How to Register as Self-Employed in the UK (2026 Guide)

Becoming self-employed in the UK is straightforward — but you do need to register with HMRC. Miss the deadline and you could face a penalty. This guide walks you through exactly when and how to register, what information you'll need, and what happens next.

Do I Need to Register as Self-Employed?

Yes, if you're earning money from work outside of regular employment, you need to tell HMRC. This applies whether you're:

• Freelancing alongside a day job
• Running a small business from home
• Doing occasional paid work (e.g. consultancy, photography, tutoring)
• Trading goods online (e.g. eBay, Etsy, Vinted)

The threshold is £1,000 gross income in a tax year (the trading allowance). Earn above that and you must register.

When to Register

You must register by 5 October following the tax year in which you started self-employment.

For example: if you started earning self-employed income in the 2025/26 tax year (April 2025 – April 2026), you must register by 5 October 2026.

Don't leave it late. HMRC can issue penalties if you register after the deadline and have unpaid tax. Registering early gives you a Government Gateway account, a UTR (Unique Taxpayer Reference), and time to set up your record-keeping before your first Self Assessment deadline.

How to Register: Step by Step

Step 1 — Create a Government Gateway Account

Go to HMRC's registration page and click "Register now". You'll be asked to create or sign in to a Government Gateway account. You'll need:

• Your National Insurance number
• A valid email address
• Proof of identity (passport or driving licence)

Step 2 — Register as Self-Employed

Once logged in, select "I am not employed — I work for myself". HMRC will ask:

• When you started self-employment
• What your business does (a broad description is fine — e.g. "freelance graphic design")
• Your home address (this becomes your registered business address as a sole trader)
• Your National Insurance number

Step 3 — Receive Your UTR

HMRC will post your Unique Taxpayer Reference (UTR) within 10 working days. This is a 10-digit number you'll use on every Self Assessment tax return and when contacting HMRC.

Keep it safe. You'll need it every year.

Step 4 — Set Up Self Assessment

Once registered, you'll automatically be enrolled in Self Assessment — HMRC's system for reporting income and paying tax. You'll need to:

• File a tax return each year by 31 January (online)
• Pay any tax owed by the same deadline
• Pay a second payment on account by 31 July

What Records Do You Need to Keep?

From day one of self-employment, you should track:

• All income received (invoices issued and paid)
• Business expenses (software, equipment, travel, home office costs)
• Bank statements

You're legally required to keep records for 5 years after the Self Assessment deadline for that tax year.

Using invoicing software like Billdrop means every invoice you create is saved with a record of the amount, date, and client — useful at tax time.

National Insurance as a Self-Employed Person

When you register as self-employed, you'll also need to pay National Insurance contributions:

• Class 2 NIC — a flat rate paid if your profits are above £12,570 (currently £3.45/week)
• Class 4 NIC — 9% on profits between £12,570 and £50,270; 2% above that

These are calculated and paid through your Self Assessment return — you don't pay them separately.

Do I Need to Register for VAT?

Not unless your VAT-taxable turnover exceeds £90,000 in a 12-month period. Below this, VAT registration is optional.

Some freelancers voluntarily register for VAT to appear more professional or to reclaim VAT on business purchases. If you do register, you'll need to charge VAT on your invoices and submit quarterly VAT returns.

Common Mistakes to Avoid

Registering too late — register as soon as you start earning self-employed income, not when you file your first tax return.

Not keeping invoices — HMRC can ask you to prove your income. Always issue numbered invoices and save them.

Missing payments on account — many new freelancers are surprised by HMRC's system of advance tax payments. Your first year may require two extra payments.

Forgetting Class 2 NIC — small but important. Missing NIC contributions affects your State Pension entitlement.

Summary

| Task | Deadline / Detail | |------|-------------------| | Register with HMRC | By 5 October after tax year starts | | Receive UTR | Within 10 working days | | File Self Assessment | 31 January (online) | | Keep records | For 5 years | | VAT registration | Required above £90k turnover |

Registering as self-employed takes about 15 minutes online. The longer-term job is keeping good records throughout the year. Start issuing professional invoices from day one — tools like Billdrop make it easy to create, download, and track invoices without any account required.

This article is for general information only. For personalised tax advice, consult a qualified UK accountant or tax adviser.