Debt snowball vs avalanche — which one actually saves more money?
TL;DR: The avalanche method (highest interest rate first) minimizes total interest paid and is mathematically optimal in almost every case. The snowball method (smallest balance first) usually costs somewhat more in total interest, but its quick early wins keep some people motivated to actually finish the plan — which matters more than the math if the alternative is giving up.
Why avalanche wins the math
Paying off the highest-interest debt first minimizes the total interest that accrues across the whole payoff period — it's a straightforward mathematical result, true regardless of balance sizes.
Why snowball still has a legitimate case
Behavioral research on debt payoff suggests visible, frequent wins (fully closing out a small balance) can meaningfully improve follow-through — a plan that's mathematically optimal but abandoned halfway through is worse than a slightly less optimal one that actually gets finished.
Which should you use?
If you're confident you'll stick with a plan either way, avalanche saves more money. If you know from experience that visible progress keeps you motivated, snowball's small cost may be worth it for the higher odds of actually finishing.
See both methods compared on your real debts
Get Rid of My Loan computes the full solution both ways — fastest debt-free date and lowest total interest — so you can see the actual gap for your specific numbers, not just the general rule.
See both strategies — $9.99 →Frequently asked questions
How much more does snowball usually cost compared to avalanche?
It varies by your specific balances and rates — sometimes the difference is small, sometimes significant, particularly if a high-interest debt happens to also have a large balance under the snowball method's order.
Can I combine elements of both methods?
Yes — some people pay off one or two very small balances first for an early motivational win, then switch to strict avalanche order for the remaining debts, balancing the psychological and mathematical benefits.