How to Register as Self-Employed as a Tradesperson
Going self-employed as a tradesperson is one of the most rewarding decisions you can make — but before you take on your first job, you need to make sure you're properly registered with HMRC. It's simpler than most people think, and getting it right from the start saves a lot of hassle further down the line.
This guide walks you through exactly how to register as self-employed as a tradesperson in the UK — what you need, how to do it, and what happens next.
Do You Need to Register as Self-Employed?
Yes — if you're working for yourself as a tradesperson, whether full-time or alongside employed work, you must register as self-employed with HMRC.
This applies if you:
- Are starting your own trade business as a sole trader
- Are taking on private work alongside an employed position
- Are operating as a subcontractor for other businesses
- Earn more than £1,000 from self-employment in a tax year
You must register by 5th October in the second tax year after you start trading. So if you start trading in the 2025/26 tax year, you must register by 5th October 2026. But there's no reason to wait — register as soon as you start trading to make sure everything is set up correctly from the beginning.
What You'll Need Before You Start
Before you begin the registration process, make sure you have the following to hand:
- Your National Insurance number
- Your personal details — full name, date of birth, address
- Your business name if you're trading under one — for example "Smith Electrical Services" rather than just your own name
- The date you started or plan to start trading
- A phone number and email address
That's genuinely all you need. The registration process is straightforward and takes around 10–15 minutes online.
How to Register as Self-Employed With HMRC — Step by Step
Step 1: Create a Government Gateway Account
Go to gov.uk and search for "register as self-employed" or go directly to the HMRC online services page. You'll need to create a Government Gateway account if you don't already have one.
To create your account you'll need to verify your identity — HMRC will ask you to confirm details from documents like your passport, driving licence, or a recent payslip. Follow the on-screen prompts and make a note of your Government Gateway user ID when it's issued — you'll need this every time you log in to HMRC services.
Step 2: Register for Self Assessment
Once you have your Government Gateway account, log in and select "Register for Self Assessment." You'll be asked to confirm that you're registering as a sole trader — select this option.
Work through the registration form completing the following:
- Your personal details
- Your National Insurance number
- The nature of your business — describe your trade clearly, for example "Electrical contractor" or "Plumbing and heating engineer"
- Your business address — this can be your home address if you work from home
- The date your self-employment started
Step 3: Wait for Your UTR Number
After submitting your registration, HMRC will send your Unique Taxpayer Reference — your UTR number — to your registered address. This typically arrives within 10 working days.
Your UTR is a 10-digit number that identifies you for tax purposes. Keep it safe — you'll need it every time you file a tax return or contact HMRC about your Self Assessment.
Step 4: Set Up Your Online Tax Account
Once you receive your UTR, log back in to your Government Gateway account and activate your Self Assessment online account. This is where you'll file your annual tax return and pay any tax owed.
HMRC will also send you an activation code by post — enter this when prompted to complete the setup of your online account.
What Happens After You Register
Once you're registered, you have ongoing responsibilities as a self-employed tradesperson.
Keep records of all income and expenses
From the day you start trading, keep a record of every payment you receive and every business expense you incur. This is a legal requirement — HMRC can ask to see your records going back up to five years. Good accounting software makes this effortless — more on that below.
Complete a Self Assessment tax return each year
Your tax return covers your income and expenses for the previous tax year — 6th April to 5th April. The deadline to file online and pay any tax owed is 31st January each year. Missing this deadline results in automatic fines starting at £100.
Pay Income Tax and National Insurance
As a self-employed tradesperson you pay income tax on your profits above the personal allowance (£12,570 for 2025/26). You also pay Class 2 and Class 4 National Insurance contributions. These are calculated when you complete your Self Assessment return.
Register for VAT if your turnover exceeds the threshold
Once your taxable turnover exceeds £90,000 in a rolling 12-month period, you must register for VAT. Below that threshold, registration is optional. Speak to an accountant about whether voluntary VAT registration makes sense for your business.
