Debt Payoff Calculator | Months and Interest Estimate
Estimate how long a debt may take to pay off and how much interest you may pay from balance, APR, and monthly payment.
Debt Payoff Estimate
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Estimate Debt Payoff Time
Enter debt balance, APR, and monthly payment to estimate payoff months, total interest, and total amount paid over the repayment period.
Payment Size Changes the Timeline
Higher payments can reduce interest and shorten payoff time. Check whether your lender has minimum payments, fees, promotional rates, or payoff restrictions.
About This Tool
Debt Payoff Calculator shows how long it takes to eliminate a balance using the avalanche method (highest interest first) or the snowball method (smallest balance first), and calculates the total interest paid for each strategy.
When to Use It
Use this to build a debt elimination plan, to compare interest saved between payoff strategies, or to see how much faster extra monthly payments make you debt-free.
How to Use
- Enter each debt with its balance, interest rate, and minimum payment.
- Set any extra monthly amount you can contribute.
- Choose avalanche or snowball method.
- Click Calculate to see the payoff order, timeline, and total interest.
Frequently Asked Questions
What is the avalanche versus snowball method?
Avalanche targets the highest interest rate first, minimising total interest paid. Snowball targets the smallest balance first for quick wins that motivate continued repayment.
How much difference does an extra payment make?
Even an extra 50 to 100 per month on a high-interest balance can reduce the payoff time by years and save hundreds in interest.
Should I invest instead of paying off debt?
If the debt interest rate exceeds the expected investment return, paying off debt first is mathematically better. At lower rates, investing may produce better long-term outcomes.