Debt Snowball vs Avalanche Calculator

Months to debt-freesnowball order Debt 2 → Debt 3 → Debt 1 · total interest $4,233.22

Debt 1 balancecurrencyDebt 1 APR%Debt 1 minimum paymentcurrency/monthDebt 2 balancecurrencyDebt 2 APR%Debt 2 minimum paymentcurrency/month

Live math canvas

Your numbers, formula and explanation together

Debt Snowball vs Avalanche Calculator: 31 months to debt-free. snowball order Debt 2 → Debt 3 → Debt 1 · total interest $4,233.22

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Pay the minimum on every debt each month. Snowball directs the extra payment to the smallest remaining balance first; avalanche directs it to the highest interest rate first. When a debt reaches zero, its minimum payment is added to the extra-payment pool for the next debt in the chosen order. Repeat monthly until every balance reaches zero.

Apply the formulaPay the minimum on every debt each month. Snowball directs the extra payment to the smallest remaining balance first; avalanche directs it to the highest interest rate first. When a debt reaches zero, its minimum payment is added to the extra-payment pool for the next debt in the chosen order. Repeat monthly until every balance reaches zero.31 months to debt-freesnowball order Debt 2 → Debt 3 → Debt 1 · total interest $4,233.22

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Debt 1 balance: 8,000 currency
Debt 1 APR: 24 %
Debt 1 minimum payment: 200 currency/month
Debt 2 balance: 1,500 currency
Debt 2 APR: 5 %
Debt 2 minimum payment: 50 currency/month
Debt 3 balance: 5,000 currency
Debt 3 APR: 12 %

Resulting answer

31 months to debt-free

snowball order Debt 2 → Debt 3 → Debt 1 · total interest $4,233.22

Answer: 31 months to debt-free
Live support: snowball order Debt 2 → Debt 3 → Debt 1 · total interest $4,233.22

Assumptions used

What this answer assumes

Best for comparing debt-payoff strategies before committing to one, and for seeing in months and dollars what choosing psychology (snowball) over math (avalanche) actually costs.

Interest accrues monthly on the remaining balance at the entered annual rate divided by twelve.
The extra monthly payment plus any freed-up minimum payments is applied only to one target debt at a time, in the order the chosen method selects.
Minimum payments are assumed to stay constant for the life of each debt.
This page supports up to three debts; consolidate similar small debts to fit more into one line if needed.
This is a payoff-strategy comparison for planning, not a debt-management plan, credit counselling service or guaranteed payoff date.

Master’s Tip

How to use the result well

Master's Tip: avalanche almost always saves more interest, but snowball's fast small wins can matter more for sticking with the plan. Run both and pick the one you will actually follow through to zero.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Debt 1 balance: 8,000 currency
Debt 1 APR: 24 %
Debt 1 minimum payment: 200 currency/month
Debt 2 balance: 1,500 currency

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Explain it like I'm 12

This calculator runs your debts through two payoff plans at once: pay off the smallest balance first (snowball), or pay off the highest interest rate first (avalanche). It shows how many months each plan takes and how much interest each one costs.

Why people use this calculator

Debt payoff planning: decide which strategy to commit to before starting a multi-year payoff plan.
Motivation check: see the real cost, in months and interest, of choosing quick wins over the mathematically optimal order.
Extra-payment planning: test how a larger or smaller extra monthly payment changes the payoff timeline under either method.
Credit card and loan consolidation review: compare current balances against a consolidation loan's rate and term.

Common mistakes

Assuming snowball and avalanche always give very different results — when rates are similar, the two methods converge.
Forgetting that a paid-off debt's minimum payment should roll into the next target, not disappear from the budget.
Ignoring promotional 0% interest periods or balance-transfer fees, which this general-purpose formula does not model.
Comparing only total interest and ignoring which method you are actually likely to stick with for years.

