Debt Snowball vs Avalanche Calculator
Compare the debt snowball and debt avalanche side by side: see the payoff order, the total interest each costs, and how much the avalanche saves on up to four debts.
The debt snowball pays the smallest balance first for quick wins; the debt avalanche pays the highest interest rate first to minimize total interest. Both keep your total monthly payment level and roll each freed-up minimum into the next debt. This calculator runs both on up to four debts and shows the payoff order, the months to debt-free, and the interest the avalanche saves.
Interest saved with avalanche
$436.48
How much less interest the avalanche costs than the snowball, with the same debts and budget.
- Snowball payoff time
- 26 months
- Avalanche payoff time
- 25 months
- Snowball total interest
- $1,983.33
- Avalanche total interest
- $1,546.85
- Snowball payoff order
- Debt 3, Debt 2, Debt 1
- Avalanche payoff order
- Debt 1, Debt 3, Debt 2
- Monthly payment budget
- $410.00
- Total debt entered
- $8,500.00
Assumptions
- Both strategies use a constant-outlay rollover. Your monthly budget is the sum of every debt's minimum payment plus your extra payment, and it stays the same each month until all debts are paid. Each month, interest is added to every unpaid debt (rounded to the cent), every active debt is paid its minimum, and all the leftover money, including minimums freed up by debts already paid off, is thrown at one target debt.
- The strategies differ only in which debt is the target. The snowball targets the smallest balance first; the avalanche targets the highest interest rate first. Because they spend the same total each month, the avalanche always pays the same or less total interest, while the snowball can clear an individual small debt sooner for motivation.
- Up to four debts are supported. Any debt slot with a balance of zero is ignored, so you can enter fewer than four. Each debt uses its own balance, annual rate (APR), and minimum payment.
- Payoff order is the order debts are actually cleared, which can differ from the targeting order: a small debt can be cleared by its own minimum payment before the strategy ever targets it. Interest accrues monthly at the APR divided by 12, and each debt's balance lands at exactly zero when paid.
- The calculator assumes the minimums and the extra payment are fixed for the whole payoff, no new charges are added to any balance, and there are no late fees, promotional rates, or balance transfers. All figures are nominal dollars, not adjusted for inflation or taxes.
- If your monthly budget is too small to cover the interest that accrues, a balance can fail to fall; the simulation stops after a long safety horizon. Enter a budget that comfortably exceeds total monthly interest for a meaningful result.
- This is an estimate for educational purposes only, not financial advice. Your actual interest, minimum payments, and fees will differ. The best strategy is the one you will stick with.
Key terms
Definitions for the terms this calculator uses, in our finance glossary .
How it works
Both the snowball and the avalanche use the same engine, a constant-outlay rollover, and differ only in which debt they attack first.
Your monthly budget is the sum of every debt’s minimum payment plus the extra you choose to add, and it stays constant for the whole payoff. Each month the calculator adds interest to every unpaid debt (the APR divided by 12, rounded to the cent), pays the minimum on each one, and then throws all the leftover money at a single target debt. As debts are paid off, their freed-up minimums stay in the budget and roll into the target, which is why the payoff speeds up over time. That rolling effect is the “snowball.”
The only difference between the methods is the target:
- The snowball targets the smallest balance first. Clearing whole debts quickly is motivating, which helps people stay with the plan.
- The avalanche targets the highest interest rate first. Removing the most expensive interest soonest costs the least in total.
Because both spend the same amount each month, the avalanche always pays the same or less total interest than the snowball. The payoff order shown is the order debts are actually cleared, which can differ from the targeting order: a small debt can be finished by its own minimum payment before the strategy ever targets it.
Worked example
Suppose you have three debts and can put $200 a month above the minimums toward them:
- Debt 1: $5,000 at 22% APR, $100 minimum
- Debt 2: $2,500 at 12% APR, $60 minimum
- Debt 3: $1,000 at 5% APR, $50 minimum
Your monthly budget is $100 + $60 + $50 + $200 = $410, held constant until everything is paid.
- The snowball attacks Debt 3 first (smallest balance), then Debt 2, then Debt 1. It clears all three in 26 months and costs $1,983.33 in interest.
- The avalanche attacks Debt 1 first (highest rate). It clears everything in 25 months and costs $1,546.85 in interest.
The avalanche saves $436.48 here. The gap widens when the highest-rate debt is large, and narrows when balances and rates are close, in which case the method you will actually stick with is the better choice.
What is included (and what is not)
Up to four debts are supported, and a zero-balance slot is ignored. The calculator assumes the minimums and the extra payment are fixed, no new charges are added, and there are no late fees, promotional rates, or balance transfers. Interest accrues monthly and each balance lands at exactly zero when paid. If the budget cannot cover the interest that accrues, the simulation stops after a long safety horizon, so enter a budget that comfortably exceeds total monthly interest. All figures are nominal dollars and are estimates for education, not advice.
Sources
- Consumer Financial Protection Bureau, How do I negotiate or pay down my debt?
- Consumer Financial Protection Bureau, Debt collection and managing debt
- Standard constant-payment debt rollover (the snowball and avalanche methods).
Frequently asked questions
- What is the difference between the debt snowball and the debt avalanche?
- Both put every spare dollar toward one debt while paying minimums on the rest, then roll each paid-off debt's payment into the next. The snowball targets the smallest balance first, which clears individual debts quickly for motivation. The avalanche targets the highest interest rate first, which costs the least total interest. They use the same monthly budget, so the only trade-off is quick wins versus lowest cost.
- Which method saves more money?
- The avalanche, always or by a tie. Because both methods spend the same total each month, paying the highest-rate debt first removes the most expensive interest soonest, so the avalanche pays the least total interest. This calculator shows exactly how much it saves over the snowball for your debts.
- If the avalanche is cheaper, why would anyone choose the snowball?
- Because finishing a debt is motivating, and motivation is what keeps people going. Research popularized by behavioral studies and consumer advocates suggests many people stick with the snowball better because the early wins feel real. If the interest difference is small, the method you will actually follow to the end is the better one.
- Does adding more to the extra payment help either method?
- Yes, and it is the single biggest lever. The extra payment is what accelerates either strategy; raising it shortens both payoff times and cuts total interest under both methods. Try increasing the extra payment and watch both the months and the interest fall.
Related calculators
Learn how this works
New to this topic? Our companion guide explains it in plain language: The Credit Card Minimum Payment Trap (and How to Escape It)
Last reviewed June 2026.