Can I Claim Electricity Bill as a Business Expense?
Yes - you can claim a proportion based on business use if you work from home.
What HMRC Says
A proportion of household electricity used for business purposes is allowable. For dedicated business premises, 100% is claimable.
When You Can Claim
- Proportion of home electricity for home office
- 100% of electricity for dedicated business premises
- Electric vehicle charging for business mileage
When You Cannot Claim
- 100% of home electricity if mixed use
- Electricity for personal areas of home
- EV charging for personal trips
Good to Know
How to calculate: Calculate using room-based or hours-based method, or use £6/week flat rate instead
Understanding Electricity Bill Expenses
For directors who work from home, claiming a proportion of electricity costs is a legitimate and often under-claimed business expense. The approach you take determines how much you can claim, and you have two methods: the simplified flat rate or the actual cost proportional method.
The simplified method allows your company to pay you £6 per week (£312 per year) tax-free for working from home. This covers all household running costs including electricity, gas, water, and heating, and requires no receipts, calculations, or record-keeping. It is straightforward but often produces a lower claim than the actual cost method, particularly if you have high energy bills or use a significant portion of your home for business.
The proportional method calculates your actual business use of electricity. There are two common approaches: the room-based method divides your home by the number of rooms (excluding bathrooms and kitchens typically) and claims the proportion of rooms used for business. If you have a dedicated office in a 5-room home, you would claim 20% of electricity. The time-based method considers the hours your office is in use relative to the total hours the home is occupied. Many accountants use a blended approach.
For companies with dedicated business premises such as a rented office, workshop, or retail space, 100% of the electricity bill for those premises is deductible. There is no apportionment needed. Simply ensure the bill is in the company name or the company reimburses the cost.
Electric vehicle charging at home adds a layer of complexity. If you charge a company electric vehicle at home, the cost of the electricity used for business mileage is an allowable expense. HMRC's advisory electricity rate for fully electric company cars is 7p per mile (2025/26). Your company can reimburse you at this rate for business miles driven on home-charged electricity. For a dedicated home charge point, you can also claim the actual cost of business charging based on metered usage or a reasonable estimate.
VAT on domestic electricity is charged at the reduced rate of 5%, not the standard 20%. This means VAT recovery on home electricity claims is limited. For business premises, electricity may be charged at 20% VAT depending on usage levels, and this is fully recoverable.
Real-World Examples
Home office using the flat rate
Jenny works from her spare bedroom 4 days a week. Rather than calculating her actual electricity use, her company pays her the HMRC flat rate of £6 per week, totalling £312 per year. She receives this tax-free with no receipts needed.
Home office using the actual cost method
Chris has an annual electricity bill of £2,400. He uses one room out of five as a dedicated office and works from home 5 days a week. His accountant calculates a 20% business proportion, allowing a claim of £480 per year, which is higher than the £312 flat rate.
Dedicated business premises
A bakery pays £350 per month for electricity at its commercial kitchen. The entire £4,200 annual cost is deductible as a business expense since the premises are used exclusively for business. The company reclaims VAT on the bills.
EV charging at home
Sarah charges her company Tesla at home and drives 8,000 business miles per year. Her company reimburses her at the HMRC advisory rate of 7p per mile, totalling £560 per year tax-free, which covers the electricity cost.
Common Mistakes to Avoid
- Claiming 100% of home electricity when you work from home but the property is primarily a residence with mixed personal and business use.
- Using both the flat rate (£6/week) and the proportional method simultaneously - you must choose one approach for all household running costs.
- Forgetting to increase your claim when energy prices rise - the proportional method tracks actual costs, so higher bills mean a higher claim.
- Not keeping utility bills as evidence when using the proportional method, which is required to substantiate the calculation during an HMRC enquiry.
Frequently Asked Questions
Should I use the flat rate or calculate actual electricity costs?
Calculate both and use whichever gives the higher claim. The flat rate of £312 per year is simpler but usually lower. If your electricity bill is over £1,500 per year and you use at least one room as a dedicated office, the proportional method almost always gives more.
Can I claim electricity if I work from home only some days?
Yes, but the proportional method should reflect your actual usage pattern. If you work from home 3 days out of 5, reduce the time-based proportion accordingly. The flat rate can still be claimed if you regularly work from home, even if not every day.
Does claiming home electricity affect Capital Gains Tax on my home?
Claiming a proportion of running costs like electricity does not normally affect your principal private residence CGT relief. The risk arises primarily when you claim mortgage interest or have a room used exclusively for business. Running costs alone are generally safe.
Can I claim electricity for charging business devices at home?
The electricity to charge laptops, phones, and other business devices is minimal and typically covered by the flat rate. If you use the proportional method, it is already included in your office room calculation. There is no need to calculate device-specific charging costs separately.
Source: HMRC Employment Income Manual EIM01472 - Working from home, and BIM47820 - Use of home
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