Avalanche or Snowball? Put Both on the Same Spreadsheet

The two methods in plain language

The avalanche sends extra money to the highest interest rate while paying minimums on everything else. It usually minimizes interest. The snowball sends extra money to the smallest balance, creating earlier paid-off accounts and faster visible wins.

With $300 extra each month, both approaches make meaningful progress. The avalanche attacks the expensive store card first anyway in this example, so the methods begin identically. I see this overlap more often than the online arguments suggest. It means the supposedly dramatic choice may matter less than consistently sending the extra payment.

Compare the plans on four dimensions

1. Total interest: avalanche usually wins.
2. Time to first payoff: snowball often wins.
3. Monthly cash-flow relief: paying off a larger-minimum debt can matter most.
4. Behavioral fit: the best projection is useless if you abandon it.

A hybrid is allowed

You can clear one tiny nuisance balance for momentum, then switch to highest-rate debt. You can also prioritize a debt tied to an essential asset or an account with a changing promotional rate. Personal finance is not a board game; the rules should serve the household.

Make the system harder to interrupt

Automate minimums, schedule the extra payment for payday, and maintain one simple tracker with balance, rate, minimum, and target order. Recalculate when a rate changes or a balance is transferred. Celebrate a payoff by rolling the entire old payment into the next debt before lifestyle spending absorbs it.