2% surcharge for PayPal & card payments.
Microsoft says, "As of April 03,2023, the subscription fee for Microsoft 365 Family will change from AUD 129 to AUD 139 to address changing market conditions."
I couldn't find a better deal than this one.
Microsoft 365 Family 6 Users 1 Year digital license. Delivery by email with no shipping cost. Australian license is suitable for new subscription or renewal of your existing subscription.
Excerpt from previous postings by BJReplay:
Digital license delivery by email. Download from www.office.com/setup. This is an Australian license.
Please be aware that digital license is a non-returnable item to security reason. This does not limit your rights under the ACL.
Stackable up to five years.
If you are going to stack, you can stack up to five years total.
If you have an existing subscription, that means you can buy up to four more, not five more.
There is a long discussion here on OzBargain on how to do this, including downgrading your existing family subscription, adding three personal subscriptions(saveonit.com.au) and then upgrading to family at the last step.
Don't forget that they offer you 1 month free if you sign up to autorenew. If you accept that one month, you can only stack 4 codes, not 5.
Buy N-1 single user licenses, then 1 family to get N years of family.