What About the Construction Industry Scheme (CIS)?
If you work as a subcontractor in the construction industry, you need to be aware of the Construction Industry Scheme — CIS.
Under CIS, contractors deduct money from your payments and pass it directly to HMRC as advance payment towards your tax and National Insurance. The standard deduction rate is 20% — or 30% if you're not registered for CIS.
How to register for CIS:
- Register as self-employed first as described above
- Then register for CIS as a subcontractor through your Government Gateway account or by calling the CIS helpline on 0300 200 3210
- Give your UTR number to contractors when you start working for them
CIS deductions are not an additional tax — they're advance payments that are offset against your final tax bill when you complete your Self Assessment return. If your CIS deductions exceed your actual tax liability, you'll receive a refund.
If you work for multiple contractors and your CIS deductions regularly exceed your tax bill, you may be able to apply for gross payment status — meaning contractors pay you in full without deducting tax. This requires a good compliance record with HMRC.
Setting Up Your Finances Properly From Day One
Registering with HMRC is just the first step. Getting your finances set up properly from the start makes everything significantly easier going forward.
Open a dedicated business bank account
Keep your business and personal money completely separate. Starling Bank offers a free business account that's excellent for sole traders — it connects to accounting software and gives you a clear view of your business finances at all times.
Start using accounting software immediately
Don't try to manage your income and expenses in a spreadsheet or — worse — on paper. Accounting software like Xero or QuickBooks connects to your bank account, categorises transactions automatically, and prepares your figures for Self Assessment throughout the year. Starting from your very first invoice means your records are always in order.
Set aside money for tax from every payment
The biggest shock for many new sole traders is the first Self Assessment tax bill. Avoid this by setting aside 25–30% of every payment you receive into a separate savings account for tax. Do it automatically — transfer the money the moment a payment hits your account.
Get a fuel card
If you're using a van for work, a fuel card simplifies expense tracking and saves money on fuel. Every fill-up is automatically recorded and invoiced — no more keeping paper receipts.
Common Mistakes New Self-Employed Tradespeople Make
Registering late
HMRC charges penalties for late registration. Register as soon as you start trading — don't leave it until you're approaching the deadline.
Not keeping records
HMRC expects you to keep records of all income and expenses. Without records, you can't claim allowable expenses — meaning you pay more tax than you need to. And if HMRC ever investigates your affairs, poor records make everything significantly harder.
Forgetting to set aside money for tax
Your tax bill arrives in January — if you haven't been saving throughout the year, it can cause serious cash flow problems. Set money aside from every payment without exception.
Not claiming all allowable expenses
Most new self-employed tradespeople underclaim on expenses — paying more tax than they need to. Make sure you're claiming everything you're entitled to. We cover this in detail in our guide to what expenses a tradesperson can claim on tax.
Mixing business and personal finances
Running your business through your personal bank account makes it almost impossible to keep track of what you've earned and spent. Open a business account from day one.
Setting Up Your Job Management System
Once you're registered and your finances are in order, the next priority is making sure you can manage your jobs professionally from the start.
Tradify is the best job management platform for UK tradespeople just starting out. It lets you create and send professional quotes, manage your jobs and schedule, generate invoices, and chase payments — all from your phone. For a new tradesperson who wants to look professional from day one without spending hours on admin, it's the obvious starting point.
Try Tradify Free — No Card RequiredThe Bottom Line
Registering as self-employed is simpler than most people expect — it takes around 15 minutes online and costs nothing. The important thing is to do it promptly, get your finances set up properly from the start, and build good habits around record-keeping and tax saving from your very first job.
Get the admin right from day one and you'll be able to focus on what you actually went self-employed to do — the trade work itself.
Try Tradify Free — No Card RequiredTradeStack HQ helps UK tradespeople find the best software and AI tools to run a smarter business. Browse our full blog for reviews, comparisons, and practical guides built for the trades.