If you’ve ever opened your energy bill, glanced at the total, and thought “I don’t know how they’ve worked that out”, you’re not alone.
We regularly speak to residents who feel confused – or even anxious – about their gas and electricity bills. It can be hard to tell whether your bill is correct or if you’re paying more than you should be.
The good news is that once you understand the basics of your energy bill, you’re in a much better position to stay in control, spot problems early and find ways to reduce your costs.
This guide breaks everything down and explains what to look out for.
Why it’s worth checking your energy bill
Your energy bill isn’t just a demand for payment, it’s a useful source of information about how much energy your home uses and how much that energy costs.
By checking your bill regularly, you can:
- Make sure you’re not being overcharged
- Avoid nasty surprises from estimated readings
- Understand where your money is going
- Compare tariffs more confidently
- Spot opportunities to save energy (and money)
Before you can cut your bills, you need to know what you’re using, and your bill tells you exactly that.
Check the billing period first
Before looking at the cost, check the dates your bill covers.
Bills aren’t always monthly, some cover:
- 5–6 weeks
- Several months (especially after estimated bills)
If the period is longer than usual, the bill will naturally look much higher, even if your usage hasn’t changed.
Tip: Compare bills using cost per month or kWh used, not just the total amount.
Energy suppliers aren’t allowed to charge you for energy used more than 12 months ago if the delay was their fault. If you receive a bill covering energy from over a year ago contact your supplier immediately and raise a dispute to the Energy Ombudsman if needed.
Look at the meter readings used
Find the section showing your previous reading and current reading.
Check whether they say:
- Actual (A) – taken from your meter or smart meter or a reading you have submitted.
- Estimated (E) – guessed by the supplier
If your bill is based on estimates, it may not reflect what you’ve really used.
What to do:
If you can safely access your meter, take a reading and submit it to your supplier. This often corrects the bill straight away.
Meter information
Your bill should list:
- Your gas and electricity meter serial numbers
- Meter readings (actual or estimated)
- Your MPAN (electricity) and MPRN (gas) numbers
Make sure the serial numbers on the bill match the meters in your home – otherwise, you could be paying for someone else’s energy.
Understand the unit rate (this is where most of the cost is)
Your bill will show a charge per kilowatt-hour (kWh).
For example:
- Electricity: 28p per kWh
- Gas: 7p per kWh
This is the price of the energy you actually use.
Check:
- If you have Economy 7, are there day and night rates shown?
- Does the unit rate match what you were told when you agreed to the tariff?
Small differences in unit rate can make a big difference over a year.
Don’t ignore the standing charge
The standing charge is a daily cost, even if you use no energy at all.
Typical examples:
- Electricity: around 45-60p per day
- Gas: around 25-35p per day
Over a year, this can add up to hundreds of pounds.
Check how much energy you’ve actually used
Look for the section showing your total usage in kWh.
Compare:
- This bill vs the same time last year
- Winter vs summer usage
Look closely at your tariff
Some bills clearly state:
- When your tariff started
- When it ends
If your fixed tariff has ended, you may have been moved onto a standard variable tariff (your bill will go up and down even if your usage stays the same), which is often more expensive.
Important:
You don’t need to switch suppliers to change tariffs, sometimes a cheaper option is available with your current provider.
Check your payment method and balance
If you pay by Direct Debit, your bill may show:
- Your current balance (in credit or debit)
- A proposed Direct Debit change
If you’re building up a lot of credit, you can ask for a refund or a reduced monthly payment.If you’re falling behind, contact your supplier early, they should offer support options.
Using less energy is one of the simplest ways to save
Once you understand your bill, small changes can make a real difference:
- Turn the thermostat down slightly and wear an extra layer
- Turn lights off when leaving a room
- Take shorter showers
- Use energy-efficient light bulbs
- Avoid leaving appliances on standby
Reducing how much energy your home needs is often the most reliable way to cut bills.
Moving house? Take meter readings
Many billing issues happen when people move home.
To avoid problems:
- Take final meter readings when you leave a property
- Take readings on the day you move into a new home
- Give these readings to the relevant suppliers
You can switch suppliers after you’ve given readings for your new property.
Need help understanding your energy bills?
If you’re struggling to make sense of your bills or you’re worried about high energy costs, you’re not alone.
At Greener Homes in Lancashire, we offer free, impartial advice to help you understand your energy use, explore ways to improve your home’s efficiency and reduce your bills where possible.
Get in touch with us to see how we can help – we’re here to make energy advice clearer, not more complicated.