FREE CALCULATOR · NO SIGN-UP

Price change planner

What if your unit rate rose or fell? Enter the energy you expect to use over the next 90 days and test a percentage change to see the difference in pounds.

Example inputs are editable and are not your tariff. Use one fuel at a time, with usage from the same season on past bills and VAT-inclusive rates. For a seasonal usage estimate, try the seasonal usage planner →

90-day scenario cost£379.00

At today’s rate: £347.00 · Increase of £32.00

How it works

Today: 90-day usage × current unit rate, plus 90 × the daily standing charge.

Scenario: the same usage at the unit rate changed by your percentage, plus the unchanged standing charge. The difference between the two is the effect of your scenario.

The change applies for all 90 days. Weather, occupancy and other usage changes are not modelled, and nothing here predicts future prices.

Questions

Is this a price forecast?

No. You choose the percentage change. The planner shows what that scenario would mean for your usage; it does not predict what will happen to prices.

Why doesn’t the standing charge change?

The scenario changes the unit rate only. Real price changes can move standing charges too: enter a different standing charge to test that as well.

What usage should I enter?

Use your usage for the same 90 days on a past bill if you have it, because heating makes winter usage much higher than summer usage. The seasonal usage planner can estimate a three-month share from your annual usage.

Can I plan electricity and gas together?

Run the planner once for each fuel, because each has its own unit rate and standing charge, then add the two results.