How to Read Your Electricity Bill (and Cut It)

Most people glance at the total on their electricity bill and pay it. But the bill is made of a few simple parts, and once you understand them you can see exactly where your money goes — and where to cut it.

The parts of your bill

1. The unit rate (per kWh)

This is the price you pay for each kilowatt-hour of electricity you use. It is the part you have the most control over, because it is multiplied by your usage. A home using 600 kWh a month at $0.17/kWh spends about $102 on energy alone.

2. The standing (fixed) charge

A flat daily or monthly fee just for being connected, regardless of usage. You cannot reduce it through saving energy — only by switching tariffs or suppliers.

3. Taxes and levies

A percentage added on top, covering sales tax, environmental levies and similar. It scales with the rest of the bill, so cutting usage shrinks this too.

You can see how these combine — and test a different tariff — with our electricity bill calculator.

Find your biggest energy users

Roughly speaking, anything that makes heat or cold dominates a bill: heating, air conditioning, water heating, ovens, kettles and tumble dryers. Always-on devices like fridges and routers cost less per hour but run 24/7, so they add up.

To see what any single device costs, enter its wattage into the appliance running cost calculator. It is often surprising — a 1,500 W space heater run for five hours a day can cost more per month than your fridge does all year.

The highest-impact ways to cut your bill

• Tackle heating and cooling first. Turning a heating thermostat down even 1–2 degrees can save a few percent — try the thermostat savings calculator.
• Switch all lighting to LED. LEDs use 80–90% less power than old bulbs; the LED savings calculator shows the payback, usually under a year.
• Cut water heating. Shorter showers and a slightly lower tank temperature add up — see the water heating cost calculator.
• Improve insulation. Stops you paying to heat or cool air that escapes; the insulation savings calculator estimates the return.
• Shift usage to off-peak if you have time-of-use pricing — run dishwashers, laundry and EV charging when power is cheapest.

Check the meter, not just the bill

If your bill looks wrong, compare its kWh figure against your own meter readings. Estimated bills are common and can be too high. Reading your meter monthly also makes it obvious when something — a faulty appliance, a new device — has pushed usage up.

The bottom line

Your bill is just usage × rate, plus a fixed charge and tax. Lower the usage on your biggest energy users, make sure you are on a competitive tariff, and the total falls. Use the calculators above to put real numbers on each change before you make it.