Debt Payoff Calculator

The calculator starts with your current debt balance and applies monthly interest using the annual percentage rate that you enter.

Each month, part of the total payment covers interest and the remaining amount reduces the principal balance. Any extra monthly payment increases the amount applied toward the debt.

The process repeats until the balance reaches zero. The calculator then reports the estimated payoff time, total interest, total amount paid, and a month-by-month payment schedule.

After the monthly interest is covered, the remaining payment reduces the principal balance. The calculator repeats the calculation each month until the debt is paid off or the payment is found to be too low to reduce the balance.

A debt payoff calculator estimates how long it may take to repay debt using the current balance, annual interest rate, regular monthly payment, and any additional monthly payment.

It also estimates the total interest cost, total amount paid, and the way each payment is divided between principal and interest.

This type of calculator can be useful for credit card debt, personal loans, installment balances, and other borrowing situations where interest affects the payoff timeline and total cost.

Choose your currency, then enter the amount you currently owe, the annual interest rate, your normal monthly payment, and any extra amount you plan to pay each month.

The calculator immediately estimates the total monthly payment, payoff time, total interest, total paid, and the monthly payoff schedule.

Change the monthly or extra payment to compare repayment strategies. You can save each scenario, select the most useful results, and export them together as a CSV or TXT file.

Changing the selected currency changes the labels and formatting only. It does not automatically convert values from one currency to another.

Once monthly interest is covered, extra payments reduce the principal balance. Future interest is then calculated using a smaller balance.

This can create two benefits: the debt may be paid off sooner, and the total amount of interest paid over the repayment period may be lower.

The effect can be especially noticeable on high-interest credit cards and personal loans. Even a modest additional payment may create meaningful savings when it is made consistently.

Suppose you have a debt balance of $12,000.00 in USD, an annual interest rate of 18.00%, and a base monthly payment of $350.00.

If you also make an extra payment of $50.00 each month, the total monthly payment becomes $400.00.

Under this payment plan, the estimated payoff time is 3 years 5 months, with approximately $4,061.98 in total interest and $16,061.98 paid overall.

Some repayment plans focus on keeping the monthly payment affordable, while others focus on becoming debt-free as quickly as possible. Comparing different payment amounts helps show the tradeoff between monthly cost and long-term interest.

With the debt avalanche method, extra money is generally directed toward the debt with the highest interest rate. This approach is often intended to reduce interest costs.

With the debt snowball method, extra money is generally directed toward the smallest balance first. This can create faster early wins and may help with motivation.

This calculator evaluates one balance at a time, so you can test each debt separately before deciding how to distribute payments across several balances.