VAT for Electricians: What to Charge and How to Invoice

VAT is where a lot of solo electricians start to feel out of their depth — and understandably, because the rate you charge is not always the standard 20%. This guide covers when you have to register, what to charge on labour versus materials, when the reduced and zero rates apply, and exactly what has to appear on a VAT invoice so it stands up if HMRC ever looks.

When do you have to register for VAT?

You must register for VAT once your taxable turnover goes over the registration threshold in any rolling 12-month period — or if you expect to cross it in the next 30 days alone. As of the 2024/25 tax year that threshold is 90,000 pounds, but this figure has changed before, so treat it as "currently around 90k" and check the current HMRC figure before you rely on it.

Two things worth knowing: the threshold is about turnover, not profit, and it is a rolling 12-month test — not your accounting year. You can also register voluntarily below the threshold, which can make sense if most of your customers are VAT-registered businesses who reclaim it, or if you want to recover VAT on tools, a van and materials.

The standard rate: 20%

Most general electrical work for domestic and commercial customers is standard-rated at 20%. New consumer unit, adding sockets, fault-finding, rewires on an existing property, commercial fit-outs, maintenance — if none of the special reliefs below apply, you charge 20% on the whole job, labour and materials alike.

VAT on labour vs materials

A common myth is that VAT only applies to materials. It does not. Once you are VAT-registered, VAT applies to your labour as well as your materials — the whole supply. The exception is where a reduced or zero rate applies to the type of work, in which case that lower rate can cover both the labour and the qualifying materials you install as part of it.

The reduced rate: 5%

Some work qualifies for a reduced rate of 5%. For electricians the relevant categories tend to be:

• The installation of certain energy-saving materials in residential properties — the qualifying list and the conditions change over time, so confirm what currently qualifies before quoting at 5%
• Certain electrical work carried out as part of a qualifying residential conversion (for example converting a property into a different number of dwellings)
• Certain work on a dwelling that has been empty for two years or more before the work starts

The rules here are genuinely fiddly — whether a job qualifies can depend on the property, the customer and what evidence you hold. Do not assume 5%; check the current HMRC notice or ask your accountant, because getting it wrong means either overcharging your customer or under-declaring to HMRC.

When 0% applies

A smaller set of work is zero-rated (0%). The most common case an electrician meets is electrical work supplied as part of the construction of a new-build dwelling — first-fix and second-fix on a genuinely new home is typically zero-rated. Zero-rated is not the same as exempt: you still record it as a VAT sale at 0%, and you can still reclaim the VAT on your related costs, which is why it is a favourable rate to be on.

The VAT Flat Rate Scheme

The Flat Rate Scheme is an optional simplification for smaller businesses. Instead of tracking VAT on every purchase, you pay HMRC a fixed percentage of your VAT-inclusive turnover and generally cannot reclaim VAT on most purchases. It cuts paperwork and can occasionally save money, but for a trade that buys a lot of materials it often works out worse than standard VAT accounting because you lose the input VAT on those materials. There is also a "limited cost business" rule that pushes many low-materials businesses onto a higher flat rate. Run the numbers both ways — or have your accountant do it — before opting in.

What a VAT invoice must show

Once registered, your invoices become VAT invoices and have to carry specific information. A valid VAT invoice generally needs:

1. A unique, sequential invoice number
2. Your business name, address and VAT registration number
3. The invoice date (and the tax point / date of supply if different)
4. The customer's name and address
5. A description of the work and goods supplied
6. The rate of VAT for each line and the amount excluding VAT
7. The total amount excluding VAT, the total VAT charged, and the gross total

If you invoice contractors under the Construction Industry Scheme, remember VAT and CIS interact: CIS is deducted from labour and calculated before VAT, not on the VAT itself — the CIS deductions guide walks through the numbers. And if you are doing VAT-registered, CIS-registered work for another business, you may also fall under the domestic reverse charge, which changes the invoice again.

Good invoicing software handles the VAT lines, rates and running total for you so you are not doing this by hand on a van seat — the same care you put into how you write a quote should carry through to the invoice.

The bottom line

Watch your rolling 12-month turnover against the current threshold, default to 20% unless a specific 5% or 0% relief clearly fits, remember VAT applies to labour as well as materials, and make sure every invoice carries your VAT number and the full breakdown. Get those right and VAT is just another line on the invoice rather than a source of stress.