How to Use the Credit Card Payoff Calculator
The Credit Card Payoff Calculator helps you understand exactly how long it will take to clear your credit card balance and how much total interest you'll pay under different repayment scenarios. It's a sobering but essential tool for managing high-interest debt.
Enter your current balance, the card's APR (Annual Percentage Rate), and either a fixed monthly payment or a target payoff date. The calculator shows your payoff timeline, total interest paid, and also shows the impact of paying more than the minimum each month.
The most important nuance is the devastating cost of minimum payments. On a £3,000 balance at 20% APR, paying only the minimum (typically 2% of balance or £25) could take over 27 years to clear and cost more than £3,000 in interest alone — more than the original debt. Always pay as much above the minimum as possible.
📊 Worked Example
$3,500 balance at 22% APR:
- Minimum payment only (~2%): 29+ years, $5,800 interest
- Fixed $100/month: 4.5 years, $1,890 interest
- Fixed $200/month: 1.9 years, $827 interest
- Fixed $350/month: 11 months, $428 interest
Common Use Cases
- ✅ Calculating how long it will take to clear existing credit card debt
- ✅ Comparing payoff timelines for different monthly payment amounts
- ✅ Deciding whether a balance transfer to a lower-rate card is worth the fee
- ✅ Understanding the true cost of only making minimum payments
- ✅ Planning a debt-free date and working backwards to set a monthly payment
- ✅ Motivating yourself by seeing exactly how much interest you save by paying more
Frequently Asked Questions
How is credit card interest calculated?
Credit card interest is usually calculated daily. Your APR is divided by 365 to get a daily rate, which is applied to your outstanding balance each day. At 20% APR, the daily rate is 0.0548%. On a $3,000 balance, that's about $1.64 in interest per day.
What is a minimum payment and why is it dangerous?
The minimum payment is the lowest amount your card issuer requires each month — typically 1–2% of your balance or a fixed minimum (e.g. £25). Paying only this keeps you in debt for decades because interest accrues faster than you repay principal.
Is a balance transfer worth it?
A balance transfer moves debt to a card with a lower or 0% introductory rate. If you can pay off the balance within the 0% period (typically 12–24 months), you save substantially. Watch for transfer fees (typically 2–3%) and ensure you pay off the full balance before the rate rises.
What APR is considered high for a credit card?
In the UK, rates above 25% APR are considered high; the average is around 22%. In the US, the average is around 21%. Store cards and cards for poor credit can exceed 40% APR. Rewards cards often carry higher rates — only worthwhile if you clear the balance monthly.
Should I pay off credit cards or invest first?
If your credit card APR exceeds the investment return you can reliably earn (typically 7–10% for stocks), paying off the card gives a guaranteed, risk-free 'return' equal to the APR saved. Most financial advisors recommend paying off high-interest debt before investing outside of employer-matched pensions.