The free loan payoff calculator that works for personal loans, auto loans, student loans, and any fixed-rate debt. Enter your balance, rate, and payment to get your payoff date and a complete three-scenario comparison.
See how extra payments accelerate your payoff in the scenarios below
Enter your loan details to see your payoff plan.
This free loan payoff calculator handles any fixed-rate installment loan: personal loans, auto loans, student loans, debt consolidation loans, home improvement loans, or any other fixed-payment debt. Enter your current outstanding balance, your interest rate, and your monthly payment — and you'll instantly see your payoff date, total interest cost, and a three-scenario comparison showing how extra payments accelerate your path to debt-free.
Personal loans from banks, credit unions, and online lenders typically carry APRs of 8–20% for borrowers with good credit, and 20–36% for those with fair credit. They're commonly used for debt consolidation, home improvements, medical expenses, and major purchases. Because personal loans have fixed interest rates and fixed monthly payments, they're the simplest type of loan to calculate — your payment is the same every month, your interest charge shrinks as your balance falls, and you'll pay exactly the number of payments you calculate here.
Auto loans are secured by the vehicle, which is why they typically carry lower interest rates than unsecured personal loans — generally 5–10% for new cars and 7–15% for used vehicles as of 2024–2025. The loan payoff calculation is identical regardless of what's securing the loan: the same amortization math applies. One important consideration with auto loans: if you're "underwater" on your loan (you owe more than the car is worth), paying extra each month to get back above water should be a priority before any other debt strategy.
Student loans come in two main flavors: federal (typically 5–8% fixed) and private (variable or fixed, typically 4–15%). Federal student loans have additional considerations — income-driven repayment plans, Public Service Loan Forgiveness, deferment options — that this calculator doesn't model. For straightforward payoff planning on standard repayment plans, however, the math here is accurate. For private student loans, the calculation is identical to any other fixed-rate installment loan.
On a $15,000 personal loan at 12% APR with a $350/month payment: the standard payoff takes 52 months and costs $3,180 in interest. Adding just $100/month cuts it to 39 months and saves $1,240 in interest. The scenarios section above shows you this calculation for your own numbers.
Make biweekly payments. Instead of one monthly payment, make half-payments every two weeks. This results in 26 half-payments (13 full payments) per year versus 12 monthly payments — one extra payment annually with no budget impact.
Round up your payment. If your payment is $347, pay $400. The extra $53/month costs you almost nothing in daily spending but compounds significantly over a multi-year loan term.
Apply windfalls directly. Tax refunds, work bonuses, or any unexpected lump sum applied to your loan principal directly reduces all future interest charges. Even a $500 one-time payment can eliminate several months from your payoff timeline.
Refinance to a lower rate. If your credit score has improved since you took out the loan, or if rates have fallen, refinancing to a lower rate reduces your interest cost significantly. Compare the refinancing costs against the interest savings to verify it's worthwhile.
Use the debt avalanche. If you have multiple loans, target the highest-rate loan first with any extra money while maintaining minimums on the others. Our multi-debt planner automates this calculation across all your loans simultaneously.
Before aggressively paying off any loan, check your loan agreement for prepayment penalties. A prepayment penalty is a fee charged by some lenders when you pay off a loan early — either in full or beyond a certain amount per year. They're most common on auto loans, some personal loans, and older mortgage products. Federal student loans and most modern personal loans from reputable lenders do not have prepayment penalties.
Prepayment penalties typically come in two forms: a flat fee (e.g., $200 if you pay off within the first two years) or a percentage of the remaining balance (e.g., 2% of the outstanding balance). Calculate whether the interest savings from early payoff exceed the penalty before committing to an aggressive extra-payment strategy. For most loans, even with a penalty, extra payments save money — but it's worth verifying.
Refinancing replaces your existing loan with a new one at a lower interest rate, reducing your ongoing interest cost every month. Extra payments reduce your balance faster at your existing rate. Both work — the right choice depends on your numbers. Refinancing makes the most sense when: you can reduce your rate by at least 1.5–2 percentage points, you plan to keep the loan long enough to recoup any origination fees, and your credit score has improved since you took the original loan.
Extra payments make the most sense when: your current rate is already competitive, you don't want the friction of a new loan application, your remaining term is short enough that refinancing fees wouldn't be worth it, or you simply want the psychological satisfaction of accelerating payoff without restructuring. In many cases the best approach is both — refinance to a lower rate, then make extra payments against the new lower balance.
One of the most painless ways to accelerate loan payoff is switching from monthly to biweekly payments. Instead of making 12 full monthly payments per year, you make 26 half-payments — which equals 13 full monthly payments annually. That extra payment per year, applied entirely to principal, can shave years off a long-term loan with no change to your monthly budget feel.
On a $20,000 personal loan at 10% APR with a $430/month payment over 5 years, switching to biweekly payments reduces the payoff to about 4 years and 4 months, saving roughly $400 in interest. The effect is more dramatic on longer-term loans. Most lenders don't offer official biweekly programs — you can replicate the effect by adding 1/12 of your monthly payment to each payment, effectively making 13 payments per year.
Most consumer loan interest — personal loans, auto loans, credit cards — is not tax deductible. This makes the effective cost of borrowing equal to the stated rate, with no tax offset. Student loan interest is deductible up to $2,500/year for borrowers below certain income thresholds ($85,000 single / $170,000 married as of 2024). Mortgage interest is deductible if you itemize, making the effective rate meaningfully lower for high-income borrowers in high-rate environments.
For non-deductible consumer debt, there's no tax reason to delay payoff. For deductible debt, the calculus is slightly more complex — a student loan at 5% with a 22% marginal tax rate has an effective cost of about 3.9% after the deduction, which may be below the return available from investing. Run both calculations before deciding whether to aggressively pay off deductible debt or invest the extra money instead.
Can I use this for a car loan? Yes. Enter your remaining balance, your loan's APR, and your monthly payment. The calculation is identical for auto loans. If your car loan has a prepayment penalty (less common but exists), check your loan agreement before making extra payments.
Can I use this for student loans? Yes for standard repayment. Federal student loan programs like income-driven repayment, PSLF, or income-based repayment involve different calculations that depend on your income, family size, and loan type. For those, use the Federal Student Aid Loan Simulator at studentaid.gov. For private student loans on standard repayment, this calculator is fully accurate.
Why does my payoff date not match my lender's? Minor differences can come from daily vs monthly interest compounding, payment timing within the month, or rounding differences. Our calculator uses monthly compounding, which is the most common. The difference is typically a month or two on multi-year loans and doesn't affect the strategic value of the calculation.
What if I have multiple loans? Use our multi-debt planner, which handles multiple loans simultaneously and shows you the optimal payoff order using either the avalanche (highest rate first) or snowball (smallest balance first) method. It calculates exactly how rolling freed-up payments from paid-off loans accelerates the remaining ones.