the monthly interest and the calculator will show a finish date.
Compare the loan APR to the return you expect. Paying a 7% loan early is a guaranteed 7% return with zero risk. Investing might earn more over decades, but with volatility and no guarantee. Many people do both: kill high rate loans first, then split extra money between investing and lower rate loans.
Yes, enormously. Extra payments go straight to principal, and each principal dollar destroyed also destroys all its future interest. Even $50 extra a month can shave years off a standard 10 year term. There is no prepayment penalty on federal student loans.