OnlyFans asks for a tax identification number because, as its Tax Policy explains, some countries require it to collect, verify and report creators' identity and earnings details, and where your country of residence requires a tax ID you cannot withdraw Creator Earnings without one. The number to enter is the one issued by the country where you live. For UK residents, GOV.UK's guidance on selling goods or services on a digital platform names the National Insurance number, not your Unique Taxpayer Reference; other countries use a different identifier, listed in the table below.
This page covers the tax ID field only. Identity checks are a separate step, explained in our guide to OnlyFans identity verification, and US creators completing a W-9 will find the wider picture in our OnlyFans taxes and deductions guide. Sources were checked on 1 October 2026.
Why the platform needs your number
OnlyFans' Terms of Service name its operator as Fenix International Limited, a company registered in England and Wales, so UK rules are the natural place to start. GOV.UK says new rules began on 1 January 2024 under which digital platform operators may need to collect and check details about sellers and report them to HMRC. For an individual that means full name, home address, date of birth and tax identification number, plus the country that issued it; the platform reports each calendar year by the following 31 January and must give you a copy.
HMRC's manual page on the tax identification number (IEIM902330) explains the logic. The number is the most useful item for matching a platform's report to the records a tax authority holds, so it must be issued by the jurisdiction where your primary address is. GOV.UK adds that HMRC shares the information with your country's tax authority if you live in another country that follows these rules. Canada runs a parallel regime: the CRA's page on what information is shared says it may assess a $500 penalty for each failure to give your TIN to a platform operator.
On OnlyFans itself the consequence is practical. The Tax Policy says that failing to provide required tax information may restrict account functionality, including the ability to withdraw earnings, and that you are responsible for keeping your tax and contact details accurate and up to date.
Country-to-identifier table
Formats come from the country sheets on the OECD tax identification numbers portal, which HMRC's manual points platforms to, and from the tax authorities linked in each row. The platform's own form may label its fields differently.
| Where you live | Individual creator | Paid through a company or other entity | Official format |
|---|---|---|---|
| United Kingdom | National Insurance number, per HMRC's IEIM902330 | Company registration number for a UK company; partnership UTR for a general partnership | Two letters, six numbers and a suffix letter A, B, C or D, per the OECD UK sheet |
| Australia | Tax file number, which the OECD sheet describes as Australia's TIN | Australian Business Number, which businesses use as their single identifier with the ATO | TFN of eight or nine digits; ABN of 11 digits with two check digits, per the OECD Australia sheet |
| United States | Social Security Number, or an ITIN if you cannot get one, given on the W-9 the Tax Policy mentions | Employer Identification Number | SSN xxx-xx-xxxx, ITIN starting with 9, EIN xx-xxxxxxx, per the OECD US sheet |
| Canada | Social Insurance Number, which the CRA lists as a Canadian TIN | Business Number; trusts use a trust account number | Nine-digit SIN or BN; the OECD Canada sheet says the program account part of a BN need not be disclosed for reporting |
| New Zealand | IRD number issued by Inland Revenue | The entity's own IRD number | Eight or nine digits, often padded with a leading zero, per the OECD New Zealand sheet |
| Ireland | Personal Public Service Number | Tax Reference Number issued by the Revenue Commissioners | Seven digits followed by one or two letters, per the OECD Ireland sheet |
| Any other country | The identifier your own tax authority issues to individuals | The entity identifier from the same authority | Open that country's sheet on the OECD portal before typing anything |
The HMRC manual also covers the edge cases. If your country does not issue a TIN, or does not require one to be collected, the platform is not obliged to collect it and records that none was given. If you live in the UK and have no National Insurance number yet, you apply for one, and the manual says a platform may register you while you wait.
“Format is invalid”: troubleshooting checklist
Work down the list in order. Most rejections come from entering a real number of the wrong type, not from a typo.
- UK residents: count the characters. A National Insurance number has nine: two letters, six digits and a final A, B, C or D. If spaces are rejected, type it as one block, as the OECD example does.
