Key Takeaways
- A business overdraft is a revolving credit limit attached to your trading account: you dip into it when cash runs short, repay as money comes in, and pay interest only on what you actually use. It is built for timing gaps, not for buying long-term assets.
- Overdrafts are almost always variable-rate — so every one of 2026’s four cash rate rises, including the 29 September move to 4.60%, has flowed into what a drawn overdraft costs. A facility priced a year or two ago is worth re-examining now.
- The interest rate is only part of the price. Line fees or facility fees are usually charged on the whole limit whether you draw it or not, and unsecured facilities cost more than those secured by property or other assets.
- The most expensive mistake we see is using an overdraft for the wrong job — funding a vehicle, fit-out or tax debt on a facility designed for week-to-week timing gaps, so the balance never returns to zero.
- The December quarter stacks the cash-flow pressure: Christmas stock to fund, the first quarter’s BAS generally due 28 October if you lodge it yourself, and payday super now running through every pay cycle.
- This is general information only, not personal credit, tax or financial advice. Rates, fees and eligibility vary by lender and change often — confirm current pricing with your lender, broker or accountant before acting.
A business overdraft is the piece of working capital most Australian business owners reach for first — and, after four cash rate rises in 2026, it is also the facility repricing fastest. This week the Reserve Bank lifted the cash rate to 4.60%, its highest level in roughly 15 years, and while the headlines went to mortgages, every variable-rate overdraft in the country moves off the same benchmark. We covered the decision itself in our RBA rate rise guide; this article goes deeper on the facility that rise hits hardest.
Whether you run a café in Geelong, a trades business in Melbourne’s west or a distribution company with customers Australia-wide, the questions are the same: how does a business overdraft actually work, what does it really cost, and when is a term loan, invoice finance or trade finance the smarter tool? Here is the plain-English version we walk our own clients through.
What Is a Business Overdraft and How Does It Work?
A business overdraft is an approved limit attached to your business transaction account that lets the account go below zero, up to that limit. There is no fixed repayment schedule: the balance rises when you pay wages, suppliers or the ATO before your customers pay you, and falls again as receipts land. You are charged interest only on the overdrawn balance, calculated daily — so a facility that sits unused most of the month costs far less in interest than a term loan of the same size.
That flexibility is the whole point, and also the trap. An overdraft is designed to breathe — drawn one week, back near zero the next. Lenders reviewing your facility want to see exactly that pattern. An overdraft that sits fully drawn month after month is no longer smoothing timing gaps; it is quietly funding something permanent, at revolving-credit pricing, with a limit the lender can typically review or reduce. That is when it belongs somewhere else in your structure — a business term loan, an equipment finance agreement, or a dedicated facility for a tax debt.
Overdrafts come secured and unsecured. A secured overdraft — backed by residential or commercial property, or sometimes other business assets — generally offers larger limits and sharper pricing. Unsecured overdrafts, including the newer generation offered by non-bank lenders with fast online approval, trade convenience and no property security for higher rates and smaller limits. Both banks and non-bank lenders now compete hard in this space, which is precisely why the facility your business opened years ago may no longer be the one it would be offered today.
What a Business Overdraft Really Costs at a 4.60% Cash Rate
We deliberately aren’t quoting rates in this article — overdraft pricing varies widely between lenders, between secured and unsecured facilities, and week to week in a moving market. What matters is understanding the components, because the advertised interest rate is only one of them:
Interest on the drawn balance. Almost always variable, at a margin above benchmark rates that is typically higher than home loan margins. Four rises in 2026 mean the same drawn balance costs meaningfully more today than it did in January — without you signing anything.
Line or facility fees. Most lenders charge a fee on the whole approved limit, drawn or not — commonly charged monthly, quarterly or half-yearly. This is the cost people forget: a large limit “just in case” is not free, and a limit far bigger than you ever use may be worth trimming.
