Tools

Debt Payoff Calculator

Estimate a debt payoff timeline, total interest, and the impact of adding extra money each month.

How to use this calculator

Estimate a practical debt payoff timeline.

Use your current balance, average interest rate, and planned monthly payment to see a rough payoff window, interest cost, and how much a little extra can help.

This is an estimate, not a guarantee. Real payoff timing can change if your rate, fees, balance, or payment pattern changes.

Assumes a fixed payment, APR divided by 12, no new borrowing and no fees, with the first payment one month from now. Interest is calculated at full precision; lenders may use daily balances and round each statement. For several debts, calculate each account separately or use a balance-weighted APR for a rough combined estimate.

The calculator starts with sample numbers so you can see how it works. Replace them with your own balance, rate, payment, and optional extra amount.

Sample numbers shown. Replace them with your own.

Calculations update in your browser. Analytics events do not include the values you enter.

Use the balance you are actively trying to pay down. If you have more than one account, a blended estimate is fine.

A rough blended rate is enough for a practical estimate. If most of the balance is on a credit card, use the card APR.

Use the amount you realistically plan to send every month, not your ideal best case.

Use this for the extra amount you may be able to add once the basics and minimum payments are covered.

Reset sample

Your estimate

Adding $50 each month could cut about 11 months and save about $977.62 in interest.

Months to payoff

36 months

Estimated payoff date

September 2029

Estimated total interest

$3,180.81

Impact of the extra payment

11 months faster and $977.62 less interest

Compare the baseline vs. adding extra

This assumes the payment amount stays steady and no new debt gets added along the way.

Without extra

47 months

$4,158.43 interest

With extra

36 months

$3,180.81 interest

Estimate based on $8,500 of debt, a planned payment of $275, and $50 in extra monthly payment.

What this tool helps you do

Use the calculator for a practical estimate, then connect the result to a next step.

Months to payoff

Estimate how long the current payment plan may take.

Interest drag

See how APR changes total cost across the payoff period.

Extra payment impact

Compare how a consistent extra payment changes time and interest.

Need the strategy behind the number?

Keep the result connected to plain-English guidance instead of treating the number as a promise.

Read the guide