Electricity meters are extremely reliable, but do rarely get issues.
Maybe to start, just a few things I advise you check . . .
Is your meter an older analogue meter, that needs to be read, or a smart meter ?
If analogue needing reading, are these last 3 bills actual reading bills, or estimated reads ?
With AGL and your old retailer.
I have seen this before at my workshop, which is behind a locked gate most of the time, I had many estimated bills that ALWAYS seem to be way overestimated (I once received a $25,000 bill when my quarterly usage was generally around $300 !).
Since that, I would phone through my readings near end of quarters, and in more recent times regularly send through a meter read via the app, especially near end of each quarter.
Has your usage seemingly gone up, or plan type or tariffs changed drastically on the last 3 bills, compared to the last lower bills ?
Likely your last retailer bills will show similar if you have them or can access them.
(It might be a steep price rise from a previous year's July 1st price increases.)
Yes, your last retailer will be different daily supply and / or tariffs most likely, but you should be able to get a comparison of last usage figures / tariffs with them and see if vastly different to AGL (this should have been checked before switching though).
If usage has increased significantly, check all appliances have not developed a problem, your bill should show any fixed CL items like a HWS, watch usage if using fixed air conds or elec heaters, or use a $20 power point meter to check fridge, freezer, other plug in devices.
I find little difference between most retail suppliers, some charge more for daily supply charge, and a little less tariffs, and others vice versa, sometimes this can make a difference to some types of home usage, but most times it evens out to about the same.
Power prices have risen so sharply in the past few years, often 10% every year, mostly though it is applied from each July 1st when new energy charges are applied by power providers that the AEMC provides (just announced for 2026/2027 in the past few weeks).
Again this year (with very few exceptions), this July will see most consumers in Australia paying about 10% - 11% more.
If all that fails to explain the increases, you can request a meter check, but it will most likely be ok.
You usually pay a fee for the meter company to come out, which if faulty is generally reimbursed.
Good luck with it.