Establishment, review and security costs. Set-up fees, annual reviews and, for secured facilities, valuation and documentation costs. None are dramatic on their own; together they matter when comparing offers.
The right comparison is never just “which rate is lower” but “what will my actual usage pattern cost across a year on this facility” — a calculation a broker can run across multiple lenders in one pass. Ask your lender or broker for current pricing on both secured and unsecured options before assuming either is cheaper for you.
The cash rate has climbed to 4.60%, its highest level since 2011, and unlike a fixed equipment loan, a variable overdraft reprices with every move. If your facility was last negotiated before this tightening cycle began, the margin you agreed then is being charged on top of a much higher benchmark now — which makes a structure review one of the more valuable calls a business can make this quarter.
Business Overdraft vs Business Loan vs Invoice Finance: Match the Facility to the Job
Most working capital problems are really matching problems: the money is needed for a particular shape of gap, and each facility type suits a different shape. Here is how the main options compare — not on price, which moves, but on what each is actually built to do.
| Facility | Built for | How you pay | Watch out for |
|---|---|---|---|
| Business overdraft | Short, recurring timing gaps — wages and suppliers due before customers pay | Interest on the drawn balance only, plus a fee on the whole limit | A balance that never returns to zero — a sign it’s funding something permanent |
| Business term loan | A defined purpose with a defined payback — expansion, acquisition, restructuring core debt | Scheduled repayments over a set term, fixed or variable | Less flexible — but usually cheaper than revolving credit for long-term borrowing |
| Line of credit | Ongoing flexible access, often secured against property at sharper pricing | Interest on funds used, revolving like an overdraft but as a standalone facility | Same discipline required as an overdraft — it should breathe, not sit maxed out |
| Invoice finance | Cash tied up in unpaid invoices to business customers on 30-90 day terms | Fees per invoice funded; the limit grows with your sales ledger | Suits B2B businesses with quality debtors; not a fit for cash-at-till retail |
| Trade / import finance | Paying suppliers for stock months before it sells — seasonal peaks especially | Short-term funding tied to each stock cycle, repaid as goods sell through | Needs reliable sell-through; see our Christmas stock funding guide |
Many businesses end up with a small combination — a modest overdraft for genuine timing gaps, invoice finance that scales with the debtor book, and fixed-rate finance for vehicles and equipment — rather than one oversized facility doing every job badly. Our working capital finance page covers the structuring side in more detail.
The October Squeeze: BAS, Christmas Stock and Payday Super
There is a reason overdraft conversations spike at this time of year. The December quarter concentrates three cash-flow events. First, the July-September BAS: for businesses lodging quarterly themselves, it is generally due 28 October — registered tax and BAS agents can attract later deadlines, so confirm your own date with the ATO or your accountant. Second, retailers, wholesalers and hospitality operators are paying for Christmas stock now, months before it sells. Third, since 1 July 2026, payday super means super leaves the account with every pay run rather than quarterly — a permanent change to the rhythm of outgoings that many businesses are experiencing their first Christmas season with.
Stack those against four rate rises and it is easy to see why a facility that was comfortable in 2024 feels tight in late 2026. The wrong response is letting the overdraft creep to its limit and stay there — the most expensive and most fragile position a business can drift into. The right response is deciding, before the squeeze peaks, which of those pressures belongs on which facility.
Client Example
Picture a wholesale bakery in Werribee supplying cafés across Melbourne’s west on 30-day terms. Its overdraft was set up in 2023 for genuine timing gaps, but over two years it quietly absorbed a delivery van, an oven and a lingering tax bill — so by mid-2026 the facility sat near its limit permanently, with every 2026 rate rise charged on the full drawn balance. The restructure: the van and oven moved onto fixed-rate equipment finance (untouched by future rises), the tax debt onto a dedicated arrangement, and invoice finance now funds the debtor book as it grows. The overdraft dropped to a smaller limit that returns to zero most months — cutting both the interest bill and the line fee. The scenario is illustrative rather than a real client file, and deliberately contains no lender names or rate quotes, but the pattern — an overdraft doing three other facilities’ jobs — is one of the most common we untangle.
