Self Assessment Tax Returns for Company Directors: Everything You Need to Know (2025/26)

Running a limited company comes with two sets of responsibilities: those related to the business and those related to your personal tax. Filing annual accounts at Companies House and paying Corporation Tax covers the company, but your own income, salary, dividends, benefits, or loans are separate. This is where many directors get caught out.

If you take dividends, borrow from the company, receive director benefits, or earn income that isn’t fully taxed through PAYE, HMRC generally expects you to complete a Self Assessment tax return. Many directors assume their accountant has handled everything or believe that being on a small PAYE salary means no further action is required. Unfortunately, this can lead to late-filing penalties, interest charges, and complications with HMRC.

This guide is updated for the 2025/26 tax year and gives directors a clear roadmap for Self Assessment: who must file, how to register, what to report, and how to stay compliant. Most importantly, it explains the key distinction: Self Assessment is about your personal income, not your company’s tax.

Do All Directors Need to File a Self Assessment?

Most company directors in the UK are required to file a Self Assessment return. HMRC expects directors to report any personal income that is not fully taxed through PAYE, even if the salary appears straightforward.

You usually need to file if you:

Exceptions for Directors

Some directors may not need to file if all of the following apply:

Why Directors Usually Have to File a Self Assessment

Directors' files are not filed because of their role, but because of the types of income or benefits they receive beyond a simple PAYE salary. Common triggers include:

Dividends

Benefits in Kind

Director’s Loans

Other Untaxed Income

Registration & Deadlines for 2025/26

Even if your company accounts are up to date, your personal Self Assessment obligations must also be met.

Registering for Self Assessment

Key Deadlines

Penalties for Late Filing or Payment

What Directors Need to Report in Their Self Assessment (2025/26)

1. Salary (PAYE)

Even if fully taxed at source, include your salary in the return. Additional tax may be due if other income pushes you into a higher tax band.

2. Dividends

Include all dividends from your company or other investments. Remember the additional requirements for close companies in 2025/26.

3. Benefits in Kind

Include taxable benefits such as company cars, medical insurance, phone/broadband, and reimbursed personal expenses. Usually reported via P11D.

4. Director’s Loan Account

Report overdrawn loans, repayments, and any Section 455 tax or beneficial loan interest.

5. Other Income

Rental income, self-employment profits, interest, foreign income, capital gains, and cryptoasset gains must be included.

Keeping accurate records ensures HMRC can reconcile your personal return with company filings.

How to Complete a Director’s Self Assessment: Step by Step

Filing a Self Assessment may seem daunting, but breaking it into simple steps makes the process manageable. Follow these steps to stay compliant:

Step 1: Gather Your Records

Before you start, make sure you have all relevant documents:

Accurate records are the foundation of a correct return.

Step 2: Register for Self Assessment

If this is your first time filing:

If you are already registered, check that your login details are up to date.

Step 3: Complete Your Online Tax Return

Most directors file online. Key sections to complete include:

Make sure all figures match your company’s records to avoid HMRC queries.

Step 4: Review & Submit

Step 5: Pay Any Tax Due

Late payment or filing triggers penalties and interest, so pay on time.

Step 6: Keep Records

HMRC requires that you keep records for at least 5 years after the filing deadline. Include:

Proper records allow you to respond quickly if HMRC queries your return.

This step-by-step guide ensures directors can file their Self Assessment accurately, on time, and in full compliance with the 2025/26 rules.

Conclusion

Filing a Self Assessment as a company director is about your personal tax, not your company’s tax. It requires reporting all income beyond PAYE, including dividends, benefits, director’s loans, and other untaxed income. Staying compliant means understanding your obligations, registering on time (by 5 October 2026 for new directors), meeting key deadlines (filing and payment by 31 January 2027), and keeping accurate records for at least five years. By carefully reviewing all figures and maintaining proper documentation, directors can avoid late filing penalties, interest charges, and HMRC enquiries, while ensuring their personal tax affairs are fully accurate. With the right preparation and organisation, Self Assessment becomes a straightforward process, allowing directors to meet their obligations with confidence and focus on running their business.