Key takeaways
- The gap is largest when your smallest debt has a low interest rate, as in this example.
- When the smallest debt also has the highest rate, both methods give the same order and cost.
- The best method is the one you will keep using; consistency matters more than the order.
Why the two orders differ here
The example debts are a $2,500 loan at 9%, a $6,000 card at 26% and a $9,000 card at 19%. Snowball attacks the $2,500 loan first because it is smallest, even though it has the lowest rate. Avalanche attacks the 26% card first. Every month the 26% balance stays larger under snowball adds interest, which totals about $803 more by the end, plus one more month of payments.
The case for the snowball
Clearing a whole account quickly gives a visible win and one fewer bill to track. Some research on consumer debt repayment suggests that closing out individual balances helps people stay motivated. If you have tried and abandoned a payoff plan before, a slightly more expensive plan you finish beats a cheaper one you quit.
A hybrid approach
Some people knock out one or two tiny balances first for momentum, then switch to the highest rate. Try different extra amounts in the calculator; the bigger the extra payment, the faster both methods finish.
Worked example
Minimums are $50 + $150 + $225 = $425; with $300 extra the budget is $725 a month. Avalanche pays the 26% card first, then the 19% card, then the 9% loan: debt-free in 31 months with $4,528 interest. Snowball pays the $2,500 loan first: 32 months and $5,331.
Methodology and sources
Both plans are simulated month by month with the same total budget. Interest is each APR ÷ 12 times the balance. Every debt receives its minimum, and the remainder goes to the target debt (highest APR for avalanche, smallest balance for snowball). Freed-up minimums roll into the next target. Results are estimates; lender interest methods vary.
Sources: CFPB – Credit cards
Frequently asked questions
Which is better, snowball or avalanche?
Avalanche saves the most interest mathematically. Snowball may help you stay motivated. Pick the one you will stick with.
How much does the avalanche method save?
It depends on your debts. In this example it saves about $803. When the smallest debt also has the highest rate, both methods are identical.
Should I include my mortgage?
Usually not. These methods are designed for consumer debts like cards and personal loans; mortgages are typically handled separately.
What extra payment should I use?
Whatever you can sustain every month. Even a modest fixed amount shortens the timeline significantly when combined with rolling minimums.
Results are estimates for educational purposes and are not financial advice.