Gas bills follow a simple formula, making calculation straightforward.
The first step in being able to take control of your finances is knowing how much you can expect to have to pay out in household bills. When it comes to gas and electricity bills, this involves a little bit of number crunching but the results are worth the effort. Being able to calculate your British Gas bill can mean the difference between planning for the future and getting a nasty shock when the bill arrives.
You Will Need
- Pen and paper
- Electricity meter readings
- Gas meter readings
- Previous British Gas bill
How to Calculate Your Gas Bill
- Note down the current reading on your electricity meter. The figures you require are the large set of numbers, usually behind a clear plastic panel.
- Ignore any figures either marked in red or to the right of a decimal point; depending on your model of electricity meter.
- Subtract the previous set of electricity meter figures recorded on your last British Gas bill.
- Note down the current reading on your gas meter.
- Again, ignore any figures in red or to the right of a decimal point. The figures you require are large, black and often behind a clear plastic panel.
- Subtract the previous gas meter reading figures on your last British Gas bill.
- Note the unit rates on your previous bill.
- If you used over 125 kWh of electricity, multiply 125 by your tier 1 electricity unit rate and the remaining kWh by the tier 2 rate.
- The sum of the two is your electricity bill.
- If you used over 670 kWh of gas, multiply 670 by your tier 1 gas unit rate and multiply the remainder by the tier 2 rate.
- The sum is your gas bill.
If you regularly calculate your bills to keep on top of your finances, consider creating a spreadsheet to do the calculations for you. This way you can simply enter your current meter readings and the computer will be able to do all the number crunching on your behalf.
Some tariffs vary the amount of gas and electricity charged at the higher unit 1 rate depending on the time of year. This will have an effect on the size of your quarterly bill compared with your estimates. Check the terms of your contract to see if you are on a tariff of this sort.