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Debt Calculators

Debt Snowball Calculator

Pay debts smallest-to-largest with a snowball strategy. Project the payoff order, timeline, and total interest for your full debt list.

Simulates payments month by month: minimum on every debt plus the entire extra payment piled onto the smallest active balance.

Your debts

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Snowball payoff
2 yr 3 mo
Pay off all 3 debts in 2 yr 3 mo with $2,312 total interest. Order: Credit card A → Credit card B → Auto loan.
Months to debt-free
2 yr 3 mo
Starting total balance
$14,500
Total interest
$2,312
Total paid
$16,812
Payoff order
#DebtStartingPaid offInterest
1Credit card A$800Month 3$26
2Credit card B$4,200Month 14$546
3Auto loan$9,500Month 27$1,739
Overview

How the Debt Snowball Calculator Works

The debt snowball pays the smallest balance first — even if it doesn't carry the highest interest rate — because closing accounts quickly produces momentum that keeps most people on plan. This calculator simulates the full payoff month by month so you can see the order, the timeline, and exactly how many months sooner the snowball makes you debt-free.

Formula

The Math Behind the Calculator

Each month: charge interest on every balance, pay each debt its minimum, then apply the entire remaining extra payment to the smallest active balance. When that debt hits zero, roll its minimum + the extra onto the next smallest. Repeat until all balances are zero.

Example

A Worked Example

Three debts — $800 at 22%, $4,200 at 18%, $9,500 at 12% — with $1,000/mo total budget pays off in ~17 months and ~$1,900 interest using snowball. The $800 card disappears in month 1, freeing its minimum to attack the next debt immediately.

How to use

How to Use the Debt Snowball Calculator

  1. 1List every debt: name, balance, APR, and current minimum payment.
  2. 2Enter the extra amount you can add on top of all minimums combined.
  3. 3Compare the snowball result to avalanche — snowball gives quick wins; avalanche saves the most money.
Interpretation

What the Results Mean

  • Payoff order is the sequence each debt is eliminated.
  • Months to debt-free is when the last debt hits zero given your monthly budget.
  • Total interest is the lifetime cost of carrying these balances under this plan.
Avoid

Common Mistakes to Avoid

  • Adding new debt while paying down old debt — the snowball stalls.
  • Picking snowball when avalanche would save hundreds; choose snowball only if you need the motivation of quick wins.
  • Underestimating minimums — if your budget is less than the sum of minimums, no strategy gets you out without renegotiating terms.
Keep going

Related Calculators

Debt Avalanche Calculator

Pay highest-APR debts first with an avalanche strategy. Project the optimal payoff order, timeline, and the total interest saved.

Debt Payoff Calculator

See exactly how long it will take to pay off any debt — and what the interest will cost you along the way.

Debt Consolidation Calculator

Compare paying off multiple debts individually against rolling them into a single consolidation loan — monthly payment, total interest, and projected savings.

Credit Card Payoff Calculator

Calculate how long it will take to pay off your credit card — or the payment needed to clear it by a target date.

FAQ

Frequently Asked Questions

Is snowball or avalanche better?+

Avalanche always saves more interest on paper. Snowball is better when behavioral momentum matters — and most people who finish a snowball never would have finished an avalanche.

What counts as a minimum payment?+

Use the actual minimum your statement shows. For credit cards it's typically 1–3% of the balance with a floor like $25.

Can I include the mortgage?+

You can, but most plans exclude the mortgage and focus on consumer debt. Mortgages have low rates and tax benefits that make rapid payoff less urgent.

Financial Disclaimer

This calculator is for educational and estimation purposes only. It does not provide financial, mortgage, tax, investment, or legal advice. Actual rates, payments, taxes, fees, insurance costs, eligibility, and loan terms vary by lender, location, credit profile, and market conditions. Always compare official offers and consult a qualified professional before making financial decisions.

Last updated June 2026 · Prepared by the mCalculator Editorial Team