Loan Payoff Calculator
Yearly Payoff Schedule
| Year | Principal Paid | Interest Paid | Balance |
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How to Pay Off Your Loan Faster — and Pay Less Doing It
Most people know their monthly payment. Far fewer know their payoff date, their total interest cost, or how dramatically a small extra payment changes both. This calculator shows you all three — and gives you the motivation to act on them.
How to Use This Calculator
Enter your current loan balance, your annual interest rate, and your regular monthly payment. The extra payment field is optional — but try entering even $50 or $100 there and watch what happens to your payoff date and total interest. The year-by-year schedule shows exactly how your balance shrinks over time.
How Loan Payoff Is Calculated
Each month, interest is charged on your remaining balance at the monthly rate (annual rate ÷ 12). Whatever is left of your payment after covering that interest reduces your principal. As your balance falls, the interest portion of each payment shrinks — which means more of every payment goes toward principal as time goes on. This is called amortization, and it's why paying extra early has a disproportionately large effect.
The formula to find the number of months remaining on a loan is:
Where n is months remaining, r is the monthly interest rate, P is the current balance, and PMT is your monthly payment.
Real-World Example
Using the calculator's default values — a $15,000 loan at 6.5% with $300/month payments:
- Months to pay off: ~59 months (just under 5 years)
- Total interest paid: ~$2,700
- Total paid: ~$17,700
Now add just $100/month in extra payments ($400 total):
- Months to pay off: ~42 months (3.5 years)
- Interest saved: ~$700
- Time saved: over 17 months
An extra $100/month saves you nearly a year and a half and $700 in interest. The earlier in the loan you make those extra payments, the bigger the impact — because you're reducing the principal that interest is calculated on.
The Power of Extra Payments
Extra payments work so well because of how amortization is front-loaded with interest. In the early months of a loan, most of your payment goes toward interest and very little toward principal. Any extra payment you make goes entirely to principal — immediately reducing the balance that future interest is calculated on. That's why even a modest extra amount, applied consistently, can shave years off a loan and save significant money.
A few approaches worth knowing:
- Fixed extra monthly amount — the simplest approach. Even $25–$50/month adds up significantly over time.
- Bi-weekly payments — paying half your monthly payment every two weeks results in 26 half-payments per year, which equals 13 full monthly payments instead of 12. That extra payment per year accelerates payoff without feeling like much.
- Lump sum payments — windfalls like tax refunds or bonuses applied directly to principal can shave months off a loan instantly.
What Loans Does This Work For?
This calculator works for any fixed-rate installment loan — a loan with a set balance, a fixed interest rate, and regular equal payments. That includes:
- Personal loans
- Auto loans
- Student loans
- Any other fixed-rate consumer debt
It does not apply to revolving credit like credit cards, where the balance and minimum payment change monthly. For credit cards, use our credit card payoff calculator instead.
Debt Payoff Strategies
If you have multiple loans, two proven strategies can help you prioritize:
- Avalanche method — pay minimums on all loans, then put every extra dollar toward the loan with the highest interest rate. Mathematically optimal — you pay the least total interest this way.
- Snowball method — pay minimums on all loans, then attack the smallest balance first regardless of rate. Each paid-off loan builds momentum and motivation. Behaviorally, many people find this easier to stick with.
Neither is wrong. The best strategy is the one you actually follow through on.
Frequently Asked Questions
What happens if I only ever make the minimum payment?
On installment loans, making the minimum payment means you'll pay off the loan exactly on schedule — but you'll pay the maximum possible interest. On credit cards, minimum payments are calculated to keep you in debt as long as possible, with interest accumulating rapidly. The minimum is the floor, not the goal.
Is it better to pay off debt or invest?
The general rule: if your loan's interest rate is higher than what you'd reasonably earn investing, pay off the debt first. A credit card at 20% APR is a guaranteed 20% return when you pay it off — you won't find that investing. Low-rate loans (under 5–6%) are often worth carrying while investing, especially if you're getting an employer match on retirement contributions.
What's the difference between a fixed and variable rate loan?
A fixed-rate loan has an interest rate that never changes — your payment stays the same for the life of the loan and this calculator applies perfectly. A variable-rate loan has a rate that can rise or fall with market conditions, making the payoff date harder to predict. If you have a variable-rate loan, use the current rate for a snapshot estimate.
Does paying off a loan early have any downsides?
Some loans have prepayment penalties — a fee charged if you pay off the loan early. These are more common on auto loans and some personal loans. Check your loan agreement before making large extra payments. For most modern loans, there's no penalty and paying early is purely beneficial.
How do I find my current balance and interest rate?
Log in to your lender's online portal or check your most recent statement. Your balance (sometimes called the payoff amount) and APR should both be clearly listed. If you can't find them, call your lender — they're required to provide this information.