Business Overdrafts in Australia: How They Work, What They Cost, and Property-Backed Alternatives

Jul 10
9 min read

A business overdraft in Australia lets a company draw its trading account below zero up to an approved limit. It is priced, structured and reviewed like a facility, not a transaction. For property-owning SMEs it is one of several working capital tools, and often not the cheapest or fastest once the bank tightens its policy. This guide explains how business overdrafts work, what they usually cost, and where property-backed lending sits alongside them.

A business overdraft in Australia is a revolving credit facility attached to a trading account, usually offered by the major banks. Limits typically sit between $10,000 and $500,000. Indicative interest rates for a secured business overdraft sit around 8% to 12% per annum, with unsecured facilities generally higher. Approval depends on trading history, servicing, security offered, and the bank's current appetite for the industry.

A business overdraft is a revolving credit facility attached to a business trading account, priced on the drawn balance.
Major bank secured business overdrafts in Australia typically sit around 8% to 12% per annum, with unsecured facilities usually higher.
Overdrafts suit short-term working capital gaps, seasonal cash flow, and timing mismatches, not long-term funding.
Property-backed alternatives, including secured business loans and second mortgages, may fund faster and to a higher limit when the bank declines an overdraft increase or new facility.

What a business overdraft actually is

A business overdraft is a revolving credit facility linked to a trading account. The bank sets an approved limit. The business can draw the account into negative territory up to that limit, then repay and redraw as cash flow allows. Interest is charged on the drawn balance, not on the full limit.

Business overdrafts sit under business-purpose lending. That means NCCP consumer protections generally do not apply, and the lender is entitled to price and structure the facility for a commercial borrower rather than a household.

Overdrafts are usually reviewed annually. The bank reserves the right to reduce or withdraw the limit at review, often on 30 days' notice, subject to the facility agreement. A borrower who assumes the overdraft is permanent capital can be caught out at review.

How business overdrafts work in practice

The trading account operates as normal. Direct debits, supplier payments, wages and BAS can push the balance below zero within the approved limit. Once revenue lands, the balance moves back up and interest stops accruing on that portion.

The bank typically requires:

Two years of trading history for a full-doc overdraft.
Financials and BAS to demonstrate servicing.
Security, such as a first mortgage over commercial or residential property, a general security agreement over business assets, or a personal guarantee.
Confirmation of business purpose.

For small or newer businesses, a secured overdraft against residential property may still be available where an unsecured facility is not. Pricing usually improves with property security.

What a business overdraft costs in Australia

Rates vary by lender, security, and facility size. Indicative ranges, based on major bank published information and broker experience:

Secured business overdraft (residential or commercial property security): approximately 8% to 12% per annum on the drawn balance.
Unsecured business overdraft: often 12% to 18% per annum or higher, depending on the bank and risk band.
Establishment fee: commonly 0.5% to 1.0% of the limit.
Line fee (also called facility fee or unused-limit fee): commonly 0.5% to 1.5% per annum of the approved limit, charged whether or not the facility is drawn.
Annual review fee: often several hundred dollars.

The line fee is the part borrowers most often miss. A $200,000 overdraft with a 1% line fee costs $2,000 per year even if the facility is not drawn. That is the price of having the capacity available.

Rates are indicative and subject to lender assessment. Verify current pricing directly with the lender before making a decision.

Secured vs unsecured business overdrafts

The core difference is what the lender takes as security and what that does to the price and limit. Secured overdrafts, backed by a first mortgage over property or a general security agreement over business assets, typically price at around 8% to 12% per annum with limits from $50,000 to $500,000 or more, and take 2 to 6 weeks to approve once valuation is complete. Unsecured overdrafts, backed only by a general security agreement and personal guarantees, usually price at 12% to 18% per annum or higher, with limits from $10,000 to $150,000, and can approve in 1 to 3 weeks.

Property-owning SMEs generally get better pricing and a higher limit by offering property security. That is also the reason property-backed private lending sits so close to the overdraft market, especially when the bank cannot move fast enough.

