Snowball vs. Avalanche: Paying Off Card Debt
If you owe money on more than one card, the order you pay them off changes both how much interest you'll pay and how likely you are to stick with the plan. Two methods dominate, and the CFPB describes both as legitimate strategies for paying down card debt. The mechanics are simple; the trade-off is math versus motivation.
How both methods work
In either case you pay the minimum on every card so nothing goes delinquent, then throw every spare dollar at one target card. The only difference is which card you target first.
- Avalanche: attack the card with the highest APR first. When it's gone, roll its payment into the next-highest rate.
- Snowball: attack the card with the smallest balance first, regardless of rate. When it's gone, roll its payment into the next-smallest.
A worked example
Say you have three balances: $1,000 at 27%, $3,000 at 22%, and $6,000 at 18%, with $400/month to put toward debt above the minimums.
| Method | First target | Why |
|---|---|---|
| Avalanche | $1,000 @ 27% | Highest rate — cuts the most interest |
| Snowball | $1,000 @ 27% | Smallest balance — fastest first win |
Here they happen to agree. They diverge when the smallest balance isn't the highest rate — for example a $1,200 balance at 16% versus a $900 balance at 25%. Avalanche says pay the 25% card; snowball says clear the $900 first for the psychological win.
Which should you choose?
Avalanche is mathematically optimal. Targeting the highest rate always minimizes total interest paid and usually gets you debt-free a little sooner. If the numbers are what motivate you, choose avalanche.
Snowball is behaviorally optimal for many people. Clearing a whole balance early delivers a visible win, and one fewer due date to track. Research on debt repayment has repeatedly found that people who get an early win are more likely to stay the course — and a plan you finish beats a cheaper plan you abandon.
A practical compromise: if your highest-rate card is also one of your smaller balances, the two methods point the same way — start there. Whichever you pick, the engine is the same: minimums everywhere, everything extra on one card, then roll the freed-up payment forward.
The bottom line: Avalanche saves the most money by targeting the highest interest rate; snowball builds momentum by clearing the smallest balance first. Pick the one you'll actually stick with — consistency matters more than the rounding-error difference in interest.
This is general education, not personalized financial advice. Your situation is specific; confirm a plan with a licensed professional or nonprofit credit counselor before acting.