Compare debt-payoff methods under clear assumptions

Read the model before the payoff date

A payoff schedule is only as meaningful as its assumptions. Nepocore uses entered balances, annual percentage rates and fixed monthly minimum amounts. Each modeled month adds interest using APR divided by 12, pays minimums where possible and applies the remaining fixed payment budget according to the chosen priority.

The model excludes fees, new borrowing, changing rates, daily interest conventions, promotional terms and lender-specific minimum formulas. Actual statements can differ. Use the output to compare arithmetic scenarios, rather than treating the final month as a lender’s payoff quote or personal financial recommendation.

Check a one-debt example first

For a balance of 10,000 at 12% APR, the simplified monthly rate is 1%. The first month adds 100 of interest. A payment of 1000 leaves 9100 after that month. The next month’s interest is calculated on the new balance, with minor-unit rounding.

At zero APR, a 12,000 balance paid at 3000 per month takes four months under this model. These simple cases help you check that the inputs and units are correct before entering several debts. Use one currency throughout.

Understand the priority difference

Avalanche directs extra available payment toward the highest APR among remaining debts. Snowball directs it toward the smallest remaining balance. Minimum payments are handled first. When a debt is paid off, the tool retains the full monthly payment budget and reallocates the freed amount, rather than silently reducing future payments.

A final payment can be smaller than the full budget. The tool uses integer minor units for balances and rounded monthly interest. If the entered payment budget does not reduce the aggregate modeled balance, it asks for revised inputs instead of presenting an endless payoff date.

1. Enter a name, current balance, APR and fixed monthly minimum for each debt.
2. Add the extra monthly amount you intend to model.
3. Run one strategy and export the schedule.
4. Run the other with identical inputs.
5. Compare total modeled interest, months and assumptions.

Reconcile the result with real terms

A lender may calculate interest daily, change required payments or apply payments differently. Check fees, due dates, rate changes and payoff instructions directly with the lender. Do not omit an obligation because it makes the modeled schedule look better.

The tool supports a bounded number of debts and months to keep the calculation practical. It does not connect to accounts or make payments. Keep sensitive account numbers out of labels, preserve your source statements and revisit the scenario when balances or terms change. For decisions with material consequences, obtain appropriate independent guidance rather than relying on a simplified browser model alone.