Snowball vs. avalanche: which one actually works?

If you’ve got more than one debt, you’ve probably run into the great debate: pay off the smallest balance first, or the highest interest rate first? They have catchy names — snowball and avalanche — and a small army of people online insisting their pick is the only correct one.

Both work. They just optimize for different things, and the “right” one depends on a fact about you that no calculator can see.

The avalanche: optimize for math

The avalanche method pays minimums on everything, then throws every extra dollar at the debt with the highest interest rate. When that one’s gone, you roll its payment onto the next-highest rate, and so on.

This is mathematically optimal. High-interest debt is the most expensive money you owe, so killing it first means you pay the least total interest and, usually, get out of debt a little sooner. If you’re motivated by efficiency and the numbers themselves keep you going, avalanche wins.

An example

• Store card — $612 at 27%
• Visa — $3,140 at 22.9%
• Car loan — $8,900 at 6.4%

Avalanche says: minimums on all three, extra cash onto the store card (27%), even though the Visa and the car loan are bigger. It hurts the interest meter the fastest.

The snowball: optimize for momentum

The snowball method ignores interest rate and attacks the smallest balance first. You pay minimums on everything else and bury the smallest debt, then roll that whole payment onto the next-smallest.

It’s not the cheapest path. But it gives you something the spreadsheet can’t measure: a win, fast. That first debt disappearing in a month or two is a jolt of proof that this is working — and proof is what keeps people in the game long enough to reach the finish.

The best debt plan is the one you’ll actually finish. A slightly more expensive plan you stick with beats an optimal plan you quit in month three.

So which one?

Here’s the honest answer, and it’s the one Inzolo gives you:

• If the interest savings between the two methods is large, that’s a strong case for the avalanche — real money is on the table.
• If the savings gap is small, take the snowball. The motivation is worth more than the rounding error.
• If you’ve started and stalled before, take the snowball. Whatever keeps you going is, for you, the optimal strategy.

The part both methods share: the rollover

Whichever order you choose, the engine underneath is the same — the rollover. When a debt is paid off, its payment doesn’t evaporate back into your spending. It cascades onto the next debt. That’s what turns a slow grind into an accelerating one: each payoff makes the next faster, and the final debt collapses under the weight of every freed-up payment before it.

Pick the method that matches how your motivation actually works, point the rollover at it, and let the payoff date come to meet you.