United States version
What this tool answers
Begin with one outstanding balance and a monthly payment. The principal question is how many payments are needed, rather than which payment will hit a selected deadline.
Formula
Each month: interest = opening balance × APR / 12; apply the payment to interest and principal.
Worked example: Sixteen zero-interest payments
A $3,600 balance at 0% APR with a $225 monthly payment takes 16 payments to clear. This example excludes additional purchases and charges.
Load these worked-example inputs
Limitations
Actual cards can use daily interest, changing rates, minimum-payment rules and fees. No new spending is assumed. A payment that does not reduce principal will not clear the balance.
Frequently asked questions
What is fixed in this single-balance payoff example?
The starting balance, APR and monthly payment are supplied; the payoff duration is estimated.
How do new purchases affect the displayed payoff time?
They add debt that this no-new-purchases model does not include.
Why is one balance different from a multi-card payoff plan?
A multi-card plan must also choose how payments are distributed among balances with different rates and constraints.