Credit Cards Against Working Capital Finance: The Real Cost
What a card really costs against a facility, what it costs to pay the tax office or a supplier by card, and how a credit assessor reads heavy card use.
Business Owners Hub
Business Credit Cards · Card Payment Costs · Working Capital Finance
You are the one paying, not the one accepting. This is what a business credit card costs you to pay a supplier or the tax office, what changes on 1 October 2026, and what a credit assessor makes of it all later.
Quick Answer
A business credit card is the fastest money in the drawer and the dearest way to carry a gap for long. Count the card payment fee, the cash advance treatment and the lost interest free period before you decide a card beats working capital finance.
Also called: paying suppliers with a business credit card, using a credit card for cash flow.
What does a business credit card actually cost against working capital finance?
A business credit card costs more than working capital finance on every line except speed, and the gap widens the longer the balance sits. The card wins on availability: the limit is already approved, there is nothing to arrange, and the money moves today. It loses on price the moment the balance survives a statement cycle, because a card is priced to be cleared each month and a facility is priced for a term you agreed before you drew it.
The comparison people usually run is the purchase rate against the facility rate, and that is the smallest part of it. The part that decides it is the shape of the cost: a card charges you at the end of a cycle you may not control, adds a card payment fee wherever the biller passes one on, and can reclassify the same payment as a cash advance without asking you. A working capital facility prices the whole gap once, in advance, with a repayment date attached to it. If you want the definition and the pricing mechanics rather than the comparison, they sit in the working capital loan guide.
This page runs one comparison only, card against facility, from the payer's side. Where a business credit card fits against an overdraft and a line of credit is a separate question with a separate answer, and it is set out in the overdraft and line of credit guide.
| Cost line | Business credit card | Working capital finance |
|---|---|---|
| How the cost is charged | Purchase rate on whatever balance you carry, plus any annual fee, plus a card payment fee wherever the biller passes one on | A rate or a fee agreed for a set term, disclosed before you draw |
| When the cost starts | At the end of the interest free period, or immediately where the payment is treated as a cash advance | From drawdown, on the amount drawn |
| Paying a supplier who does not take cards | Needs a third party service that turns a card payment into a bank transfer, at that service's own fee | Paid as an ordinary transfer from the facility |
| Paying the tax office | Attracts the card payment fee the tax office publishes, which varies by card type | No card payment fee, because the payment leaves as a transfer |
| What repayment looks like | A revolving minimum, so the balance can sit for months without anyone calling it | A scheduled repayment with an end date |
| What it does to the next application | The full limit usually counts against servicing, drawn or not, and heavy revolving use reads as a cash flow signal | A disclosed facility with a known term, repayment and purpose |
| Where it genuinely fits | Short gaps, small amounts, spending already inside the limit and cleared inside the cycle | A defined gap with a defined exit, where the amount is larger than the limit or the gap is longer than a month |
What changes for a business paying by card from 1 October 2026?
From 1 October 2026 the surcharge you have been paying to pay by card is being removed on the designated networks, so the visible cost of paying by card falls, while the cost of carrying the balance on the card does not change at all. The Reserve Bank of Australia published the decision in its Conclusions Paper media release of 31 March 2026, which sets out removing surcharging on debit, prepaid and credit cards on the designated eftpos, Mastercard and Visa card networks, lowering the caps on interchange fees paid by Australian businesses, and increasing transparency over the fees charged by card networks and payment service providers.
The line that matters most to a business paying its own bills is the one about business to business payments. In the Reserve Bank's own answers to the Conclusions Paper, read 21 September 2026: card payments between businesses would not be exempt from the removal of surcharging unless a card network's rules provide an exemption or an exemption is provided by law or regulation. In other words, the change is not a consumer only change, and a supplier who has been adding a surcharge to your card payment is inside it.
One caution, because it decides how much you actually save. What is being removed is the surcharge, not every fee on a card payment. The Reserve Bank's answers to the Conclusions Paper say fees for renting payment terminals, processing transactions or other payments related offerings are fees for services provided and are not considered payment surcharges. So a line on an invoice that is priced as a service fee rather than a card surcharge does not necessarily disappear on 1 October 2026, and reading the invoice is still the only way to know which one you are looking at.
What does it cost to pay the tax office by card?
Paying the tax office by card costs a card payment fee that is set by the type of card rather than by one flat percentage, and it sits on top of whatever the card charges you to carry the balance afterwards. The tax office's own position, read on 21 September 2026 on a page last updated 11 August 2026, is that the fee is a percentage of the amount being paid, based on the type of card, that it is equal to the fee the tax office incurs from its bank, that it will be reviewed from time to time and may change, and that it is charged by your card supplier rather than by the tax office. Card payment fees do not apply where you use a debit card.
This page does not reproduce the percentages, for a reason worth stating. There is no single tax office card fee: the published figures differ by card type and by whether the card is domestic or international, they are reviewed and change, and a percentage copied into an article ages badly. Read the current table on the tax office's how to pay page on the day you pay, then add it to the cost of carrying the balance, because paying a BAS on a card you cannot clear that month is two costs, not one.
Whether the card payment fee is deductible, and how it sits with the rest of your tax position, is a question for your accountant or registered tax agent rather than for a broker.
What do the services that turn a card into a bank transfer charge?
The services that let you put a bill on a card when the biller does not take cards charge a fee of their own, expressed as a percentage of the amount paid and varying with the card type, and it is charged to you rather than to the supplier. That is the mechanism. This page publishes no figure for it, because the fee differs by provider and by card and is set out on each provider's own page at the time you use it; a band written down here would be out of date before it was useful.
