What it means
A credit card combines two products in one piece of plastic. The first is a payment mechanism with fraud protection and a short interest-free period; the second is an expensive unsecured loan that switches on the moment you fail to clear the balance.
The interest-free element only works in full. Most issuers charge interest from the transaction date on the whole balance once you stop paying in full, so a single partial payment can remove the grace period on everything, including new purchases.
For a business, company credit cards solve real problems. They handle supplier deposits, travel, software subscriptions and small purchases without the delay of raising a supplier account, and they generate a single itemised statement that makes coding to the general ledger straightforward.
They also introduce control risks. Card spending bypasses purchase orders, receipts vanish, personal and business spending blur, and cards issued to departed employees are easy to forget.
Sensible controls include per-card limits, category blocks, a monthly receipt reconciliation deadline and immediate cancellation on leaving. The other business angle is cash flow timing.
A statement date and payment date that fall just after your main customer receipts arrive can give you several weeks of free working capital each month, provided the balance is always cleared. That benefit disappears entirely the first month you carry a balance.
In practice
Real-world examples.
Example
A marketing consultancy puts all software subscriptions on one company card with a $15,000 limit. The finance manager reviews the statement monthly and cancels three unused tools, saving $4,800 a year that was invisible when payments came from several personal cards.
Example
An events business pays venue deposits by credit card specifically for the purchase protection. When a supplier fails before delivering, the card issuer refunds a $9,000 deposit that would otherwise have been an unsecured claim in the insolvency.
Example
A small builder uses a card to buy materials at the start of a job and clears the balance when the client's stage payment arrives three weeks later. The float costs nothing, but a delayed client payment one month leaves a balance carried at 24%, wiping out the job's margin on that phase.
Formula
Calculation
Monthly interest = Outstanding balance x (Annual percentage rate / 12). Minimum payment is usually a set percentage of the balance, subject to a floor amount.
Take a card balance of $8,000 with an annual percentage rate of 24% and a minimum payment of 3% of the balance. The monthly interest rate is 24% / 12 = 2%, so the interest added is $8,000 x 0.02 = $160.
The minimum payment is $8,000 x 0.03 = $240. Of that, $160 covers the interest just charged, leaving only $240 - $160 = $80 to reduce what you actually owe. Paying the minimum therefore cuts the balance by 1% of itself in a month, which is why minimum payments extend repayment over many years. Paying $500 instead would put $500 - $160 = $340 against the principal, more than four times as much progress for roughly twice the cash.Case study
Seen in the real world.
The following is an illustrative, fictional example. Redgate Studios, an invented design agency with nine staff, issued company credit cards to five people with a combined limit of $40,000 and no written policy beyond a request to keep receipts.
Within a year the agency was carrying an average balance of about $12,000 because nobody owned the monthly clearance, generating roughly $2,880 of interest at 24% annually. A review also found $340 a month of duplicate software subscriptions on two different cards, and one active card belonging to a designer who had left four months earlier.
Redgate's illustrative response was simple rather than clever. It set individual limits ranging from $1,500 to $10,000, required receipts uploaded within five working days, made the office manager responsible for a full direct debit clearance every month, and added card cancellation to the leaver checklist. Interest cost fell to nil the following year.
Watch out
Common mistakes.
- Believing the interest-free period still applies if you pay most of the balance. In most cases any carried balance removes the grace period, and interest is charged on purchases from the day they were made.
- Treating the minimum payment as a reasonable repayment plan. It is designed to keep the account current, not to clear the debt, and it barely touches the principal.
- Issuing company cards without written limits or a receipt deadline. Card spending sits outside normal purchase controls, so the discipline has to be built deliberately.
Questions
People also ask.
What is the difference between a credit card and a charge card?
A charge card must be repaid in full every month and has no revolving borrowing option, while a credit card lets you carry a balance and pay interest.
Do cash withdrawals on a credit card cost more?
Yes, considerably. They usually carry an immediate fee, a higher interest rate, and no interest-free period at all, so they are worth avoiding.
Should a business use a credit card as working capital?
Only for very short, planned gaps that will definitely be cleared. For sustained funding needs an overdraft or invoice finance is normally far cheaper.
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