Ancillary costs statement: allocation keys and checklist.
Allocate ancillary costs with the right allocation key: by floor area, number of flats or consumption. With a checklist for the annual statement and an example structure for a ZEV (self consumption community).
Allocate costs to one unit
This unit is allocated CHF 1’700.00 of CHF 24’000.00 (7,08 %).
Calculation
Example structure of a ZEV statement
Structure only: enter quantities, rates and amounts from your meter data.
| Item | Quantity (kWh) | Rate (CHF/kWh) | Amount (CHF) |
|---|---|---|---|
| Solar power from the roof (internal) | |||
| Grid power (purchased) | |||
| Metering and billing | |||
| Total |
Checklist for the annual statement
Worked example with fictional details
Fictional annual costs of CHF 12,000 are allocated by floor area. The apartment covers 80 m² out of a total of 800 m²: 80 ÷ 800 = 10%. Its share is CHF 1,200. Deducting CHF 1,000 in advance payments leaves a calculated balance payable of CHF 200.
Use the same unit and accounting period for both figures. The calculation does not determine which costs may be charged or which allocation key applies; check the lease and supporting invoices.
Frequently asked questions
The tenancy agreement is decisive. The calculator shows how the same costs are split depending on the allocation key.
A self consumption community: solar power from the roof is used in the building and billed internally. The table shows one possible structure for this statement.
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