Thinking about becoming your own boss? Whether you’re a tradesperson, freelancer, or side-hustler, going self-employed in the UK can be exciting but it also comes with a few admin steps. If you’re unsure where to start or what “registering as self-employed” really means, this guide breaks it all down clearly.
By the end, you’ll know exactly how to go self-employed, what to register for, and how to stay compliant with HMRC without the stress.
Step 1: Understand what it means to be self-employed
If you work for yourself by providing a service or selling goods for profit, HMRC will class you as self-employed. That includes:
- Freelancers (e.g. designers, writers, developers)
- Tradespeople (e.g. plumbers, electricians, builders)
- Side-hustlers earning from a second income (e.g. selling online, tutoring, photography)
When you go self-employed, you’re responsible for managing your own income, taxes, and National Insurance contributions.
If your total earnings from self-employment are over £1,000 in a tax year, you’ll need to officially register with HMRC.
Step 2: Register as self-employed with HMRC
To make your business official, you must register as self-employed with HMRC. This gives you a Unique Taxpayer Reference (UTR), a 10-digit number used to manage your tax records.
You can register directly through HMRC, but the process can be confusing if you’ve never done it before. A quicker way is to do it through Tax2u it only takes a few minutes and we handle all the details for you register here and it takes under 3 minutes.
Step 3: Keep track of your income and expenses
Once registered, you’ll need to keep records of:
- Money you earn (invoices, receipts, etc.)
- Expenses related to your business (equipment, travel, tools, etc.)
Keeping good records makes completing your annual Self Assessment tax return much easier and helps you claim allowable expenses to reduce your tax bill.
Pro tip: Use a simple bookkeeping app or spreadsheet from day one. It’ll save you hours later.
Step 4: File your self assessment tax return each year
Each tax year (which runs from 6 April to 5 April), you’ll need to file a Self Assessment showing your income and expenses.
Important deadlines:
- 5 October: Register as self-employed for the first time
- 31 January: Submit your online tax return and pay any tax due
Even if you only earned a small amount, you must still submit your return once you’re registered.
If this sounds daunting, don’t worry we help thousands of self-employed people file accurately and on time every year.
Step 5: Budget for tax and national insurance
When you’re self-employed, tax isn’t deducted automatically like it is for employees. You’ll need to set money aside for:
- Income Tax based on your profits after expenses
- Class 2 and Class 4 National Insurance depending on your earnings
A good rule of thumb is to save around 20–25% of your income for your tax bill.
Step 6: Consider business tools and insurance
Starting out self-employed also means thinking about:
- Business insurance (like public liability or professional indemnity)
- Accounting software to manage invoices
- A business bank account to keep finances separate
These aren’t legally required, but they make running your business smoother and more professional.
Common questions about becoming self-employed
Do I need to register if I only have a side hustle?
Yes, if you earn more than £1,000 from your side hustle in a tax year, HMRC requires you to register as self-employed.
How long does it take to get a UTR number?
Usually around 10 working days (or slightly longer if you’re overseas). Using a service like Tax2U speeds things up and ensures your application is submitted correctly the first time.
Can I go self-employed while working a full-time job?
Absolutely! Many people start as self-employed alongside their regular job. You’ll just need to complete a Self Assessment for your freelance income.
Step 7: Make it official – Register today
Taking the first step to go self-employed doesn’t have to be complicated. Once you’ve registered, you can focus on growing your business and we’ll handle the paperwork.
Ready to make it official?
Register as self-employed with Tax2u it’s quick, simple, and fully supported by our UK tax experts.
Summary table: Your self-employment checklist
| Step | Action | Why it matters |
|---|---|---|
| 1 | Confirm you’re self-employed | Ensures HMRC classifies you correctly |
| 2 | Register with HMRC | Get your UTR number for tax returns |
| 3 | Track income & expenses | Easier tax filing and savings |
| 4 | File Self Assessment | Stay compliant and avoid penalties |
| 5 | Budget for tax | Prevents end-of-year surprises |
| 6 | Use tools & insurance | Keeps your business professional |
| 7 | Register with Tax2u | Fast, reliable registration process |
Final thoughts
Becoming self-employed in the UK opens up freedom, flexibility, and new opportunities but it starts with getting registered properly. Once your UTR is sorted and you understand your tax responsibilities, you’re free to focus on what you do best: building your business.
If you’re ready to start today, Tax2u can help you register as self-employed in under 3 minutes with full support from our friendly UK team.