Navigating Self-Employment Registration
Are you working for yourself but haven't formalized it yet? Or perhaps you're setting up a business and wondering if you need to notify HMRC? Embarking on a self-employed journey can seem daunting at first, but this guide will help you understand the rules and legal requirements. Read on to learn when you need to register as self-employed, the deadlines involved, and how to complete the process.
Friendly Disclaimer: Although I am an accountant, I am not your personal accountant. The information provided is accurate but intended for general guidance. Everyone's situation is unique, so use your best judgment when applying this advice. For specific questions, consult a qualified professional to avoid potential penalties.

When Do You Need to Register as Self-Employed?
You are considered self-employed if you earn money from working for yourself or running a business that sells products or services. Typically, this income is untaxed, meaning it’s paid to you without any tax deductions, and you must declare it yourself.
You are legally required to register as self-employed if your income (not just your profit) exceeds £1,000 in a tax year. If your income is below this threshold, you don't need to inform HMRC or pay tax, though you should verify if claiming the trading income allowance is appropriate for you.
Regardless of your profit or tax liability, you must inform HMRC by 5th October following the end of the tax year in which you started your business. A tax year runs from 6 April to 5 April. For example, if you started your business on 1 January 2022, you must register by 5 October 2022.
Although the deadline is 5 October, it's wise to register as soon as possible to avoid an automatic £100 penalty for late registration.

Can You Operate a Business Without Registering?
Every sole trader must register for tax, regardless of profitability. This is because HMRC uses self-assessment to monitor earnings. You can begin working for yourself without immediate registration, but once your turnover surpasses £1,000, you must register as self-employed.
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If you're considering operating through a Limited Company, you'll need to register with Companies House before using the name with “Ltd” or “Limited” and open a business bank account.
Not sure which legal structure suits you?

Read this guide:

Sole Trader or Limited Company? Which Business Structure is Right for You?
How Much Can You Earn as Self-Employed Without Paying Tax?
For the 2024/25 tax year, you can earn up to £1,000 tax-free using the trading income allowance. Once your income exceeds this amount, you can earn up to £12,570 in profit without paying income tax, thanks to the personal allowance – the amount everyone in the UK can earn tax-free. Even if you owe no tax, you must still register as self-employed and inform HMRC about your earnings.
If your profits exceed the tax-free threshold, income tax rates apply as follows:

• 20% (basic rate) on profits between £12,570 and £50,270

• 40% (higher rate) on profits between £50,271 and £150,000

• 45% (additional rate) on profits over £150,000

Income Tax Bands
If you have multiple sources of income, such as being both employed and self-employed, your tax is calculated on your total earnings. Read this guide for more information.
As a self-employed person, you will also pay National Insurance on your profits. For the 2024/25 tax year, the rates are:

• Class 2 National Insurance: £3.05 per week on profits over £6,515 annually

• Class 4 National Insurance: 9% on profits between £9,658 and £50,270, and 2% on profits above this threshold

Some choose to pay Class 2 National Insurance voluntarily to keep their records up-to-date and maintain eligibility for state benefits like maternity allowance and the state pension.
Understanding when and how to register as self-employed doesn't have to be overwhelming. With the right information, the process can be straightforward.