Compare Finance Options · 5 min read
Business line of credit vs overdraft: which is right for your cash flow?
They look alike but price very differently. How the two compare on cost, flexibility, security and speed — and which suits your cash-flow gap.
Short answer
They solve the same problem — short-term cash-flow gaps — but they're built differently and priced differently. An overdraft is attached to your business transaction account and lets your balance go below zero up to an agreed limit. A line of credit is a separate revolving facility you draw on independently of your everyday account. The practical difference that matters: overdrafts often charge a fee on your wholelimit whether you use it or not, while a line of credit typically charges interest only on what you've drawn — and usually at a lower rate.
Side by side
| Line of credit | Overdraft | |
|---|---|---|
| Attached to | A separate revolving facility | Your transaction account |
| You pay for | Only the drawn balance | The drawn amount, often plus a line fee on the full limit |
| Typical rate | Generally lower | Generally higher |
| Provider | Banks and non-bank lenders | Mostly banks |
| Approval speed | Fast through non-bank lenders (hours) | Often slower, relationship-based |
| Security | Unsecured options available on cash flow | Often requires security or an existing banking relationship |
| Best for | Ongoing or planned funding needs | Small, frequent, unpredictable shortfalls |
Rates and fees vary widely by lender, facility size and your trading profile. The only number that matters is the one on your actual offer.
Where each one wins
Choose an overdraft when the gaps are small, frequent and unpredictable, and you value having the buffer sitting right on the account you already transact from. The trade-off is cost: overdrafts commonly carry an establishment fee and a line fee charged on the full approved limit, so you can pay for capacity you never draw.
Choose a business line of credit when your funding needs are ongoing or planned — smoothing seasonal dips, bridging invoice cycles, holding a buffer you only pay for when you use it. Because a line of credit is a separate facility, non-bank lenders can approve one on your cash flow in hours, without the bank relationship an overdraft usually assumes.
For larger or longer needs, neither may be the answer — a term loan or working-capital finance can be cheaper for a defined lump sum, and a business credit card covers small everyday spend with an interest-free float.
The cost trap most people miss
The headline rate isn't the whole cost. An overdraft's line fee on the full limit means a $100,000 overdraft can cost you even in a month you draw nothing. A line of credit's “pay for what you draw” structure is why it usually works out cheaper for a buffer you dip into occasionally — but check for any facility fee on the line too, because some lenders charge one. Compare the all-in cost, not just the advertised rate. Avoir matches you to lenders on a soft check, so comparing doesn't touch your score.
FAQ
Is a line of credit cheaper than an overdraft?
Usually, for two reasons: lines of credit generally carry lower interest rates, and you pay interest only on what you draw rather than a fee on the whole limit. Always compare the all-in cost including any facility or line fees.
What's the main difference between an overdraft and a line of credit?
An overdraft is attached to your transaction account and lets the balance go negative up to a limit. A line of credit is a separate revolving facility you draw on independently. The line of credit usually charges only on the drawn balance.
Can I get a line of credit or overdraft without security?
Unsecured lines of credit are available from non-bank lenders based on your cash flow and trading history. Overdrafts more often require security or an established banking relationship.
Which is faster to set up?
A line of credit through a non-bank lender is typically faster — assessed in hours on your recent trading — whereas bank overdrafts tend to be slower and relationship-based.
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By James Baker · Founder, Avoir
Founder of Avoir and a commercial finance specialist focused on asset and equipment finance for Australian transport, civil and construction businesses.
Last reviewed: 24 July 2026
General information only, not financial advice. Compare the actual terms of any offer before deciding. Avoir is not a lender or credit provider; all credit decisions are made independently by our lending partners.