Business line of credit vs overdraft: which wins?

A business overdraft is a limit attached to your everyday transaction account that lets the balance go below zero. A business line of credit is a separate revolving facility with an approved limit that you draw from and repay as needed. The line of credit vs overdraft decision comes down to where the money sits, who will offer it to you, and whether your needs are small and constant or larger and planned.

How does an overdraft differ from a line of credit?

The overdraft is built into your transaction account; the line of credit stands beside it. Business.gov.au’s key financial terms define an overdraft as letting a business withdraw more than the balance of an account, and a line of credit as letting a borrower withdraw up to an approved limit. Its business loan guide calls the line of credit a revolving loan and the overdraft a line of credit attached to your business bank account.

In practice:

• Overdraft: your supplier payments, card settlements and wages all run through one account. If the balance dips, the overdraft catches it automatically.
• Line of credit: you move money across when you decide to, use it, and pay it back when cash comes in. The account it sits in is separate from your daily banking.

Side by side: overdraft vs line of credit

Test	Overdraft	Line of credit
Where it lives	Inside your everyday business account	A separate facility account
Who offers it	Usually the bank that holds your transaction account	Banks and non-bank lenders
How you draw	Automatically, whenever the balance goes below zero	Deliberately, by transfer or drawdown
Security	Banks often look for property or strong financials	Many are sized on turnover and bank statements
What you pay	Interest on the debit balance plus account or limit fees	Interest on the drawn amount plus line or limit fees
Visibility	Easy to drift into without noticing	Every draw is a decision
Best job	Smoothing small daily timing gaps	Funding planned working-capital needs

Our verdict

The overdraft wins on convenience. Nothing to transfer, nothing to remember. For a business whose account occasionally slips below zero for a day or two, that automatic buffer is exactly right.

The line of credit wins on reach and discipline. It is offered by a wider range of lenders, including non-banks that size it on turnover rather than property. And because each draw is deliberate, it is easier to see what you are borrowing and why. The RBA’s October 2025 Bulletin notes that the non-bank share of SME lending has grown strongly since early 2022, particularly for smaller loans, which broadens the line-of-credit options open to owners without bank-grade security.

Choose an overdraft if…

• Your bank already knows you and will offer a sensible limit on terms you are comfortable with.
• The gaps are small, frequent and short, usually cleared within days.
• You want everything in one account with no transfers to manage.
• You are disciplined about checking the balance, because the convenience can hide creeping debt.

Choose a line of credit if…

• Your needs are bigger and lumpier, tied to stock, payroll or customer payment cycles.
• Your bank wants property for an overdraft and you’d rather not offer it.
• You want a clear record of each draw and its purpose.
• You may want to move lenders later without changing your everyday banking.

For a fuller verdict on the product itself, read our best business line of credit page. If a single purchase is behind the need, our line of credit vs term loan verdict is the better comparison. And if you would like someone to look at your numbers now, send a short enquiry.

Illustrative example: the same need through each facility

Illustrative only. Round numbers.

A food wholesaler turns over about $150,000 a month. Supermarket customers pay on long terms, so each month there is a stretch of about three weeks where the account needs up to $60,000 of support.

• Overdraft: her bank offers a $60,000 overdraft but wants a mortgage over her home. Every supplier payment simply runs the account into the red, and the balance falls back as customers pay. It works smoothly, but the limit is now tied to her home.
• Line of credit: a non-bank offers a $60,000 line of credit sized on twelve months of bank statements, without property. She draws $40,000 at the start of the gap and $20,000 later if needed, then repays as customer receipts land.

To compare, she works out the likely dollar cost of each for a year: average amount drawn, interest on that balance, plus every fee, including fees on the unused part of the limit. The cheaper-looking product on paper is not always cheaper at her real usage.

What does each really cost?

Both usually charge on what you use plus a fee for having the limit available. The trap is comparing headline pricing instead of total dollars. Ask each lender for:

1. The interest charged on your expected average balance over a year.
2. Every fee: establishment, monthly or annual limit fees, line fees on unused limits, and dishonour or over-limit fees.
3. Any costs to reduce, close or move the facility.

Add those up for a realistic year and you have a fair comparison. Our total cost comparer does the arithmetic once you have the numbers.

How do lenders assess each one?

Banks offering an overdraft usually start with the relationship. They look at how your transaction account has been run, your financial statements, your credit history and, often, what security you can give. A clean account with no dishonours and a long history counts for a lot.

Line-of-credit lenders, especially non-banks, lean more heavily on recent bank statements. They want to see regular deposits, a steady or growing turnover, few returned payments and existing debts that the business is clearly handling. Many will size a limit as a share of monthly turnover rather than against property.

Either way, three things help:

• Current BAS lodgements, even if you owe the ATO something under a plan.
• A clear reason for the limit, such as a stock cycle or slow-paying customers, with rough timing.
• Honest disclosure of other facilities, because lenders will see them anyway.

When does neither one fit?

When customers are the problem rather than the cash cycle. If the gap exists because invoices take 60 days or more to be paid, invoice finance often beats both, because it grows with your sales instead of sitting at a fixed limit. Our invoice finance vs overdraft verdict sets out that choice. And if the gap is a temporary slump rather than a timing issue, read our verdict on the best loan in a slow quarter first.

Still comparing? Browse all our business loan head-to-heads for the other working-capital match-ups.

Ready to set the right limit?

The right facility is the one that matches how your cash actually moves. See which working-capital option you qualify for by telling us your monthly turnover, the size of the gap and whether property is available.

There is no credit check on that first enquiry. Your details stay with one specialist rather than being passed around a panel of lenders, and a real person reads your answers and calls back. Give accurate turnover figures and existing limits so the facility you are offered is sized properly from day one.

For the wider cash flow picture, our verdict on the best business loan for cash flow compares every working-capital structure side by side.