- Do not enter your UTR. It is ten numerals, and HMRC's manual says platforms should not routinely ask individuals for it.
- Do not enter your VAT number in the tax ID field. HMRC says a VAT registration number is not a substitute for a National Insurance number or company number; it has a separate place on OnlyFans.
- Check you are not using a PAYE temporary reference number, which the OECD UK sheet describes as two numerals, one letter and five numerals.
- Match the issuing country to the country of your primary address. A number from a country you have moved away from will not match your profile.
- Match the account type to the number: a UK company gives its company registration number, never a director's National Insurance number.
- Australians: a single transposed digit can fail, because the TFN uses a check-digit algorithm and the ABN has two check digits designed to catch transpositions.
- US residents: an ITIN always starts with 9, an EIN uses a two-then-seven digit pattern, and an SSN uses three, two and four.
- Canadians: enter the nine-digit Business Number root without the program account letters and digits unless the form asks for them.
- New Zealanders: try the nine-digit version with a leading zero if an older eight-digit IRD number is rejected.
- Make sure the legal name and date of birth match the identity you verified, because platforms must check that the details they collect are reliable.
- Still stuck: contact OnlyFans support, the address its Tax Policy gives for tax questions, and never borrow or invent a number.
Where the number goes and what you get back
GOV.UK's page for operators on how to collect and verify seller information lists what is reported alongside your identity: other tax numbers such as a VAT number where available, the total paid to you in each quarter after deductions, fees, commissions or taxes withheld, the number of transactions, and the bank account the money went to. It also says a platform may temporarily limit a seller's access until correct information is provided.
The copy you receive shows the calendar-year total less fees, broken into quarters. GOV.UK stresses that a report does not automatically mean you owe tax and does not replace your own records, and you still need tax-year figures for a UK return. The exemption for sellers with fewer than 30 sales and under 2,000 euros is written for sales of goods, so creators should not assume it covers subscription income. Keep the copy with that year's tax records, and if its totals differ from your own statements, ask the platform to explain the gap before you file rather than after. In Canada the CRA says platforms send sellers their copy by January 31; our Canadian creator tax checklist covers what to do with it.
A note for Australian creators on the TFN
The ATO's page What is a tax file number? calls your TFN an important part of your identity and says to disclose it only to people and organisations that need it for legitimate reasons, giving examples such as the ATO, your employer, your bank, government agencies, your super fund and your university. The OECD Australia sheet adds that under Australian law a person cannot be compelled to have a TFN or to quote it, while noting that the ABN is visible to anyone through the public Australian Business Register.
Put together, those sources leave a real question rather than a simple instruction. Before typing a TFN into an overseas platform, ask OnlyFans support why the field is required for Australian residents and ask your registered tax agent whether your TFN or ABN is the right entry. None of the ATO's examples are managers, chatters or agencies, so a TFN should never be shared with them.
Other platforms ask in different ways
The same rules surface as different forms elsewhere. Fansly uses a W-8BEN or W-8BEN-E, a DAC7 form, a Canadian platform form or a W-9 depending on where you live, explained in our Fansly tax forms guide. Fanvue runs a tax interview leading to a W-9, W-8BEN or W-8BEN-E and has its own VAT field, covered in our Fanvue tax forms and VAT guide. UK creators who also register for VAT give that number separately, as our UK VAT guide for creators explains.
Limits of this explainer
This is general information from OnlyFans' published policies, GOV.UK, HMRC's manual, the CRA, the ATO and OECD country sheets as they read on 1 October 2026, not tax or legal advice. OnlyFans does not publish the exact validation rules its form applies, so the checklist reflects official number formats rather than the platform's code, and the fields you see may differ by country. The OECD sheets were written for financial account reporting and some date back years. This page also cannot say which reporting regime covers your account in your country.
If your situation involves more than one country, a company, or a number you are unsure about, check with a registered tax agent or accountant where you live before you submit the form.