$29,000 in Card Debt at 30% on $600 a Month

Paying the minimums while the balance grows

There is a band that catches people who are, by every visible measure, doing the right thing. Both cards here are paid on time and in full to the required amount every month. Nothing is delinquent. No fee is charged, no penalty rate is triggered, and every statement arrives looking like a plan in progress. And the total owed goes up anyway.

The mechanism is unglamorous. Interest is charged on each card at its own annual rate divided by twelve, applied to the balance carried into that month, before any payment is applied. At rates near thirty percent, on balances this size, the monthly charge alone is larger than the $600 that goes out. What you send is consumed entirely by the interest that was already added, and the shortfall is added to what you owe. Next month the same calculation runs against a slightly larger balance and produces a slightly larger charge. The curve bends the wrong way, gently at first, and it does not flatten out on its own.

This is a different failure from a budget that cannot cover the minimums, and the difference is worth holding onto because the two look nothing alike from the outside and call for different responses. A budget below the minimums announces itself immediately: something goes unpaid, a fee appears, a statement changes tone. This case is silent. Everything is current, so nothing triggers an alert, and the only visible symptom is a balance that ends each year higher than it started despite twelve payments having been made.

That is why the calculator refuses to print a schedule here rather than showing a very long one. A hundred-year repayment table is not a conservative answer to this situation; it is a misleading one, because it implies a finish line exists at the end of a great deal of patience. There is no finish line at this budget. What there is, is a boundary — and the useful question is not how far away the end is, but how far this budget sits from the point where the balance starts falling at all.

Raise the budget or cut the rate — which crosses the line

Three quantities set the boundary: the balances, the rates and the budget. The balances are the hardest to move quickly, so the practical question is which of the other two you can shift, and by how much, before the balance starts falling.

Both levers act on the same product, so they are directly comparable. Raising the budget adds cash on one side of the comparison. Cutting a rate reduces the charge on the other. Because the $20,000 card carries both the larger balance and the higher rate, a given reduction in its rate does more than the same reduction applied to the $9,000 card — the rate is multiplied by the balance it sits on, so rate cuts are worth most where the money is. This is also why a consolidation offer should be judged on the rate it applies to the large balance rather than on its headline.

Use the calculator to find the boundary rather than guessing at it. Raise the budget in fifty-dollar steps, leaving everything else alone, until the result stops saying the debt never clears — that is what the gap actually costs, stated as a monthly amount. Then put the budget back and lower the 29.99% instead, in whole points, until the same thing happens. Comparing the two answers tells you whether your effort is better spent on income or on refinancing, and it converts an abstract worry into two concrete targets you can act on.

Be aware that crossing the boundary is not the same as having a comfortable plan. Just past it the debt clears, but slowly and expensively, and a small setback pushes you back across. Aim well beyond the line rather than at it.

What a minimum payment actually is, and why it shrinks

A credit card minimum is not a fixed instalment. It is typically the larger of a small percentage of the current statement balance — commonly one to three percent, plus that month's interest and any fees — or a flat floor of around twenty-five or thirty-five dollars, whichever is greater. Because the percentage side is computed from the balance, the required minimum falls every month that the balance falls.

That is the trap, and it is designed rather than accidental. Paying the minimum feels like keeping up, but a shrinking payment against a balance that is still accruing interest at twenty-plus percent stretches the payoff over an extraordinary span. The typical illustration on a statement, which issuers in the United States are legally required to print, routinely shows a mid-four-figure balance taking somewhere between fifteen and thirty years to clear at the minimum, with total interest exceeding the original balance. The debt is not being retired; it is being maintained.

This calculator holds the minimum you enter flat for the life of the card rather than recalculating it downward each month. That is deliberate and it is the assumption that fits the tool's purpose. You are committing to a total monthly budget, not to whatever each issuer happens to demand, so a shrinking minimum would only reshuffle money between cards inside a total that never changes — and it would slightly understate the payoff date for anyone who does the sensible thing and keeps paying the same amount as the balance falls. Enter today's minimum from your statement and treat the figure as a floor, not a plan.

Balance transfers, promotional rates and the fee people forget

A zero percent balance transfer can beat any payoff order, because it attacks the rate rather than the sequence. Move a balance to a card charging nothing for eighteen months and every payment is principal for eighteen months. Nothing in avalanche or snowball comes close to that.

The catch is in the details, and there are three. First, the transfer fee, usually three to five percent of the amount moved, is charged up front and added to the transferred balance — five thousand moved at four percent is five thousand two hundred owed. Second, the promotional rate expires on a fixed date, and whatever balance remains on that date reverts to the card's ordinary rate, which is often higher than the one you left. Third, purchases made on the new card may not share the promotional rate at all, and payments are typically applied to the lowest-rate portion of the balance first, so a card used for spending during the promotion can accrue interest you did not expect.

The test is simple. Divide the transferred amount by the number of promotional months and ask whether you can genuinely pay that every month. If yes, the transfer is close to free money and this calculator understates what you can do. If no, model it as the rate you will actually be paying after the promotion ends, with the fee added to the balance, and compare that against staying put. This tool models no promotional periods and no fees at all — every rate you enter runs unchanged for the whole payoff — so a transfer is something to evaluate beside these numbers, not inside them.

Reading your result, and the cases where there is no answer

Three outcomes are possible and only one of them is a schedule. If your budget covers the minimums and the debt clears, you get a debt-free month count for each order, the interest each one costs, and the difference. If your budget is below the sum of the minimums, there is no plan at any order, and the page says so instead of producing a schedule that never terminates — the fix is more budget, a hardship arrangement with the issuer, or a consolidation, not a different ordering. If the minimums are covered but the interest still outruns the payments, the balance never reaches zero, and that is reported as such too.

The simulation is capped at a hundred years of months, and the cap can never be the reason you see a number: reaching it is reported as never clearing, and the partial totals are discarded rather than shown. A payoff plan that quietly truncates at some arbitrary horizon and prints a total is worse than no answer, because it looks like one.

Two habits make any of these numbers real. Stop adding new charges to the cards you are paying down, because new spending accrues at the same rate and silently resets the plan the calculator just built. And raise the budget rather than the effort: an extra fifty a month changes the result far more than any resequencing does, which is the quiet lesson of comparing avalanche against snowball and finding the gap smaller than you hoped.