How Expensive Is Credit Card Interest?
US credit card APRs average around 20–24% — among the highest consumer interest rates available. On a $5,000 balance:
| Payment Strategy | Monthly Payment | Payoff Time | Total Interest |
|---|
| Minimum only (2%) | Starts ~$100, decreases | Over 20 years | $6,000+ |
| Fixed $150/month | $150 | ~46 months | $1,800 |
| Fixed $300/month | $300 | ~20 months | $820 |
Paying only the minimum on $5,000 costs more in interest than the original balance — and takes two decades. That's the debt trap.
How to Calculate Your Payoff Timeline
Use the tool.tl Credit Card Payoff Calculator. Enter:
- Current balance
- Annual interest rate (APR — check your statement)
- Your planned monthly payment
- Minimum payment percentage (typically 1–3%)
The calculator shows payoff date and total interest for both your fixed payment plan vs. minimum-only — side by side, so the cost of making only minimum payments is impossible to ignore.
Why Minimum Payments Are a Trap
Minimum payments are calculated as a percentage of your balance (usually 1–3%). As your balance shrinks, so does the minimum — which means:
- You pay less and less each month, extending the timeline
- The vast majority of each payment goes to interest, not principal
- New interest compounds on the remaining balance every month
The key insight: With minimum payments, almost no money goes toward reducing your actual debt. Even adding $50 extra per month can save hundreds in interest and cut years off your payoff time.
Three Strategies to Pay Off Faster
The Avalanche Method (mathematically optimal)
Pay minimum on all cards, then throw every extra dollar at the highest-APR card first. Once it's paid off, redirect that payment to the next-highest. This minimizes total interest paid.
The Snowball Method (psychologically motivating)
Pay minimum on all cards, but target the smallest balance first regardless of rate. Each card you eliminate gives you a psychological win and frees up cash to attack the next one.
Balance Transfer
Move high-rate balances to a card with a 0% promotional APR (typically 12–21 months). Pay down the principal aggressively during the interest-free period. Watch for balance transfer fees (usually 3–5%) and what happens after the promo ends.
Credit Card APR by Region
| Region | Typical APR |
|---|
| United States | 20%–29% (recent highs) |
| United Kingdom | 20%–40% |
| Australia | 13%–22% |
| Japan | 15%–18% (legal max 18%) |
| Taiwan | 6.95%–15% (legal max 15%) |
Frequently Asked Questions
Does paying only the minimum hurt your credit score?
Paying at least the minimum on time keeps your account current — no late marks. But high credit utilization (balance-to-limit ratio) from carrying large balances does hurt your score. Keeping utilization under 30% is the standard guideline.
How is credit card interest calculated?
Most US cards use the Average Daily Balance method: your daily rate (APR ÷ 365) is multiplied by each day's balance and summed for the billing cycle. If you pay the full statement balance, no interest is charged (grace period). Any unpaid balance starts accruing interest immediately.
Is there a penalty for paying more than the minimum?
No. Unlike some loans, credit cards have no prepayment penalty. You can pay any amount above the minimum at any time — and the faster you pay, the less interest you owe.