Credit
Why The Minimum Payment Takes 18 Years To Clear $6,000
The formula is designed so the balance falls slowly, and it is legal, disclosed and printed on your statement every month. Switching to a fixed payment instead takes about a minute.

I carried a balance on one credit card for eleven months in 2019. Paid the minimum every time, on time, never missed one. My credit report thought I was a model citizen, and honestly so did I, right up until a Sunday night when I typed my own numbers into a payoff calculator to see how I was doing.
Eighteen years.
Not eighteen months. Eighteen years and three months to clear $6,000, and $10,442 of interest to get there, on a pile of stuff I had mostly already thrown away.
What the minimum actually is
The minimum payment is the smallest amount your card issuer will accept without marking the account delinquent. That is the whole definition. It is not a recommendation, it is not a repayment plan, and nothing about it is built to get you out of debt.
Most US issuers construct it the same way: a small slice of your balance, often 1 per cent, plus the interest and fees that posted that month, with a dollar floor of around $35 underneath. Your cardholder agreement states the exact formula. Mine did, on page four, which is where I eventually found it.
Run it. A $6,000 balance at a 24 per cent APR, the annual percentage rate, which is the yearly price of borrowing money, generates $6,000 times 0.24 divided by 12 in interest for the month.
That is $120. Add 1 per cent of the balance, $60, and the minimum due is $180.
Of that $180, sixty dollars touches the debt. The other $120 is rent on money you already spent.
$120 of $180
First month's minimum that is pure interest
$6,000 balance at a 24% example APR
None of this is hidden. A revolving balance is the product, interest from people who carry one is a large share of how the card business earns, and a payment formula that falls alongside the balance keeps the average balance high for years.
It is a well designed product. It is just not designed for me.
A full year of paying on time
Because the minimum is a percentage of the balance, it falls as the balance falls. Month one you pay $180.
Month two the balance is $5,940 and the minimum is $178.20. The payment chases the debt downhill and never quite reaches it.
Twelve payments in you have handed over $2,045. The balance has moved from $6,000 to $5,318. You cleared $682 of debt and paid $1,363 for the privilege, having done everything the statement asked of you.
I want to be fair to those eleven months, because they did do something. On time payment history is the single largest input into a credit score, and mine held steady the whole way.
Paying the minimum protects your score. It does almost nothing to your balance, and I had quietly folded those two ideas into one.
Where it ends
Keep going at the minimum and the balance finally hits zero in month 219. Total paid: $16,442 against a $6,000 debt.
What is left of a $6,000 balance, year by year
24% example APR. Minimum is 1% of balance plus interest with a $35 floor.
That chart is the whole argument. Minimums leave you owing $1,796 after ten full years of payments. The same balance with an extra $100 a month is finished in forty-six months for $8,637 all in.
$7,805
Saved by adding $100 a month
Same balance, same rate, same card
The floor makes the tail worse
There is a second trap waiting at the end. Once 3 per cent of your balance falls below the $35 floor, which happens around $1,167, the payment stops shrinking and sits at $35. At that point $23.32 of it is interest and $11.68 is principal, and you spend years at the bottom of the hill paying thirty-five dollars to move twelve.
What one new purchase does
All of this assumes you stop spending on the card, which is the assumption every payoff calculator quietly makes and never mentions. Put $400 of new dinners on the same card and the balance climbs, the minimum recalculates upward alongside it, and the payoff date walks away from you again.
There is one genuinely good rule working in your favour, and it arrived with the same 2009 law. Anything you pay above the minimum has to be applied to the balance carrying the highest APR first. Anything at or below the minimum, the issuer can allocate as it likes, which on a card holding both a promotional balance and a purchase balance usually means the cheap one.
So a year into the fixed $180 schedule, with the balance down at $5,195, the minimum due has fallen to $155.86 and twenty-four of your dollars are now above it, aimed at the most expensive money on the card. Two years in, the gap is $54.76. It widens every month you refuse to let the number shrink.
Change one setting
Open the autopay screen on your card. Nearly every issuer offers three choices: minimum due, statement balance, or a fixed amount you type in yourself. Most people sit on minimum due because it is the default and nobody goes back to look.
Switch it to a fixed amount. Type in whatever this month's minimum is, and leave it there.
With no extra money at all, that takes the $6,000 example from 219 months to 56, and from $16,442 to $9,987. You are paying exactly what you were already paying in month one. You have only stopped letting the number shrink.
56 months
Payoff when the payment stops shrinking
Versus 219 months on declining minimums, identical first payment
If a fixed $180 is more than you can hold every month, type in one dollar over today's minimum instead. One dollar buys nine months and $356, which is a mediocre return on a dollar and an excellent return on thirty seconds.
The dollar is not the point. The point is that the payment is now yours to set.
Then look at your next statement for the minimum payment warning box. Issuers have had to print it since the Credit CARD Act of 2009, and it shows two things: how long you will be paying at the minimum, and the payment that would clear the balance in three years.
Both numbers were on every statement I ever received. I had never once read mine.

