How to Use the Debt Snowball Method, Step by Step

The debt snowball is a payoff order, not a product: pay the minimum on every debt, send everything else to the smallest balance, and when that one is gone, roll its payment onto the next smallest. The payment landing on each debt grows as you go. This guide walks through setting one up, the decisions that come up along the way, and the one trade-off worth knowing before you start.

Step 1: list every debt with three numbers

From each statement, write down the balance, the APR and the minimum payment. Include everything you pay interest on or owe a fixed amount to: cards, store cards, car and personal loans, medical bills on a plan, student loans, money owed to family if it has a payment. Leave out the mortgage unless you intend to put extra on it; most people run the snowball on everything else first.

Step 2: order them smallest balance first

Sort by balance only. The APR does not move a debt up or down the list under the snowball; it only breaks a tie between two equal balances, where the higher rate goes first. The point of the order is to finish a whole debt as early as possible.

Step 3: set one monthly amount and keep it fixed

Add the minimums together, then decide what you can put on top each month. That total, minimums plus extra, is your snowball payment, and the rule that makes the method work is that it does not shrink as debts disappear. When a debt is paid off, its minimum is not released into spending; it stays in the total and lands on the next debt.

Step 4: pay minimums on all but the smallest

Each month, every debt gets its minimum. Whatever is left of your fixed total goes to the smallest balance. If the smallest balance is less than what you have to send it, the remainder spills onto the next one in the same month.

Step 5: roll the payment forward

When the smallest debt reaches zero, its minimum plus the extra become the payment on the next smallest. A worked example with three debts and $100 extra a month:

The total out each month is $392 from the first month to the last; only where it lands changes. The snowball calculator runs this on your own debts and shows the month each one clears.

What to do with extra money

A bonus, a refund or a good month goes to the current target, the smallest balance, in full. Do not spread it across debts; the snowball's whole advantage is finishing one thing at a time. If the one-off is bigger than the target's balance, the rest spills onto the next one, exactly as a normal month would.

0% balances and promotional rates

A 0% balance costs nothing to carry, and under the snowball it is still attacked first if it is the smallest. That is the method working as designed, for the early win, but it is also the case where the snowball and the avalanche disagree most. If a promotional rate ends on a known date, note the rate it reverts to; a balance that is about to jump to a card rate is a reason to move it up regardless of size.

The trade-off: snowball or avalanche

The avalanche uses the same fixed payment and the same rollover but orders debts by APR, highest first. On the same numbers it never costs more interest than the snowball, and it sometimes finishes a month or two sooner; the snowball reaches its first payoff sooner. How large the gap is depends entirely on your list: close APRs make it small, one card-rate balance behind several small loans makes it large. Rather than take a rule of thumb, run both on your debts and read the two numbers: interest difference in dollars, first payoff in months.

When a minimum is below the interest

If a debt's minimum payment is smaller than one month of its interest, that balance grows while you pay only the minimum. The snowball still handles it, because the rollover eventually reaches it with a much larger payment, but it is worth knowing which debt that is: the calculators flag it in your list, and if nothing in the plan reaches it they say so rather than printing a date.

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