Borrowology

Debt payoff calculator, snowball or avalanche

An example is filled in. Change the numbers, then pick a way to pay. Nothing you type is sent anywhere.

1. Your debts

One card or loan per box. You can add up to five.

Debt 1

Debt 2

Debt 3

2. Anything extra each month?

This is money on top of the minimums. When one debt is gone, its payment moves to the next one. Leave this at 0 if you can only pay the minimums.

3. Pick a way to pay

Tap one. The date and the interest update right away.

With Highest interest first

Paid off December 2028

You pay $2,285.61 in interest, and $12,285.61 in total.

That is $3,781.84 less interest than paying only the minimums.

Order: Card A, Card B, Card C

See the chart
Balance left over time
$0$5k$10k032m64mMinimum paymentsSmallest firstHighest interest

Month by month
2026
MonthPaymentInterestRemainingCard ACard BCard C
1 · October 2026$465.00$169.25$9,704.25$4,258.71$3,170.64$2,274.90
2 · November 2026$465.00$163.50$9,402.75$4,012.40$3,140.82$2,249.53
3 · December 2026$465.00$157.61$9,095.36$3,760.96$3,110.52$2,223.88