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GUIDE — FOR NEW ARRIVALS AND NEW STARTERS

Start working on UK building sites

The paperwork every builder needs, in the right order: right to work, National Insurance number, UTR, CIS and CSCS.

  • Available in English, Polish, Romanian and Ukrainian
  • Links to official GOV.UK pages
  • Free, no sign-up
Tradesman holding a hard hat on a UK building site

1Check you can work in the UK

Employers must check your right to work before you start. Most people prove it online with a Home Office share code. If you are unsure about your status, check before you take a job.

2Get a National Insurance number

You need it to pay tax and National Insurance. You can often start work while you wait for it to arrive, but apply as soon as you can.

3Open a UK bank account

Employers and contractors pay into a UK account. Take your ID and proof of address. Some banks have accounts made for people who have just arrived.

4Decide how you will work: employed or self-employed

Employed (PAYE): your employer handles your tax. Self-employed (CIS): you invoice a contractor and look after your own tax. Your status depends on how you really work, not only on what you choose. Compare the money side first.

5If you are self-employed: register with HMRC and get your UTR

Register for Self Assessment. HMRC posts your Unique Taxpayer Reference (UTR). It can take a few weeks, and longer if you are abroad.

6If you are self-employed: register for CIS

If you are not registered, contractors must deduct 30% from your labour payments instead of 20%. You need your UTR and your National Insurance number.

7Get your CSCS card

Most sites will not let you start without one. You pass the CITB Health, Safety and Environment test and show the right qualification for your role.

8Sort your insurance

Many contractors expect self-employed workers to carry public liability insurance. Employed workers are normally covered through their employer.

9Get your PPE and basic tools

Hard hat, safety boots, hi-vis and gloves are the minimum on most sites. If you are employed, ask what your employer provides.

10Create your profile and get found

Tell UK contractors who you are: your trade, CSCS, day rate and where you can work. It is free and you keep 100% of your rate.

Good to know

Links marked Partner may earn us a small commission, at no extra cost to you. General information, not legal or tax advice — the links go to the official GOV.UK and CSCS pages.

Common questions

Do I need to do these in order?

Mostly yes — the right to work and National Insurance number come first, and the UTR and CIS steps only matter if you will be self-employed. You can often start the CSCS test while you wait for other paperwork.

Is it better to be employed or self-employed?

It depends on how you work and what you are offered, and your status is decided by how the work is really done. Use the take-home calculator to compare the money, then check your employment status with HMRC.

Pay only when it works

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