Self Assessment for Directors: A Comprehensive Guide

If you’re a company director in the UK, your tax responsibilities are slightly more complex than those of a typical employee. Even if you pay yourself through PAYE, you’ll usually still need to file a Self Assessment tax return each year.

Understanding what’s required, what income must be declared, and how to avoid common mistakes can save you time, money, and unnecessary stress.

In this guide, we’ll explain everything you should know about Self Assessment for directors, including registration, filing deadlines, allowable expenses, dividends, and compliance requirements.

Key points

• Most directors have to file a Self Assessment 🧑‍💼
  Even if your salary is taxed through PAYE, directors usually need to submit a return if they receive dividends, property income, and capital gains, or if they need to claim tax reliefs.
• All taxable income must be declared ✅
  You must declare salary, dividends, benefits in kind, rental income above the Rent a Room allowance, capital gains, director’s loan interest, savings and investment income, and pensions.
• You can reduce your tax liability through reliefs 📉
  Personal reliefs such as pension contributions, charitable donations, marriage allowance, and professional subscriptions can reduce your tax liability. However, company expenses that are already reimbursed cannot be claimed personally.
• Deadlines and registration are critical 📅
  Register with HMRC by 5 October if you’re filing for the first time. Key dates include 31 October for paper returns, 31 January for online returns and tax payments, and 31 July for the second payment on account. Late filing triggers automatic penalties.
• Digital record-keeping simplifies filing 🖥️
  Maintaining organised records of dividends, salaries, loans, and expenses, ideally using digital tools, makes completing the Self Assessment easier and reduces the risk of errors.
• Planning ahead saves tax and stress 📝
  Accurate reporting, monitoring dividends and benefits, and understanding reliefs can help directors manage tax efficiently and avoid last-minute complications.

Do company directors need to file a Self Assessment?

In most cases, yes.

Being a company director automatically puts you on HMRC’s radar. Even if your salary is taxed through PAYE, you’ll usually be required to submit a Self Assessment tax return if you:

• Receive dividends from your company
• Have untaxed income
• Earn more than £100,000
• Receive income from property
• Have capital gains to report
• Need to claim certain tax reliefs

When in doubt, it’s safer to confirm your position with HMRC or an accountant rather than assume you don’t need to file.

Why are directors treated differently?

A company director is legally responsible for running a limited company. Even if you’re the sole director and shareholder, you aren’t considered self-employed. Your company is a separate legal entity.

This creates two layers of taxation:

• The company pays Corporation Tax on its profits
• You pay personal tax on the income you receive from the company

Your personal tax return refers to your individual income, not the company’s profits directly.

What income must directors declare?

Your Self Assessment must include all taxable income for the tax year, not just income from your company.

1. Salary

Most directors pay themselves a salary through PAYE. This salary is processed through the company payroll, and Income Tax and National Insurance contributions are deducted automatically.

Even though the tax has already been paid through PAYE, you must still report:

• Total gross salary for the tax year
• Income Tax deducted
• Employee National Insurance contributions

You’ll normally find these figures on your:

• P60 (issued after the end of the tax year), or
• P45 (if you stopped being paid during the year).

If you receive salary from more than one source, for example, your company and another employer, all employment income must be declared.

2. Dividends

Dividends are payments made to shareholders from company profits after Corporation Tax has been paid. Unlike salary, dividends aren’t subject to National Insurance, but they are subject to Dividend Tax.

Why dividends must be declared

Dividends aren’t taxed at source. This means HMRC doesn’t automatically deduct tax before you receive them. Instead, you declare them via Self Assessment, and HMRC calculates the tax due.

The dividend allowance

For the 2024/25 tax year, the first £500 of dividend income isn’t taxed, but it still counts towards your total income.

Dividends above the allowance are taxed according to your Income Tax band, and the rate you pay depends on your total taxable income.

Keep in mind that:

• Dividends must be properly declared by the company
• Dividend vouchers should be issued and retained
• Only profits can legally be distributed as dividends

If you withdraw money from the company without declaring dividends properly, it may be treated as a director’s loan instead, which can create additional tax complications.

3. Benefits in kind

Benefits in kind are non-cash perks provided by your company. Even though you don’t receive money directly, these benefits can still be taxable.