When a business overdraft suits

A business overdraft is a strong tool where cash flow is genuinely lumpy but the underlying business is healthy. Common fits include:

Seasonal businesses covering wages and stock before peak revenue.
Trade and construction businesses funding materials before progress payments.
Businesses on 30 to 60 day terms with reliable debtors.
SMEs smoothing quarterly BAS or PAYG timing.
Established businesses that want committed standby capacity for opportunities.

The core test is that the balance moves in and out of the overdraft across the year. If it sits fully drawn every day, it is really long-term debt in the wrong wrapper, and a term loan is usually cheaper and safer.

When a business overdraft may not suit

An overdraft is not always the right answer. It may not suit where:

The borrower needs a specific dollar amount for a specific project rather than revolving capacity.
The bank has already declined an increase due to industry, credit file or servicing.
Settlement is required in 3 to 10 business days and the bank cannot meet the timeline.
The security is a partly built property, land, or an unusual asset the bank will not lend against.
The business has ATO debt, tax arrears or recent defaults that make bank credit unlikely.
The facility is expected to remain fully drawn, in which case a term loan is more transparent and often cheaper.

In each of these scenarios a property-backed private lending option may fit better. That is the practical gap Innovate Funding works in.

Property-backed alternatives to a business overdraft

For a property-owning SME, the strongest alternatives are structured against existing property equity rather than the trading account. The three most common structures.

Secured business loan. A term loan for business purposes, secured by a first or second mortgage over residential, commercial or industrial property. Typical private lending pricing sits around 9% to 14% per annum for first mortgage security and 12% to 18% per annum for second mortgage security, with terms of 1 to 24 months. Interest is often capitalised into the loan, which frees up cash flow during the term.
Second mortgage. Sits behind an existing bank first mortgage. Useful where refinancing the bank loan would be expensive, slow, or would trigger break costs. The second mortgagee needs consent from the first mortgagee and prices for the second-ranking security. LVR bands are typically up to 75% combined LVR for metro Sydney and Melbourne security.
Caveat loan. A short-term facility secured by a caveat lodged on title, used where a full mortgage cannot be registered quickly. Fast to settle where the timing pressure is real, usually 3 to 10 business days. Terms are short, generally 1 to 6 months, at higher indicative rates than a registered mortgage.

None of these replaces an overdraft one-for-one. They replace the funding job the overdraft was being asked to do, usually with a clearer term, a defined exit, and a faster settlement.

Overdraft vs private lending: side by side

Bank overdrafts and property-backed private lending each solve part of the working capital puzzle. Bank overdrafts are revolving, usually secured by property, a GSA and guarantees, priced at approximately 8% to 18% per annum on the drawn balance, and settle in 2 to 6 weeks. They win on cost of standby capacity and flexibility. Property-backed private lending is term-based, usually 1 to 24 months, secured by a first mortgage, second mortgage or caveat, priced at approximately 9% to 18% per annum capitalised or interest-only, with settlement in 3 to 15 business days. It wins on speed, on lending to borrowers the bank has already declined, and on releasing equity the bank will not release without a full refinance.

Real scenario

Consider a Sydney SME that runs a mechanical services business. Turnover is $2.1 million. The owners hold a $1.6 million home in Ryde with a $780,000 first mortgage. They have a $150,000 overdraft with their major bank, fully drawn against a stalled commercial job.

They ask the bank for a $100,000 overdraft increase. The bank declines on the current file due to a recent ATO payment plan. The owners need funds within two weeks to buy materials for a new $400,000 contract that starts next month.

A private lender writes a $250,000 second mortgage behind the existing bank first mortgage. Total lending on the home is $780,000 first plus $250,000 second, or $1.03 million against a $1.6 million valuation. Combined LVR is 64%. Indicative rate is 12.95% per annum, interest capitalised into the loan. Term is 9 months. Establishment fee is 2.0%. Exit strategy is progress payments from the new contract, with a portion set aside to pay out the second mortgage in full inside the term.

Numbers are indicative only and subject to lender assessment, valuation and credit approval. Every deal is different.

