Self Assessment for Company Directors: Do You Need to File?

Reviewed by the Limited Company Accountant UK team. Figures are for the 2026-27 tax year unless stated.

Yes, almost every UK limited company director has to file a Self Assessment tax return, even when the company already pays them through payroll. The main exceptions are unpaid directors of non-profit organisations. For the 2025-26 tax year, the online return and any tax due must reach HMRC by 31 January 2027.

Do all company directors have to file Self Assessment?

HMRC’s position is simple: if you are a director of a limited company, you must send a Self Assessment tax return unless you fall into a narrow exemption. That applies if you own the company, if you are one of several directors, and if you have only just been appointed. It also applies when your company is tiny, trades at a loss or has not paid you a penny.

The reason is that the company and you are separate taxpayers. The company files a CT600 and pays Corporation Tax on its profits. You, as an individual, owe Income Tax and National Insurance on what you take out of it, plus tax on any other income. Self Assessment is the system HMRC uses to calculate that personal bill.

Many new directors assume that because the company runs payroll, the job is done. PAYE does cover tax on salary, but it does not capture dividend tax, benefits in kind that were not payrolled, rental income, savings interest above your allowances or capital gains. Those all land on the Self Assessment return.

Who does not need to file?

The exemptions are limited. You may not need to file if you are a director of a non-profit organisation such as a charity or club and you receive no pay or benefits. You might also be exempt if the only thing you receive from the company is payrolled income that is fully taxed under PAYE and you have no other untaxed income. In practice this describes very few owner-managed companies.

If you are unsure, assume you must file and check with your accountant or the GOV.UK guidance for directors. The penalty for getting it wrong is far larger than the cost of a few minutes of checking. If you want a deeper look at how pay works, read our guide on how to pay yourself from a limited company.

What goes on a director’s Self Assessment return?

A typical director’s return has several parts. You do not need to fill in every section; HMRC’s online form only shows the pages you tick as relevant.

• Employment income: salary from your own company, taken from your P60 or final payslip.
• Dividends: the total dividends you received in the tax year, found on your dividend vouchers.
• Benefits in kind: company car, private medical cover or any benefit reported on a P11D.
• Savings interest: interest from banks and building societies.
• Other income: rental income, freelance income, foreign income.
• Reliefs and payments: personal pension contributions, Gift Aid donations, Child Benefit charge and student loan repayments.

If your company has an overdrawn director’s loan account, that can create a benefit in kind and a tax charge for the company too. See our explainer on director’s loan accounts and Section 455 tax.

Key dates for the 2025-26 tax year

The 2025-26 tax year ran from 6 April 2025 to 5 April 2026. These are the dates that matter.

Date	What happens
5 October 2026	Deadline to register for Self Assessment if you were new to it
31 October 2026	Paper return deadline (most people file online instead)
31 January 2027	Online return deadline and payment of any balancing tax
31 January 2027	First payment on account for 2026-27, if applicable
31 July 2027	Second payment on account for 2026-27

Our director tax calendar shows these alongside your company’s own deadlines so nothing slips.

How dividends change your tax bill

Dividends are the main reason directors owe tax through Self Assessment. Every taxpayer has a £500 dividend allowance. Above that, dividends are taxed at 10.75% within the basic rate band, 35.75% in the higher rate band (income above £50,270) and 39.35% above £125,140. Because the company pays dividends out of profits that have already borne Corporation Tax, there is no tax deducted at source, so the bill is yours to calculate and pay.

Many directors are surprised by the size of the January payment the first time, especially when the first payment on account lands as well. You can model your likely bill in advance with our dividend tax calculator and compare salary and dividend combinations in the salary vs dividend calculator.

Registering for Self Assessment and getting your UTR

If you have never filed before, you need to register with HMRC. You will be sent a 10-digit Unique Taxpayer Reference (UTR) by post, which can take up to around 10 working days, and an activation code for your online account. Do not leave this until January. The registration deadline is 5 October following the end of the tax year in which you first needed to file, and leaving it late can mean a delayed activation code and a missed filing deadline.

If you are setting up a company as well, our limited company accounting for beginners guide walks through the full set of registrations.

Penalties for filing late

HMRC applies penalties automatically, whether or not you owe tax. The standard pattern is a £100 fixed penalty one day after the deadline, daily penalties of £10 for up to 90 days after three months, and further charges of the greater of £300 or 5% of the tax due at six and twelve months. Late payment adds interest and further percentage charges at 30 days, six months and twelve months. Check the current penalty and interest rates on GOV.UK before relying on any figure, as HMRC can update them.

You can appeal a penalty if you had a reasonable excuse, but a busy diary or software problems close to the deadline rarely qualify. The practical answer is to file early.

Common mistakes directors make

• Assuming the company accountant has filed your personal return when only the company accounts were done.
• Leaving out dividends because the company already paid Corporation Tax.
• Forgetting the tax on a benefit in kind or an overdrawn loan account.
• Not setting aside cash for the January bill, so they are forced to borrow to pay HMRC.
• Keeping poor records of dividends, which makes the return harder to prepare accurately.

A simple fix is to move around 20-30% of each dividend into a savings pot at the time you take it. That way the money is there when the tax falls due.

How an accountant makes this easier

An accountant who looks after both the company and your personal return can reconcile the two so that the salary, dividends and benefits on your return match what the company recorded. They will also check you are claiming reliefs such as pension contributions properly, and plan your pay for next year. Our fixed monthly packages start at £45.83 + VAT, and the personal tax return is straightforward to add.

Frequently asked questions

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