How to use a debt payoff calculator
Start with the mode that matches the entries you have. Multiple debts (avalanche vs snowball) compares payment orders for at least two debts. Single card payoff handles one balance and shows its formula, assumptions, payoff date, interest, and monthly schedule.
Steps for planning debt payoff
- Select Multiple debts (avalanche vs snowball) or Single card payoff.
- In multiple-debt mode, fill in Name, Balance ($), APR (%), Min payment ($), and Monthly fee ($, optional). Click Add debt for another row. Remove debt deletes a row.
- Enter Extra monthly payment budget ($, optional), then choose Avalanche (highest APR first) or Snowball (smallest balance first) under Schedule to display.
- In single-card mode, enter Current balance ($), Annual percentage rate, APR (%), Minimum payment per month ($), Extra payment per month ($, optional), and Monthly fee ($, optional).
- Click Calculate to create the result. Use Copy result or Download result (.txt) for a text copy, or click Reset to clear the entries.
Avalanche vs snowball debt payoff
Avalanche sorts debts by highest APR first. Snowball sorts them by entered starting balance, smallest first. If balances tie, the higher APR comes first. The result always shows both payment orders, while Schedule to display selects the month-by-month schedule.
Input: Debt 1, $4,200 at 19.99%; Debt 2, $5,000 at 22.99%
Output: Avalanche order, Debt 2 then Debt 1
Snowball order, Debt 1 then Debt 2The monthly budget combines every Min payment ($) with Extra monthly payment budget ($, optional). Each open debt receives its APR-based interest and Monthly fee ($, optional) before payments are applied. Minimum payments come first. The remaining budget follows the selected order, and a paid debt's minimum payment stays available for the next debt.
What the debt payoff calculator checks
Balance and minimum payment must be greater than 0. APR must be between 0 and 100. Optional fees and extra payment fields accept 0 or greater. Blank debt rows are skipped, while a partly filled row must be completed or removed. Multiple debts needs at least two valid entries, and Add debt stops after 12 rows.
The multiple-debt check compares the total monthly budget with combined first-month interest. Fees enter the simulation after that check, so a recurring fee can still keep a balance open. Both modes stop after 1,200 simulated months.
What the payoff schedule includes
The calculator converts APR with r = APR / 100 / 12. Results show months to payoff, a date based on the browser's current date, total interest, and payment totals. Multiple-debt results include both payment-order tables and the selected schedule. Single card payoff also shows the formula and assumptions.
The entered figures stay in the browser while the calculation runs. The page uses fixed APRs, minimum payments, and recurring fees from your entries. It does not model new charges, missed payments, promotional rates, balance transfers, one-time payoff fees, or early-payoff penalties. Copy result and Download result (.txt) make the displayed text available outside the page.
Where debt payoff planning comes up
- Enter several card or loan balances to compare the two payment orders and see where the extra budget is applied first.
- Use Single card payoff with a current balance, APR, minimum, extra payment, and recurring fee to inspect each month's remaining balance.
- Change Extra monthly payment budget ($, optional), click Calculate, and compare the months and interest totals.
When another financial calculator fits better
Use Credit Card Payoff Calculator for one credit card's months and total interest. Use Amortization Calculator for a loan's period-by-period principal, interest, and balance schedule based on term and payment frequency. The Financial Calculators page lists other calculations.
Frequently asked questions
How does the debt payoff calculator compare avalanche and snowball?
It calculates both orders from the same debts and monthly budget. Avalanche uses highest APR first. Snowball uses the smallest entered starting balance first, with higher APR first when balances tie.
Can I use the calculator for one credit card?
Yes. Select Single card payoff and enter Current balance ($), Annual percentage rate, APR (%), Minimum payment per month ($), Extra payment per month ($, optional), and Monthly fee ($, optional).
How are monthly fees handled in a payoff plan?
Each entered Monthly fee ($, optional) is added to its open debt's balance every month before payments are applied. One-time payoff fees remain outside the calculation.
Why does my debt payoff calculation stop with an error?
The budget must exceed the first month's calculated interest in multiple-debt mode, or the first month's interest plus fee in Single card payoff. The simulation must finish within 1,200 months. Check incomplete rows, low payments, and recurring fees.