Pay the smallest balance first, or the highest rate first? One saves more money, the other keeps more people going. The best method is the one you will still be following in month eight.
If you carry several balances, cards, a personal loan, a car note, the order in which you attack them changes both the total interest you pay and the odds that you finish. Two methods dominate the advice, and they disagree about what comes first. Both assume you keep paying every minimum on time; the argument is only about where the extra money goes.
The snowball: smallest balance first
List your debts by balance, smallest to largest. Pay the minimum on all of them and throw every extra dollar at the smallest. When it is gone, add its payment to the next one, and so on. The payments grow like a snowball, and the number of accounts shrinks quickly.
The appeal is psychological. Closing a $600 store card in six weeks is a visible win, and people who see wins early tend to keep going. Research on repayment behavior consistently finds that finishing accounts, not saving interest, predicts who completes the plan. Each closed account also removes a minimum payment from the monthly list, which makes the next month’s budget simpler and the plan easier to keep.
The avalanche: highest rate first
List your debts by APR, highest to lowest, and direct the extra money to the most expensive one while paying minimums on the rest. Mathematically this is the cheapest path: every dollar goes where it stops the most interest. It is also the method that most closely resembles what a consolidation loan does for you automatically, replacing the most expensive balances first.
The cost is patience. If your highest-rate debt is also your largest, the first payoff can take a year or more, with nothing to show for it except a slowly shrinking number. People who like spreadsheets tend to do well with it; people who need a visible finish line every few months often drift back to minimum payments.
How much the difference is worth
Take three debts: $2,000 at 24%, $6,000 at 19% and $10,000 at 8%, with $700 a month available in total. The avalanche and the snowball happen to agree here, because the smallest balance also has the highest rate. Now swap the rates so the $10,000 sits at 24%: with $700 a month the avalanche finishes about two months sooner and saves well over a thousand dollars in interest compared with the snowball. The gap grows with the size of the balances and the spread between the rates, and shrinks to almost nothing when the rates are close.
A hybrid that usually wins
Knock out any balance under $500 first, regardless of rate, to shrink the list and free up minimum payments. Then switch to the avalanche for the rest. You get the early wins and most of the interest savings. Revisit the order once a year, because promotional rates expire and a card that was cheap can become the most expensive item on the list overnight. If two rates are within a few points of each other, pay the smaller balance first; the money difference is small and the motivation difference is not.
What matters more than the method
Not adding new debt while you pay, keeping a small emergency cushion so a surprise does not go back on a card, and automating the extra payment so it does not depend on willpower every month. Either method executed for eighteen months beats the better method abandoned in month four. If you can move a high-rate balance to a 0% intro APR card or a lower-rate consolidation loan, do that first and then run the same plan on the new, cheaper debt.
