Credit Card Interest Calculator
Credit card interest compounds monthly and can double what you originally spent if you only make minimum payments. This calculator shows your exact payoff timeline and total interest cost, then shows what happens when you add just $50 or $100 more per month.
Minimum to avoid growing: $105/mo
$150/mo
Payoff time
4y 10m
Interest paid
$3,700
Total paid
$8,700
$200/mo
Payoff time
3y 0m
Interest paid
$2,200
Total paid
$7,200
$250/mo
Payoff time
2y 3m
Interest paid
$1,750
Total paid
$6,750
What the numbers show
At 24.99% APR, your balance is costing you $104/month in interest before you pay a dollar toward the actual debt. Adding just $100/month cuts your total interest by $1,950 and pays it off 31 months sooner.
What you can actually change
Monthly payment — The biggest lever. Every extra dollar goes directly to eliminating the balance, not just servicing interest.
APR (via balance transfer) — Many cards offer 0% intro APR for 12–18 months. If your credit is solid, transferring to one can save hundreds — look for low transfer fees.
Your next step
Commit to paying $200/month. That saves $1,500 in interest.
Set it as a recurring payment so it happens automatically. Then put any extra cash toward this before anything else — the guaranteed return beats any investment at 24.99% interest.
Assumes fixed APR and consistent monthly payment. Does not account for new charges.
Ready to take action?
Build a debt payoff plan
Avalanche or snowball: find the order that gets you out fastest.