Credit Card Payoff Calculator
Calculate how long it takes to pay off credit card debt, see total interest paid, explore minimum payment assumptions, and discover how extra monthly payments can shave years off your payoff timeline.
Card Parameters
The total outstanding balance on your credit card statement.
The annual interest rate charged on your credit card balance.
The fixed dollar amount you commit to paying each month until paid in full.
Est. 1st month accrued interest: $140.00
Additional money paid each month on top of your scheduled payment.
What-If Extra Monthly Payment Explorer
See how adding an extra amount each month changes your debt-free date and interest savings.
What If?
Change an input to see how the result changes.
Extra Payment Comparison Matrix
Compare how different prepayment amounts accelerate your payoff time and reduce total interest.
| Scenario | Monthly Outlay | Payoff Time | Total Interest | Total Paid | Interest Saved |
|---|---|---|---|---|---|
| Base Plan ($0 Extra) | $250.00 | 45 mos | $3,598.13 | $11,098.13 | — |
| +$25/mo Extra | $275.00 | 39 mos | $3,080.03 | $10,580.03 | $518.10 |
| +$50/mo Extra | $300.00 | 34 mos | $2,696.67 | $10,196.67 | $901.46 |
| +$100/mo Extra | $350.00 | 28 mos | $2,167.86 | $9,667.86 | $1,430.27 |
| +$250/mo Extra | $500.00 | 18 mos | $1,381.93 | $8,881.93 | $2,216.20 |
| +$500/mo Extra | $750.00 | 12 mos | $879.69 | $8,379.69 | $2,718.44 |
Amortization Schedule
Month-by-month repayment breakdown from starting balance to zero.
| Year | Start Balance | Principal Paid | Interest Paid | Total Payments | Ending Balance |
|---|---|---|---|---|---|
| Year 1 | $7,500.00 | $1,464.32 | $1,535.68 | $3,000.00 | $6,035.68 |
| Year 2 | $6,035.68 | $1,828.19 | $1,171.81 | $3,000.00 | $4,207.50 |
| Year 3 | $4,207.50 | $2,282.47 | $717.53 | $3,000.00 | $1,925.02 |
| Year 4 | $1,925.02 | $1,925.02 | $173.11 | $2,098.13 | $0.00 |
How Credit Card Payoff Is Calculated
Credit cards do not function like fixed-installment amortizing loans (such as mortgages or auto loans). Instead, interest accrues continuously on your balance, and each monthly payment is split between financing charges and principal repayment:
- Monthly Periodic Rate: Your stated annual percentage rate (APR) is divided by 12 billing periods (monthly rate = APR divided by 12).
- Interest Accrual: For the monthly billing period, accrued interest equals your starting balance multiplied by the monthly rate (Interest = Balance x monthly rate).
- Payment Allocation: When you submit a payment, the accrued interest is satisfied first. Any remaining funds reduce the principal balance (Principal = Total Payment minus Interest).
- Balance Update: Your ending balance becomes (Ending Balance = Starting Balance minus Principal).
- Next Month Compounding: In the following billing cycle, interest is calculated solely on the lower new balance (the new lower balance), allowing a slightly larger portion of your fixed payment to go toward principal.
Why Minimum Payments Can Take Decades to Pay Off
Most US card issuers determine your minimum monthly payment using a formula such as 1.0% to 2.0% of your outstanding balance plus monthly interest (or a fixed minimum floor of $25 to $35).
Because the percentage component is tied to your declining balance, as your balance decreases, your required minimum payment drops along with it. In month 1 of a $10,000 balance at 24% APR, the minimum payment is roughly $300 ($100 principal + $200 interest). But as the balance drops to $5,000, the required payment shrinks to $150 ($50 principal + $100 interest).
This dynamic deceleration prevents the rapid compounding of principal payoff. By maintaining a fixed monthly payment instead of letting your payment drop with the statement minimum, you dramatically compress your payoff timeline and eliminate thousands in interest.
Simplified Model Assumptions & Disclosures
This calculator uses a simplified monthly-interest model based on the assumptions you enter. Actual credit-card issuers may calculate interest using daily periodic rates, average daily balance, statement-cycle timing, fees, promotional APRs, changing APRs, and issuer-specific minimum-payment rules.
The projections provided are intended for educational and financial estimation purposes only and do not constitute formal lending offers or contractual payoff guarantees.
Calculation Methodology & Mathematical Formulas
Fixed Monthly Payment Mode
For fixed payment M and monthly rate r = APR / 1200:
- Interest: I = Balance × r
- Principal: P = (Monthly Payment + Extra) - I
- Ending Balance: Balance - P
- Payoff condition: Ending Balance ≤ 0
Dynamic Minimum Payment Mode
Calculated dynamically each month:
- Interest Comp: I = Balance × r
- Pct Comp: Balance × (Min Pct / 100)
- Base Min: max(Pct Comp + I, Floor)
- Total Payment: Base Min + Extra
Frequently Asked Questions
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Learn More About This Calculation
A clear explanation of credit card finance charges: Daily Periodic Rates (DPR), average daily balance calculations, and how the grace period protects you from paying interest.
See why paying only the minimum payment keeps you trapped in credit card debt for decades, and how fixing your monthly payment slashes years off your debt timeline.
Compare the mathematical Debt Avalanche method against the psychological Debt Snowball method to eliminate credit cards and personal loans faster.