Debt Payoff Calculator — Snowball vs Avalanche (Free)

Extra payment every month ($)

The extra payment goes to one target debt at a time; when that debt is gone, it rolls to the next.

Snowball vs Avalanche: Which Debt Method Is Right for You?

When you owe money on several debts at once, the hardest question is not how much to pay — it is which debt to attack first. Two proven strategies answer it differently. The snowball method pays off the smallest balance first, whatever its interest rate. The avalanche method pays off the highest interest rate first, whatever its balance. Both work, because both do the same crucial thing: they focus every spare dollar on one target debt while you keep paying minimums on the rest, and when a debt dies, its payment rolls into the next one.

How the Snowball Method Works

List your debts from smallest balance to largest and throw all extra money at the smallest. The first win comes fast — a small store card gone in a few months — and that visible progress keeps people going. Research on debt behaviour consistently finds that quick wins help people stick with a payoff plan, which is why snowball is the most recommended method for anyone who has struggled to stay motivated before.

How the Avalanche Method Works

List your debts from highest interest rate to lowest and throw all extra money at the highest rate. Mathematically this is the cheapest route: expensive credit-card interest dies first, so you pay less interest overall and usually finish sooner. If your rates are far apart — say a 27% store card next to an 11% personal loan — avalanche can save thousands compared with snowball.

Which One Should You Choose?

If the interest saved is large, choose avalanche. If you have quit payoff plans before, choose snowball — the plan you finish beats the plan you abandon. Run both above with your real numbers: the comparison shows your debt-free date, total interest, and payoff order for each, so the choice stops being a guess. Either way, add whatever extra payment you can afford; the calculator also shows the minimums-only baseline, and the gap between that and your plan is the clearest argument for the extra payment.

The Minimum-Payment Trap

Paying only minimums is how a $5,000 card balance can take over a decade to clear. Worse, if a minimum payment is smaller than one month's interest, the balance grows even while you pay. The calculator flags that case explicitly — if you see the warning, that debt needs a higher payment or a share of the extra payment before anything else.

Frequently Asked Questions

What is the snowball debt method?

Snowball means paying off debts from the smallest balance to the largest, regardless of interest rate. You pay minimums on everything and throw all extra money at the smallest debt; when it is gone, you roll its payment into the next smallest.

What is the avalanche debt method?

Avalanche means paying off debts from the highest interest rate to the lowest. You pay minimums on everything and throw all extra money at the highest-rate debt, which minimises total interest paid.

Which method saves more money?

Avalanche almost always saves more in interest, because expensive debt dies first. The saving is biggest when your rates differ a lot — for example a 27% card beside an 11% loan.

Which method pays debt off faster?

Avalanche usually finishes sooner on paper, but snowball often wins in real life because the first quick payoff keeps people motivated enough to finish the plan.

What if my minimum payment does not cover the interest?

Then the balance grows even while you pay. The calculator warns you about this: raise that debt's payment, add extra money to it, or contact the lender about a lower rate or hardship plan.

Is this debt payoff calculator free?

Yes. It is completely free, needs no signup and no email, and runs entirely in your browser — your debts and balances are never sent to any server.