Register as self-employed for OnlyFans once your gross income from content and any other trading in a UK tax year (6 April to 5 April) goes over £1,000, counting the value of gifts and free products you received for promotion. HMRC must hear from you by 5 October after that tax year ends, which for the 2025 to 2026 year is Monday 5 October 2026. You can start trading before you register and you can register early; what you cannot do is skip it because the income feels like a hobby.
This guide covers the trigger, the steps and what to do if the date has passed, using HMRC and GOV.UK pages checked on 2 October 2026. For the bigger picture of tax and National Insurance, start with our overview of OnlyFans tax in the UK; for filing and payment dates after you register, see the Self Assessment deadlines calendar for creators.
The trigger, in HMRC's own terms
GOV.UK's page on who must send a tax return puts it in one line: you must send one if, in the last tax year, you were self-employed as a sole trader and earned more than £1,000 before taking off anything you can claim tax relief on. The figure is gross, so platform fees, equipment and an agency's share do not bring you under it.
HMRC's campaign page Tax rules for content creators fills in the details for creators. The £1,000 is a single allowance across every side hustle, gifts and services received for promoting products count as income, and the deadline to register is 5 October. It also corrects a rumour that nothing is needed until £3,000: a simpler reporting tool for income between £1,000 and £3,000 is planned by 2029, but until it exists, income over £1,000 means Self Assessment.
The timing is written into HMRC's penalty factsheet too. CC/FS11 on penalties for failure to notify says that when profits from self-employment first make you chargeable to tax, you must tell HMRC within 6 months of the end of the tax year, which is where 5 October comes from.
Registration decision flow
Answer these in order for each tax year. You will need monthly statements from every platform, because GOV.UK warns that some platforms total income by calendar year rather than by tax year.
- Between 6 April and 5 April, did you receive money, gifts or services for content, promotion, selling or other services? If not, there is nothing to register for that year.
- Add up the gross total across all of it, valuing gifts at what they would have cost you. If it is over £1,000, go to step 4.
- If it is £1,000 or less, you may not need to tell HMRC, but GOV.UK says you must keep records of that income. Consider registering anyway if you made a loss you want relief for, want to pay voluntary Class 2 National Insurance, or need to prove self-employment for Tax-Free Childcare or Maternity Allowance.
- Check whether any of the trading income came from a company you or someone connected to you controls, a partnership you are in, or your employer. If so, the trading allowance cannot be used that year, so ask HMRC how the test applies before relying on the £1,000.
- Have you sent a Self Assessment return before? If not, or if you were registered but did not need to send one for the 2024 to 2025 year, you must register by 5 October.
- If you did send a return for 2024 to 2025, you are already in Self Assessment. The new income goes on your next return, and the GOV.UK registration service will tell you whether the new self-employment also needs registering. People who were registered before but sent no return last year may need to reactivate their account through the same service.
Steps 3 and 4 come from GOV.UK's guidance on tax-free allowances on property and trading income, which also confirms that once gross income passes £1,000 you must register by 5 October in the following tax year.
How to register, step by step
- Start from GOV.UK's Check how to register for Self Assessment page, which routes you to the right service and handles reactivation for people registered before.
- Register as a sole trader. GOV.UK's sole trader guide says you can trade under your own name or a trading name, and that you can choose to register before you reach £1,000.
- Wait for your Unique Taxpayer Reference. GOV.UK says the UTR is a 10-digit number that usually arrives by post around 15 days after you register, longer if you live overseas, and that you can check when to expect a reply.
- Keep the letter. Afterwards you can find your UTR in your Personal Tax Account, in the HMRC app, or on returns and other HMRC letters.
- Set up your records from the first payment: cash basis is the default for sole traders, so you record income when you receive it and expenses when you pay them.
- When a platform asks for your tax details, a UK seller gives a National Insurance number, not the UTR; the platform-side rules are on GOV.UK's digital platform seller page.
The UTR timings are from GOV.UK's Find your UTR number page; some third-party guides quote a shorter wait, so plan around the official figure, especially if you register close to the deadline.
A worked timeline for a first-time creator
Take a creator who began selling subscriptions in January 2026 and whose gross income, including gifted products from a brand, passed £1,000 before 5 April 2026. That income belongs to the 2025 to 2026 tax year, so the registration date is 5 October 2026. Registering on, say, 1 October would usually bring the UTR by post around the middle of the month. The first return is then due online by 31 January 2027, which is also the date to pay the 2025 to 2026 bill. If a payment on account is required, the first one for 2026 to 2027 is due that same day, which our deadlines guide covers with a cash planner.
If the same creator's income for 2025 to 2026 had stayed at £1,000 or less and only passed it during 2026 to 2027, nothing would be due in October 2026; the trigger year becomes 2026 to 2027 and the registration date moves to 5 October 2027. Registering early is allowed and can make the first January less rushed.
Missed 5 October: the fix list
A late registration is fixable, and the order you do things in affects the outcome. The GOV.UK deadlines and penalties pages set out what happens:
| Situation | What GOV.UK says | Your move |
|---|---|---|
| You register after 5 October 2026 | You could get a penalty; HMRC sends a letter or email setting a filing deadline 3 months from its date | Register now rather than waiting for January |
| The tax for 2025 to 2026 | Still has to be paid by 11:59pm on 31 January 2027 or a penalty follows | Estimate the bill early and set the money aside |
| Late registration and tax still unpaid at 31 January | A failure to notify penalty may apply, based on the amount left to pay, issued within 12 months of HMRC receiving the return | Paying everything by 31 January is the strongest protection |
| You had a genuine reason for missing it | CC/FS11 says no penalty if you had a reasonable excuse, the failure was not deliberate, and you told HMRC without unreasonable delay once it ended | Write down the reason and dates, and tell HMRC |
| Earlier years were never reported | You can register and declare untaxed income from the last 4 years, with a separate return for each year | Contact HMRC first; it says it may then consider your case more favourably |
| You cannot pay in full | HMRC may agree a payment plan if it is affordable | Ask before the due date rather than after |
If a penalty is charged, CC/FS11 explains how it is sized: a percentage of the potential lost revenue, set by whether the failure was non-deliberate, deliberate, or deliberate and concealed, and whether you told HMRC before you had reason to think it was about to find out. For a non-deliberate failure disclosed unprompted within 12 months of the tax being due, the range is 0% to 30%, and HMRC reduces penalties within each range for telling it about the failure, helping it work out the figures and giving access to records. The earlier-years row comes from GOV.UK's page for people who have not told HMRC about income.
What counts as a reasonable excuse is narrower than many people hope. GOV.UK's reasonable excuses page gives examples such as a close bereavement shortly before a deadline, an unexpected hospital stay, a serious illness, or a computer failure while preparing an online return, and lists finding HMRC's systems too difficult and not getting a reminder as excuses that will not be accepted.
Limitations of this guide
This is general information from HMRC and GOV.UK pages as they read on 2 October 2026, not tax advice. Whether an activity is trading is ultimately HMRC's call on the facts, and borderline cases, non-UK residents, partnerships and creators paid through their own company are outside what this page can settle. Penalty outcomes depend on HMRC's view of your behaviour and disclosure, so the ranges above describe the system rather than predict your result.
If you are unsure whether you crossed the line, or you are registering for several years at once, speak to a qualified accountant or tax adviser before you file. Bring a month-by-month record of gross income, gifts included; our OnlyFans earnings tracker template is a ready-made structure for it.