Business Credit Cards: Using Them Without Getting Stuck
A $6,000 balance at 26% APR, paid at $200 a month, takes more than four years to clear and costs about $3,600 in interest. You would have paid for it one and a half times.
A business card is a useful tool and a fast trap, and the difference between the two is entirely in whether the balance clears each month.
This post is the arithmetic, so you can see which one yours is.
What carrying a balance actually costs
Total interest paid before the balance clears, at a fixed monthly payment.
Balance | Payment | At 18% | At 22% | At 26% | At 30% |
$3,000 | $150 | $560 | $720 | $920 | $1,190 |
$6,000 | $200 | $2,120 | $2,760 | $3,600 | $4,780 |
$6,000 | $400 | $880 | $1,090 | $1,330 | $1,610 |
$12,000 | $400 | $4,250 | $5,530 | $7,230 | $9,600 |
Read the two middle rows together. The same $6,000 balance costs $3,600 at $200 a month and $1,330 at $400 a month. Doubling the payment does not halve the interest, it cuts it by nearly two thirds, because you are paying for fewer months as well as less balance.
That is the single most useful thing on this page.
How this is worked out
Interest is charged monthly at the APR divided by twelve, on the balance that is left. Your payment covers that month's interest first, and whatever is left comes off the balance.
So a payment only slightly above the monthly interest removes almost nothing, which is how a balance sits nearly still for a year while you pay every month.
No promotional rates, no fees and no new spending are included above. Add any of those and the real figure is higher.
Smallest balance first, or most expensive first?
Most expensive first costs you less. Smallest first finishes a card sooner, and finishing something is worth more than people like to admit.
The gap between the two is usually smaller than the gap between doing either one and doing neither. Pick the one you will keep up.
Using a business card without getting stuck
One card, used for one thing. A card that is only ever business is a card whose statement is already half your bookkeeping.
Clear it monthly or know why not. Carrying a balance is a decision. Make it deliberately, with the table above open.
Never use it for tax. Tax money that goes on a card is a bill you already had, now with interest.
Watch the annual fee against what you actually earn back. A $95 fee needs real spending behind it to pay for itself.
Put the payment date in the same slot as your weekly twenty minutes. Late fees and rate jumps are the expensive part, not the interest.
Run your own numbers free
The table above uses round balances. Yours is not round, and the difference between $3,600 and $1,330 in interest depends entirely on numbers only you have.
The free Projections screen answers how long until I am debt free and what if I pay extra at my cards with your own balances and rates. It is part of La Soglia, the free membership of the Money Mastery System, along with the net worth tracker, Clarity AI and the Money Mastery Collective. Free, with no bank connection and no card.
Run your own version of the two middle rows. It takes about five minutes and it is usually the five minutes that changes the payment.
Questions we hear
Is a business card better than a personal one for business spending? For bookkeeping, yes, by a distance. One statement that is entirely business turns sorting into checking.
Does a business card affect my personal credit? Most report to personal credit if you guarantee them personally, which most sole proprietors do. Assume it does unless the issuer says otherwise.
Should I take a 0% balance transfer? It can save real money if you clear it within the promotional window, and it costs real money if you do not. Work out the payment that clears it in the window before you take it, not after.
What APR should I expect? Business card rates move with the market and with your credit. The table spans 18% to 30% because that is the range most owners are quoted.
Bring it to the Collective
Card balances are the thing people are quietest about and least alone in. The Money Mastery Collective has a discussion feed open to free members, and questions there get answered without anyone being made to feel foolish.
A note on what this is
This article is educational. The Money Mastery System is an educational tool, not financial software, and nothing here is legal, tax, investment or financial advice. The interest figures are worked examples at the rates stated, not an offer, a quote or a prediction of what you would be charged. For guidance on your own circumstances, please speak with a qualified professional who knows them.
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