Check a billWhat is unit rate on a UK energy bill?
The unit rate is the price you pay for each unit of energy used, usually shown as p/kWh. It is the variable part of the bill. Most fast bill checks become much easier once you separate this from the standing charge.
How unit rate works
If your bill says 300 kWh and 25p/kWh, the variable usage cost is 300 × 25p = 7,500p, or £75. That is the core usage calculation people should learn first.
Once you have that subtotal, you add standing charge separately and then check whether anything else on the bill is an account adjustment rather than energy use.
Related guides
Where people get confused
- They compare the unit rate to the total bill instead of to the usage line.
- They forget the standing charge.
- They ignore a second unit rate in the same bill.
- They argue about tariffs when the real problem is a wrong reading or estimated statement.
Official and reference sources
Frequently asked questions
Is unit rate the same as standing charge?
No. Unit rate is the variable price for energy used. Standing charge is a fixed daily cost.
Why do I sometimes see more than one unit rate?
The bill may cover a tariff change or a multi-rate setup such as day and night rates.
Can a supplier charge a different unit rate by region?
Yes. Region and payment method can affect the cap-level comparison context.