Start with the billing period
Compare bills using the actual number of days. Divide the combined dollar amount by billing days for an average daily cost, then multiply by about 30.4 for a normalized monthly estimate. This prevents a 35-day bill from looking unusually high beside a 28-day bill simply because it covers an extra week.
Usage is more informative than the total
- Electricity: compare kilowatt-hours and, where relevant, time-of-use, ultra-low overnight, or tiered usage.
- Natural gas: compare cubic metres and heating degree conditions across the same season.
- Water: compare cubic metres, meter readings, and the municipal billing period.
The Ontario Energy Board notes that an electricity bill includes the electricity used, delivery, regulatory charges, and other applicable items. Some delivery charges are fixed, so the bill will not fall to zero when usage falls. Delivery rates can also vary between utility service areas.
Use the same season
Heating and cooling can dominate a household comparison. Compare January with the previous January before comparing January with May. Note changes in occupancy, working from home, electric-vehicle charging, appliance use, thermostat settings, renovations, and heating fuel.
A universal Ontario "typical bill" is not dependable across apartments, detached homes, municipalities, utility territories, heating systems, and seasons. A low/typical/high flag based only on dollars per person is a rough screening prompt, not a benchmark.
When a bill jumps, check in this order
- Confirm the start date, end date, and whether the reading was actual or estimated.
- Compare usage units with the same season last year.
- Separate fixed, delivery, commodity, regulatory, tax, rebate, and adjustment lines.
- Look for a rate-plan, contract, or municipal-rate change.
- Check for water leaks, running toilets, HVAC faults, electric auxiliary heat, or unusual appliance use.
- Contact the utility when the meter reading or charge still cannot be explained.
Compare household context carefully
Cost per person can help one household track its own changes, but children and adults do not use identical amounts and home size still matters. Square footage alone also misses insulation, exposure, age, equipment efficiency, and whether heating and hot water are included in another bill.