Paying the minimum on time feels like staying on track. The account stays current, no late fee, no phone call. It is the most respectable way to stay in debt for years.

Take one card: $4,100 at 18.9% APR, minimum $130 a month. Nothing exotic. This is an ordinary card with an ordinary balance.

Month one: half your payment is gone before it touches the debt

Interest for the month is $4,100 × 18.9% ÷ 12 = $64.58. Your $130 payment covers that, and $65.42 goes to the balance.

Half the payment buys nothing. It pays for the privilege of still owing $4,034.58.

Minimum only: 44 months, $5,712 total

Keep paying $130 a month and nothing else, and the card takes about 44 months to clear. You will have paid about $5,712 for a $4,100 balance — about $1,612 of interest, roughly 39% on top of what you borrowed.

That is the minimum doing exactly what it was designed to do: keep you current, not get you out. Minimums are sized by the lender, and the lender's interest is not your payoff date.

Add $100 a month: 22 months, $4,851 total

Same card, $230 a month instead of $130. It clears in about 22 months. Total paid: about $4,851. Interest: about $751.

The extra $100 a month saves about $861 of interest and about 22 months. The first $130 mostly services the debt; the extra $100 is what actually shrinks it.

You do not need to find $100 by magic. In the three-tier rule from my earlier post, the extra comes from a good month after the buffer is covered — and it all goes to one target debt, not spread thin across every card.

The worse version of the trap

Some minimums do not even cover the month's interest. If your minimum is smaller than the interest charged that month, the balance grows while you pay on time. That is not a payoff plan. That is a treadmill with a receipt.

If that is your card, it goes first: renegotiate the minimum, or pay more than the minimum on that card before anything else. No payoff method fixes a minimum that loses to interest every month.

Run your own numbers before you decide

The arithmetic above assumes a fixed APR and no new borrowing — the same assumptions as the calculator I built. If your card's minimum shrinks as the balance falls, the real timeline is longer than 44 months, not shorter.

I built a free single-page calculator that runs this exact logic — baseline check, this month's split, target debt, and a conservative debt-free estimate that assumes every future month equals your lowest month. No sign-up, nothing leaves your browser:

https://alapha888.github.io/irregular-income-debt-baseline/

It is a planning tool, not financial advice. It assumes fixed APRs and no new borrowing, and it does not know your loan terms, fees, or tax situation.

I am building a full spreadsheet version (Snowball / Avalanche + buffer waterfall, month-by-month plan, Google Sheets + Excel). The calculator page has a link to request it when it is ready — if enough people ask, I will finish it; if not, the free calculator stays up as is.