If you have several debts and some money left over each month after minimum payments, you have to decide where the extra goes. The two best-known strategies are the debt snowball and the debt avalanche. Both work, and both are much better than spreading extra money randomly. They differ in how much interest you pay and in how they feel along the way.
The two methods
Both methods follow the same mechanics:
- Pay the minimum on every debt, every month.
- Put all extra money toward one target debt.
- When the target is paid off, roll its whole payment into the next target.
The only difference is the order:
- Snowball: target the smallest balance first, regardless of interest rate.
- Avalanche: target the highest interest rate (APR) first, regardless of balance.
Worked example
Three debts and a total debt budget of $600 a month:
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Store card | $900 | 15% | $30 |
| Credit card | $4,000 | 24% | $100 |
| Car loan | $7,000 | 7% | $200 |
| Total | $11,900 | $330 |
Minimums take $330, leaving $270 extra each month.
- Snowball order: Store card ($900) → Credit card ($4,000) → Car loan ($7,000)
- Avalanche order: Credit card (24%) → Store card (15%) → Car loan (7%)
Results
Simulated month by month (interest accrues monthly at APR ÷ 12, then payments are applied):
| Method | Months to debt-free | Total interest |
|---|---|---|
| Avalanche | 22 months | $1,293 |
| Snowball | 23 months | $1,371 |
The avalanche saves about $78 in interest and finishes one month sooner. The snowball, though, clears the store card in about three months, a fast, visible win.
You can run your own debts through the free snowball vs avalanche calculator. It shows payoff order, months and interest for both methods.
Why the avalanche usually wins on math
Each dollar of extra payment "earns" the interest rate of the debt it pays down. Paying down a 24% card is like earning a guaranteed 24% return. Paying down a 7% car loan earns 7%. So sending extra money to the highest rate first minimizes total interest. The only time the two methods give the same result is when the smallest balance also has the highest rate.
Why the snowball still works for many people
Paying off debt takes months or years, and most plans fail because people stop, not because they picked a suboptimal order. Closing an account early:
- reduces the number of bills you have to think about
- frees up that minimum payment for the next debt
- gives a feeling of progress that helps you keep going
If the interest difference is small, as in the example above, the method you'll actually stick with is the better one.
When the difference gets big
The gap between methods grows when:
- your largest balance also has the highest rate (for example a big credit card at 25%+), and
- your extra payment is small relative to the total debt, so the plan runs for many years.
In those cases the avalanche can save hundreds or thousands. Run both methods with your real numbers before deciding.
A hybrid approach
Some people start with a snowball to knock out one or two tiny balances quickly, then switch to avalanche for the rest. Since the calculator shows both orders, you can see what the hybrid would cost compared with pure avalanche.
How to find the extra money
The extra payment is the engine of both methods. The bigger it is, the faster everything goes. A few places it usually comes from:
- A clear monthly budget. The 50/30/20 budget calculator is a quick starting point: 20% of take-home pay for savings and debt.
- Redirecting raises, bonuses and tax refunds to debt.
- Cancelling unused subscriptions and moving that money to the target debt the same day.
Other things to check
- Balance transfers or consolidation loans can lower the rate, but read the fees and the rate after any promotional period. Treat a 0% promo as a deadline.
- Emergency fund. Without a small cash buffer, a surprise expense goes back on the card. Many people keep a starter emergency fund while paying debt down.
- Fixed-rate loans. For a mortgage or car loan, see how extra payments change the payoff date with the loan amortization calculator.
Frequently asked questions
Should I close credit cards after paying them off? It depends on your situation. Closing old accounts can affect some credit scoring factors, while keeping them open can tempt spending. Consider your own habits and local credit rules.
What if a debt has a promotional 0% rate? Treat the promo end date as a deadline. Make sure the balance is gone before the rate jumps, or count it at its post-promo rate when you choose the order.
Does paying off debt hurt my credit? Paying down balances generally helps factors like credit utilization. Each credit system is different, so check how scoring works in your country rather than relying on rules of thumb.
Can I switch methods halfway? Yes. Nothing locks you in. Re-run the numbers with your current balances and keep going with whichever order you'll follow.
Track it month by month
Write down each debt's balance on the same day each month. Seeing the total fall is motivating, whichever method you choose. The 2027 Budget Planner template includes a debt payoff tracker alongside your monthly budget and savings goals, so you can see where the extra money comes from and where it goes.
Educational example. Real results depend on your lenders' interest calculations, fees and any rate changes.