Use this free debt payoff calculator to see how quickly you can become debt-free using either the snowball or avalanche strategy.
Debt Payoff Calculator
Snowball vs Avalanche
Enter your debts and see a side-by-side comparison of both strategies — including total interest, payoff timeline, and a full milestone schedule.
Your Debts
Payment Settings
Side-by-Side Comparison
Total Balance Over Time
Both curves reach $0 at your projected debt-free month.
Payoff Milestone Summary
Showing first month, every 6-month checkpoint, and each debt payoff event. Download the CSV for the complete month-by-month schedule.
Payoff order (smallest balance first)
| Month # | Date | Focused Debt | Payment Made | Balance Left | Status |
|---|
Payoff order (highest interest rate first)
| Month # | Date | Focused Debt | Payment Made | Balance Left | Status |
|---|
Calculations assume fixed interest rates and that minimum payments remain constant.
Results are estimates for planning purposes — always verify totals with your lender.
What Is the Debt Snowball Method?
The debt snowball method is a debt payoff strategy where you pay off your debts in order from the smallest balance to the largest, regardless of interest rate. You make minimum payments on all debts, then throw any extra money at the smallest balance until it’s gone.
Once a debt is paid off, you “roll” that freed-up minimum payment onto the next smallest debt — creating a snowball effect that grows your payoff power over time.
How it works step-by-step:
- List all debts from smallest to largest balance
- Pay minimums on every debt each month
- Put every extra dollar toward the smallest debt
- When the smallest is paid off, roll its full payment to the next one
- Repeat until all debts are gone
Key advantage: Quick wins early on. Paying off a small debt in a few months provides a psychological boost that helps people stay committed to their plan.
What Is the Debt Avalanche Method?
The debt avalanche method focuses on paying debts in order of highest interest rate first, regardless of balance size. You still make minimum payments on everything, but direct all extra money toward the highest-rate debt.
Because high-interest debt costs you the most money per month, targeting it first reduces how much total interest you pay over time.
How it works step-by-step:
- List all debts from highest to lowest interest rate
- Pay minimums on every debt each month
- Put every extra dollar toward the highest-rate debt
- When that debt is paid off, apply its full payment to the next highest-rate debt
- Repeat until debt-free
Key advantage: Mathematically minimises the total interest you pay. In most scenarios, avalanche results in paying less interest and sometimes finishing faster than snowball.
Snowball vs Avalanche: Which Should You Choose?
The honest answer: it depends less on math and more on what keeps you going. Both methods use the same total monthly payment. The only difference is which debt you attack first.
| Factor | ❄️ Debt Snowball | 🏔️ Debt Avalanche |
|---|---|---|
| Payoff order | Smallest balance first | Highest interest rate first |
| Total interest paid | Usually higher | Usually lower |
| Time to first debt paid off | Often sooner (targets small balances) | May take longer initially |
| Psychological momentum | Strong — early wins keep you motivated | Weaker early on, stronger math |
| Best for | Anyone who benefits from visible progress | Anyone who can stay disciplined for a longer initial stretch |
A real worked example
Suppose you have three debts and can put $200/month total toward them:
- Store card: $800 balance @ 26% APR — minimum $25/mo
- Personal loan: $4,200 balance @ 11% APR — minimum $95/mo
- Car loan: $6,500 balance @ 5.9% APR — minimum $180/mo
Snowball order: Store card → Personal loan → Car loan (smallest to largest balance). You’d pay off the store card in about 5 months, which frees $25 to roll onto the personal loan.
Avalanche order: Store card → Personal loan → Car loan (as it happens, the same order here because the smallest balance also has the highest rate). In many real debt mixes the order differs more significantly — that’s when the interest savings become meaningful.
When the order differs significantly — say, a $12,000 car loan at 18% APR sitting behind a $500 medical bill at 0% — avalanche can save hundreds in interest. Enter your actual numbers above to see what the difference is for your situation.
The research perspective
Behavioural finance research consistently finds that the snowball method produces better real-world completion rates. Paying off even a small debt changes how people feel about their financial situation — that emotional shift makes the next payment easier. A plan you stick with beats a plan you abandon, regardless of which is mathematically optimal.
That said, if your debts carry very different interest rates, the avalanche method can save a meaningful amount over time. Use this calculator to see the exact dollar difference for your specific debts — then make the call based on which number feels more compelling to you.