This is a bit of a heads up for those who aren't aware of the M5 Cashback scheme.

A heap of people I've talked to recently haven't been aware of it.

It essentially means that the toll for any private trip in a private/pensioner/charity registered vehicle can be claimed back, minus GST. You will still need to manually submit a cashback claim every three months, in order to confirm that each trip on the M5 that is associated with your E-tag account was done in a private vehicle (the RMS occasionally audits this by taking photos of cars using the M5).

To get the cashback, you need to register for the M5 cashback scheme with one of these E-tag providers, which can usually be done through their online portals by clicking a check box.

After registering, you can use the M5 and claim your tolls back after each quarter (after the end of March, June, September, December) online through the tag provider's portal.

If you found that you've already registered for the M5 cashback when signing up for your toll account, you can claim for up to 12 months of trips.