Self-employed electricians are some of the busiest tradespeople in the UK — and some of the most financially exposed when it comes to tax. Between CIS deductions on site work, the VAT threshold creeping up on busy contractors, and the sheer volume of cash and bank-transfer payments that flow through a busy electrical business, there’s a lot that can go wrong if it’s not managed properly.
At Hayes Chartered Certified Accountants and Tax Consultants, we work with electricians and electrical contractors across London and the UK — sole traders doing domestic work, contractors on commercial sites, and small electrical businesses employing apprentices or other sparks. We know the industry and we know the tax rules that apply to it.
Most electricians working on construction projects — new builds, commercial fit-outs, refurbishments — will be working within the Construction Industry Scheme (CIS). As a subcontractor, the main contractor deducts 20% (or 30% if you’re not properly registered) from your labour payments and sends it to HMRC on your behalf.
Those deductions are not your final tax — they’re advance payments. At the end of the tax year, when you file your Self Assessment return, all CIS deductions made during the year are offset against your total tax liability. If the deductions exceed your liability, HMRC refunds the difference.
Many electricians don’t realise they may be owed a CIS refund year after year — particularly if they’ve been deducted at 20% consistently but have significant allowable business expenses that reduce their taxable profit. We check this for every electrician client.
If you take on subcontractors yourself, you’re a CIS contractor too — with monthly return obligations, verification requirements, and penalties for late filing that apply whether or not you remember to submit.
Regardless of CIS, self-employed electricians need to file a Self Assessment return each year. This covers all electrical income — site work, domestic work, commercial, and private jobs — minus allowable business expenses, giving your taxable profit.
The expenses available to electricians are typically significant and include:
Getting all of these correctly captured and evidenced is what turns a rough tax return into an accurate, optimised one.
If you’ve taken on an apprentice or employed other electricians, you’re an employer. PAYE, employer NICs, auto-enrolment pension duties, and the apprenticeship levy (above certain payroll thresholds) all apply. We set up and manage payroll for electrical business clients and ensure all employer filings stay on time.
CIS applies to your site-based construction work. Your private domestic work sits outside CIS and is simply declared as self-employed income on your Self Assessment return. Both types of work need to be included — CIS deductions from site work are credited against the overall liability.
Yes. A van used exclusively for business can be claimed via capital allowances (Annual Investment Allowance for the purchase cost) or via the HMRC flat-rate mileage allowance. We calculate which gives a better result for your specific vehicle and usage pattern.
Contact us as soon as possible — ideally before you cross £90,000 in any rolling 12-month period. There are pricing and cash flow decisions that are easier to make before registration than after. We advise on timing and practical management of the transition.
Yes. Professional registration fees required to carry on your trade — NICEIC, NAPIT, ELECSA — are an allowable business expense.
CPD and training that updates your skills in your existing trade — such as the EV charging qualification — is generally an allowable expense. Training that moves you into a completely new trade is treated differently. We advise on each case.
There are a lot of ways you can contact Hayes Chartered Certified Accountants and Tax Consultants in London(HCCA),
Call : 0208646 0800
WhatsApp : 07429584191
Email : info@hayes-accountants.co.uk
Submit your query here : Form
or for more details : Contact Us
Stop juggling your finances alone. Hayes Chartered Certified Accountants and Tax Consultants offers everything a business or individual needs under one roof — Bookkeeping, VAT returns, payroll, self-assessment tax returns, pension auto enrolment, year end accounts, corporation tax, capital gains tax, CIS tax returns, tax rebates, landlord taxation, management accounts, cash flow management, budgeting and forecasting, tax advisory, company formation, registered address, company secretarial services, and Making Tax Digital (MTD) compliance. One team. Every service. Zero hidden fees.
Book your free consultation today and find out how much we could save you.
