Adult Creator Accountants

OnlyFans and Self Assessment

Written and reviewed by the Adult Creator Accountants editorial team. Last reviewed 29 July 2026.

Self Assessment is the system through which you report your OnlyFans income to HMRC and pay the tax on it. If your gross income from the platform is more than the £1,000 trading allowance, you are within it. The process is manageable once you know the deadlines and what goes where.

This page walks through registering, the key dates, the pages you complete and the payments on account that can catch first-time filers by surprise.

Registering for Self Assessment

Before you can file, you have to register for Self Assessment. The deadline to register is 5 October following the end of the tax year in which you started, so if you began earning in one tax year you register by the October that follows it. Registering gives you the Unique Taxpayer Reference you need to file.

Leaving registration late is a common and avoidable mistake, so it is worth marking the 5 October date as soon as you pass the trading allowance.

The Filing and Payment Deadlines

There are three dates to hold in mind for each tax year. A paper return must be filed by 31 October. An online return must be filed by 31 January. The balancing payment, meaning the tax you owe for the year, is due by 31 January. Missing these can bring penalties and interest, so the online filing and payment date of 31 January is the one most people work to.

Most creators file online, which gives the later deadline and does the calculation for you as you go.

Which Pages You Complete

OnlyFans income goes on the self-employment pages of the return. Most creators use the short self-employment pages, SA103S, while those with more complex affairs or higher turnover use the full version, SA103F. These sit alongside the main return and capture your turnover, your expenses and the resulting profit.

Expenses you enter here must meet the usual test of being incurred wholly and exclusively for the business, the same standard set out for allowable expenses.

Payments on Account

Payments on account are advance payments towards your next year's tax, and they surprise a lot of first-time filers. They are required where your tax bill for the previous year is £1,000 or more, unless more than 80% of your tax was already collected at source. Where they apply, you make two instalments, on 31 January and 31 July, each of them 50% of the previous year's tax.

The effect in your first year of a larger bill can be that you pay one and a half years of tax at once: the balancing payment for the year just gone plus the first payment on account for the year ahead. Knowing this in advance lets you set the money aside rather than be caught out.

Records and Expenses to Keep

Good records make the return quick and the figures defensible. Keep a note of the payments you receive from the platform, which form your turnover, and the costs you intend to claim, with the evidence behind them. The better the records, the less the return costs you in time or in tax paid unnecessarily.

If you would rather not handle it yourself, our Self Assessment service for creators prepares and files the return for you, and the tax it calculates follows the same rates set out in how OnlyFans income is taxed.

Common questions

When do I need to register for Self Assessment?

By 5 October following the end of the tax year in which you started earning above the trading allowance. Registration gives you the Unique Taxpayer Reference you need to file, and registering late can lead to penalties.

What are the filing and payment deadlines?

A paper return is due by 31 October, an online return by 31 January, and the balancing payment for the year by 31 January. Most creators file online to get the later deadline.

What are payments on account?

They are advance payments towards the next year's tax, required where your previous year's bill was £1,000 or more, unless over 80% of your tax was collected at source. You pay two instalments, on 31 January and 31 July, each 50% of the previous year's tax.

Which pages of the return do I use?

The self-employment pages: SA103S if your affairs are straightforward, or the full SA103F for more complex or higher-turnover cases. They record your turnover, expenses and profit.

Tell Us Roughly What You Earn and We Will Quote

Tell us roughly what you make, on OnlyFans or any other platform, whether you are a sole trader or a limited company, and what you need: the Self Assessment, the VAT question, or the whole thing kept clean all year. We come back with a fixed fee and the dates that apply. Everything is handled in confidence, and if your position is simple we will say so rather than quote for a full package.

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