Credit Card Interest Calculator
Calculate credit card interest charges, daily periodic rates (DPR), and payoff timelines. Compare minimum payments against fixed monthly payments to see how much money and time you can save free.
Credit Card Payoff Inputs
Month-by-Month Amortization Schedule36 Total Payments
| Month | Payment | Interest | Principal | Remaining Balance |
|---|---|---|---|---|
| 1 | $200.00 | $104.13 | $95.88 | $4,904.13 |
| 2 | $200.00 | $102.13 | $97.87 | $4,806.25 |
| 3 | $200.00 | $100.09 | $99.91 | $4,706.34 |
| 4 | $200.00 | $98.01 | $101.99 | $4,604.35 |
| 5 | $200.00 | $95.89 | $104.11 | $4,500.24 |
| 6 | $200.00 | $93.72 | $106.28 | $4,393.96 |
| 7 | $200.00 | $91.50 | $108.50 | $4,285.46 |
| 8 | $200.00 | $89.24 | $110.76 | $4,174.71 |
| 9 | $200.00 | $86.94 | $113.06 | $4,061.64 |
| 10 | $200.00 | $84.58 | $115.42 | $3,946.23 |
| 11 | $200.00 | $82.18 | $117.82 | $3,828.41 |
| 12 | $200.00 | $79.73 | $120.27 | $3,708.13 |
| 13 | $200.00 | $77.22 | $122.78 | $3,585.36 |
| 14 | $200.00 | $74.67 | $125.33 | $3,460.02 |
| 15 | $200.00 | $72.05 | $127.95 | $3,332.08 |
| 16 | $200.00 | $69.39 | $130.61 | $3,201.47 |
| 17 | $200.00 | $66.67 | $133.33 | $3,068.14 |
| 18 | $200.00 | $63.89 | $136.11 | $2,932.03 |
| 19 | $200.00 | $61.06 | $138.94 | $2,793.09 |
| 20 | $200.00 | $58.17 | $141.83 | $2,651.26 |
| 21 | $200.00 | $55.21 | $144.79 | $2,506.47 |
| 22 | $200.00 | $52.20 | $147.80 | $2,358.67 |
| 23 | $200.00 | $49.12 | $150.88 | $2,207.79 |
| 24 | $200.00 | $45.98 | $154.02 | $2,053.76 |
| 25 | $200.00 | $42.77 | $157.23 | $1,896.53 |
| 26 | $200.00 | $39.50 | $160.50 | $1,736.03 |
| 27 | $200.00 | $36.15 | $163.85 | $1,572.18 |
| 28 | $200.00 | $32.74 | $167.26 | $1,404.92 |
| 29 | $200.00 | $29.26 | $170.74 | $1,234.18 |
| 30 | $200.00 | $25.70 | $174.30 | $1,059.88 |
| 31 | $200.00 | $22.07 | $177.93 | $881.95 |
| 32 | $200.00 | $18.37 | $181.63 | $700.32 |
| 33 | $200.00 | $14.58 | $185.42 | $514.90 |
| 34 | $200.00 | $10.72 | $189.28 | $325.63 |
| 35 | $200.00 | $6.78 | $193.22 | $132.41 |
| 36 | $135.16 | $2.76 | $132.41 | $0.00 |
Quick Answer: How is Credit Card Interest Calculated Daily?
Credit Card Interest is calculated daily using your Daily Periodic Rate (DPR), which equals your Annual Percentage Rate (APR) divided by 365 days: DPR = APR / 365. Card issuers multiply your DPR by your Average Daily Balance (ADB) for each day in the billing cycle. For example, a $5,000 balance at 24% APR accrues approximately $3.29 per day in interest charges.
Understanding Credit Card Mechanics: DPR, ADB & Minimum Trap
Managing revolving debt requires understanding how credit card companies calculate finance charges:
- Daily Periodic Rate (DPR): The exact interest percentage applied to your balance each day:
DPR = APR / 365. - Average Daily Balance (ADB): The sum of your daily balances during the billing cycle divided by the number of days in the cycle.
- The Minimum Payment Trap: Minimum monthly payments (typically 2% of the balance or $35) are designed to cover monthly interest with very little going toward principal reduction. Paying only the minimum can extend debt payoff timelines to 15–20 years and double total costs.
- Grace Period: The interest-free window (usually 21–25 days) between your billing cycle closing date and your payment due date. If you pay your balance in full every month, no interest is charged.
Credit Card Payoff Strategy Comparison Table
Compare standard strategies for paying off credit card revolving balances:
| Payoff Strategy | Monthly Payment Method | Total Interest Savings | Best For |
|---|---|---|---|
| Minimum Only | 2% of balance or $35 minimum | Lowest (Max Interest Paid) | Emergency Liquidity Shortfall |
| Fixed Monthly Target | Constant fixed monthly amount ($200+) | High (Saves 60%–80% Interest) | Disciplined Monthly Budgeting |
| 0% Balance Transfer | Move debt to 0% promo APR card | Maximum (0% Interest during promo) | Good Credit Score Borrowers |
| Debt Avalanche | Pay minimums on all; excess to highest APR | Optimal Mathematical Savings | Multiple High-APR Credit Cards |
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Frequently Asked Questions
Common questions and answers about the Credit Card Interest Calculator.
How is credit card interest calculated daily?
Credit card interest is compounded daily using your Daily Periodic Rate (DPR), which equals your Annual Percentage Rate (APR) divided by 365 days: DPR = APR / 365. The daily rate is multiplied by your Average Daily Balance for each day in the billing cycle.
What is the Minimum Payment Trap?
Credit card minimum payments are usually set to 2% to 3% of your balance. Because most of this payment covers monthly interest, paying only the minimum can extend your payoff timeline to 15–20 years and double or triple your total interest paid.
What is a credit card grace period?
A grace period is the window between the end of your billing cycle and your payment due date (typically 21–25 days). If you pay your full balance by the due date, no interest is charged on new purchases.
How can I pay off credit card debt faster?
Pay more than the minimum required balance each month, switch to a 0% APR balance transfer card, or use debt payoff strategies like the Debt Avalanche (paying highest APR first) or Debt Snowball (paying smallest balance first).
Is my credit card financial data stored or shared?
No! RaikTools Credit Card Interest Calculator operates 100% locally inside your web browser. Your balances, interest rates, and financial figures are never uploaded or stored on any server.