3.2 Million Small UK Companies Must File Profit & Loss Accounts from April 2028

Major Filing Changes Announced

The UK government has confirmed that small companies and micro-entities will need to file profit and loss accounts with Companies House^[1] from April 2028, marking a significant shift in corporate reporting requirements. The changes, announced on 9 June 2026, form part of the Economic Crime and Corporate Transparency Act 2023 reforms designed to improve transparency and tackle economic crime.

Under the new rules, all companies will be required to file their annual accounts via commercial software^[1], removing the option to file abridged accounts. However, in a concession to privacy concerns, small companies and micro-entities will be able to opt out of publishing their profit and loss information on the public register^[1].

The implementation date has been pushed back from April 2027 to April 2028, giving companies "one full accounting year, plus 9 months (21 months) to get ready"^[1], according to Companies House.

Sectors Most Affected by New Requirements

Analysis of the CompanyPulse company register^[2] reveals which sectors will face the greatest compliance burden from these changes. The property sector dominates, with 443,384 companies operating in "other letting and operating of own or leased real estate" currently filing abbreviated accounts^[2].

The second most affected sector is "buying and selling of own real estate" with 273,737 companies^[2], followed by management consultancy activities (272,851 companies)^[2] and other business support services (224,286 companies)^[2].

Technology companies also feature prominently in the data. Information technology consultancy activities account for 166,487 companies^[2], while business and domestic software development represents 100,521 companies^[2]. Other significantly affected sectors include online retail (201,301 companies)^[2] and residents property management (137,334 companies)^[2].

Geographic Distribution of Impact

The geographic distribution of affected companies shows a heavy concentration in major urban centres. London leads with 1,055,679 companies currently filing abbreviated accounts^[2], representing approximately one-third of all affected businesses nationwide.

Manchester ranks second with 102,345 companies^[2], followed by Birmingham (92,550)^[2], Glasgow (70,845)^[2], and Edinburgh (57,405)^[2]. Other major centres include Bristol (56,131)^[2], Leeds (50,410)^[2], and Cardiff (47,421)^[2].

The data indicates that companies in London will bear a disproportionate share of the compliance burden, with the capital accounting for roughly ten times as many affected businesses as the second-largest centre.

Key Changes to Filing Requirements

The reforms introduce several significant changes beyond the profit and loss filing requirement. Companies House has confirmed that the option for companies to file abridged accounts will be removed entirely^[1]. Additionally, all companies claiming an audit exemption will need to provide a strengthened eligibility statement^[1].

The requirement for all companies to file accounts via commercial software represents a significant digitalisation push. This change affects not just small companies but all businesses filing with Companies House, potentially impacting the entire population of 6,087,391 companies on the UK company register^[3].

Other technical changes include requiring all component parts of filed accounts and reports to be submitted together^[1], and reducing the number of times a company can shorten its accounting reference period^[1].

Implementation Timeline and Business Preparation

The extended timeline to April 2028 reflects government engagement with stakeholders who raised concerns about the impact of the reforms. According to Companies House, the government conducted "extensive engagement with stakeholders to consider their views around the impact some of the reforms might have on companies"^[1].

Companies House has committed to contacting all companies via their registered email addresses to inform them about the changes and provide guidance^[1]. This direct communication approach will be critical given the scale of affected businesses.

The reforms aim to "improve the transparency, accuracy and reliability of data on the companies register" while also helping to "inform business decisions" and "tackle economic crime"^[1]. The balance between transparency and privacy concerns is addressed through the opt-out provision, which allows small companies and micro-entities to file profit and loss information without it appearing on the public register.

With approximately 3.2 million companies potentially affected based on typical small company proportions, the changes represent one of the most significant shifts in UK corporate filing requirements in recent years. The 21-month preparation period provides time for businesses to adapt their accounting processes and invest in the necessary commercial software to meet the new digital filing requirements.