How the debt snowball method works
- List debts smallest balance to largest.
- Pay the minimum on every debt.
- Put every extra dollar on the smallest.
- When it's paid off, roll its payment into the next.
(Ramsey)
Worked example
You have a $1,500 personal loan at 9.5% APR ($60 minimum) and a $6,000 credit card at 24.99% APR ($150 minimum). You can pay an extra $200 per month on top of all minimums.
Snowball pays the personal loan first because it has the smaller balance. The loan is gone in month 6; its $60 payment rolls into the credit card along with your $200 extra. You are debt-free in 24 months with $1,935.34 in total interest.
Avalanche on the same numbers targets the higher APR card first and finishes in 23 months with $1,669.51 interest — about $265.83 less. Snowball trades a little interest for quicker wins on the smaller loan.