The change applies from the 2025/26 tax year, so it will affect tax returns being prepared and submitted between now and 31 January 2027.
For most owner-managed businesses, the additional information should be relatively straightforward. However, it is important to be aware of the change.
Who is affected?
The new rules apply to directors of “close companies” who are required to submit a Self-Assessment tax return.
Despite the terminology, there is nothing unusual about a close company. Broadly, it is a UK company controlled by five or fewer people, or by its directors. Most small family and owner-managed companies will fall within this definition.
Importantly, the new rules do not mean that being a company director automatically requires you to submit a tax return. They apply where you already need to submit one.
What additional information has to be provided?
If you are a director of a close company, your tax return will now need to identify the company and provide:
• the company name;
• its Companies House registration number;
• the dividends you received from that particular company during the tax year; and
• your percentage shareholding in the company.
If your shareholding changed during the year, the return should show the highest percentage held during that tax year. HMRC's guidance says that the percentage is calculated by reference to the nominal value of the shares.
A simple example
Suppose you and your spouse own and run a family trading company.
Previously, your tax return would report your dividend income, but it did not require the same compulsory detailed disclosure linking those dividends, your shareholding and the particular close company.
Under the new requirements, your return will specifically identify the company, its registration number, the dividends you received from it and your percentage shareholding.
In other words, HMRC will receive more structured information connecting the director personally with the company they own and manage.
What if you received no dividends?
This is an important point.
The disclosure requirements can still apply even if you received no dividends from the company or do not own any shares in it. In those circumstances, the relevant figures are entered as zero.
HMRC has also confirmed that the requirements can apply to unpaid directors and directors of dormant close companies. There are specific exceptions for certain unpaid directors of charities and Community Interest Companies.
Why has this changed?
The effect of the new rules is to give HMRC more detailed information about the relationship between individuals and the close companies of which they are directors.
In particular, rather than simply seeing an individual's overall UK dividend income, the new information identifies the dividends received from the particular close company and the individual's shareholding in it.
For the typical owner-manager, this does not create a new tax charge. It is a new reporting requirement.
What do you need to do?
For most clients, very little should change in practice. However, when we prepare your 2025/26 Self-Assessment tax return, we may need to confirm:
• all close companies of which you were a director during the year;
• your shareholding in each company, including any changes during the year; and
• the dividends you received from each company.
This is particularly important if you are a director or shareholder of more than one family or owner-managed company, as the required information applies separately to each relevant company.
The key point
If you own and run a limited company, your 2025/26 personal tax return may require more detailed information about your involvement with that company than in previous years.
For most owner-managers this should simply mean providing some additional information when we prepare the return, rather than any change to the amount of tax they pay.





