There is a genuinely open question sitting underneath these services, and it is better stated as a question than guessed at. Is that fee a surcharge, caught by the removal from 1 October 2026, or a fee for a separate service that sits outside it? Nothing read on 21 September 2026 settles it. The Reserve Bank's published answers draw the distinction between a surcharge and a fee for services provided, and do not address this arrangement either way. If you are relying on one of these services regularly, the honest read is that the fee may survive the reform, and a facility priced for the gap is the comparison to run. The arithmetic for that comparison is in the working capital cost guide.
How do interest free days work when a card funds a supplier payment?
Interest free days only work where the closing statement balance is cleared in full by the due date, so a card that funds a supplier payment you cannot clear that month is not interest free at all. The period runs from the start of the statement cycle, which means a purchase made the day after a statement closes typically gets the full run of days and one made the day before it closes gets almost none. Carry any balance and the interest free treatment usually stops until the account is cleared again, which is where a card used for cash flow quietly becomes the most expensive money in the business.
Two things commonly break the interest free assumption. The first is the cash advance: it typically attracts interest from the day it is taken, with no interest free period and often a separate fee, and whether a payment is treated as a purchase or as a cash advance is decided by the issuer and the way the payment is processed rather than by what you intended. The second is timing: the payment that matters to the supplier is the day the money lands, and the cost that matters to you is the day the statement closes, and those two dates are rarely the same. If the question underneath this is which tool should carry a recurring gap, the tool by tool comparison of a line of credit, an overdraft and a card is set out in this comparison of the three.
What does a credit assessor make of heavy card use on your statements?
Heavy card use does not disqualify an application, but from the underwriter's seat it changes what the statements are being read for. Bank statements are read as a record of how the business funds itself, not as a record of what it buys, and card activity is one of the clearest signals in that record. A card cleared every month reads as ordinary trading. A limit that revolves at its ceiling, repeated cash advances, and card payments covering wages or the quarterly tax bill read as a funding pattern instead, and the assessor starts asking what is producing the gap.
The usual outcome is not a decline. It is a request for more information, a tighter structure, or a facility sized to the cycle that is actually causing the pressure, which is a better outcome than the card because it has an end date. Two points worth knowing before you next ask for money: the full card limit usually counts against servicing whether it is drawn or not, so an unused card is not free; and business purpose credit sits outside the National Credit Code, so the consumer disclosure, responsible lending and hardship rules do not apply to it. If the business is trading under two years with nothing to secure against, the options are a different set again, and they are covered in the under two years piece.
One thing needs saying plainly, because a card is the easiest place to hide it. Borrowing does not fix an insolvent business. If the gap is not timing but trading, a facility only buys time you may not be able to repay, and the free and independent Small Business Debt Helpline is worth the call before you draw anything. Where the gap genuinely is timing, a working capital loan priced for the cycle is the cheaper end of the same decision.
| What shows on the statement | How it usually reads | What changes the read |
|---|---|---|
| Card purchases for trade supplies, cleared each month | Ordinary trading | Nothing to explain |
| A balance revolving at or near the limit every month | A funding pattern rather than a spending one | A stated reason and a visible plan to clear it |
| Repeated cash advances | Cash flow pressure, because the card is being used as cash | Frequency falling away across recent statements |
| Card payments covering wages | The payroll is being funded by the card | A facility carrying the payroll cycle instead |
| Card payments to the tax office each quarter | A timing gap around the reporting cycle | A payment arrangement, or a facility sized to the cycle |
| Minimum repayments only | Very little headroom | Repayments above the minimum across a run of statements |
| A new limit drawn in full straight away | Appetite for credit running ahead of the cash coming in | A draw matched to a specific invoice or order |
The card is not the enemy and it is not the answer. It is the fastest instrument in the business and the one priced for a month, so it does its best work on small, short, clearable gaps and its worst work on anything that survives a statement cycle. From 1 October 2026 the surcharge on the designated networks goes, which makes the card cheaper to use and no cheaper to carry. The tax office fee, the third party service fee and the cash advance treatment all sit outside that change, and heavy revolving use still reads as a cash flow signal to the next assessor who opens your statements.
Key takeaway: use the card for what clears inside the cycle, and price a facility for anything that does not.Frequently Asked Questions
You can pay a BAS with a credit card, and the tax office charges a card payment fee for doing it. That fee is a percentage of the amount being paid, based on the type of card, and the current percentages sit on the tax office's own how to pay page, read 21 September 2026 and last updated 11 August 2026. See how a merchant cash advance works.
Card surcharging is being removed from 1 October 2026 on the designated eftpos, Mastercard and Visa networks, and payments between businesses are not carved out of that. The Reserve Bank's own answers put it plainly: card payments between businesses would not be exempt from the removal of surcharging unless a card network's rules provide an exemption or an exemption is provided by law or regulation, as published in the Conclusions Paper media release of 31 March 2026 and its accompanying answers. See how a merchant cash advance works.
A business credit card is cheaper than a working capital facility only where the balance is cleared inside the interest free period, and more expensive once it is carried. The comparison that matters is the total cost of the gap, not the headline rate, which is the arithmetic set out in the cost guide. Add the card payment fee where a biller passes one on, and the cash advance treatment where the payment is not a purchase, before calling the card the cheaper option.
Using a credit card for cash flow does not disqualify an application, but it changes what an assessor reads the statements for. A card cleared each month reads as ordinary trading; a limit revolving at its ceiling, repeated cash advances and card payments covering wages read as a cash flow pattern instead. The undrawn limit also counts against servicing in most assessments, so a card sitting unused is not free of consequence when you next ask for money.
A cash advance on a business credit card typically costs more than a purchase, because it usually attracts interest from the day it is taken with no interest free period, and often a separate cash advance fee as well. Where the card is funding a recurring gap rather than a one off, the tool by tool comparison of a line of credit, an overdraft and a card is the better starting point.
FBAA Accredited
