Finance & Money
Debt Snowball Calculator
Model two debts on separate monthly ledgers with their own balances, APRs, and required payments. The calculator targets the smaller live balance, rolls the full fixed debt budget forward, and reports account-level months and interest rather than a blended-rate approximation.
Total starting debt-
Monthly debt budget-
Account-level snowball payoff time (1,200 means not repaid within model cap)-
Account-level modeled interest-
Opening balance of first snowball target-
Exact scenario comparison
Recurring extra snowball payment scenarios
Exact scenario comparisonRecurring extra snowball payment changes while all other entered assumptions remain constant.
| Recurring extra snowball payment | Total starting debt | Monthly debt budget | Account-level snowball payoff time (1,200 means not repaid within model cap) | Account-level modeled interest | Opening balance of first snowball target |
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Period-by-period detail
Monthly schedule and annual summary
How to use Debt Snowball Calculator
- Enter each balance, APR, required monthly payment, and the recurring extra amount available across the plan.
- Confirm the first target is the smaller opening balance and that the total debt budget covers both accounts' monthly interest.
- Keep the same total budget after the first payoff so its released payment rolls into the surviving debt.
Calculator guide
Understanding Debt Snowball Calculator
A debt snowball works only when the smallest active balance receives every dollar left after the other account's required payment and the released payment stays in the debt budget after that account closes.
Calculation method
How the calculation works
Accrue interest separately on both debts, cover the non-target required payment, direct the remaining fixed debt budget to the smallest balance, and roll every released payment into the surviving balance. Accrue interest separately on both debts, cover the non-target required payment, direct the remaining fixed debt budget to the smallest balance, and roll every released payment into the surviving balance.
Worked situations
Practical examples
- Enter $3,500 and $12,000 as separate balances, then place the combined minimum payments in the required-payment field.
- If clearing the smaller debt will release a $95 minimum payment, keep it inside the monthly budget after payoff so it rolls to the larger balance.
- Test an extra payment that can be sustained in ordinary months rather than a one-time amount that will not recur.
Better inputs
Useful tips
- Confirm each account's current balance, APR, minimum payment, due date, and any promotional-rate expiration before using the estimate.
- Keep a small cash buffer so an unexpected expense does not immediately recreate revolving debt.
- Apply windfalls as separate principal reductions; do not describe a one-time payment as a recurring monthly snowball.
Before relying on the result
Limitations and common mistakes
- The engine models two account-level monthly ledgers, but it does not support more than two debts or changing contractual minimum formulas.
- Variable rates, daily compounding, late fees, new purchases, transfer offers, penalties, and changing minimum-payment formulas are excluded.
- The result is a planning estimate and not a lender statement, settlement proposal, credit recommendation, or guarantee of payoff timing.
Reference
Key terms
- Snowball payment
- Extra recurring cash directed to the smallest targeted balance and then rolled to the next balance after payoff.
- Required-payment budget
- Combined monthly minimum or scheduled payments that continue to be reserved throughout the plan.
- Priority balance
- The smallest active balance receiving the snowball remainder after the other required payment.
- Payoff horizon
- Number of modeled months until the combined balance reaches zero under the entered payment budget.
Important note
Calculated from the entered values and stated financial terms. It is not a product quote, lending decision, tax filing, or investment recommendation.
Frequently asked questions
Does the calculator pay the smaller debt first internally?
Yes. It accrues each account's own monthly interest, covers the other required payment, sends the remainder to the smaller live balance, and rolls the released budget after payoff.
Should minimum payments decrease after a balance is cleared?
No for a snowball plan. Continue reserving the same total monthly debt budget and redirect the released payment to the next balance.
Why might a lender statement show a different payoff date?
Separate APRs, daily interest, statement dates, payment timing, fees, and contractual minimum formulas differ from the blended monthly model.
Is snowball always the lowest-interest strategy?
Not necessarily. It prioritizes early balance closures; an avalanche strategy generally prioritizes higher APRs to reduce modeled interest.