If you don’t give your energy supplier meter readings, they guess how much you’ve used based on the information about what that property has used in the past.
This is known as estimated readings. Your bill may show ‘estimated’ or ‘E’ in front of the reading to show that it’s based on estimated readings.
Estimated readings can be over or under what you’re actually using, and could lead to problems with billing.
If your energy supplier has underestimated how much energy you’re using, you could end up owing money that you haven’t budgeted for. On the other hand, if your energy supplier has overestimated how much energy you’re using, you could end up paying higher bills than you need to.
To avoid this, take accurate meter readings and provide them to your energy supplier, who should be able to send out an accurate bill.