Could your business benefit? 

  • Flexible cash flow management

    • An overdraft is a revolving credit facility so you can continue to access funds as and when you need
    • Manage unexpected expenses, or cover the cash flow gap between receiving payment from customers and paying your suppliers
  • Access funds anytime

  • Only pay for what you use

  • Quick online application

    • If eligible, you could get an unsecured business overdraft between $2,000 and $100,000 by applying online – it takes around 15 mins.
      Or request a callback if your business doesn’t bank with us
    • You don’t need to upload documents when you apply online
    • Need over $100,000? Request a callback or visit us in branch for secured overdraft options

Rates & fees

Rates and fees depend on the type of security you provide for your loan, your loan amount, and other factors. We'll confirm what they are in your Letter of Offer.

Generally you will be charged

  • A one-off Establishment Fee, charged when we set up your overdraft. If you’re eligible to apply for an overdraft through BizExpress, we may waive this fee.1
  • Line Fee from 1.12% p.a. which applies to your approved limit 2
  • Interest on the used amount of your approved limit. Refer to the table of overdraft reference rates and business loan rates
Rate name
Interest rate
Residential Equity Rate*
Corporate Overdraft Reference Rate*
Overdraft Index Rate*
*Interest rate margin applies

Are you eligible? 

  • Who is eligible

    Registered Australian businesses who are:

    • Sole traders
    • Partnerships
    • Trusts
    • Limited or proprietary limited companies
  • You're more likely to be approved if:

    • You haven't been overdrawn or had your account in arrears anytime in the past 3 months
    • You haven't been declared bankrupt in the last 5 years
    • You haven't had any accounts in collections in the past 6 months

How to apply

  • Apply online in 15mins (unsecured only)

    • If your business already banks with us, you may be eligible to apply online for an unsecured business overdraft between $2,000 - $100,000
    • You’ll need a Business Transaction Account – we’ll link your overdraft to it
    • Before you start, check your contact details are up-to-date in NetBank

    Apply in NetBank

  • Request a callback or call 13 1998

    • If you’re new to CommBank or you want a secured overdraft, you can request a callback from one of our team
    • We’ll give you a call in 1-2 business days and answer any questions you have
    • And if you decide to apply, we can help you with that too

    Request a callback

Requesting a callback or applying in branch?

  • It helps to understand your current situation. Have these handy before you apply.

    • Your ABN or ACN
    • Financial statements from the last 6 months
    • Proof of income from the last 6 months
    • Bank statements from the last 6 months

    Here’s a full list of documents  we may ask to see.

Case study

Annabel is a sole trader who runs a property management business and receives payments from her customers at the end of each month.

She sometimes receives bills which exceed her cash balance and are due before her monthly customer payments come in. So she can pay her suppliers she sets up an overdraft to cover the shortfall until she receives her regular monthly payments.

Annabel benefits from an overdraft because she doesn't have to draw money from a separate loan. Instead she can access the funds she needs for her suppliers and other expenses directly from her transaction account. 

Annabel pays interest on the cash she draws against the account, but she has the full balance available so it's there when she needs it. An overdraft limit is in place, similar to a credit card limit on a credit card.

Annabel secured the overdraft against her business, and benefits from a lower rate for using her overdraft. 

Alternatives to a business overdraft

BetterBusiness loan

  • A simple business loan for short to medium term finance needs
  • For loans from $10,000

Go to BetterBusiness loan

Bank guarantee

  • Guarantee payment to a third-party, including landlords, partners, and suppliers
  • Guarantees from $5,000

Go to Bank guarantee

Market rate loan

  • Get a transparent market rate 
  • For loans from $500,000

Go to Market rate loan

Car & equipment finance

  • Tailored to fund eligible income-generating equipment
  • Equipment loan, finance lease and hire purchase available

Go to Car & equipment finance

Things you should know

  • 1 If you are applying for an unsecured overdraft of less than $250,000 and are eligible to apply online through BizExpress, we may waive this fee.

    2 Line fee: An overdraft line fee is charged for making your business overdraft available to you 24/7. It is charged on your highest limit or balance.  It is calculated daily but charged on the 1st of every quarter (March, June, September, December). If you exceed your business overdraft limit, your line fee rate will stay the same (and other fees and interest charges may apply, such as an Overdrawing Approval Fee and Excess Drawing Rate). Your line fee will be charged on the total balance, meaning it will apply to your approved overdraft limit plus the amount you exceed the limit by.

    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.

    This information is current as at 5 August 2020 and is for general information purposes only. It has been prepared without considering your objectives, financial situation or needs. You should consider the appropriateness of this information to your circumstances before acting on it.

    Credit provided by the Commonwealth Bank of Australia. These products are only available to approved business customers and for business purposes only. This offer cannot be used to refinance existing debt or purchase an asset. Applications for finance are subject to the Bank's eligibility and suitability criteria and normal credit approval processes. View our current Terms and Conditions for Business Finance, Electronic Banking and Business Savings and Transaction Accounts, Financial Services Guide (PDF) and the Target Market Determination and consider them before making any decision about these products. For current interest rates, visit business banking rates and fees. Rates are subject to change. Fees, charges and Terms & Conditions apply.

    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