Side hustles in the UK — freelancing, selling on Etsy or eBay, renting a room, tutoring — are subject to tax once your additional income exceeds certain thresholds. Getting this wrong means unexpected tax bills from HMRC.
The key thresholds you need to know
| Threshold | Amount | What it means |
|---|---|---|
| Trading allowance | £1,000/year | Under this, no tax, no need to declare |
| Property allowance | £1,000/year | First £1,000 of rental income tax-free |
| Self Assessment threshold | £1,000+ trading income | Must register for Self Assessment |
| Class 4 NI threshold | £12,570 profit | Pay 6% NI on profits above this |
What side hustle income you must declare
- Freelance/consulting income above £1,000/year
- Selling goods (eBay, Etsy, Vinted) regularly for profit (not just clearing out your home)
- Rental income (Airbnb, lodger) above the £1,000 property allowance (or £7,500 under Rent a Room scheme)
- Online content creation (YouTube, Twitch) income above £1,000
- Tutoring, coaching, personal training income
Allowable expenses that reduce your tax bill
- Equipment purchased for the business (laptop, camera, tools)
- Software and subscriptions used for work
- A proportion of home costs if you work from home (internet, heating)
- Travel and accommodation for business purposes
- Professional development and training
- Professional indemnity insurance
💡 The Rent a Room scheme
If you rent out a furnished room in your main home (not a buy-to-let), the first £7,500 of rental income per year is completely tax-free under the Rent a Room scheme. If you're a homeowner or renter (with landlord permission), this is one of the most tax-efficient income sources available in the UK.
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