Debt tool

Debt Payoff Calculator

Enter your debts and one extra payment. See the month you are debt free, the interest you pay, and how much you save against paying only the minimums. No sign-up, no email.

✓ Cross-checked against an independent simulation ✓ Avalanche and snowball side by side ✓ 100% free, runs in your browser, stores nothing

Your debts

Debt 1 name

Balance

APR

Minimum

Debt 2 name

Balance

APR

Minimum

Debt 3 name

Balance

APR

Minimum

Debt 4 name

Balance

APR

Minimum

Leave a balance at 0 to skip a row. Names are only used to label the order below and are never sent anywhere.

Your plan

Extra each month on top of minimums

Method

Interest is charged monthly at APR divided by 12. When a debt is paid off, its payment rolls onto the next one.

Debt free in

n/a

with your extra payment

and

Interest saved

n/a

versus minimums only

Your plan

Total interestwith your plann/a

Total paidbalances plus interestn/a

Interest, minimums onlyno extra paymentn/a

Time, minimums onlyno extra paymentn/a

Time savedversus minimums onlyn/a

In the shop

Want it on paper or in a spreadsheet?

The calculator gives you the date. The shop has the sheets to track it.

See the debt payoff sheetsExcel + Google Sheets or printable PDF · instant download

How this debt payoff calculator works

It runs your debts month by month, the way a lender statement would, and tells you the month the last balance reaches zero.

# each month, for every debt with a balance interest = balance × APR ÷ 12 balance = balance + interest − payment # payments every debt gets its minimum, extra money goes to the first debt in line # avalanche: highest APR first snowball: smallest balance first when a debt hits zero, its payment rolls onto the next debt

Saves the most interest

Avalanche

Extra money attacks the highest interest rate first. On the same payments it never costs more interest than any other order.

Fastest first win

Snowball

Extra money clears the smallest balance first. You close accounts sooner, which keeps many people going, at a small cost in interest.

Prefer paper? A printable debt avalanche worksheet and a debt payoff tracker spreadsheet are in the TidyPaycheck shop.

Questions people ask

Should I use the avalanche or the snowball method?

If you want to pay the least interest, use the avalanche. If you need quick wins to stay motivated, use the snowball. Try both in this calculator and look at the interest difference. If it is small, pick the one you will stick with.

Why does the calculator say a debt is never paid off?

When a minimum payment is smaller than the interest charged each month, the balance grows instead of shrinking. Raise that payment or add an extra amount and the plan will finish.

Does the extra payment roll over when a debt is paid off?

Yes. The total you pay each month stays the same. When a debt reaches zero, the money that went to it moves to the next debt in line. This is the part that makes both methods work.

Can I trust the numbers?

Every result is cross-checked against an independent simulation written separately, using whole cents, on random and edge-case debts. Your bank may differ by a few dollars because of how it counts days and fees.

Is my data saved or sent anywhere?

No. The calculation runs in your browser. Nothing you type is stored or sent, and the share image is drawn on your device from the result only, without your debt names.