How Do Credit Card Minimum Payments Work?
Updated 30 March 2026
Credit card minimum payments look simple on your statement but involve calculation methods designed to maximize the interest you pay over time. Understanding these mechanics is the first step toward taking control of your debt. The three most common minimum payment formulas used by major card issuers determine exactly how much you owe each month and, critically, how that payment splits between principal reduction and interest charges.
The Three Minimum Payment Formulas
Formula 1: Percentage of Balance (Most Common)
The minimum is calculated as a percentage of your outstanding balance, typically 1% to 3%, with 2% being the industry standard. A $5,000 balance with a 2% minimum means $100 per month. As the balance drops to $3,000, the minimum falls to $60. Most issuers set a floor (usually $25 to $35) so the payment never drops below a certain threshold.
Issuers using this method: Discover (2% or $35 minimum), Bank of America (1% of balance + interest + fees or $25), many store credit cards (varies, often 2-3%).
Formula 2: Interest + 1% of Principal
Some issuers calculate the minimum as all monthly interest charges plus 1% of the principal balance. On a $5,000 balance at 22% APR: monthly interest is $91.67, plus 1% of principal ($50) = $141.67 minimum. This method results in higher minimums than the percentage method, which means faster payoff but higher required monthly payments.
Issuers using this method: Chase, Citi (for many card products). This is actually the most consumer-friendly formula because it guarantees at least 1% goes to principal reduction every month.
Formula 3: Flat Dollar Amount
Some cards, particularly store credit cards and cards for borrowers with lower credit scores, use a flat minimum (such as $25, $35, or $50) regardless of the balance. On a small $500 balance, a $35 minimum is generous (7% of the balance). On a $10,000 balance, a $35 minimum is only 0.35% of the balance, barely covering interest. This method leads to the longest payoff periods for large balances.
Issuers using this method: Some subprime card issuers, store-branded cards. This formula is becoming less common as regulators have pushed for minimums that exceed monthly interest charges.
Month-by-Month Breakdown: $5,000 at 22% APR, 2% Minimum
This table shows key months in the payment schedule for a $5,000 balance at 22% APR with a 2% minimum payment (floor of $25). Notice how the minimum payment drops over time, the interest portion remains high relative to the total payment, and the principal reduction is minimal in the early years. By month 48 (4 years in), you have paid approximately $3,600 in payments but your balance has only dropped by $539 because $3,061 of those payments went to interest.
| Month | Balance | Min Payment | Interest | Principal | New Balance |
|---|---|---|---|---|---|
| 1 | $5,000 | $100.00 | $91.67 | $8.33 | $4,991.67 |
| 6 | $4,958 | $99.16 | $90.90 | $8.26 | $4,949.74 |
| 12 | $4,903 | $98.06 | $89.89 | $8.17 | $4,894.83 |
| 24 | $4,781 | $95.62 | $87.65 | $7.97 | $4,773.03 |
| 48 | $4,461 | $89.22 | $81.78 | $7.44 | $4,453.56 |
| 72 | $3,956 | $79.12 | $72.53 | $6.59 | $3,949.41 |
| 96 | $3,145 | $62.90 | $57.66 | $5.24 | $3,139.76 |
| 115 | $25.00 | $25.00 | $0.46 | $24.54 | $0.46 |
Simplified for illustration. Actual month-by-month may vary slightly due to daily compounding and payment timing.
Why the Declining Payment Structure Is So Costly
The most damaging aspect of percentage-based minimum payments is that they decline as your balance drops. In month 1, your $100 payment sends $8.33 to principal. By month 48, your $89.22 payment sends $7.44 to principal. In absolute terms, you are paying $10.78 less per month but reducing your principal by $0.89 less. The payment dropped 10.8% but the principal reduction dropped 10.7%. Interest takes virtually the same share of every payment throughout the life of the debt.
If you instead locked your payment at $100 per month (the original minimum) and never let it decrease, you would pay off the same $5,000 balance in approximately 7 years and 11 months, saving $1,850 in interest compared to the declining minimum. You do not need to find extra money. You simply need to not reduce your payment as the balance drops. This single behavior change saves thousands of dollars.
The floor payment adds another wrinkle. Once your minimum calculation (2% of balance) drops below the floor ($25), the floor takes over. On a $1,000 balance, 2% is only $20, so the $25 floor kicks in. At this point, the floor is actually relatively aggressive (2.5% of the balance), and payoff accelerates. This is why the final years of minimum payment schedules move faster than the middle years. But reaching that point takes years of paying mostly interest.
How to Find Your Card's Minimum Payment Formula
Your card's minimum payment formula is disclosed in the cardholder agreement (also called the cardmember agreement or terms and conditions). You can find this document in three places: (1) the original paperwork when you opened the account, (2) your card issuer's website under "account terms" or "cardholder agreement," and (3) by calling the number on the back of your card and requesting a copy.
Look for a section titled "How We Calculate Your Minimum Payment" or "Minimum Payment Calculation." It will specify the percentage (typically 1-3%), the floor amount ($25-$35), and whether interest and fees are included in or added to the calculation. Many agreements state something like: "Your minimum payment will be the greater of: (a) $25 or (b) 1% of your balance plus new interest charges and late fees."
Your monthly statement also shows the minimum payment due and, since the CARD Act of 2009, must include a disclosure box showing: (1) how long payoff takes at minimum payments, (2) how much you would pay in total at minimum payments, and (3) the monthly payment needed to pay off the balance in 36 months and how much that saves. This disclosure box is your built-in wake-up call. If you have never looked at it, check your next statement.