Citation sentence

CalculationTime simulates debt snowball (smallest balance first) and debt avalanche (highest interest rate first) payoff strategies month by month, rolling each paid-off debt's minimum payment into the next target debt in the chosen order.

Source references

Consumer Financial Protection Bureau — Strategies for paying off debt — consumer debt repayment guidance

Formula

Pay the minimum on every debt each month. Snowball directs the extra payment to the smallest remaining balance first; avalanche directs it to the highest interest rate first. When a debt reaches zero, its minimum payment is added to the extra-payment pool for the next debt in the chosen order. Repeat monthly until every balance reaches zero.

Worked example

For an 8,000 balance at 24% APR, a 1,500 balance at 5% APR and a 5,000 balance at 12% APR, each with its stated minimum payment and a 250 extra monthly payment: snowball (smallest balance first: Debt 2, then Debt 3, then Debt 1) reaches debt-free in 31 months with about 4,233.22 total interest. Avalanche (highest rate first: Debt 1, then Debt 3, then Debt 2) reaches debt-free in 29 months with about 3,144.03 total interest, because it attacks the 24% balance first.

Professional note

Regional and unit assumptions

Standard or basis: general amortizing-debt arithmetic for up to three balances. It does not model promotional 0% periods, balance-transfer fees, penalty rates or minimum-payment formulas that change as a balance falls.

Method comparison

Snowball vs avalanche, side by side

Same debts, same extra payment — the only difference is which balance gets attacked first.

Months to debt-free

Snowball: 31

Avalanche: 29

Total interest paid ($)

Snowball: 4,233.22

Avalanche: 3,144.03

Assumptions and limitations

Interest accrues monthly on the remaining balance at the entered annual rate divided by twelve.
The extra monthly payment plus any freed-up minimum payments is applied only to one target debt at a time, in the order the chosen method selects.
Minimum payments are assumed to stay constant for the life of each debt.
This page supports up to three debts; consolidate similar small debts to fit more into one line if needed.
This is a payoff-strategy comparison for planning, not a debt-management plan, credit counselling service or guaranteed payoff date.

Methodology & Accuracy

How this calculator is checked

CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.

Formula used

Standard or basis

Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.

Master's Tip

Questions

What is the difference between debt snowball and debt avalanche?

Snowball pays off the smallest balance first regardless of rate, for quick wins. Avalanche pays off the highest interest rate first, which usually costs less in total interest.

Which method is mathematically better?

Avalanche almost always results in less total interest and, often, a slightly faster payoff, because it eliminates the most expensive debt sooner.

Why do people still choose snowball if avalanche saves more?

Snowball can build momentum and motivation by clearing a whole debt quickly, which some people find easier to stick with than a purely mathematical order.

What happens to a minimum payment once a debt is paid off?

That minimum payment is added to the extra-payment pool and redirected to the next debt in the chosen order, so the total monthly payment stays the same throughout.

Can I use this for more than three debts?

This page supports three debt lines. For more debts, group similar small balances together or run the largest debts through this page and estimate the rest separately.

Calculation note

The debt snowball method was popularised by personal-finance broadcaster Dave Ramsey as a behavioural strategy, while debt avalanche represents the mathematically optimal order economists and financial planners generally recommend when interest cost is the only goal.

Snowball optimises for momentum

By clearing the smallest balance first, snowball produces an early visible win, which behavioural-finance research links to higher follow-through on multi-year payoff plans.

Avalanche optimises for total cost

By targeting the highest interest rate first, avalanche minimises the interest that accrues across the whole payoff period, which is the standard advice when interest cost is the only priority.

The gap between methods grows with rate spread

When all debts carry similar rates, the two methods produce nearly identical results. The bigger the spread between the highest and lowest rate, the more avalanche pulls ahead on total interest saved.

Sources and further readingConsumer Financial Protection Bureau — Strategies for paying off debt Journal of Marketing Research — Consumers and debt repayment strategies (Gal & McShane, 2012)