How to Put a Better Working Capital Setup in Place
Start with the pattern, not the product. Pull up twelve months of your trading account and look at the shape: how often does the balance go negative, how deep, and for how long? A gap that opens and closes inside a fortnight is overdraft territory. A floor that never rises is core debt wearing an overdraft costume.
Right-size the limit. Because line fees are charged on the approved limit, the cheapest overdraft is one sized to your genuine peak gap with sensible headroom — not the biggest limit you can get approved. Trimming an unused limit is one of the few finance costs you can cut with a phone call.
Decide what security you are willing to offer. Property security usually buys a sharper rate and a larger limit, but ties personal or business assets to the facility. Unsecured costs more but keeps assets clear. There is no universally right answer — only the right answer for your balance sheet and your appetite.
Review annually, and after every structural change. New premises, a big contract won or lost, payday super, a rate cycle like 2026’s — each changes what the right structure looks like. As a broker we compare bank and non-bank options across the market and run the actual-usage cost maths side by side; if you are also weighing premises ownership, our commercial property loans guide covers how that decision interacts with working capital.
Pro Tip
Before your next facility review, export your daily account balances for the past year and mark the lowest point of each month. That twelve-number list tells you (and any lender) almost everything: your true peak funding gap, whether it is seasonal or structural, and whether your current limit is too big, too small or doing the wrong job entirely. Walking into a review with that evidence flips the conversation from “what will you offer me?” to “here is what I need — who prices it best?”
Frequently Asked Questions
What is a business overdraft and how does it work in Australia?
It is an approved credit limit attached to your business transaction account that lets the balance go below zero up to that limit. There is no fixed repayment schedule — the balance falls as customer payments land — and interest is charged daily on the overdrawn amount only, usually alongside a line or facility fee on the whole limit. It is designed for short-term timing gaps in cash flow, not for funding vehicles, equipment or other long-term assets.
Is a business overdraft a good idea in 2026?
For genuine, recurring timing gaps — yes, it remains one of the most flexible tools available, because you only pay interest when you use it. But overdrafts are variable-rate, and 2026’s four cash rate rises mean a drawn overdraft costs noticeably more than it did in January. It is a good idea when it breathes with your cash cycle; it becomes an expensive idea when it sits permanently drawn doing a term loan’s job.
Business overdraft vs business loan — which is better?
Neither is better in the abstract — they do different jobs. An overdraft suits fluctuating, short-term needs where flexibility matters more than the lowest possible rate. A term loan suits a defined purpose with a defined payback period, and usually prices lower for long-term borrowing. If an overdraft balance never returns to zero, that portion of the debt is effectively long-term and is usually cheaper and safer restructured onto a term facility.
How much does a business overdraft cost?
Pricing varies widely by lender, limit size and security, so treat any single advertised rate with caution. The cost has three main parts: variable interest on the drawn balance (typically at a higher margin than home loans, and higher again for unsecured facilities), a line or facility fee charged on the whole approved limit, and establishment or review costs. With the cash rate at 4.60%, comparing your facility’s all-in annual cost against current market offers — secured and unsecured — is worth doing; your broker or lender can quote today’s pricing.
Is Your Overdraft Doing the Right Job — at the Right Price?
We review working capital structures for businesses of every size — overdrafts, term loans, invoice and trade finance — across bank and non-bank lenders, and run the numbers on your actual cash-flow pattern, not the averages. Based near Geelong, working with business owners Australia-wide by phone and video. No obligation.
Melanie McNaughton
Director & Senior Finance BrokerWith years of experience in mortgage broking and finance, Melanie helps first home buyers, refinancers, investors and business owners across Geelong, the Bellarine, the Surf Coast, Melbourne and regional Victoria make their money work harder. Contact our team on 03 9020 2699.