How it works

Here's an example of how a business overdraft might help you

1. You have a $10,000 business overdraft

You can use your overdraft in case of unexpected business expenses.

2. You get an unexpected supplier bill for $8,000

Unexpected business expenses can negatively impact your cash flow. 

3. You use your overdraft to pay the bill

Your overdraft could cover your shortfall until you receive your regular business income. 

4. You only pay interest on the amount you've used

Rates and fees can vary, please refer to our business banking reference rates and fees. 

Features & benefits

Manage cash flow

Get access to available funds when needed so you can pay for bills, salaries and supplier invoices. 

Link to a transaction account

Connect to your preferred CommBank business account, such as the Business Transaction Account. If you don't have one, we can open one for you with your overdraft.

Secured and unsecured options

Your business overdraft could be secured by residential, commercial or rural property or other business assets. It could also be unsecured, subject to credit approval. 

Easy to access

Access your overdraft just like you would funds in your business account, using an ATM, NetBank, CommBiz, EFTPOS, cheque, over the phone, in branch and the CommBank app

Rates & fees

Competitive rates & fees

The rates and fees you'll be charged will depend on your overdraft limit and other options you choose. Your business banker will discuss these with you.

They may include:

  • Interest rate from 7.68% p.a.1 You only pay this on the amount you use.
  • Line fee from 1.12% p.a.1 charged quarterly or monthly, on your highest limit or balance. This fee is for making your overdraft available to you 24/7.
  • Establishment fee. This is a one off fee charged at the establishment of your overdraft.

Ready to apply? 


Subject to eligibility and credit criteria, a business overdraft may be suitable for businesses of any size with a cash flow need, including:

  • Sole traders
  • Partnerships
  • Trusts 
  • Limited or proprietary limited companies

How to apply

You can start your application online. You'll need your ABN or ACN and you may be asked for documents that help us understand your current situation.

These can include:

  • Financial statements
  • Proof of individual income
  • Bank statements

Here's some more about documents you may need. 

Once submitted, a business banker will give you a call to finalise your application. 

Alternatively, call 13 1998 to speak to one of our business bankers.


Request a callback

Download a fact sheet

Things you should know

1Please refer to the overdraft reference rates and fees within our business banking rates and fees, as these are subject to change. Interest rate margins will apply.

Applications for finance are subject to the Bank’s eligibility and suitability criteria and normal credit approval processes. Full terms and conditions are included in the Letter of Offer. Bank fees and charges may apply

This information has been prepared without taking into account your individual or business objectives, financial situation or needs. You should read and consider our Current Terms and Conditions for Business FinanceFinancial Services Guide (PDF 59kb) and business transaction account terms and conditions before making a decision about these products.  

Terms and conditions issued for CommBiz and NetBank are available on our website at, from any of our branches or by phoning us on 13 2221, and should be considered before making any decision about these products. For current interest rates, visit