Common examples include:

• A company car
• Fuel provided for private use
• Private medical insurance
• Interest-free or low-interest loans
• Living accommodation
• Gym memberships
• Certain subscriptions

Company cars, for example, are one of the most heavily taxed benefits. The taxable value depends on:

• The car’s list price
• Its CO2 emissions
• The type of fuel
• Whether private fuel is provided

Electric vehicles often attract lower benefit-in-kind tax rates compared to petrol or diesel vehicles.

How benefits are reported

Most benefits are reported by your company on a P11D form after the end of the tax year. The taxable value of the benefit is then included in your Self Assessment return.

Some benefits may be ‘payrolled’, meaning the tax is collected through PAYE during the year. Even so, you may still need to declare them depending on your circumstances.

For example, if your employer provides private medical insurance worth £600 per year, this benefit is taxable. HMRC will include the £600 in your Self Assessment return, or, if you are payrolled, the tax will be deducted automatically from your salary.

4. Rental income

If you personally own property that generates rental income, this must be reported on your Self Assessment tax return.

This applies whether you own residential property, let out commercial premises, or rent out a room in your home that exceeds the Rent a Room tax-free allowance of £7,500 per year.

You must declare:

• Total rental income received
• Allowable expenses
• Mortgage interest (subject to current relief rules)

Allowable expenses can include:

• Letting agent fees
• Maintenance and repairs
• Insurance
• Council Tax
• Utility bills

It’s important to distinguish between personal property income and property owned by your limited company. If the company owns the property, it’s taxed under Corporation Tax instead, and you wouldn’t declare it personally unless you extract funds.

For directors who rent a property they personally own to their own company, the rent must be set at a fair market rate. The income is treated as personal rental income, so it still needs to be reported on your Self Assessment. This ensures HMRC treats the arrangement correctly and avoids any benefit-in-kind or tax issues.

5. Capital gains

If you sell or dispose of certain assets, you may need to report Capital Gains Tax (CGT) through Self Assessment.

Common examples include:

• Selling shares in a company
• Selling investment property
• Disposing of valuable assets
• Selling your business

Keep in mind that Capital Gains Tax is charged on the profit made when you dispose of the asset, not the total sale price.

The annual exempt amount

Directors, like all individuals, have a Capital Gains Tax (CGT) allowance of £6,000 (2025–26). Gains above this are taxable.

The rate you pay depends on:

• Your total taxable income
• The type of asset sold

Property gains are usually taxed at different rates (18% if you are a basic-rate taxpayer or 28% if you are a higher-rate or additional-rate taxpayer).

Business Asset Disposal Relief

If you sell shares in your own trading company, you may qualify for Business Asset Disposal Relief (BADR), which reduces the Capital Gains Tax rate on qualifying gains to 10%, rather than the standard higher rate of 20%.

To qualify, you must have held at least 5% of the company’s shares and voting rights for at least two years before the sale. Also, the company must be a genuine trading business rather than an investment vehicle.

This relief is particularly valuable for directors planning to exit their company, as it can significantly reduce the tax payable on the sale of their shares.

6. Director’s loan interest

If you lend money to your company and receive interest, that interest counts as personal income and must be declared on your Self Assessment tax return. It’s usually taxed as savings income.

On the other hand, if your company lends money to you, for example, through a Director’s Loan Account, and charges no interest or a below-market rate, this can create a taxable benefit in kind.

The company may also face additional Corporation Tax charges if the loan isn’t repaid within nine months after the end of the company’s accounting period.

Because Director’s Loan Accounts can trigger both personal and corporate tax liabilities, they should be reviewed and reconciled regularly.

7. Savings and investment income

Your Self Assessment must also include:

• Bank and building society interest
• Interest earned on personal loans
• Dividends from non-company investments
• Income from overseas sources

Although banks and financial institutions may share information with HMRC, you remain legally responsible for declaring all taxable income accurately. Even small amounts of interest can affect your overall tax position, especially if you’re close to a higher tax band.

What about ISAs?

Interest, dividends, and capital gains from Individual Savings Accounts (ISAs) are completely tax-free. You don’t need to declare any income from cash ISAs, stocks and shares ISAs, or Lifetime ISAs on your Self Assessment, and they don’t count toward your taxable income. This makes ISAs a useful way to save or invest without affecting your tax position.

