For a facilities manager overseeing a secondary retail asset, the monthly energy bill is a background item: checked against budget, filed, moved on. When an estimated bill arrives, it is easy to assume the estimate is reasonable. Suppliers use historic consumption to model them. How far wrong can they be?

In this case, quite far. What looked like a routine bill was actually overstating consumption materially. This is one of the reasons independent metered visibility matters so much once occupancy, usage patterns or tenancy mix change.

When Monitor Hut was connected to the site’s electricity supply, the platform established a baseline within the first billing cycle. A discrepancy surfaced immediately. The supplier’s most recent invoice, marked as estimated, was billing for 11,400 kWh. The platform’s daily metered data for the same period showed actual consumption of 6,820 kWh.

The 4,580 kWh gap was not a fault or an anomaly. It was the accumulated effect of seven months of estimated billing during which the building’s consumption had dropped materially following a major tenant vacation and a partial re-let at lower occupancy. The supplier’s estimate had remained anchored to the previous tenancy’s consumption profile and had not been updated.

The metered data provided the evidence needed to open a formal billing dispute. Seven months of estimates were reconciled against actual consumption and a credit of £1,830 was applied to the account.

That matters because estimated bills can be inaccurate, and a current meter reading is the starting point for getting them corrected. Citizens Advice specifically advises that if an estimated bill is too high, you should take a meter reading and send it to your supplier so they can issue an updated bill. :contentReference[oaicite:0]{index=0}

Explore more examples in our Data Stories, or see how connected data supports compliance and reporting workflows.

If a bill is estimated, supplier assumptions can lag behind real occupancy and usage changes. Citizens Advice notes that estimated bills can be inaccurate and advises customers to provide a current meter reading so the supplier can send an updated, accurate bill.

The difference here is that the site already had independent, continuous metered data available to support the challenge immediately.