Snowball or Avalanche: Picking a Payoff Order

The Setup Both Methods Share

Whichever order you choose, the mechanics are identical. Pay the minimum on every debt, every month, without exception, missing a minimum costs you a late fee and can damage your credit, which is worse than any ordering mistake. Then take whatever you can spare beyond those minimums and put all of it against one target debt.

When that debt clears, its payment does not go back into your spending. It rolls onto the next target, on top of that debt's own minimum. Each payoff makes the next one faster. That rolling effect is what does the work, and it happens under either method.

The only thing being decided is which debt is the target first.

Avalanche: Highest Interest Rate First

Target the debt with the highest rate, regardless of balance. When it clears, move to the next highest.

This is mathematically optimal. It minimises total interest paid and, for most people, clears everything soonest. If you rank debts purely on what they are costing you, this is the answer.

Its weakness is motivational. The highest-rate debt is often a large one, so the first payoff can be many months away. A plan that shows no visible progress for a year is a plan people stop following, and the arithmetic advantage of avalanche is worth nothing to someone who quit in month five.

Snowball: Smallest Balance First

Target the smallest balance, regardless of rate. When it clears, move to the next smallest.

You will pay somewhat more in total interest. In exchange you get a payoff quickly, often within a month or two, and then another. Each cleared account is one fewer minimum payment, one fewer due date, one fewer thing to track.

That is not merely psychological comfort. Research into real borrowers has repeatedly found that people using the smallest-balance method are more likely to stay with the plan and eliminate their debt, and completion is the outcome that matters. A method that is 3% worse on paper and 30% more likely to be finished is the better method.

How Much Does the Choice Actually Cost?

Usually less than people assume. For a typical mix of consumer debts, the difference between the two orders is often modest in both total interest and payoff date, meaningful, but rarely the difference between success and failure.

The gap widens when one debt carries a dramatically higher rate than the rest. A payday loan or a cash advance against a card can cost so much more than everything else that ignoring it to clear a small balance first is genuinely expensive.

The way to settle it for your own numbers is to run both. The Debt Payoff Planner will show you the total cost and the debt-free date under each order, using your actual balances and rates rather than an example.

Where Both Methods Go Wrong

• Balances that keep growing. Neither method works while spending on the cards continues. Ordering a payoff is pointless if the total is not falling. Fix the inflow first.
• Stopping the rollover. The single most common failure is letting a cleared debt's payment drift back into ordinary spending. The rolling payment is the plan.
• No buffer at all. Putting every spare dollar at debt with nothing in reserve means the next unexpected expense goes on a card, undoing months of work. A small starter emergency fund first is not a detour.
• Ignoring a due date. Minimums come first, always. A missed payment on the debt you are not targeting can cost more than the interest you saved by targeting the other one.

What to Do

1. List every debt: balance, rate, minimum payment, due date. Most people have not seen this on one page.
2. Work out what you can put beyond the minimums, honestly rather than aspirationally.
3. Run both orders and look at the real difference for your numbers.
4. Pick the one you will actually finish, and set the minimums to autopay so the plan cannot be derailed by a forgotten due date.