Debt Snowball vs Avalanche Calculator

Both methods have you pay the minimum on every debt and send all extra money to one target debt. The snowball targets your smallest balance first for quick wins; the avalanche targets your highest interest rate first to minimize total interest. When a debt is paid off, its minimum payment rolls into the next target - that rollover is what accelerates both methods.

Mathematically the avalanche always pays the same or less total interest, because expensive debt dies sooner. Behaviorally, the snowball produces faster visible wins, which helps many people stick with the plan. Run your real numbers above - when the difference is small (often under a few hundred dollars), pick whichever keeps you motivated; when it is large, the avalanche is hard to argue with.

Dave Ramsey teaches the debt snowball as Baby Step 2 of his plan, arguing that behavior change matters more than interest math. His reasoning is that people who see accounts close quickly are more likely to finish. The avalanche remains the cheaper method on paper; Ramsey simply bets that motivation beats optimization for most households.

Under the snowball, the smallest balance goes first regardless of rate. Under the avalanche, the highest APR goes first regardless of size. If one of your debts is both the smallest and the most expensive - common with store and credit cards - the two methods agree, and the calculator will show identical results.

Every extra dollar shortens the timeline, and the effect compounds because freed-up minimums stack. In the worked example on this page, $250 extra per month turns a 74-month slog into 46 months and cuts interest nearly in half. A realistic, sustainable amount you can pay every single month beats an ambitious amount you abandon by summer.

Yes - both methods are guaranteed to work if your budget covers more than the monthly interest, because principal falls every month. Research on debt repayment behavior (including work published in the Journal of Marketing Research) found that people who concentrate payments on one account at a time are more likely to persist, which is the snowball’s core design.

It does not go back into your pocket - it rolls into the payment on the next target debt. That is the entire snowball effect: your total monthly outlay stays constant while the amount hitting the target debt keeps growing. This calculator models the rollover automatically, which is why later debts fall much faster than early ones.

Usually no. Snowball and avalanche plans are designed for consumer debt - cards, auto loans, personal and student loans. Mortgages are larger, cheaper, and often tax-advantaged, so most plans (including Ramsey’s) treat mortgage payoff as a separate, later goal. Use a dedicated mortgage extra-payment calculator for that decision.

Yes, and it can be a smart hybrid: start with the snowball to knock out one or two small balances for momentum, then switch to the avalanche so your remaining dollars attack the highest rate. Your total budget does not change - only the ordering rule for the target debt does. Re-run the calculator whenever a debt closes to see your updated plan.

They can complement either method. Moving a high-APR balance to a 0% intro-APR card effectively turns your most expensive debt into your cheapest, which changes the avalanche order - re-enter the new rate above to see the impact. Watch the transfer fee (typically 3-5%) and make sure you can clear the balance before the intro period ends.