How to Start an Electrician Business in the UK

Electrical work is one of the most regulated trades in the UK — and for good reason. If you have the qualifications and experience, starting your own electrical business offers excellent earning potential and steady demand. This guide covers everything from compliance to keeping your books in order.

Qualifications and Competence

Unlike many trades, electrical work has specific legal requirements:

• NVQ Level 3 in Electrical Installation (or equivalent) — the standard industry qualification
• City & Guilds 2382 (18th Edition IET Wiring Regulations) — essential. You must understand and work to BS 7671.
• City & Guilds 2391 (Inspection and Testing) — required if you inspect and certify electrical installations
• AM2 Assessment — the practical assessment for the JIB (Joint Industry Board) ECS card
• ECS card — the industry competence card for electricians, widely required on construction sites

Part P Compliance

In England and Wales, most electrical work in domestic properties must comply with Part P of the Building Regulations. You can either:

1. Join a competent person scheme — such as NICEIC, NAPIT, ELECSA, or Stroma. This allows you to self-certify your work without involving building control. Annual membership costs £300–£800.
2. Notify building control — for each job. This adds cost and delay, so joining a scheme is far more practical.

Joining a competent person scheme is effectively essential for any electrician working on domestic properties.

Sole Trader or Limited Company?

Most electricians start as sole traders. Register with HMRC, keep records, and file a Self Assessment return each year.

If you work as a subcontractor on construction sites, CIS applies. A limited company may become more tax-efficient at higher profit levels (above £40,000–£50,000) and provides limited liability.

Registering with HMRC

Register for Self Assessment within three months. You will receive a UTR by post.

CIS

If you subcontract for other businesses in construction, register with CIS. Deductions are 20% (registered) or 30% (unregistered) on the labour portion of payments.

VAT

Register when turnover exceeds £90,000. The domestic reverse charge applies to electrical work supplied to VAT-registered, CIS-registered contractors.

Insurance

• Public liability insurance — essential. £2–5 million minimum for most contracts.
• Professional indemnity — covers errors in your design or certification work
• Employers' liability — legally required if you employ anyone
• Tools insurance — electrical test equipment is expensive
• Vehicle insurance — commercial cover for your van
• Personal accident — covers income loss from injury

Expect to pay £500–£1,500 per year for comprehensive cover.

Claimable Expenses

• Test equipment — multifunction testers, insulation resistance testers, earth loop impedance testers
• Tools — hand tools, power tools, cable cutters, crimping tools
• Materials and consumables — cable, trunking, switches, sockets, consumer units
• Vehicle costs — fuel, insurance, maintenance, or 45p per mile
• Competent person scheme fees — NICEIC, NAPIT, etc.
• Insurance premiums
• Training and qualifications — 18th Edition updates, inspection and testing courses
• ECS card fees
• PPE and workwear — safety boots, hi-vis, hard hat, gloves
• Phone and communications
• Marketing — van livery, website, local advertising
• Home office costs — for admin and paperwork
• Waste disposal — old wiring, packaging
• Accountancy fees

Accounted tracks all your expenses automatically. Snap receipts on site and everything is matched to your bank transactions.

Industry-Specific Tax Considerations

CIS Deductions

CIS deductions are not an extra tax — they are advance payments against your Income Tax and NI. Keep every deduction statement and ensure they are offset when you file your Self Assessment.

Separate labour and materials on every invoice. CIS deductions only apply to labour.

Capital Allowances

Test equipment is expensive but qualifies for Annual Investment Allowance — deduct the full cost in the year of purchase.

Flat Rate VAT

If VAT-registered, the flat rate for electrical services is typically 9.5% (manufacturing/trade) or 14.5% (general building). Check which category your work falls into.

Renewable Energy Work

If you install solar panels, EV chargers, or battery storage, some of this work may qualify for the reduced 0% VAT rate on energy-saving materials installed in residential properties. This can give you a competitive advantage on pricing.

Building Your Business

• Competent person scheme membership — this is your most important credential for domestic work
• Reputation — quality work and reliability build referrals faster than any advertising
• Online presence — Checkatrade, MyBuilder, Google My Business, and your own website
• Trade partnerships — build relationships with builders, plumbers, and other trades who can refer work
• Commercial contracts — property management companies, landlords, and letting agents need regular electrical work

Bookkeeping Tips

• Separate business and personal bank accounts
• Record CIS deductions carefully
• Keep materials and labour separate on all invoices
• Track test equipment purchases — they are fully deductible
• Reconcile weekly
• Set aside 25–30% of profits for tax

Accounted is built for UK tradespeople. It understands CIS, tracks deductions, and keeps everything ready for your tax return.

Key Deadlines

• 19th of each month — CIS return (if you engage subcontractors)
• 31 January — Self Assessment and payment
• 31 July — second payment on account
• Quarterly — VAT returns if registered
• Annually — competent person scheme renewal, insurance, ECS card

Getting Started

Starting an electrical business requires more qualifications than most trades, but the earning potential and demand make it worthwhile. Get your certifications, join a competent person scheme, register with HMRC, and keep your records clean.

Ready to electrify your business finances? Sign up for Accounted and let Penny handle the bookkeeping so you can focus on the work.