Debt Payoff Calculator Online
Plan a debt-free date with the avalanche or snowball method across multiple debts — figures stay on your device.
The Debt Payoff Calculator runs entirely in your browser. The debt balances, rates, and payments you enter never leave your device and nothing is uploaded to ArrayKit. Results are estimates only, not financial advice.
Open the Credit Card Payoff Calculator
About Debt Payoff Calculator
Debt Payoff Calculator plans your route to a debt-free date by simulating monthly payments across every credit card, loan, and line of balance you enter. Choose the avalanche method to target the highest-APR debt first and minimize total interest, or the snowball method to clear the smallest balance first for quick wins that build momentum. Add each debt's balance, APR, and minimum payment, set an extra monthly amount to put toward payoff, and the tool simulates interest accrual and payment cascades month by month until every balance reaches zero. It reports the months to debt-free, total interest paid, and the exact payoff order. Everything runs locally in your browser, and the results are estimates only, not financial advice — confirm your plan with your lender.
Features
- Add multiple debts with balance, APR, and minimum payment for each
- Switch between the avalanche method (highest APR first) and the snowball method (lowest balance first)
- Set one extra monthly payment and see how much faster you become debt-free
- Simulates interest accrual and payment cascades month by month, not a rough approximation
- Reports months to debt-free, total interest paid, and the exact payoff order
- Freed-up minimum payments automatically roll into the next targeted debt as each one clears
- Copy a plain-text summary of the payoff plan for budgeting or sharing
- Runs entirely in your browser — no debt balances or account numbers are uploaded
How to use the Debt Payoff Calculator
- Enter each debt's name, balance, APR, and minimum payment
- Choose the avalanche or snowball method
- Set an extra monthly payment to put toward payoff
- Read the months to debt-free, total interest, and payoff order
- Add or remove debt rows and adjust the extra payment to compare scenarios
Example
Input
2 cards + $300 extra, avalanche
Output
Debt-free in 19 months
Interest: $1,940
Avalanche puts the extra $300 toward the higher-APR card first, then rolls into the second card once it clears.
Common errors & troubleshooting
- The debt payoff calculator shows months as very high or the plan never finishes. — Check that each minimum payment is large enough to cover that debt's monthly interest — a minimum payment below the interest charge means the balance never shrinks on its own.
- APR was entered as a decimal like 0.22 instead of a percentage. — Enter APR as a percentage number, e.g. 22 or 22.9 for 22.9% APR, not 0.229.
- Total interest looks too low compared to a bank's estimate. — Confirm every existing debt is listed with its real APR and minimum payment — leaving out a debt or understating its rate lowers the simulated total interest.
- Avalanche and snowball show almost the same result. — With similar APRs across debts, the two methods behave nearly the same; the gap widens when one debt's APR is much higher than the others.
Frequently asked questions
- What does the Debt Payoff Calculator actually simulate?
- It runs a month-by-month simulation: interest accrues on each balance, every debt gets its own minimum payment, and any extra monthly amount plus the minimums freed by already-paid-off debts is funneled to the current priority debt until every balance reaches zero.
- What is the difference between the avalanche and snowball methods in this calculator?
- Avalanche sends extra payments to the highest-APR debt first, which typically minimizes total interest paid. Snowball sends extra payments to the lowest-balance debt first, clearing accounts faster for psychological momentum even if it costs a bit more interest.
- How many debts can I add to the payoff plan?
- You can add up to eight debt rows, each with its own name, balance, APR, and minimum payment, which covers most people's credit cards, auto loans, and personal loans in one plan.
- Does the Debt Payoff Calculator account for minimum payments changing over time?
- No — it assumes each debt's minimum payment stays fixed and only rolls a debt's minimum into the next target once that debt is fully paid off, which mirrors how most snowball and avalanche plans are followed in practice.
- Is the debt-free date from this calculator guaranteed?
- No. It is an estimate based on the balances, APRs, and payments you enter, assuming they stay constant and payments are made on time every month. Your actual lender, rate changes, and fees can shift the real timeline — this is not financial advice.
- Are my balances and account details uploaded anywhere?
- No. The Debt Payoff Calculator runs entirely in your browser. The debts, rates, and payments you enter never leave your device and are not sent to ArrayKit.
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