Debt Snowball Calculator with Avalanche Comparison

How to use this calculator

List each debt with its balance, APR, and minimum payment — straight off the statements or your banking apps. Add the extra amount you can put toward debt most months, even if it's $25. Then flip between snowball and avalanche: the chart shows both lines at once, so you can see exactly how much daylight there is between the two methods on yournumbers, not someone else's example.

The payoff order list below the chart is the plan itself: which debt gets the extra money now, when each one clears, and what each costs in interest along the way.

Snowball vs. avalanche, honestly

Snowball aims extra money at the smallest balance first; avalancheaims it at the highest interest rate first. Most advice picks a side. The math says the difference is usually smaller than the argument: on this calculator's example debts — a $1,100 store card at 19.9%, a $4,000 credit card at 24%, and a $7,500 car loan at 7.5%, with $100 extra a month — avalanche saves about $72 in interest, snowball clears the store card 14 months sooner, and both finish in 31 months.

That's the honest trade: avalanche is cheaper, snowball pays you in finished accounts. If seeing a zero keeps you going, that motivation is worth real money. We walk through the trade-off in Snowball vs. Avalanche: Two Realistic Ways to Pay Off Debt.

The rollover matters more than the method

Here is the part both methods share, and it's the real engine: when a debt clears, you keep paying the same total each month — the cleared debt's minimum “rolls over” into the next target. Your budget never changes, but the debts fall faster and faster. That rollover is why the example above finishes in 31 months instead of the 43 it takes at minimums alone.

It also means the biggest lever isn't which method you pick — it's the extra amount. With no extra at all, the example debts take 43 months either way and the methods differ by about $3 in interest. With $100 extra, a year of payments disappears. If you only have one card, the credit card payoff calculator shows the same effect with an extra-payment slider.

A calm word about “doing it right”

If you read debt advice for long enough, you'll find people arguing that choosing the “wrong” method reveals something about your character. It doesn't. Snowball and avalanche are two orderings of the same payments. Pick the one that matches how you stay motivated, switch whenever you like — the calculator makes switching free — and let the rollover do the heavy lifting.