How this debt payoff calculator works
List each debt with its balance, APR and minimum payment, then choose how much extra you can add each month. The calculator simulates your payments month by month: interest is added to every balance, each minimum is paid, and whatever is left of your total monthly budget goes to one target debt until it's gone.
When a debt is paid off, its minimum payment doesn't disappear — it rolls into the next target. That "rollover" is what makes both methods so much faster than paying each debt on its own. The result shows your debt-free date, total interest, and how much interest you save compared with paying only the minimums.
Snowball vs. avalanche
The avalanche method targets the debt with the highest interest rate first. It always costs the least interest and is usually the fastest route to being debt-free.
The snowball method targets the smallest balance first. It may cost a little more interest, but clearing whole debts quickly gives momentum that helps many people stick with the plan. The calculator shows the interest difference between the two so you can decide which trade-off suits you.
Tips for paying off debt faster
- Keep paying the same total amount. When a debt is cleared, send its old minimum to the next debt instead of spending it.
- Start with an extra $25–$50 if that's all you have. Small extra payments early save more interest than they seem to.
- Check your minimums. If a minimum barely covers the monthly interest, the balance will hardly move — the calculator warns you when a debt can never be paid off.
- Look at balance transfers or consolidation for high-APR cards, but weigh transfer fees and the promotional period.
Frequently asked questions
Which is better, snowball or avalanche?
Avalanche saves the most money because it pays down the highest-rate debt first. Snowball can be better if you need quick wins to stay motivated. The calculator shows both outcomes so you can compare the exact cost difference for your debts.
What does the interest saved figure mean?
It compares your plan with paying only each debt's minimum payment and nothing extra, with no rollover. The difference in total interest is what your extra payments and rollover save.
Why does it say a debt can never be paid off?
If a debt's monthly payment is less than or equal to the interest it charges each month, the balance never shrinks. Increase that debt's minimum payment or add an extra monthly amount.
Does this include new purchases or changing rates?
No. The calculator assumes fixed APRs, interest compounding monthly, and no new charges on the accounts. Variable-rate debts or promotional rates may change your actual timeline.
Should I build savings before paying off debt?
Many planners suggest a small emergency fund first so an unexpected expense doesn't push you back onto a credit card, then focusing extra money on high-interest debt. The right mix depends on your situation.
This calculator is for general informational purposes only and does not constitute financial advice. Actual payoff timelines depend on your lender's terms.