Mixed debt example
Credit card $4,200 at 24.9%, card $1,200 at 21.9%, student loan $9,800 at 5.5%, auto loan $7,200 at 7.9%
With $490 of minimums plus $150 extra, avalanche saves an estimated $49.10 in this reproducible example.
Strategy guide
Debt Snowball vs Avalanche Calculator: Which Saves More?
Published by Sonya · DebtPayoff.cc · Published: 2026-07-08 · Updated: 2026-10-04
Reviewed for calculation accuracy against the published method and automated tests
Snowball and avalanche use the same minimums and the same extra budget, but they answer different questions: which account closes first, and which ordering usually costs less interest. This page is the side-by-side decision, not a how-to for either method alone.
What each strategy optimizes
After every minimum is covered, snowball sends extra money to the smallest remaining balance. Avalanche sends that same extra money to the highest APR. Neither strategy skips a required minimum.
A fair comparison changes only the priority rule. If one side also changes the extra payment, the interest gap is no longer caused by the strategy.
Worked comparison: four accounts and $100 extra
Inputs, run on the production engine: a $450 store card at 27.99% with a $25 minimum, a $1,100 medical balance at 0% with a $50 minimum, a $2,400 personal loan at 9.9% with an $85 minimum, and a $6,800 card at 22.49% with a $170 minimum. Extra budget is $100, so the first-month total is $430.
Snowball closes the store card in month 4, the medical balance in month 10, and the loan in month 17, then finishes the card in month 33. Avalanche also closes the store card in month 4, but leaves the 0% medical balance until month 22 and finishes the 22.49% card in month 32. Estimated interest is $3,218.17 for snowball and $2,857.62 for avalanche: a $360.55 gap and one extra month.
The gap is large here because snowball spends months attacking a 0% balance while the expensive card keeps accruing. On other inputs the gap can be only a few dozen dollars. Read the table as this scenario, then rerun your own statements.
| Strategy | First extra-payment target | Months | Interest |
|---|---|---|---|
| Snowball | $450 store card at 27.99% | 33 | $3,218.17 |
| Avalanche | $450 store card at 27.99% | 32 | $2,857.62 |
| Minimums only | No extra payment | 47 | $4,668.60 |
Avalanche saves $360.55 in interest and finishes 1 month earlier in this scenario.
When the cheaper row is still the wrong plan
Avalanche is the lower-interest row in this scenario, but snowball produces three closed accounts by month 17. If that sequence is what keeps the $100 extra payment intact, the higher modeled interest can still be the plan you actually finish.
If you can follow the slower first win, keep avalanche and add a progress check that is not a new purchase: record principal paid, not just the next due date. Do not average the two results into a fake third plan.
- Educational estimate only. Not financial advice, a lender quote, or a credit-score prediction.
- Daily interest, fees, and payment posting dates can move both rows.
- Calculations stay in the browser. Nothing on this page is stored on a server.
What to open next
Use the snowball guide if you need the rollover rules for smallest-balance ordering. Use the avalanche guide if you need APR ordering, including what happens when the first target is not the smallest balance.
Use the methodology page before you treat any month count as a commitment. It states the APR divided by 12 approximation, the 1,200-month stop, and why a statement can disagree.
How it works
List all debts
Enter each balance, minimum monthly payment, and APR.
Add extra monthly budget
Choose how much extra you can reliably pay after minimums.
Choose a strategy
Compare snowball, avalanche, or a custom priority order.
Review the payoff plan
Check payoff month, total interest, charts, and the monthly schedule.
Export or share
Download CSV or PDF, or share a link with the exact scenario.
Real-world examples
Credit-card-heavy example
Card A $3,500 at 22.9%, card B $1,800 at 19.9%, personal loan $6,500 at 12.5%
Avalanche gains more value when high-rate balances dominate.
Common snowball mistakes
- Ignoring very high APR debt for too long.
- Choosing an extra payment that is not sustainable.
- Forgetting to roll freed minimum payments into the next target debt.
Common questions
How big should the interest gap be before avalanche is worth it?
There is no universal cutoff. In the worked example on this page, avalanche saves $360.55 and one month. If your own comparison shows a gap under about $50, the behavioral benefit of snowball's early wins may outweigh the savings. Run your real numbers in the calculator and decide based on your actual gap, not a rule of thumb.
Can I mix snowball and avalanche into a hybrid plan?
You can, but this page does not recommend it. Mixing the two methods makes it impossible to measure either benefit: you lose snowball's clean sequence of quick wins and avalanche's clean interest savings. Pick one ordering, run it in the calculator, and switch only if your circumstances genuinely change.
Do I need to recalculate if I switch strategies mid-plan?
Yes. Your balances and possibly your APRs have changed since you started, so the old comparison no longer applies. Enter your current balances, APRs, and minimums into the calculator and run a fresh comparison before committing to the new strategy.
When should I talk to my creditor instead of choosing a strategy?
If you cannot cover every minimum payment, if an account is already in collections, or if you are considering settlement or bankruptcy, the priority order is not the main problem. Contact your creditor about hardship options or speak with a qualified credit counselor before optimizing which debt gets the extra payment.
How this comparison was calculated
Both rows use APR divided by 12, minimums first, and the same $100 extra payment. Displayed dollars are rounded to cents. The minimum-only row is the same debts with a $0 extra payment.
The model does not switch promotional rates, add new purchases, or apply lender-specific payment waterfalls. Check current statements before changing a real payment.
- Only the priority rule changes between snowball and avalanche.
- A 0% balance can still be a snowball target if it is the smallest.
- Interest gaps from one scenario do not transfer to another.
- Educational only. Not financial advice.
Primary sources
- Debt action plan tool — Consumer Financial Protection Bureau (Last verified: 2026-10-04)
- How to reduce your debt — Consumer Financial Protection Bureau (Last verified: 2026-10-04)