Check Credit Card Payoff
The calculator estimates payoff time and interest using the balance, APR and payment. Actual card calculations can differ because issuers may use daily balances.
Formula: Interest per period = Balance Γ APR Γ· 12; New balance = Balance + Interest β Payment
Keep the input format consistent with the calculation method and avoid rounding values earlier than necessary.
A quick hand calculation based on the formula above is enough to confirm the main arithmetic.