A free calculator that compares the avalanche and snowball methods and shows how much faster you could be debt-free.
Getting out of debt isn't mainly about discipline — it's about having a clear plan and seeing the finish line. This calculator shows you two things that change behavior: exactly when you'll be debt-free, and how dramatically a small extra payment moves that date closer because more of your money goes to principal instead of interest.
There are two proven payoff strategies. The avalanche method targets your highest-interest debt first, saving the most money. The snowball method targets your smallest balance first, building momentum with quick wins. The best method is the one you'll stick with — the guides below help you choose.
Paying off debt can feel overwhelming when the balance only seems to shrink one painful dollar at a time. The purpose of this page is to replace that uncertainty with a concrete picture: a projected debt-free date and an honest estimate of the total interest you will pay along the way. The sections below explain how the planner turns a few numbers into that picture, how the two main repayment strategies differ, and where you can realistically find money to speed things up.
The planner asks for three core figures: your total outstanding balance, the average interest rate (APR) across your accounts, and the fixed monthly payment you can commit to. Each month, interest accrues on the remaining balance, your payment covers that interest first, and whatever is left chips away at the principal. As the principal falls, the interest charged the following month falls with it, so later payments do more work than earlier ones. By repeating that calculation month after month, the tool estimates how many months remain until the balance reaches zero and tallies the interest paid in the meantime. Adding an optional extra amount lets you compare two timelines side by side and see, in plain numbers, what acceleration buys you. These are estimates for planning and learning, not a promise of exact results, since real accounts may carry varying rates, fees, or minimum-payment rules.
Once more than one debt is in the picture, the order you attack them in matters. The avalanche method directs every spare dollar at the account with the highest APR while paying minimums on the rest; mathematically, this costs the least in total interest and usually reaches debt-free fastest. The snowball method instead targets the smallest balance first, regardless of rate, so you eliminate whole accounts quickly and feel visible progress that keeps you motivated. Neither answer is universally correct. If staying engaged is your biggest risk, the momentum of snowball can be worth a little extra interest; if discipline is not your obstacle, avalanche keeps more money in your pocket. The method you will actually follow through on beats the theoretically optimal one you abandon in month three. The Consumer Financial Protection Bureau (CFPB) publishes free, unbiased material on both approaches if you want a neutral second opinion.
The single most powerful lever in any payoff plan is the extra payment, because every additional dollar bypasses interest and lands directly on principal. You rarely need a dramatic income jump to find it. Trimming a few recurring subscriptions, cooking a couple more meals at home each week, or renegotiating an insurance premium can free up a modest but steady amount. Windfalls matter even more: a tax refund, a work bonus, a rebate, or the proceeds from selling unused items can all be applied as lump-sum payments that knock months off the timeline. Just as important as adding money is not undoing your progress, so resist taking on new debt while you pay down the old, since fresh balances reset the math and erode your motivation. This page is educational and is not financial advice; for guidance tailored to your full situation, consider speaking with a qualified, licensed financial professional.
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Avalanche (highest rate first) saves the most money; snowball (smallest balance first) builds motivation. The best method is the one you'll stick with.
Extra payments go entirely to principal, so they cut both the time and the total interest dramatically — far more than the extra amount alone suggests.
A 0% intro-APR transfer can speed payoff if you clear most of the balance before the rate expires. Watch the transfer fee and the reverting rate.
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Move high-interest debt to a 0% intro APR card and pay it down faster.
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