Which credit card should you pay off first?

Short answer: pay the minimum on every card, every month, no matter what — then send every extra dollar to either your highest-interest card (saves the most money) or your smallest balance (clears a card the fastest). Which of those two you pick depends on what actually keeps you motivated, not just the math. Below is how each works, worked examples with real numbers, and the traps to avoid along the way.

The two accepted strategies

Personal finance has largely settled on two approaches for ordering which card gets your extra payment. Both assume you're already paying at least the minimum on every card — the strategy only decides where anything above that goes.

Avalanche: pay the most expensive debt first

You rank every card by interest rate, highest to lowest, and send all extra money to the top of that list. Once it's paid off, its old minimum payment rolls into your extra amount for the next-highest-rate card. Mathematically, this is the cheapest way to get out of debt — you're always paying down the balance that's costing you the most per month to carry.

Snowball: pay the smallest balance first

You ignore interest rates entirely and rank cards by balance, smallest to largest. The appeal isn't the math — it's momentum. Clearing an entire card off your list, even a small one, is a concrete, visible win that keeps a lot of people more consistent with the plan than watching a big high-rate balance shrink slowly for months.

A worked example with real numbers

Say you're carrying three balances and can put $250/month toward debt beyond the minimums:

In this particular case, the two methods actually agree on the order — the smallest balance happens to also carry the highest rate, which isn't unusual with store cards. That won't always be true. If the store card instead had the lowest rate of the three, Avalanche and Snowball would disagree on where to start, and Avalanche would end up saving more in interest while Snowball would still clear a card fastest. The only way to know the real difference for your specific balances is to run them.

Common mistakes that cost more than the method you pick

Spreading extra payments across every card evenly

It feels fair to split $250 extra three ways, but it's mathematically the slowest option. A card only frees up its minimum payment once it's fully paid off — not partially paid down. Concentrating extra money on one card at a time, in either order, beats spreading it thin almost every time.

Paying only the minimum on everything

Minimum payments are usually calculated as a small percentage of your balance, which means the required payment shrinks as your balance shrinks — right when you'd want it to hold steady. On a high-rate card, it's possible for a minimum payment to barely outpace the interest accruing that month, stretching payoff out for years or decades. If you're not sure whether your minimum is actually making progress, a calculator can flag this for you directly.

Ignoring a card that's already past due

If one of your cards is delinquent, fix that first, ahead of either method. A past-due account can trigger a penalty APR and gets reported to credit bureaus the longer it sits unpaid — costs that usually outweigh whatever you'd save picking the "optimal" payoff order.

So which should you actually pick?

If you're confident you'll stay consistent regardless of how slow progress feels at first, Avalanche saves you more money, full stop. If you've started and stopped debt payoff plans before, or you know you need to see progress to stay motivated, Snowball's quick wins are worth the extra interest cost for most people — the best method is the one you'll actually stick with for the next year or two.

Some people also start with Snowball for the early motivation, then switch to Avalanche once the habit is established and fewer, larger balances remain. There's nothing wrong with changing strategy partway through — you can model either starting point by adjusting your card list in the calculator at any time.

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