Debt Snowball Calculator
The debt snowball pays your smallest balance first while every other debt gets its minimum. When the smallest is gone, its payment rolls onto the next one, and the amount hitting each debt grows as you go — the snowball. Enter your debts below to see the order, the month each one clears and your debt-free date. The avalanche result sits beside it so you can see exactly what the snowball costs in interest.
How the snowball order is built
Debts are sorted by balance, smallest first, and re-sorted every month on the live balances. All of the extra money goes to the first debt in that order. When it reaches zero, its minimum and the extra both move to the next smallest, so the payment on each successive debt is bigger than the one before. Two debts with the same balance are ordered by APR, higher first.
The monthly total — your minimums plus the extra — stays the same for the whole plan. That is the rule that makes the snowball work: nothing you free up goes back into spending.
What the snowball buys, and what it costs
The snowball reaches its first payoff sooner than the avalanche on almost any list, because it targets the balance that can be finished fastest. The cost is interest: while the small balances are being cleared, a high-APR card keeps charging on its full balance. The badge on each panel above shows which order finishes sooner, which costs less, and how many months earlier the first win arrives, in your numbers.
Snowball with extra payments
The extra amount is where the snowball lives. Even a small monthly extra shortens the plan, because it compounds through every rollover. Try the extra at zero and then at what you could realistically add, and compare the two debt-free dates; the difference is the value of the extra.
Frequently asked questions
What is the debt snowball method?
A payoff order: pay the minimum on every debt and put everything else toward the debt with the smallest balance. When it is paid off, roll its payment onto the next smallest, and so on until the last debt clears.
Does the debt snowball ignore interest rates?
In the ordering, yes — balance decides the order, and rate only breaks a tie. Interest still accrues on every balance, and the calculator charges it each month, so the total interest shown is the real cost of that order.
How is the debt snowball different from the debt avalanche?
The avalanche orders debts by APR, highest first, which minimises interest. The snowball orders them by balance, smallest first, which produces the earliest payoff. This page runs both on your numbers so you can compare the dates and the interest.
Can I include a 0% balance in the snowball?
Yes. A 0% debt accrues nothing; if it is the smallest balance it will still be attacked first under the snowball, which is where the snowball and avalanche most often disagree.
Is this financial advice?
No. It is a calculator that applies one rule to the numbers you enter. It does not assess your circumstances or recommend products. Speak with a qualified professional for advice.
Keep the plan going in Debt Ladder
Debt Ladder is the app behind this calculator. It uses the same payoff engine, then keeps the plan alive: a monthly check-in to log what you actually paid, extra payments on any day for any amount, and a debt-free date that moves as you go. Private and on your phone — no account, no bank linking, no ads. Scan the QR code above to carry this plan into the app.