Credit Card Payoff Calculator
Minimum payments vs a fixed payment — see the real difference
This calculator compares paying only the minimum on a credit card against a fixed monthly payment, using daily-compounding interest the way most cards actually calculate it, so you can see the real payoff time and interest cost of each approach.
Card Details
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Minimum-Only Payoff Time
0 mo
Minimum-Only Total Interest
$0
Fixed Payment Payoff Time
0 mo
Fixed Payment Total Interest
$0
Balance Over Time
Interest saved with fixed payment$0
Time saved with fixed payment0 months
📖 Why Minimum Payments Take So Long
A credit card minimum payment is designed to keep an account in good standing, not to pay it off in a reasonable amount of time. The math behind why is straightforward once you see it laid out — and it explains why minimum-only balances can take a decade or more to clear.
Credit Cards Compound Daily
Daily Rate = APR / 365
Most credit cards charge interest daily on your outstanding balance, not monthly like many loans. A 25% APR translates to roughly a 0.068% daily rate, applied to your balance every single day. Over a billing cycle this compounds slightly more than a simple monthly rate would suggest, which is part of why credit card debt can grow faster than people expect.
Why the Minimum Payment Keeps Shrinking
Most issuers set the minimum payment as a percentage of your current balance (commonly 1-3%) plus that month's interest, subject to a floor (often around $25). As you pay down the balance, the required minimum payment shrinks along with it — which means less and less of each payment goes to principal over time, dramatically stretching out the payoff timeline.
Why a Fixed Payment Is So Much Faster
Paying a fixed amount every month — rather than a shrinking minimum — means an increasing share of each payment goes to principal as the balance drops and the interest portion shrinks. This compounds in your favor: less interest accrues each month, so even more of the next payment reaches principal. The difference between minimum-only and a modest fixed payment is often not months, but years, and thousands of dollars in interest.
💡 Even increasing a minimum payment by a relatively small fixed amount can cut years off a payoff timeline — the effect is nonlinear because of how compounding works in reverse as the balance shrinks faster.
Should You Pay Off the Card Before Investing?
Paying off high-APR debt is effectively a guaranteed return equal to that APR, since every dollar of principal paid off is a dollar that stops accruing interest. Credit card APRs are commonly well above typical long-run market investment returns, which is why paying down high-interest credit card debt is usually prioritized ahead of investing extra cash, with the common exception of not skipping an employer 401(k) match, since that match is its own guaranteed, immediate return.
❓ Frequently Asked Questions
Why does credit card interest compound daily?
Most credit cards charge interest daily on your outstanding balance using a daily periodic rate (APR / 365), rather than once a month. This means interest compounds more often than a typical loan, which is part of why credit card debt grows faster than many people expect.
Why does minimum-only payment take so long?
Minimum payments are usually set as a small percentage of the balance (often 1-3%) plus interest, so as the balance shrinks, the required minimum shrinks too. This dramatically stretches out payoff time and can mean paying more in interest than the original balance.
How much faster is a fixed payment than minimum-only?
Because a fixed payment does not shrink as the balance drops, it pays down principal faster and keeps interest accruing on a smaller balance sooner, often cutting payoff time from years to months and saving significant interest.
Should I pay off credit card debt before investing?
Generally yes, if the card's APR is higher than your realistic expected investment return, which is common since credit card APRs are often well above typical long-run market returns. Paying off high-interest debt is effectively a guaranteed return equal to the APR.