Self-Assessment Tax for Directors: What You Need to Know
Chrissy Leach • 27 October 2025
Running your own limited company gives you flexibility and control, but it also comes with a few extra responsibilities, especially when it comes to tax.
If you’re a company director, you’ll likely need to complete a Self Assessment tax return each year. But what exactly does that mean, why do you need to do it, and how can you make sure you get it right?
In this guide, we’ll walk you through everything you need to know about Self Assessment for directors - including deadlines, what to include, and how to avoid common mistakes.
Do Company Directors Need to File a Self Assessment Tax Return?
In most cases, yes.
HMRC requires a Self Assessment tax return if you receive income that hasn’t already been taxed at source. As a company director, you’re usually paid in a combination of:
- A salary through PAYE, and
- Dividends from company profits.
Even if you take a small salary below the tax threshold, your dividends could still make you liable for income tax so HMRC expects a return to be filed.
You must file a tax return if:
- You’re a company director and you receive dividends or other income outside of PAYE.
- You earn more than £10,000 in dividends during the tax year.
- You have untaxed income such as rental income, investments, or freelance work.
When Is the Self Assessment Deadline for Directors?
The deadlines are the same for everyone who files a Self Assessment:
- 5 October: Register for Self Assessment (if you haven’t filed before).
- 31 October: Deadline for paper returns (rarely used now).
- 31 January: Deadline for online filing and for paying any tax owed.
The tax year runs from 6 April to 5 April, so your 2024/25 tax return will be due by 31 January 2026.
Missing the deadline can lead to penalties, even if you don’t owe any tax, so it’s best not to leave it to the last minute.
What Should Directors Include in Their Tax Return?
You’ll need to declare all your income for the year, including:
- Salary paid via PAYE
- Dividends from your company
- Interest from savings or investments
- Rental income (if applicable)
- Any other untaxed income
You can also claim personal allowable expenses and reliefs, such as:
- Charitable donations under Gift Aid
- Pension contributions
- Certain professional fees or subscriptions
Your company accounts will already cover business income and expenses, but your Self Assessment focuses on your personal income and tax liabilities.
How Much Tax Will I Pay as a Director?
The tax rates and thresholds are the same for everyone. You'll pay:
- Income Tax on your salary and dividends, and
- National Insurance on your salary (if above the threshold).
Your salary will be taxed via PAYE, but dividends and other income are taxed through your Self Assessment.
What Happens If You Don’t File?
HMRC can issue penalties for late filing, even if you don't owe any tax. There are also late payment penalties and interest charges if you pay your tax late.
How an Accountant Can Help
Completing your Self Assessment can feel daunting, especially if you’re juggling payroll, VAT, and company accounts too.
At CJL Accountancy, we help directors file accurately and on time, ensuring:
✅ All income and dividends are correctly reported
✅ You don’t overpay tax
✅ You meet every deadline stress-free
We also offer proactive tax planning to help you structure your income in the most tax-efficient way for the future.
Common Questions About Self Assessment for Directors
Q: Do all directors need to file a tax return?
A: No. If you only received salary and benefits then that will be taxed through PAYE, but anything else will likely need a tax return.
Q: Can HMRC automatically collect my tax through PAYE?
A: Only for your salary - dividends and other income must go through Self Assessment.
Q: When should I register?
A: By 5 October following the end of the tax year when you became a director or started receiving dividends. But if you've missed that for 2024/25, register as soon as possible.
Q: What if my accountant files on my behalf?
A: You’re still legally responsible for ensuring it’s correct and submitted on time, but a qualified accountant makes the process much smoother.
Need Help Filing Your Director’s Tax Return?
At CJL Accountancy, we specialise in helping limited company directors with Self Assessment, dividends, and year-end planning.
We’ll handle the figures so you can focus on running your business.
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