Debt Snowball vs Avalanche Calculator
Add your debts and see which payoff method saves you more money. Compare snowball (smallest balance first) vs avalanche (highest interest first) side by side.
How Debt Snowball and Avalanche Methods Work
The debt snowball method, popularized by Dave Ramsey, pays off debts from smallest balance to largest regardless of interest rate. Once the smallest debt is paid off, its payment rolls into the next smallest — creating a "snowball" effect. The debt avalanche method targets the highest interest rate first, then the next highest. Mathematically, avalanche always saves more in total interest. However, snowball provides quicker psychological wins that keep people motivated. Studies from Northwestern University found that people using snowball were more likely to actually become debt-free because of this motivation factor.
When Snowball Beats Avalanche (Psychologically)
If you have many small debts scattered across credit cards, personal loans, and medical bills, snowball can rapidly eliminate several debts in the first few months. Each payoff feels like a win, reinforcing the habit. If your highest-rate debt also has the largest balance, avalanche can feel discouraging because you see no debts disappearing for months or even years. For people who struggle with discipline or have tried and failed to pay off debt before, snowball is usually more effective in practice despite being less mathematically optimal. The best debt payoff method is the one you actually stick with.
When Avalanche Is the Clear Winner
When there is a large spread between your highest and lowest interest rates (such as a 24% credit card vs a 4% student loan), avalanche can save thousands more than snowball. If your debts are similar in size but vary widely in rates, avalanche dominates. If you are disciplined and motivated by seeing total interest savings rather than quick wins, avalanche is your method. The difference between methods is largest when you have high-interest debt — on debts all below 6%, the methods produce nearly identical results and it barely matters which you choose.
How Extra Payments Accelerate Both Methods
The key to both snowball and avalanche is making minimum payments on all debts while directing ALL extra money to one target debt. Once that debt is eliminated, the freed-up payment plus your extra amount targets the next debt. The more extra money you can direct, the faster both methods work. Even an extra $100/month can shave years off your debt timeline. Common sources of extra payment money include: cancelling unused subscriptions, selling items, meal prepping instead of dining out, overtime work, tax refunds, and birthday money. Every dollar directed at debt is a dollar that stops generating interest against you.