How to Register as a Tradesman in the UK

Setting up as a tradesperson in the UK is mostly admin, and the admin is where good builders lose money and time. Miss a registration and you can be turned away from a site, taxed at the higher CIS rate, or worse, breaking the law. This tool turns the maze into a single, ordered checklist: enter your name, your trade and whether you will use subcontractors, and download a printable document with every step you actually need.

The checklist marks what is a legal requirement and what is simply expected by clients and main contractors, because the two get muddled all the time. Below is the reasoning behind each step.

The order that actually works

There is a logical sequence to getting set up, and doing it in order saves you re-doing things.

1. Register as self-employed with HMRC as a sole trader, or set up a limited company. Do this before you start trading. A sole trader is simpler and cheaper; a limited company gives you limited liability and can be more tax-efficient at higher profits.
2. Register for the Construction Industry Scheme (CIS). As a subcontractor, this drops the tax deducted from your labour payments from 30% to 20%. You can register for CIS and self-employment at the same time.
3. Sort your trade-specific registration. This is the step that varies most by trade, and it is covered next.
4. Get insured, register for VAT when you cross the threshold, join an accreditation scheme, and get your CSCS card for site access.

The legal registrations you cannot skip

Two registrations are genuine legal requirements, not nice-to-haves.

Gas Safe Register. If you do any gas work at all, you must be on the Gas Safe Register. It is illegal to work on a gas appliance or gas pipework without it, full stop. This replaced the old CORGI scheme and is enforced to prevent carbon monoxide deaths. No qualification, no registration, no gas work.

Part P competent person scheme. For electrical work in dwellings in England and Wales, Part P of the Building Regulations applies. You do not need a licence as such, but to self-certify notifiable work you join a competent person scheme like NICEIC or NAPIT. Without scheme membership, notifiable work has to go through building control first, which is slow and costly.

Employers' liability insurance is the third hard legal requirement, but only once you employ someone: minimum GBP 5 million of cover, with daily fines for non-compliance.

The registrations that are expected, not required

The rest are technically optional but, in practice, the difference between winning work and being turned away.

• Public liability insurance is rarely a legal requirement but is demanded by almost every serious client, main contractor and accreditation scheme.
• A CSCS card is not law, but most sites will refuse you entry without one.
• Trade accreditation (TrustMark, Checkatrade, Which? Trusted Traders) is voluntary, but it builds the trust that turns enquiries into booked jobs. Our guide on social proof and trust for trades explains why these badges move the needle on conversion.

Common mistakes when registering

• Forgetting CIS. New subcontractors who skip CIS registration get 30% deducted instead of 20%, lending HMRC money interest-free until their tax return.
• Assuming public liability is the law. It usually is not, but you still need it to work. Conversely, people assume employers' liability is optional when it is mandatory the day they take on staff.
• Crossing the VAT threshold without noticing. GBP 90,000 of rolling 12-month turnover is easy to pass in a busy year. Miss it and you face penalties; the reverse charge rules add a further layer for construction work.
• Doing notifiable electrical work outside a scheme, then struggling to certify it.
• Pricing the job before pricing yourself. Once you are registered, work out what your hour is actually worth with the hourly rate calculator so you do not undercharge from day one.

If you subcontract, you take on more

The moment you pay other subcontractors, you become a CIS contractor as well as a subcontractor. That means registering as a contractor with HMRC before your first payment, verifying each subcontractor, deducting tax at the right rate, issuing payment and deduction statements within 14 days, and filing a CIS monthly return by the 19th of each month. Miss the return and the penalty starts at GBP 100 and climbs. Tick "Yes" to subcontractors in the tool and this step is added to your checklist automatically.

After registration: building the business

Registration gets you legal. It does not get you booked. Once the paperwork is done, the work shifts to winning and keeping customers: showing up when people search, answering enquiries fast, and turning quotes into jobs. The operations page covers how to run the back office without drowning in admin, and the rest of the free tools help you size up pricing, marketing and capacity.

When you are set up and ready to grow, talk to us and we will look at where your next customers come from.