If you’ve started freelancing, taken on contract work, or begun earning money from a side hustle, one question comes up almost immediately:
“Do I need a UTR number?”
For most freelancers and anyone earning outside PAYE, the answer is yes. HMRC requires a UTR when you need to file a Self Assessment tax return, whether freelancing is your full-time job or something you do alongside regular employment. This guide explains when freelancers need a UTR, how the rules work for side income, and what you should do if you’re earning from multiple sources.
What is a UTR number?
A UTR (Unique Taxpayer Reference) is a 10-digit number issued by HMRC once you register for Self Assessment.
You’ll need it if you:
- make money from selling items online, gig economy apps or content platforms
- work for yourself
- earn untaxed income
- claim expenses or a CIS rebate
Do freelancers need a UTR?
Almost always — yes.
If you earn money without tax deducted by an employer, HMRC expects you to register for Self Assessment and get a UTR.
This includes:
- Freelancers (designers, developers, tutors, consultants)
- Contractors
- CIS subcontractors
- Side-hustlers (Etsy, Depop, eBay, dropshipping, affiliate income)
- Gig-economy workers (Uber Eats, Amazon Flex, Deliveroo, TaskRabbit)
- Content creators (YouTube, TikTok, Instagram, Twitch)
- Anyone earning extra income outside PAYE
If you are paid directly and tax isn’t automatically deducted, a UTR will be required.
Do you need a UTR for side hustle income?
Even if you only earn a small amount from your side hustle, you may still need to register.
Here’s how it works:
| Side Hustle Income | Do I Need a UTR? |
|---|---|
| Under £1,000 per year | No – falls under HMRC’s trading allowance |
| Over £1,000 per year | Yes – you must register for Self Assessment and get a Self employed UTR number |
Examples:
- Made £1,200 selling clothes on Vinted → UTR required
- Earned £800 from tutoring → no UTR needed
- Uber Eats + Fiverr combined £3,400 → UTR required
- YouTube ad revenue £1,050 → UTR required
HMRC looks at total untaxed income, not each source separately.
Why Freelancers Need a UTR (Even Part-Time)
A UTR is important because it allows you to:
✔ File your Self Assessment
You cannot file a tax return without it.
✔ Claim business expenses
Freelancers can deduct things like:
- software
- equipment
- travel
- home working costs
- training
- phone & internet
- tools (for trades)
These reduce your taxable profit.
✔ Stay compliant with HMRC
Failing to register can lead to penalties.
✔ Avoid the 30% CIS deduction
If you work in construction, not having a UTR means contractors must deduct 30% instead of 20%.
CIS Freelancers: Why a UTR Matters Even More
If you’re a subcontractor in construction:
- No UTR = 30% tax stopped at source
- With UTR = 20% standard CIS rate
Example:
- Invoice: £2,000
- Without UTR: £600 deducted
- With UTR: £400 deducted
A delay in getting your UTR could mean losing £200 per invoice, which you’ll only reclaim later via Self Assessment.
Do you need a UTR if you have a Full-Time job?
Yes, if you earn more than £1,000 from:
- freelancing
- reselling
- delivery apps
- tutoring
- content creation
- contract work
Your PAYE employer doesn’t cover tax on this income.
Multiple side hustles? You still only need one UTR
Your UTR stays the same for:
- full-time self-employment
- part-time freelancing
- CIS work
- ad revenue
- rental income
- reselling
- gig work
One number covers all income streams.
What happens if you don’t register?
You may face:
- Penalties for late registration
- Interest on unpaid tax
- 30% CIS deductions
- Delays claiming expenses and rebates
Need help registering for a UTR?
Tax2u makes UTR registration simple for freelancers, CIS workers, and anyone with side income.
We:
- complete the registration correctly
- handle HMRC on your behalf
- prevent delays and mistakes
- help you get set up for Self Assessment
Apply for your UTR with Tax2U today and keep your freelancing tax-compliant and stress-free.