Electricity Running Cost Guide

This guide helps homeowners plan for estimating appliance and household electricity use from watts, hours and tariff rates. The aim is to understand the work, prepare useful information and compare written quotations on a like-for-like basis.

What the project usually includes

The exact scope depends on the property and contractor, but a complete quotation should make the main work visible rather than hiding it inside one total.

• Device or system power input
• Hours of operation
• Electricity rate per kWh
• A clearly defined daily, monthly or annual usage period

Costs that are often quoted separately

These items are common reasons an initial figure grows after a site visit or after work begins. Ask how each will be handled before accepting a quote.

• Standing charges
• Demand charges where applicable
• Taxes and fees not included in the entered rate
• Variable-rate or time-of-use pricing

What usually changes the final price?

Project cost is rarely determined by one national average. The biggest movements usually come from measurable quantity, specification, existing condition, access and local labour or regulatory requirements.

• Device power draw
• Hours of use
• Electricity tariff
• Standby consumption
• Seasonal use
• Number of devices

How to prepare before requesting quotes

• Use rated wattage or measured energy use
• Use your actual tariff rather than a national average
• Separate devices with different schedules
• Recalculate when tariffs or usage change

Questions to ask the contractor

• Use the rated wattage as a starting point
• Use a plug-in meter when accurate consumption matters
• Include taxes or standing charges separately if relevant
• Compare like-for-like usage periods

USA and UK context

U.S. electricity tariffs vary by utility, state and plan. UK household rates and standing charges vary by region, payment method and tariff; Ofgem publishes current cap information for default tariffs.

How to compare two quotes fairly

1. Check that both quotes cover the same measured area or quantity.
2. Compare product or material specification, not only brand names.
3. Mark what is excluded: removal, disposal, access, permits, testing and making-good.
4. Identify allowances and provisional sums that can change later.
5. Compare warranty, schedule and payment terms after the scope matches.

Use estimates as a planning range

Once you have comparable real quotations, use the Repair Budget Planner to apply a contingency to the low and high ends. The result is a budgeting range, not a contractor guarantee.

Frequently asked questions