Debt Avalanche Calculator

The debt avalanche method is a debt payoff strategy that targets debts in order from highest interest rate to lowest. You make minimum payments on all debts and direct all extra payments to the highest-rate debt first. When that debt is eliminated, you roll its entire payment to the debt with the next highest rate. On a $20,000 debt load with rates ranging from 15% to 28%, the avalanche method typically saves $1,500 to $3,000 more than the snowball method over the payoff period.

The debt avalanche targets highest interest rate first. The debt snowball targets smallest balance first. Both methods use the rollover technique and keep your total monthly payment the same. The avalanche saves more total money. The snowball eliminates individual debts faster early on, which many people find more motivating. The best method is the one you will stick with. Use this calculator alongside the debt snowball calculator to compare both and choose.

In almost all scenarios, yes. The only rare exception is when your smallest balance also happens to have the highest interest rate, which would make both methods identical. In every other situation, targeting high-rate debt first reduces total interest paid. The size of the savings depends on the spread between your interest rates and the balances on your high-rate debts. The wider the rate gap, the larger the avalanche savings.

The total payoff time under the avalanche method is usually very close to the snowball method on the same debt load. The overall timeline depends on how much extra you pay each month, not which method you use. Both methods finish at nearly the same date in most scenarios. The difference is in total interest paid, not payoff speed. Adding any extra monthly payment shortens both timelines. Even $100 extra per month can cut 12 to 18 months off the total payoff time.

Yes. With two debts, the avalanche simply means you target the one with the higher interest rate first. Put all extra payments on the higher-rate debt while making the minimum on the lower-rate debt. When the first is paid off, roll its payment to the second. This is mathematically better than splitting your extra payment between both debts or targeting the larger balance. The loan payoff calculator can help you model the payoff of individual installment debts.

This is actually the best scenario for the avalanche method, even though it takes the longest to eliminate the first debt. A high-rate, high-balance debt is your most expensive debt by far. Every month it stays open, it costs more in interest than any other debt on your list. The avalanche method attacks it immediately, which reduces your total interest cost as fast as possible. The patience required pays off in significant savings compared to targeting smaller balances first.

The standard advice: never reduce retirement contributions below the level needed to capture your full employer match. That match is a 50% to 100% instant return on investment, which beats the guaranteed return of paying off even high-interest debt. Beyond the match, it becomes a math question. Debt at 20% interest costs more than most investments return. If you carry high-interest credit card debt, pausing contributions above the match level and using that money for debt payoff often makes mathematical sense. Use the debt-to-income calculator to assess your full financial picture.