Debt Payoff Calculator
Add your debts, add an extra monthly payment, and compare the snowball (smallest balance first) vs avalanche (highest interest first) payoff strategies side by side.
Amount above minimums, put toward your target debt.
Strategy
Add your debts to see your payoff plan.
Avalanche strategy
Debt-free in
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Total interest
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Total paid
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Avalanche vs snowball
| Strategy | Debt-free in | Total interest | Interest saved |
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Both methods use the same total payment — they only differ in which debt gets your extra payment first. Avalanche minimizes interest; snowball builds momentum with quick wins. Total payoff time is often similar.
Payoff order (selected strategy)
| # | Debt | Balance | APR |
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How it works
How debt payoff is calculated.
- 01
Every debt gets its minimum payment
Each month, interest accrues on every debt (balance × APR ÷ 12), then the minimum payment is applied to every debt with a balance. This is the baseline — it happens regardless of strategy.
- 02
Extra payment targets one debt at a time
Your extra monthly payment — plus the minimums freed up from any already-paid-off debts — goes entirely to the first debt still owing in your chosen order. Avalanche orders debts by highest APR first (saves the most money); snowball orders by smallest balance first (fastest early wins).
- 03
Freed-up minimums roll forward
Once a debt hits $0, its minimum payment does not disappear — it rolls into the extra payment pool for the next debt in line. This snowballing effect is why payoff accelerates near the end, and why the order you choose changes your total interest paid.
FAQ
Frequently asked questions.
How to pay off $30,000 in debt in 1 year?
Paying off $30,000 in exactly one year requires roughly $2,500/month combined across minimum payments plus extra payment, though the precise figure depends heavily on your blended APR — higher-rate debt (like 22% credit cards) accrues more interest each month, so more of your payment goes to interest rather than principal. Concentrating every extra dollar on one debt at a time (avalanche or snowball) rather than spreading it thin accelerates payoff because each payoff frees up that debt's minimum to roll into the next target. Plug your exact balances, rates, and minimums into the calculator above to see the real monthly payment needed for a 12-month payoff.
Is $20,000 in credit card debt a lot?
$20,000 in credit card debt is well above the average U.S. cardholder balance, which typically sits in the $6,000–$7,000 range, so yes — it is a significant balance. Whether it is "a lot" in practical terms depends on your income and the APR: at a typical 20%+ credit card rate, $20,000 accrues over $300/month in interest alone if only minimum payments are made, which can make the balance barely shrink for years. It is manageable with a structured payoff plan (avalanche or snowball) and consistent extra payments, but the high APR is what makes it dangerous if left on minimum payments only.
How long will it take me to pay off $30,000 debt?
It depends entirely on your blended interest rate and how much you pay each month — there is no single answer. As illustrative examples: at $800/month total (minimums + extra) on a 20% blended APR, payoff could take 5+ years with substantial interest paid; at $1,500/month on the same balance and rate, payoff typically drops to under 2 years with far less interest. The gap between those scenarios shows how much extra payment amount matters. Enter your actual balances, rates, and available monthly payment into the calculator above for a precise payoff timeline and total interest figure.
How much debt should you pay off each month?
A widely cited starting guideline is the 50/30/20 budget rule: 50% of take-home pay toward needs, 30% toward wants, and 20% toward savings and debt repayment. If you are aggressively targeting debt freedom, many financial planners suggest shifting more of the "wants" category temporarily toward extra debt payments. This is not one-size-fits-all — someone with high-APR credit card debt should prioritize debt payoff more heavily than the 20% guideline suggests, while someone with only low-rate debt might balance debt payoff with building savings and retirement contributions.
What is the difference between debt snowball and debt avalanche?
Both methods use the exact same total monthly payment — they only differ in which debt gets targeted first with extra payment. Debt snowball orders debts from smallest to largest balance, so you pay off the smallest debt first for a quick psychological win, then roll that payment into the next-smallest. Debt avalanche orders debts from highest to lowest interest rate, which mathematically minimizes total interest paid over the life of the debt. Snowball tends to build motivation through fast, visible progress; avalanche saves the most money. Total payoff time is often similar between the two — the interest saved is the real distinguishing factor.
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Last updated: July 28, 2026