A New Electricity Tariff Changes Vending Costs: Recalculate Without Guessing Usage

A change in electricity tariff can alter vending running costs even when the machine uses exactly the same amount of energy. Recalculate the price effect separately from consumption so the budget does not imply that the equipment suddenly became more or less efficient.

Use the actual tariff documents and a clearly identified consumption basis. If you do not yet have a suitable measurement, label the estimate rather than creating a machine-specific figure from the whole building bill. A transparent calculation is more useful than a precise total built on an untested assumption.

Establish the energy quantity first

Identify whether the consumption figure comes from the relevant product information, a supplier estimate or a dedicated site measurement. Record the period and configuration. An annual figure cannot be compared directly with one month’s usage without making the time basis clear.

The European Commission’s commercial refrigeration guidance explains annual energy consumption in kWh on applicable labels. Such information can support a comparison, but it should not be presented as a measurement of your particular installation. Actual operation and the evidence source still need to be distinguished.

Do not substitute a maximum wattage figure for measured annual energy. Maximum power and accumulated consumption answer different questions. If the evidence is insufficient, ask the supplier or facilities team how to obtain a suitable basis instead of assuming continuous operation at the maximum rating.

Isolate the unit-rate change

For a simple illustration, suppose the chosen annual energy assumption is 1,000 kWh. At an illustrative rate of €0.30 per kWh, the energy component is €300. At €0.36 per kWh, it is €360. The difference is €60 under the same consumption assumption.

These are hypothetical figures, not an Irish market tariff, a supplier quote or a specification for a machine. Their purpose is to show the method: multiply the unchanged energy quantity by each comparable rate, then calculate the difference. Keep the tax basis and other inclusions consistent.

If a contract has different time bands, one blended rate may not describe it adequately. Ask the person managing the electricity account how to apply the available usage information. Do not assign all consumption to the cheapest band merely because the machine is accessible during those hours.

Keep other charges and changes separate

Identify standing charges and other contract components without automatically allocating the entire building’s fixed bill to vending. Use the business’s agreed allocation method where relevant. A cost that would exist without the machine should not silently become a machine-specific incremental cost.

Also record operational changes during the comparison period. New opening hours, a different machine configuration or an interruption can affect the meaning of the consumption data. If both usage and rate changed, calculate or discuss those effects separately instead of attributing the whole bill movement to the tariff.

A simple sensitivity table can show low, central and high consumption assumptions using the same new rate. Label the scenarios and explain the evidence behind them. Avoid presenting an arbitrary range as a verified forecast merely because it appears in a spreadsheet.

Update the budget and review date

Carry the revised energy component into the broader vending cost plan while leaving unrelated costs unchanged unless there is evidence to revise them. Record when the new tariff takes effect and whether the first comparison period spans both old and new rates.

Set a review after an appropriate period of actual operation. Compare the available consumption evidence with the assumption and explain any material difference. This creates a useful budgeting cycle without making unsupported claims about future savings or treating a tariff movement as a change in equipment performance.

Related guidance: Comparing Vending Sales: Use the Same Opening Hours.

Planning or reviewing vending at your site? Contact the team with your location, equipment details and the question you would like to resolve.