8. Pension income

If you receive pension income alongside your earnings, it also has to be declared. This includes:

• State Pension
• Private pensions
• Workplace pensions

State Pensions aren’t taxed at source, which means that the funds you receive are fully taxable. Private and workplace pensions may have tax deducted before payment, but they still need to be reported on your tax return so HMRC can calculate your total liability correctly.

Allowable expenses and reliefs

As a director, you may be able to claim certain personal reliefs on your Self Assessment return, even though your company already claims business expenses against Corporation Tax.

These may include:

• Pension contributions
• Charitable donations under Gift Aid
• Marriage Allowance claims
• Professional subscriptions

Also, if you have personally incurred allowable expenses that weren’t already reimbursed by the company, you may be able to claim relief. This can include costs such as travel and mileage, office supplies, training fees, or work from home expenses.

Registering for Self Assessment

If you have never filed a Self Assessment before, you must register with HMRC by 5 October following the end of the relevant tax year.

For example, if you became a director and started receiving dividends in the 2024/25 tax year, you must register by 5 October 2025 because the tax year ends on 5 April 2025.

Once registered, HMRC will issue you with:

• A Unique Taxpayer Reference (UTR)
• Instructions for setting up your online account

Missing the registration deadline can lead to penalties, so it’s important to act promptly.

The key deadlines

The UK tax year runs from 6 April to 5 April of the following year. The main Self Assessment deadlines are:

• 5 October: Registration deadline for Self Assessment (if this is your first return or HMRC has asked you to file)
• 31 October: Deadline for submitting a paper tax return, if you choose to file physically
• 31 January: Deadline for submitting an online tax return and paying any tax you owe for the previous tax year
• 31 July: Deadline for the second payment on account, if applicable

Filing late triggers automatic penalties, starting at £100, even if you don’t owe any tax. Additional charges and interest can accrue for continued delays, so staying organised and submitting on time is crucial for avoiding unnecessary costs.

Digital record-keeping and Making Tax Digital

If, in addition to your director’s income, you also have property or self-employment income, you should be aware of the upcoming Making Tax Digital (MTD) changes. Those who qualify will need to keep digital records of their income and allowable expenses, categorise transactions, submit quarterly updates to HMRC, and complete a final year-end declaration.

MTD currently applies only to business and property income, not to dividends or salary. Still, directors should ensure:

• Dividend records are accurate
• Salary records match PAYE submissions
• Loan accounts are reconciled
• Expenses are properly categorised

The best way to do this is through digital tools, as they can reduce errors, improve visibility, and help you estimate your tax liability throughout the year.

How ANNA can help with Self Assessment for directors

Managing a company and keeping track of income, dividends, and tax deadlines can quickly become overwhelming. ANNA simplifies this process by bringing your business account, bookkeeping, and tax administration into one place.

With ANNA, directors can:

• Track income and expenses automatically – All payments, invoices, and expenses are recorded in real time, making it easier to calculate taxable income.
• Monitor tax liabilities throughout the year – ANNA gives clear visibility of how much income tax, dividend tax, and National Insurance you may owe, so there are no surprises at filing time.
• Keep accurate records for dividends, loans, and benefits – Digital records ensure your Self Assessment return is complete and supported by evidence if HMRC asks questions.
• Automatically calculate and file Company Accounts and Corporation Tax – ANNA prepares and submits your company filings, reducing reliance on external accountants and lowering the risk of errors.
• Manage invoicing and cash flow seamlessly – Create and send invoices, track payments, and match transactions automatically, all within your built-in UK business account.
• Set aside money for tax automatically – Smart tax pots reserve a percentage of your income, helping you avoid last-minute cash flow pressure when payments are due.
• Stay organised with reminders and alerts – ANNA helps you meet Self Assessment deadlines, including registration, filing, and payments on account.

ANNA reduces admin, prevents mistakes, and makes Self Assessment far less stressful for company directors. Instead of scrambling at the last minute, you can manage your tax position in real time and focus on growing your business.

To take advantage of all these benefits, sign up with ANNA today.