Why bills can rise after a smart meter
| Reason | How to check |
|---|---|
| Estimates are over | Earlier bills were marked estimated. Actual reads now show higher, real usage. Look back at the read types. |
| A catch-up bill | The first actual read corrects past low estimates in one bill. See estimated reads. |
| A new tariff | The bill now shows peak and off-peak lines. Check whether you agreed to the change. |
| The season | The meter went in just before winter or summer. Compare kWh a day with the same season last year. |
| Meter exchange errors | The final read on the old meter or the first read on the new one looks wrong. Ask for both readings. |
| Old meter faults | Rarely, an old meter under-recorded. The new meter shows true use. |
Your tariff protection
Under rules the AEMC made in 2024 for the accelerated smart meter rollout in the National Electricity Market, a retailer cannot move you to a time-varying tariff for two years after a smart meter is installed under the rollout, unless you give explicit, informed consent. If your tariff changed without that, raise it with your retailer and, if needed, the ombudsman.
Time of use is not always bad
Some households pay less on time of use, especially those at home during the day or with solar. Our time-of-use guide shows how to tell.
What to do
Compare like with like
Divide kWh by days for this bill and the same season last year.
Check the read types and tariff
Look for estimated reads on earlier bills and any new peak or off-peak lines.
Look at your interval data
Your smart meter's half-hourly data shows exactly when you use power. See reading smart meter data.
Ask questions
Ask your retailer for the old meter's final read and the new meter's first read. If you still doubt the meter, ask for a test.
Escalate
If it is not resolved, contact your energy ombudsman.
Questions about bills after a smart meter
Not by themselves. Bills often rise because estimated bills were too low before, because of a catch-up bill, a tariff change or the season.
For a meter installed under the accelerated rollout, not to a time-varying tariff for two years without your explicit, informed consent, under AEMC rules.
Ask your retailer for a meter test. A fee may apply if the meter is found to be accurate, so check the other causes first.
Yes. Once an actual read is available, the retailer adjusts for the difference on a later bill. If you were undercharged through no fault of yours, recovery is generally limited to the 9 months before you were told.
Usually after the first full billing period of actual reads. Compare kWh a day against the same season last year rather than the first bill alone.
Sources
Every rate on this page comes from the regulator or the regulated retailer. Last checked October 2026. Prices include GST unless we say otherwise.