Estimated readings are based on the historical usage of your meter. This means using meter readings you've given in the past (either to us or to previous suppliers) to work out how much energy you're likely to use in future.
If we haven’t received a meter reading from you for a while, your estimates may not be accurate. A reading at least every three months would be ideal to keep things shipshape.
If the estimate on your statement is a little higher than expected, don’t worry. Simply log in to your Bulb Account and submit your meter readings. If your readings are lower than our estimates, we’ll pay you back the difference on your next statement.