How lenders assess property-backed working capital

For a private lender, the key inputs are the property, the LVR, the loan purpose, the exit strategy, and the borrower's track record. The bank credit file matters but is not the gating factor.

Documents typically requested:

Rates notice and title search for the security property.
Existing first mortgage payout figure and consent, where a second mortgage is involved.
Basic identity documents for the borrower and any director.
Written statement of loan purpose (business purpose declaration).
Evidence of exit strategy, such as a contract, sale campaign, refinance approval in principle or debtor schedule.

Full BAS and financials may be requested for larger facilities. For shorter-term facilities of 1 to 6 months, some private lenders will proceed on a lighter documentation basis where the equity, LVR and exit are strong. That is the reason a caveat loan or short second mortgage can settle in days rather than weeks.

How Innovate Funding helps

Innovate Funding works with private and non-bank lenders across Australia to structure property-backed lending for SMEs, business owners and property owners. Where a bank overdraft has been declined, capped or withdrawn, we look at the equity in the security property and shape a facility around the LVR, the purpose and the exit.

Common structures we help borrowers access:

Secured business loans against residential, commercial or industrial property for working capital, tax debt, contract funding and stock.
Second mortgages behind an existing bank first mortgage, where a full refinance would be expensive or slow.
Caveat loans for short-term settlements of 1 to 6 months where speed is the deciding factor.
Short-term business loans for bridging funding, ATO debt or single-project cash flow needs.

We do not offer bank overdrafts. We help borrowers work out whether a term facility, a second mortgage or a caveat loan will do the same working capital job faster or with less friction, and when to stay with a bank overdraft instead.

Key takeaways

A business overdraft is a revolving business-purpose facility, not a term loan, and is reviewed annually.
Secured business overdrafts in Australia typically sit around 8% to 12% per annum, with unsecured facilities higher.
Line fees on the full limit can be the largest hidden cost of an underused overdraft.
Property-backed alternatives may fund faster, lend against equity the bank will not release, and support borrowers the bank has already declined.
The decision between an overdraft and a property-backed loan should turn on purpose, timing, exit strategy and appetite for a revolving versus a term structure.
Innovate Funding does not offer overdrafts but structures property-backed funding when a bank overdraft is not the right fit.

FAQ's Business Overdrafts in Australia

What is a business overdraft in Australia?

A business overdraft is a revolving credit facility linked to a business trading account. The bank sets an approved limit and charges interest only on the drawn balance. It suits short-term cash flow gaps, seasonal trading and timing mismatches rather than long-term funding.

What interest rate should I expect on a business overdraft?

Indicative rates for a secured business overdraft in Australia usually sit around 8% to 12% per annum on the drawn balance. Unsecured facilities are typically higher, often 12% to 18% per annum. All pricing is subject to lender assessment, security offered and current credit policy.

Do I need property to get a business overdraft?

Not always. Unsecured business overdrafts are available for established businesses with strong trading history, but limits are usually lower and pricing higher. Property security, such as a first mortgage over a home or commercial property, generally unlocks a higher limit and a sharper interest rate.

Can I get an overdraft with bad credit or ATO debt?

It depends on the lender. Major banks are usually cautious about defaults, arrears or an active ATO payment plan. Property-backed private lending against equity in a home or commercial property may still be available, subject to LVR, purpose and a credible exit strategy.

What is a good alternative to a business overdraft?

The three most common alternatives for a property-owning SME are a secured business loan against property, a second mortgage behind an existing bank first mortgage, and a caveat loan for very short timelines. Each is a term facility with a defined exit rather than a revolving line.

How fast can a property-backed alternative settle?

A registered second mortgage or first mortgage typically settles in 5 to 15 business days once valuation and consent are in place. A caveat loan may settle in 3 to 10 business days where the equity, purpose and exit are clear. Timeframes are indicative and subject to valuation and lender assessment.

Talk to Innovate Funding

If your bank has declined a new overdraft or an increase, or the facility no longer matches the working capital job you need to get done, we can help you review property-backed options. Contact Innovate Funding for an indicative structure and next steps. This article is general information only and does not consider your circumstances. Seek independent legal, tax and financial advice before entering any credit facility.