Understanding Self-Employment
Being self-employed means working for yourself and running your own business. Unlike employees, whose employers deduct taxes automatically, self-employed people are responsible for managing their finances, including paying Income Tax and National Insurance.
This applies to freelancers, tradespeople, gig economy workers, consultants, and those selling goods online. Even if you’re doing this alongside a regular job, you still need to register if your income from self-employment exceeds certain limits.
Do You Need to Register?
You must register with HMRC for Self Assessment if you earn more than £1,000 in a tax year from self-employed work. This £1,000 is your gross income – the amount before any expenses.
For those who earn over £1,000, there’s a choice: you can either claim a flat £1,000 ‘trading allowance’ to reduce your taxable profit or deduct your actual business expenses. You can’t do both. Choose the option that gives you a lower tax bill.
If you sell goods regularly (for example, on eBay or Etsy), provide a service for payment, or advertise your work, HMRC is likely to class you as trading, even if you think it’s just a side project.
When Should You Register?
You must register by 5 October in your business’s second tax year. For example, if you begin working for yourself in July 2025 (within the 2025/26 tax year), your second tax year starts on 6 April 2026, giving you until 5 October 2026 to register.
However, it is advisable to register sooner. Early registration provides your Unique Taxpayer Reference (UTR) and helps you prepare for tax and National Insurance obligations.
Failing to meet this deadline can result in penalties from HMRC. Register promptly to avoid these costs.
Step-by-Step Guide: How to Register as Self-Employed
The registration process is simple and primarily completed online via GOV.UK. Below are the steps to follow.
Create a Government Gateway Account
First, set up a Government Gateway account. This account allows you to access HMRC’s online services. To create it, you will need:
- An email address
- A phone number
- Your National Insurance number (found on payslips or HMRC correspondence; apply for one here if needed)
Follow the instructions to establish your account, and note your user ID and password.
Register Online for Self Assessment
Next, log into your Government Gateway account and select the option to register for Self Assessment. This is the system HMRC uses to collect taxes from self-employed individuals. Choose ‘sole trader’ if you work alone, then provide:
- Your full name and address
- Your National Insurance number
- Details of your business, including its start date and nature
- The reason for registering (e.g., income over £1,000 from self-employment)
Receive Your UTR Number
After registering, HMRC will set up your Self Assessment account and mail you a Unique Taxpayer Reference (UTR). The UTR is a 10-digit number that identifies you for tax purposes.
After completing the above steps, you are officially registered as a sole trader. From now on, HMRC expects you to submit an annual Self Assessment tax return and pay any Income Tax and National Insurance due.
After You Register with HMRC as Self-Employed: What’s Next?
Once registered, several responsibilities follow to maintain compliance and manage your finances effectively.
Keeping Records
You are required to keep accurate records of your income and expenses. This includes retaining invoices, receipts, and bank statements.
Thorough records simplify the completion of your Self Assessment tax return and allow you to claim allowable expenses, reducing your tax liability. Accounting software such as Xero can streamline the process.
Completing Your Self Assessment Tax Return
Each year, you must submit a Self Assessment tax return to report your earnings and calculate your Income Tax and National Insurance contributions. The online filing deadline for the 2025/26 tax year is 31 January 2027. Paper returns are due by 31 October 2026, though online submission is recommended for its convenience and extended deadline.
Self-employed people pay the following taxes:
- Income Tax
- Class 2 National Insurance
- Class 4 National Insurance
Our self-employed online tax calculator can show the total Income Tax and National Insurance you must pay on your earnings.
This article covers Class 2 and Class 4 NI in more detail.
Deadlines to Remember
Tax payments have fixed dates:
- 31 January: Settle your tax bill for the previous tax year, and if your tax exceeds £1,000, make your first ‘payment on account’ for the following year.
- 31 July: Submit your second payment on account, if applicable.
Late payments incur penalties.
Optional: VAT and Other Registrations
When to Register for VAT
Value Added Tax (VAT) is a tax applied to the sale of most goods and services. Businesses must register for VAT with HMRC if their VAT taxable turnover exceeds a specific threshold.
If your taxable turnover exceeds £90,000 in a 12-month period, you must register for VAT. This involves charging VAT on sales and submitting VAT returns. Voluntary registration is an option if your turnover is lower, particularly if you wish to reclaim VAT on business purchases.
This article covers VAT registration in more detail.
CIS for Construction Workers
Construction workers may need to register with the Construction Industry Scheme (CIS). The scheme applies to subcontractors and adjusts tax deductions. Register separately after your Self Assessment enrolment.
Common Questions
Can I Be Employed and Self-Employed?
Yes, you can hold a PAYE job while being self-employed. If your self-employment income exceeds £1,000, you must register and report both income sources on your tax return.
What If I Make a Loss?
You must still file a tax return if your business incurs a loss.
The loss can be offset against other income. This can reduce future tax obligations or secure a refund. Professional advice from an accountant such as U&W may be required.
How Do I Deregister If I Stop Trading?
To cease self-employment, inform HMRC through your Government Gateway account or phone. Submit a final tax return to conclude your obligations. Failing to tell HMRC may lead to unnecessary demands for returns.
Summary
Registering as self-employed in the UK is essential to operating legally and managing your tax responsibilities.
The process begins with establishing a Government Gateway account, registering for Self Assessment as a sole trader, and receiving your UTR.
Subsequently, maintain records, submit your Self Assessment tax return by 31 January, and make tax payments on time, including National Insurance contributions. Additional registrations, including VAT or CIS, may apply depending on your business.
For further assistance, contact HMRC or consult an accountant such as U&W.
