Debt Avalanche Calculator
The debt avalanche method pays off highest-APR debts first to minimize total interest paid. Enter your debts and monthly payment to see your payoff order, total interest, and debt-free date.
Your Debts
| Name | Balance ($) | APR (%) | Min Pay ($) |
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What Is the Debt Avalanche Method?
The debt avalanche method ranks all your debts by interest rate (APR) and directs every extra dollar to the highest-APR debt first while paying minimums on the rest. Mathematically, this minimizes total interest paid and shortens your debt-free date — it is the optimal payoff order under standard amortization assumptions. According to CFPB consumer guidance, the avalanche is the lowest-cost mathematical strategy.
Avalanche vs Snowball — Which Is Better?
The avalanche sorts by APR and saves the most money. The snowball sorts by smallest balance first and gives faster psychological wins. A 2016 HBS study found snowball-style early wins can boost adherence — but if discipline is solid, avalanche pays less interest. This calculator implements pure avalanche; pair with a snowball calculator if you want to compare both strategies side-by-side.
How Avalanche Order Is Calculated
Each month, the calculator (1) charges interest on each balance at APR/12, (2) applies the minimum payment to every debt, (3) directs the extra payment + freed-up minimums to the highest-APR debt with a non-zero balance. When a debt clears, its minimum rolls forward to the next-highest APR — this is the "avalanche" rolling effect. Total interest is summed across all months until every balance reaches zero.
Tips to Pay Off Debt Faster
- Refinance high-APR cards. A balance transfer card at 0% APR for 12–18 months can dramatically cut interest. Check the transfer fee (typically 3–5%).
- Negotiate APR with lenders. The Federal Reserve reports average credit card APRs at all-time highs in 2026. A 30-minute call requesting a rate cut works ~30% of the time per consumer surveys.
- Stop adding new debt. Avalanche only works if balances are stationary or decreasing.
- Automate the extra payment. Schedule the extra to hit the highest-APR card on payday — never rely on willpower mid-month.
Sources: Consumer Financial Protection Bureau (consumerfinance.gov), Federal Reserve consumer credit data (federalreserve.gov), Harvard Business School research. Last updated 2026-05.