VaultaJournal · Debt and Basics
Debt snowball vs avalanche, with a worked example
Two famous ways to clear several debts. One costs less, the other is easier to stick to. Here are the actual numbers side by side.
The Vaulta team · · 7 min read
When you owe money in several places, the question is not only whether to pay it off but in what order. Two methods dominate the conversation: the snowball and the avalanche. Both start the same way, and both end the same way. The path in between differs.
How each method works
First, pay the minimum on every debt. That is non-negotiable, because missed payments bring fees and damage. Then take every spare dollar and aim it at one debt:
- Snowball: target the smallest balance first. When it is gone, roll its payment onto the next smallest.
- Avalanche: target the highest interest rate first. When it is gone, roll its payment onto the next highest rate.
A worked example
Suppose you owe three things:
| Debt | Balance | Rate (APR) | Minimum |
|---|---|---|---|
| Personal loan | $1,500 | 6% | $50 |
| Credit card | $4,000 | 24% | $100 |
| Car loan | $7,000 | 9% | $170 |
The total owed is $12,500. The minimums add up to $320. You can afford $200 extra each month, so your fixed monthly budget for debt is $520, and it stays at $520 even as debts disappear (that is the "rolling" part).
We worked this through month by month, charging interest monthly at one twelfth of the APR and applying payments after interest. Results, rounded:
| Snowball | Avalanche | |
|---|---|---|
| First debt cleared | Loan, month 7 | Card, month 16 |
| Credit card cleared | Month 19 | Month 16 |
| Debt-free | Month 29 | Month 28 |
| Total interest paid | about $2,069 | about $1,778 |
The avalanche saves roughly $291 and finishes a month sooner. Real lenders compute interest slightly differently (daily balances, statement dates), so treat these as close estimates rather than exact.
So why does anyone choose the snowball?
Because paying off the personal loan in month 7 feels like something. You cross a debt off the list. One fewer envelope, one fewer login, $50 freed to put on the next target. The avalanche asks you to wait 16 months before the first win.
That matters because the best method is the one you finish. If a visible early victory keeps you going, $291 may be a fair price. If you are motivated by the numbers, the avalanche is the better tool. Either way, you are far ahead of paying only minimums.
A middle path
- Quick-win start: clear one tiny debt first to build momentum, then switch to the avalanche.
- Mind the gap: if two debts have similar rates, choose the smaller one. The cost difference is trivial and the psychological gain is real.
- Look beyond order: a lower rate through a balance transfer or consolidation can matter more than either method, but check fees and terms carefully.
Whatever you choose
- List every debt with balance, rate and minimum.
- Decide a fixed monthly debt budget and keep it constant as debts vanish.
- Automate the minimums so nothing is missed.
- Send the extra to one target.
- When a debt is cleared, add its payment to the next one rather than to your spending.
Hold a small starter emergency fund while you do it, so a flat tyre does not put you back on the card.
What the example leaves out
The numbers above are tidy on purpose. Real life adds complications you should plan for.
- Variable rates. Some cards and loans change their rate. Re-run the order when they do.
- Promotional rates. A zero-percent balance that jumps to a high rate in nine months should usually be cleared before that date, whatever the method says.
- Secured versus unsecured. Mortgages and car loans put an asset at risk if unpaid. Missing a payment on those is costlier than the interest suggests.
- Penalties. Check whether a loan charges for early repayment before sending extra money.
- Tax-deductible interest. In some places, interest on certain loans is deductible. That shifts the real cost; ask a local professional.
If you are unable to meet even the minimums, contact your lenders early. Many have hardship arrangements, and non-profit credit counselling services exist in many countries. Ignoring the problem is the one strategy that reliably makes it worse.
Questions to ask before you begin
- Is any debt past due, or at risk of default? Handle that first, whatever the method.
- What is the real rate on each debt, including fees? Cards often quote a monthly figure that looks small and is not.
- Can I make the monthly budget a fixed number I will keep paying, even after debts are cleared? That discipline is what makes the rolling effect work.
- How will I stop new balances appearing? Clearing a card and then using it again is the most common way this plan fails.
Write the answers down. A plan that is on paper is much harder to forget than one that lives in your head.
Not financial advice. This article is general education built on simple arithmetic. Your situation, local rules and tax treatment will differ, so check anything important with a qualified professional.