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What does the Debt snowball vs avalanche calculate?
Which debt payoff order is faster or cheaper? This calculator uses smaller debt balance, smaller debt apr, larger debt balance, larger debt apr, and total monthly payment to estimate payoff strategy comparison immediately in your browser.
With the values currently entered, the result is Avalanche — costs less interest. It also shows avalanche interest, snowball interest, and estimated saving.
How to use the Debt snowball vs avalanche
- Replace the example values with your own numbers.
- Review the result and supporting figures as they update automatically.
- Check the formula and assumptions before using the estimate for a decision.
Inputs used
- Smaller debt balance
- Smaller debt APR — entered in %
- Larger debt balance
- Larger debt APR — entered in %
- Total monthly payment
Debt snowball vs avalanche formula
Simulate monthly interest while directing extra payment to the smallest balance or highest APR
Assumptions
- Minimum payments are approximated as interest plus 1% of balance.
- No new borrowing occurs.
Practical guide
Debt snowball vs avalanche example and edge cases
Which debt payoff order is faster or cheaper? Let's use a concrete example, then look at the assumptions that can move the answer.
Example: A practical debt snowball vs avalanche scenario
For this example, use smaller debt balance of 3,200, smaller debt apr of 8 %, larger debt balance of 9,800, larger debt apr of 22 %, and total monthly payment of 650. These are starting values, so replace them with numbers that match your situation.
- Smaller debt balance
- 3,200
- Smaller debt APR
- 8 %
- Larger debt balance
- 9,800
- Larger debt APR
- 22 %
- Total monthly payment
- 650
Calculated resultAvalanchecosts less interest
Start with costs less interest. Then check avalanche interest, snowball interest, and estimated saving to understand what sits behind the main result.
Example results use the default display profile. The calculator above follows your selected country and units.
How to read the result
- Read the main result first. The supporting figures for avalanche interest, snowball interest, and estimated saving explain how the estimate is built.
- The method is Simulate monthly interest while directing extra payment to the smallest balance or highest APR. Keep the units consistent and use values from the same time period.
Edge cases worth checking
When smaller debt balance is unusual
Minimum payments are approximated as interest plus 1% of balance. Double-check this input before relying on the result.
When total monthly payment is uncertain
No new borrowing occurs. Run a lower and higher value to see a useful range.
What changes the result most
Smaller debt balance
Use a current amount for smaller debt balance. Include fees or recurring costs that belong in the same figure.
Smaller debt APR
Test a lower and higher smaller debt apr. A small percentage change can move the final result more than expected.
Larger debt balance
Use a current amount for larger debt balance. Include fees or recurring costs that belong in the same figure.
Try a different scenario
Small changes show whether the answer is stable or sensitive.
Smaller debt balance: 10% lower
2,880Avalanchecosts less interest
Smaller debt balance: 10% higher
3,520Avalanchecosts less interest
Smaller debt APR: 10% higher
9 %Avalanchecosts less interest
Common mistakes
Check smaller debt balance
Minimum payments are approximated as interest plus 1% of balance. Make sure this matches the number you enter.
Keep total monthly payment consistent
No new borrowing occurs. Use the same units and time period throughout the calculation.
Do not rely on one debt snowball vs avalanche scenario
Run a cautious case and an optimistic case. The range is often more useful than one exact-looking number.
Use this result well
Which debt payoff order is faster or cheaper?
It is a planning estimate, not a forecast or personal financial advice.