Do I Need to Register as Self-Employed for a Side Hustle?

Short answer

If your gross side hustle income (before any expenses) stays at £1,000 or under in a tax year, you may not need to register or report it because of the trading allowance. If your gross side hustle income is over £1,000 in a tax year, a Self Assessment tax return may be required. The exact position depends on the type of activity and your wider circumstances.

What counts as a side hustle?

For HMRC purposes, a side hustle typically means trading or carrying out a business activity with a view to making a profit. Common examples include:

• Freelance or consulting work (writing, design, development, marketing, photography)
• Content creation (video, social media, podcasts, newsletters)
• Online selling of goods you made, sourced, or bought to resell
• Tutoring, coaching, or teaching
• Delivery or courier work
• Dog walking, cleaning, gardening, or other personal services
• Crafts, baking, or creative work sold for income

When HMRC may need to know

HMRC may need to know about your side income in situations including:

• Your gross side hustle income is over £1,000 in a tax year (before expenses)
• You are already registered for Self Assessment for another reason
• The activity is regular and profit-driven

How the £1,000 trading allowance works at a basic level

HMRC provides a trading allowance of £1,000 per tax year. If your total gross trading income from all your self-employment and trading activities is £1,000 or less in a tax year, you may not need to register for Self Assessment or pay any tax on that income.

• The £1,000 figure is based on gross income, not profit after expenses
• The allowance applies across all your trading income combined, not separately per activity or platform
• If your gross trading income is over £1,000, the allowance can still be used to reduce your taxable income (instead of claiming actual expenses), but you may need to register and file a Self Assessment return
• A separate property income allowance of £1,000 exists for rental income. The trading allowance and the property allowance are different things.

Can I be employed and self-employed at the same time?

Yes. You can have a PAYE employment and also carry out self-employed activity at the same time. Your employer pays your wages through PAYE and deducts tax and National Insurance on your earnings from them. Your side hustle income is separate from that. If your side hustle gross income is over the trading allowance threshold, you may need to register for Self Assessment and report both your employment income and your side hustle income on a tax return. Your employer's PAYE scheme does not automatically cover your separate trading income.

What if I sell online?

Selling on online platforms does not automatically create a tax obligation, but it does not automatically mean you are exempt either. The key question is the same: is your gross income from the activity over £1,000 in the tax year, and is it genuinely trading activity?

• Selling occasional personal items (old clothes, unwanted gifts, second-hand household goods) is generally not treated as trading
• Buying goods to resell for profit, creating goods to sell, or delivering services through an online platform is more likely to be treated as trading
• Online platforms do not typically report your income to HMRC on your behalf

What if I already started earning?

If you have already been earning side income, the same checks apply. The key question is whether your gross income from the activity was over £1,000 in the relevant tax year. The UK tax year runs from 6 April to 5 April the following year. If you think a registration or reporting requirement may apply, it is worth checking sooner rather than later. HMRC's guidance on GOV.UK explains the registration process and timing. If you are unsure about your specific position, speaking to a qualified accountant is a reasonable step.

What to check before registering

Before deciding whether to register as self-employed, it may be useful to check:

1. 1Whether your gross side hustle income for the tax year is over £1,000
2. 2Whether you are already registered for Self Assessment for another reason
3. 3Whether the activity is genuinely trading (not just occasional selling of personal items)
4. 4What your income and expense records look like (keeping records from when you start is an HMRC expectation)
5. 5Whether Self Assessment may apply for other reasons (for example, other untaxed income, dividend income over your allowance, or income over £100,000)

When to get professional advice

This article gives general guidance for UK beginners. It does not assess your full circumstances. If you are unsure whether any of this applies to you, if your situation involves multiple income sources, previous years to check, significant amounts, or any complexity, speaking to a qualified accountant or tax adviser is the appropriate next step.