Understanding CommBank offset account terms

How CommBank offset accounts work

Olesya Krasavtseva
Fact-checked by Olesya Krasavtseva
Content Editor at Prostobank Consulting Prostobank Consulting Logo
Updated: 01.09.2026
Table of Contents

An offset account is a transaction account linked to your home loan. Instead of earning interest on your savings, the balance in your offset account is subtracted from your home loan balance before interest is calculated. This means you only pay interest on the net amount, which can help reduce the total interest paid over the life of your loan.

It is important to note that these accounts are distinct from standard savings accounts. While your money remains accessible for day-to-day transactions, the financial benefit is realized through the reduction of your daily loan interest accrual. Because of this, the terms and conditions vary depending on the specific home loan product you hold.

Key Offset Account Information

Category Details
Access Methods CommBank App, NetBank, or via branch
Processing Time Interest calculations update daily based on account balance
Eligibility Variable rate home loans (select products only)
Key Requirements Account must be explicitly linked to your eligible loan

Step-by-Step: Managing Your Offset Link

If you have an eligible home loan and wish to ensure your offset account is functioning correctly, you can check the linking status through your digital banking platform. Follow these steps to verify your setup:

  1. Log in to NetBank or the CommBank app.
  2. Search for 'Offset' and select 'Manage my offset'.
  3. Click on 'Link an offset' and choose your eligible transaction account to switch.
  4. Confirm your home loan details and complete the process.

Troubleshooting Common Issues

If your account does not appear to be offsetting your loan, consider these common scenarios:

  • MFA or Login Issues: If you are locked out of your digital banking, reset your access via the 'forgot password' or 'recover ID' flow. If the issue persists, contact support to verify your identity.
  • Browser or App Errors: If the link status is not displaying correctly, clear your browser cache or force-close the app to clear potentially outdated data. If the error continues, try using a different device or browser.
  • Locked Account or Access Issues: If you cannot modify your linked accounts, ensure you are the primary account holder. If your access remains restricted, call the home loan support team to check if there is a hold on your specific loan account.

Pro-Tip: Check your loan statement regularly to see the "interest charged" line item. If the amount does not appear to decrease in line with your average offset balance, it may indicate your account is not correctly linked or is not eligible for the offset feature. Contact the bank to clarify your specific loan product’s offset terms.

Frequently Asked Questions

Why am I not seeing a reduction in my loan interest?

This often happens when an account is used for daily banking but has not been formally 'linked' to the home loan in the bank's system. An offset account must be specifically set up to offset the interest on the loan, not just a standard savings account. Check your account settings in NetBank to ensure the offset functionality is active. If you are unsure, contact the support team to confirm the account status.

Can I use an offset account with a fixed-rate loan?

In most cases, standard offset accounts are not available for fixed-rate home loans. These loan products typically lock in the interest rate and repayment amount for a set period, meaning they operate differently than variable rate loans. If you are approaching the end of your fixed-rate term, you may wish to discuss switching to a variable product that supports offset features with a lending specialist.

Official Bank Information

Commonwealth Bank (CBA)

Support: 13 22 21

SWIFT Code: CTBAAU2S

Video Guides

Watch our expert video reviews to navigate Australian banking with ease.

Bank's Services and Products

Find and compare the best banking products tailored to your financial goals.

Personal Banking

Personal credit cards

Show details
Credit limit range: 400 dol to 1500 dol No physical card provided (digital only) Monthly minimum repayments: 40 dol or less Access to CommBank Yello Cashback Offers No additional cardholders allowed Does not earn Awards points

Personal debit cards

Show details
Applicant must be at least 18 years old Must have an Australian residential address Must hold an existing linked standard Debit Mastercard to upgrade Must be linked to an eligible CommBank transaction account Includes complimentary international travel insurance for trips up to 21 days (requires activation) Includes two complimentary airport lounge passes worldwide via Mastercard Travel Pass Features Price Guarantee, Purchase Security, and Extended Warranty insurances

Personal savings accounts

Show details
Must be 14 years or older to apply Requires a linked eligible CommBank transaction account Introductory bonus rate of 4,95% p.a. applies for the first 5 months

Personal transaction accounts

Show details
Must be 14 years or older Requires identity verification at a branch within 20 days if applying from overseas Includes physical and digital Debit Mastercard Eligible for CommBank Yello rewards with 5+ transactions monthly Access to digital tools like Bill Sense and Spend Tracker

Loans & Mortgages

Personal Car loans

Show details
No vehicle security or collateral is required Offers complete flexibility to make unlimited extra repayments without any fee Includes a redraw facility to access available funds if needed

Personal Home Loans

Show details
Discount margins vary based on Loan to Value Ratio (LVR) tiers up to 95% Freedom to split the loan and utilize multiple Everyday Offset accounts Interest Only payments available for up to 5 years (Owner Occupied) or 15 years (Investment) Minimum topup amount is 10000 AUD Variable rate is not protected from interest rate increases

Personal loans

Show details
No security or collateral required Includes a redraw facility to access extra funds paid into the loan Discounted rates available for eligible energyefficient purchases Repayments may fluctuate if the interest rate changes Repayment frequencies available: weekly, fortnightly, or monthly

Business Solutions

Business accounts

Show details
Must have an Australian Business Number (ABN) or Australian Company Number (ACN)Applicant must be at least 18 years oldRequires an existing eligible Commonwealth Bank AUD accountAccount must be used strictly for business purposesInterest is paid monthly on selected currencies based on balance tiersOnline application available for sole traders, Pty Ltd companies, SMSFs, and partnerships

Business car loans

Show details
Must have a current ABN and a minimum of 12 months trading history The financed vehicle or equipment serves as the loan security Optional balloon payments available to reduce ongoing monthly commitments Repayments can be customized to align with seasonal business cashflows Discount of up to 1,00% p.a. available for eligible green and efficient vehicles

Business credit cards

Show details
Up to 55 days interestfree period on purchases Minimum unsecured credit limit of 500 AUD, maximum up to 50000 AUD Includes Transit Accident Insurance and Unauthorised Transaction Insurance Access to personalized CommBank Yello Cashback Offers Features 24/7 emergency overseas assistance

Business loans

Show details
Must have a current ABN and a minimum of 12 months trading history The financed vehicle or equipment serves as the loan security Optional balloon payments available to reduce ongoing monthly commitments Repayments can be customized to align with seasonal business cashflows

Business savings

Show details
Allows early withdrawal of up to 20% of the balance without penalty fees or interest adjustmentsRequires a CommBank business transaction account in the same business nameMust have an Australian Business Number (ABN)

Find bank, branch or ATM

Locate the nearest financial services, interactive maps, and contact details across Australia.