To read your electricity meter, find the row of digits on its front, read them from left to right, and ignore any numbers shown in red or set apart after a decimal point. That figure is your cumulative consumption in kilowatt-hours (kWh) — the total electricity used since the meter was installed. Your bill is calculated from the difference between two such readings, so the single most powerful thing you can do to catch a billing error is to take your own reading and compare it against the figure your supplier has used. If the two do not match, the bill is almost certainly wrong.
Your supplier does not usually watch your meter directly. Instead, they bill you on the difference between a start reading and an end reading over a period, multiply that by your unit rate, and add a fixed daily standing charge. Because the whole bill rests on those two numbers, an incorrect reading — whether misread, mistyped, or simply estimated — flows straight through into the amount you are charged. Understanding the reading is therefore the foundation of understanding the bill.
Before reading the meter, work out which type you have, because the method differs slightly for each:
For a digital meter, write down the numbers from left to right. Ignore any digit that is red, or that appears after a decimal point — these are fractions of a unit and are not used for billing. For a smart meter, press the button (often marked "A" or with an arrow) until the display cycles to the total consumption figure; different suppliers label this differently, but you are looking for the cumulative kWh reading. For a two-rate meter, note both rows and keep them clearly labelled so you do not swap them. For a dial meter, read each dial in turn from left to right; where a pointer sits between two numbers, record the lower number, and where it sits directly on a number, check the dial to its right — if that dial has not yet passed zero, record the lower number on the dial you are reading.
A typical electricity bill has two moving parts. The first is your consumption charge: the units used (the difference between this reading and the last) multiplied by your unit rate. The second is the standing charge: a fixed daily amount you pay regardless of how much electricity you use, covering the cost of maintaining your connection to the network. VAT is then added. Knowing this structure tells you exactly where to look when a bill seems too high — either the units are wrong, the rate is wrong, or the standing charge has been applied incorrectly.
Most billing errors fall into a small number of recognisable patterns. Check for each of these:
Take a clear, dated photograph of the meter showing the reading, then submit that reading to your supplier and ask them to reissue the bill. Keep your own record of readings over time so you can demonstrate your true consumption. If the supplier disputes a genuine discrepancy and you cannot resolve it, raise a formal complaint; energy suppliers are required to have a complaints procedure, and unresolved disputes can ultimately be escalated to the relevant energy ombudsman.
Do I still need to read my meter if I have a smart meter? Not for routine billing, because a smart meter sends readings automatically. It is still worth reading it directly from time to time, however, to confirm that the automatic readings agree with what the meter physically shows. If they diverge, you have found a fault worth reporting.
What do the red digits on my meter mean? The red digits — or any numbers after a decimal point — represent fractions of a kilowatt-hour. They are not used to calculate your bill, so you should ignore them and record only the main black or white digits.
Why is my bill high even though my reading looks normal? If your own reading matches the bill, the units are probably correct and the cause lies elsewhere: an incorrect unit rate, being placed on the wrong tariff, or the standing charge. Check the rates printed on the bill against your agreed tariff, since a high bill built on accurate readings usually points to a pricing error rather than a metering one.
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