Quick answer: A business overdraft lets your business keep spending after the trading account hits zero, up to an agreed limit — you only pay interest on what you actually use. It is the classic buffer for short-term cash-flow gaps (a slow-paying client, a quiet month, a big materials bill), not for funding a large one-off purchase. For that, a term loan or asset finance usually fits better.
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What is a business overdraft?
A business overdraft is a credit facility attached to your business transaction account. Once approved for a limit, you can draw the account into negative up to that limit and repay as income comes in. You are charged interest only on the drawn balance, usually plus a line fee on the facility. It suits businesses with lumpy or seasonal cash flow that need a revolving buffer rather than a fixed lump sum.
How a business overdraft works
- Approved limit — for example a 20,000 or 50,000 dollar limit against your trading account.
- Draw as needed — the account simply goes below zero when you spend beyond the balance.
- Interest on what you use — charged on the negative balance only, not the whole limit.
- Repay as you go — deposits reduce the drawn balance automatically; the limit stays available.
- Secured or unsecured — larger limits are often secured; smaller limits may be unsecured at a higher rate.
What a business overdraft costs
Overdrafts typically carry an interest rate on the drawn balance plus a line fee (a percentage of the limit, charged whether or not you use it), and sometimes establishment or review fees. Because you pay to have the limit available, an overdraft is most cost-effective when you genuinely use the buffer periodically — not as a facility you set up and never touch. Rates and fees vary by lender, security and your trading history; we compare options so the cost fits how you will actually use it.
Business overdraft vs the alternatives
Different cash-flow problems call for different tools:
| Facility | Best for | Structure |
|---|---|---|
| Business overdraft | Day-to-day shortfalls, buffer against timing gaps | Revolving, attached to your trading account |
| Business line of credit | Ongoing revolving access, larger standalone limit | Revolving, separate facility |
| Invoice finance | Cash tied up in unpaid invoices | Advance against receivables |
| Unsecured business loan | A defined one-off need repaid over a term | Lump sum, fixed term |
| Cashflow finance | Broader working-capital funding | Varies |
An overdraft and a line of credit look similar; the practical difference is that an overdraft is built into your bank account for everyday dips, while a line of credit is a standalone revolving facility, often larger. Many businesses use an overdraft for the small day-to-day gaps and a term or asset facility for planned purchases.
Is a business overdraft right for you?
An overdraft earns its keep when your income is irregular but reliable — you know the money is coming, you just need to bridge the timing. It is a poor fit for funding a truck, plant or fit-out (use asset finance or equipment finance for those) or for a persistent shortfall that a facility only masks. Built for tradies — but we help businesses of every kind get the working-capital structure that actually fits.
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Frequently asked questions
How does a business overdraft work?
It is a credit limit attached to your business transaction account. You can draw the account below zero up to the limit and repay as income arrives, paying interest only on the negative balance (usually plus a line fee).
What does a business overdraft cost?
Typically interest on the drawn balance plus a line fee on the limit, and sometimes establishment or review fees. It is most cost-effective when you actually use the buffer periodically. Rates vary by lender, security and trading history.
What is the difference between an overdraft and a line of credit?
An overdraft is built into your trading account for day-to-day shortfalls; a line of credit is a standalone revolving facility, often larger. Both are revolving, but they sit in different places.
Do I need security for a business overdraft?
Smaller limits may be unsecured at a higher rate; larger limits are often secured against property or business assets. It depends on the lender and the limit.
When should I use an overdraft instead of a loan?
Use an overdraft for short-term timing gaps in cash flow. For a defined one-off purchase repaid over time, a term loan or asset finance usually costs less and fits better.
Written and reviewed by the Finance Director at Tradie Finance.
This is general information only and not credit or financial advice; it does not consider your objectives or situation. Tradie Finance operates under Australian Credit Licence 506065 (Five Tees Pty Ltd). Business lending is subject to approval, lending criteria, terms, conditions and fees; any rates or fees are indicative and subject to change.