Understanding Westpac Mortgage Offset Accounts

Managing Your Westpac Mortgage Offset Facility

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 eligible Westpac home loan. By keeping your savings in this account, you effectively reduce the balance on which interest is calculated, which may lower the amount of interest you pay over the life of your loan.

This setup allows you to keep your funds accessible for daily expenses while still having them work to reduce your loan interest. Not all home loan products include an offset facility, so it is helpful to check your specific loan contract or the online banking portal to see if your current package supports this feature.

Offset Account Key Information

Category Details
Management Methods Westpac App, Online Banking, and in-branch assistance.
Processing Time Account linking typically occurs within one business day.
Eligibility Requires an eligible variable rate home loan product.
Key Requirements Must be a personal (not investment-linked if excluded) account.

Setting Up Your Offset Link

If you have an eligible loan, you can often link or open an offset account through your digital banking. Follow these steps to manage your setup:

  1. Log in to Westpac Online Banking or the mobile app using your secure credentials.
  2. Navigate to the 'Settings' otab within your home loan account details.
  3. Select the option to 'Link an account' or 'Manage offset' if the feature is available for your product.
  4. Choose the transaction account you wish to use as your offset.
  5. Review the confirmation details and submit the request.

Once submitted, the system updates your interest calculation base, though it may take until the next business day for the change to reflect in your interest summary.

Troubleshooting Common Access Issues

MFA and Login Issues: If you cannot complete the link due to a failed security code, verify that your mobile number is updated in your profile. If codes are not arriving, try toggling your phone’s airplane mode or contact the Westpac support line to reset your digital access.

Browser or App Errors: When the interface becomes unresponsive during setup, clear your browser cache or ensure your mobile app is updated to the latest version via the App Store or Google Play. If the error persists, switching from the app to a desktop browser often bypasses temporary UI glitches.

Locked Account Access: If your account appears locked, this often happens after multiple incorrect password attempts. You will likely need to call Westpac directly or visit a branch with your identification to verify your identity and regain account access.

Pro-Tip: To maximize the interest-saving benefit, ensure your salary is deposited directly into your offset account rather than a standard transaction account. This ensures your funds remain in the offset account for the longest possible duration during the month, potentially lowering your daily interest calculation.

Frequently Asked Questions

Q: Why is my offset account not reducing my loan interest?
This usually happens if the account is not correctly linked or if your loan product does not support an offset feature. For instance, some fixed-rate loans do not allow for offset accounts until the loan reverts to a variable rate. Check your loan statement to confirm the account is marked as an 'offset' rather than a standard savings account, and if it remains unlinked, contact the bank to confirm your product eligibility.

Q: Can I have multiple offset accounts linked to one loan?
Westpac generally allows one transaction account to be linked as an offset for a specific home loan. If you have several savings accounts, you may need to consolidate your funds into that single linked account to receive the full interest benefit. If you need to change which account is used, you can usually swap the link in your online banking settings, though this may take a business day to process.

Official Bank Information

Westpac Bank

Support: 13 20 32

SWIFT Code: WPACAU2S

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
Minimum annual income: 30000 dol Bonus points: Up to 100000 points (75000 in year 1 with 3000 dol spend, 25000 in year 2) Insurance: International travel insurance (up to 3 months), interstate flight inconvenience, and purchase protection Earn rate: 2 points per 1 AUD on international spend and 1,25 points per 1 AUD on everyday categories Interestfree period: Up to 45 days on purchases

Personal debit cards

Show details
Age requirement: Available for users 8 years and older (cards for children aged 813 must be ordered by a parent or guardian) Linked accounts: Can be linked to up to 2 eligible Westpac bank accounts (such as Choice Youth, Students and young adults, or 55+ and Retired) Security feature: Digital card available in the Westpac App with a CVC that dynamically refreshes every 24 hours Parental controls (Under 18): Features include customizable weekly spend limits, kidrated shopping restrictions (blocking adult retailers), and activity notifications for parents Promotional access: Users aged 1834 can unlock up to 5,50% p.a. variable interest on their first 30000 AUD in savings via linked Life Savings and Choice accounts Digital wallets: Compatible with Apple Pay and Google Pay

