How to Register as Self Employed in the UK: A Step-by-Step Guide

Starting out as self-employed in the UK is an exciting step — but it comes with an important legal obligation that many new sole traders miss: you must register with HMRC as self employed. Fail to do so by the deadline and you could face an automatic penalty, even if you don’t owe any tax.

Do You Need to Register as Self Employed?

You must register as self employed with HMRC if you earn more than £1,000 from self-employment in a tax year. This is known as the Trading Allowance — income below this does not need to be declared.

The Registration Deadline

You must register by 5 October following the end of your first tax year of self-employment. Missing this deadline can result in a penalty from HMRC, so it’s worth registering as soon as you start trading.

How to Register as Self Employed: Step by Step

Step 1: Create a Government Gateway account

Go to gov.uk and create a Government Gateway account. You’ll need your National Insurance number and a form of ID.

Step 2: Register for Self Assessment

Once logged in, select “Register for Self Assessment” and confirm you are registering as a sole trader.

Step 3: Provide your personal and business details

• Your full name, address and date of birth
• Your National Insurance number
• The date you started self-employment
• The nature of your business
• Your business name (if different from your own name)

Step 4: Receive your UTR number

After registering, HMRC will post your Unique Taxpayer Reference (UTR) — a 10-digit number — within 10 working days.

Key Dates After You Register

Key Date	What to do
As soon as you start	Register with HMRC online
By 5 October	Deadline to register if you haven’t already
By 31 January	File your Self Assessment return and pay tax owed
By 31 July	Second payment on account (if applicable)

What Records Should You Keep?

• All sales invoices and receipts
• Bank statements for your business account
• Receipts for all business expenses
• Mileage logs if you use a vehicle for business
• Any contracts or agreements with clients

“Getting registered correctly from the start — and keeping good records — makes everything else much easier. Most problems I see could have been avoided with a quick conversation at the beginning.”