Energy Desk · Bill change analyzer
Why did my business energy bill change?
Compare two electric or gas bills. Build an exact arithmetic bridge between usage, supply price, demand charges, and the rest of the bill.
Private calculations on this device. Your entered figures are not sent to us.
Previous bill
Current bill
Reconcile the modeled totals to both actual bills before relying on the bridge. Supply usage is changed at the old price first; the price effect then uses current usage, so the components sum exactly to the modeled bill difference. Weather, production, seasonality, tariff eligibility, and individual adjustments are not diagnosed by this arithmetic.
Separate the cost drivers before choosing a response.
Use values from the same two billing statements. The supply price must describe the same scope in both periods. Keep separate demand charges out of supply, and collect all remaining charges and credits into the other-charges field exactly once.
The bridge changes consumption at the previous supply price first, then measures the price change on current consumption. This convention allocates the interaction between price and usage without leaving an unexplained residual. Other valid bridge conventions can allocate that interaction differently.
Check the modeled totals against the actual bills. Unequal billing days, weather, output, occupancy, credits, and tariff changes can all matter. The daily-usage figures give context; they do not weather-normalize usage or establish a billing error.
Full methodology & assumptionsWant help with the account?
A useful review starts with actual bills, matching usage, and the executed contract or complete proposals. You choose what to share.
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