Debt Snowball vs Avalanche Calculator — Compare Both

Same engine, different target

The snowball and the avalanche run the same machine: pay every minimum, then throw every spare dollar at one target debt until it clears, then roll that payment onto the next. The only difference is which debt is the target. The avalanche targets the highest interest rate first for the least total interest; the snowball targets the smallest balance first for the fastest visible win. Enter your debts and an extra payment in the calculator and it reports the time to debt-free and total interest for each order.

Which to choose

On pure math the avalanche costs the least interest, but the gap is often smaller than people assume, and a plan you abandon costs far more than a few dollars of interest. When one debt has a much higher APR than the rest, the avalanche saves more; when rates are close, the two finish near each other and the choice is behavioral. The best method is the one you will actually follow. Most plans keep a starter cash buffer first — size it on the emergency fund calculator — and you can see where payoff sits in the redundancy-first money framework.

Frequently asked

What is the difference between the debt snowball and the debt avalanche?

Both methods pay the minimum on every debt and direct all extra money at one target debt until it clears, then roll that payment onto the next. The only difference is which debt is the target. The avalanche targets the debt with the highest interest rate first, which mathematically pays the least total interest. The snowball targets the debt with the smallest balance first, which clears a whole account soonest and gives an early, motivating win. Same engine, different order. This is educational only and not financial advice.

Which is better, snowball or avalanche?

On pure math, the avalanche wins because paying the highest rate first always costs the least interest. But the gap is often smaller than people expect, and the snowball's early win keeps some people going who would otherwise give up. The honest answer is that the best method is the one you will actually follow to the end. The calculator on this page shows both outcomes on your own numbers so you can see how large the interest difference really is before deciding. This is general education, not a recommendation.

How much does the avalanche actually save?

It depends entirely on the spread between your interest rates and the sizes of the balances. When one debt has a much higher APR than the rest, the avalanche can save a meaningful amount of interest and time. When your rates are close together, the two methods finish within a small margin and the choice becomes mostly behavioral. Enter your real balances, rates, and minimums into the calculator and it reports the exact interest and time for each method, so you can see the size of the decision rather than guess at it.

Do I stop paying the minimums on my other debts?

No. Both methods require paying the minimum on every debt every month — missing a minimum triggers fees and can damage your credit, which works against the whole plan. The extra payment sits on top of all the minimums and goes to a single target debt. When that debt clears, its minimum is freed and added to the extra, so the amount hitting the next target grows each time an account is paid off. That rolling, growing payment is what gives both methods their momentum.

Where does paying off debt sit in a money system?

High-interest debt is often treated as a top priority because paying it off is a guaranteed return equal to its interest rate, which frequently beats what an investment is expected to earn. That said, most plans still keep a small starter emergency fund in place first, so a surprise expense does not push you straight back onto the card you are paying down. In the redundancy-first framework, a modest cash buffer and high-interest debt payoff usually come before the growth layer.

Does Obsidian Metrics tell me which debts to pay or how much?

No. This is a free educational tool. It simulates both the snowball and the avalanche on the balances, rates, minimums, and extra payment you enter, and reports the time to debt-free and total interest for each. It does not tell you which method to choose, how much extra to pay, or whether to prioritize debt over other goals. Those decisions are personal and depend on your full situation. We are not financial advisors.