Personal savings accounts

Show details
Age requirement: 18 years or older Must hold a linked Westpac everyday account (like Westpac Choice) in the same name To earn the 4,65% p.a. bonus interest: You must make at least one deposit each month, ensure your balance is higher at the end of the month than at the start, and never let the balance drop below 0 AUD Promotional offer: Get 50 AUD cashback when you open a new Choice account with an eligible savings account and deposit 50 AUD within 10 days (offer ends 8 June 2026 for new customers)

Personal transaction accounts

Show details
Age requirement: 14 years or older (special conditions apply for those under 14) Residency: Must have a fixed Australian residential address Promotional bonus: 50 AUD cashback when opening a Choice and eligible savings account together (between 1 February 2026 and 8 June 2026) and depositing at least 50 AUD within 10 days New customer rule: Bonus is restricted to those who have not held a Westpac account in the last 2 years Home loan link: Can be utilized as an offset account to reduce interest on eligible Westpac home loans

Loans & Mortgages

Personal Car loans

Show details
Vehicle eligibility: Specifically designed for petrol, diesel, and LPG cars Rate modeling: Comparison rates are calculated based on a standard loan amount of 30000 AUD over a 5year term Personalized pricing: The final interest rate assigned depends heavily on the individual applicant's credit score and profile

Personal Home Loans

Show details
Eligibility: Australian citizens or permanent residents aged 18+ LVR requirement: 80% or less for featured online rates (additional 0,10% discount for LVR up to 70%) Repayments: Principal and Interest (P&I) Online exclusivity: Rates include a lifeofloan discount specifically for new online applications Exclusions: Company and trust borrowers, bridging loans, and construction loans

Personal loans

Show details
Unsecured loan structure with a fixed interest rate Sameday funding available within an hour for existing Westpac transaction account holders Can be utilized for debt consolidation, home renovations, or purchasing a car Signup bonus: 300 AUD cashback energy upgrade offer available for eligible green purchases (e.g., solar, batteries) if the contract is accepted by 23 May 2026

Business Solutions

Business accounts

Show details
Age requirement: 18+ years old Eligibility: Australiabased individuals, sole traders, or companies with one or more directors Account requirement: Must hold an eligible Westpac AUD transaction account to pay telegraphic transfer fees for online outward transfers Available currencies: 12 major currencies (including USD, EUR, GBP) can be opened online, additional currencies require a branch visit Credit facilities: Overdrafts are available on application in eligible foreign currencies

Business car loans

Show details
Minimum loan amount: 15000 AUD Security: The loan is secured by the purchased business vehicle Usage: The vehicle must be fully or mostly used for business purposes Eligibility: Business must be based, registered, and operating in Australia Fast funding criteria (1 business day): Available for new customers borrowing up to 150000 AUD (must own residential property) and existing customers borrowing up to 500000 AUD Fast funding business requirements: Trading for 2 or more years, valid ABN, registered for GST, acceptable credit history, and no outstanding statutory payments Fast funding asset requirements: Vehicle must be 5 years old or less Repayments: Optional balloon payment available at the end of the term to reduce monthly repayment amounts

Business credit cards

Show details
Signup bonus: Up to 150000 Altitude reward bonus points Interest free period: Up to 55 days on purchases Rewards: Earn up to 2 points per 1 AUD spent (uncapped) Eligibility: Minimum 2 years experience in the same or similar business, Australian resident or citizen Perks: Includes complimentary platinum insurances and personal concierge service One additional cardholder at no extra cost

Business loans

Show details
Minimum loan amount: 10000 AUD Approval criteria: Evaluated based on business trading history, income capacity to repay, assets or collateral, and the specific loan purpose Startup eligibility: Tailored financing available for businesses that have operated for less than 2 years Female entrepreneurs fund: Access to an expanded 1000000000 AUD fund specifically designed to back women starting or scaling their businesses

Business savings

Show details
Interest paid monthly or at maturity depending on the specific offer A 0,10% p.a. bonus rate applies when opening or renewing online Account can be used as security for a loan or bank guarantee Joint accounts, trust, or selfmanaged super fund (SMSF) deposits must be opened inbranch

Find bank, branch or ATM

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