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Debt payoff calculator: Make a plan to banish β€˜debt drag’ for good

See how long it'll take to pay off your debt, along with how extra payments will adjust your timeline.

Nick Wolny
Written by Nick Wolny
Reading Time: 5 minutes
Last updated on January 20, 2026
This post is not financial advice and is for educational purposes only. Opinions are my own. Some links may be affiliate links, for which I may receive a commission upon click or purchase. Editorial disclosures

When I teach modified saving rate, I include additional debt paydown as saving, because this is money you're allocating to debt that you could have allocated elsewhere.

I like giving bonus points, and you like receiving them, so... here we are. ☺️

Use this calculator to assess your options.

Debt Payoff Calculator

See how extra payments can help you get debt-free faster and save on interest.

Total Debt Bal
Annual Interest Rate (%) APR
Regular Monthly Payment PMT
Extra Monthly Payment +Extra
Regular Monthly Payment
2 yrs, 9 mo
Interest: $3,712
Total paid: $18,712
With Extra Payment
2 yrs, 1 mo
Interest: $2,614
Total paid: $17,614
8 months
Sooner debt-free
$1,098
Interest saved
Balance over time β€” original vs. extra payments
Regular monthly payment With extra payment
Assumes a fixed interest rate and consistent monthly payments. For educational purposes only.

How the Debt Payoff Calculator Works

This calculator helps you build a concrete plan to eliminate your debt. Enter your outstanding balances, interest rates, and minimum payments, and the calculator will show you exactly how long it will take to become debt-free β€” and how much total interest you'll pay along the way.

You can also compare two popular payoff strategies: the avalanche method (pay off highest-interest debt first) and the snowball method (pay off smallest balances first). Each approach has trade-offs, and this calculator shows you the real dollar difference between them.

Payoff strategies

This calculator shows the paydown timeline for one debt, but many people have multiple debts.

To make progress, put all of your additional payment toward one debt at a time. There are two popular approaches on how to sequence your debts.

Avalanche method

The avalanche method prioritizes debts by interest rate, directing extra payments toward the highest-rate balance first. Mathematically, this saves you the most money in interest over time.

If you're motivated by optimizing every dollar, this is the way to go.

Snowball method

The snowball method prioritizes debts by balance size, targeting the smallest debt first. You'll pay slightly more in total interest, but the psychological wins of eliminating entire debts quickly can be powerful motivation to keep going.

The best strategy is the one you'll actually stick with. If the interest savings of the avalanche method motivate you, use that. If quick wins keep you on track, go snowball.

Either way, the most important thing is making consistent extra payments above the minimums.

Beyond the calculator

Once you have a payoff plan, a few strategies can help accelerate it further. Look into balance transfer offers for high-interest credit card debt. Many cards offer 0% APR for 12-18 months, which lets 100% of your payment go toward principal.

If you have student loans, check whether you qualify for income-driven repayment plans or Public Service Loan Forgiveness. And for any debt type, calling your lender to negotiate a lower interest rate is always worth trying. The worst they can say is no.

The most important step is the one you've already taken: running the numbers and facing the full picture. A clear payoff plan is what turns your overwhelming problem into a series of manageable monthly steps. β¬₯

Nick Wolny

About the Author

Nick Wolny is an author and writer covering LGBTQ+ money, work, and culture. His first book, MONEY PROUD, was recommended by The New York Times.

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