Do I Need to Register as Self-Employed?

If you've started earning money outside of a regular job, for example, freelancing, selling online, doing odd jobs, or starting a side business, you might be wondering whether you actually need to tell HMRC. Here's a straightforward answer.

When you need to register

You generally need to register as self-employed with HMRC if:

- Your income from self-employment is more than £1,000 in a tax year (before expenses)
- You want to pay voluntary Class 2 National Insurance contributions, even if you earn under £1,000
- You need to prove you're self-employed for other reasons (e.g. claiming certain benefits, or applying for a mortgage)

If your income is under £1,000, you may qualify for the "trading allowance," which means you don't need to register or declare that income, but it's still worth understanding the rules, especially if your income is growing.

What counts as self-employment?

You're likely self-employed if you:

- Run your own business and are responsible for its success or failure
- Have multiple clients or customers, rather than one employer
- Decide how, when, and where you work
- Can hire others to help you, and pay for your own equipment or materials

This applies whether you see it as a "proper business" or just something on the side — HMRC doesn't distinguish based on how big or small it feels to you.

When do I need to register by?

You must register by 5 October following the end of the tax year in which you started self-employment. For example, if you started earning self-employed income in June 2025, you'd need to register by 5 October 2026.

That said, registering earlier is almost always a good idea as it gives you more time to understand your obligations and avoid a last-minute scramble.

What happens after you register?

Once registered, you'll need to:

- File a Self Assessment tax return each year
- Pay Income Tax and Class 2/Class 4 National Insurance on your profits
- Keep records of your income and expenses throughout the year

Common situations people aren't sure about

- Selling on platforms like eBay, Vinted, or Etsy regularly — if this goes beyond occasionally clearing out your wardrobe and becomes a regular income source, you may need to register
- Freelance or consulting work alongside a full-time job — yes, you'll usually need to register for this too, even while employed elsewhere
- Renting out a room or property — this typically falls under different rules (property income), rather than self-employment, but often still requires registration

Not sure if this applies to you?

The rules can feel a bit blurry, especially if your side income has grown gradually without a clear "start date." If you're unsure whether or when you should have registered, it's much better to get it sorted proactively rather than waiting for HMRC to raise it with you.

Get in touch and we can quickly work out whether you need to register, and get everything set up correctly from the start.