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Extremely welcome Companies House reforms announced

Posted on June 12, 2026 by Editor

The UK Department of Business and Trade and the business registrar, Companies House, announced on Tuesday that mandatory Inline XBRL filings for all UK companies will commence on 1 April 2028.

Under the reforms, every UK company will be required to file accounts in iXBRL format using commercial software, with the existing web and paper filing routes closing down. The UK is closing off an anomaly that has existed for more than a decade: while every company already has to file their accounts in Inline XBRL to HMRC (His Majesty’s Revenue & Customs — the tax authority in the UK), the provision to file their financial statements to Companies House in digital form was optional. In practice this means that more than 2.5 million mostly small companies provide their accounts in Inline XBRL every year. On the other hand almost every large private company opt to provide an opaque PDF version of their financials instead. With this change all of those entities will become vastly easier to analyse, opening up opportunities for lenders, capital providers, suppliers and customers to serve UK companies of all sizes in new ways.

Until now small companies and micro-entities were not obliged to file a profit and loss with Companies House. From 1 April 2028 they will be obliged to file them, although they can opt out of having them published on the public register. The reform removes the option to file abridged accounts and strengthens requirements for audit exemption. This means that public authorities beyond HMRC, the tax authority (bound by strict confidentiality requirements) will have access to small company profits data, while small and micro company owners will be able to elect to keep the profitability of their operations hidden from the general public (and their neighbours).

The changes stem from the Economic Crime and Corporate Transparency Act 2023, designed to improve the quality and reliability of a register that has been criticised as vulnerable to misuse. Companies House itself puts the case in terms we’d happily borrow: “the move will improve the quality of financial data for register users, opening up new opportunities for company accounts data to be aggregated, compared and analysed”. What they don’t say, but we will, is that these reforms fundamentally expands the power of financial statements to support economic growth. Transparency of this kind opens up an entire economy in a way that can expand trust, expand investment, lending and connectivity both within a country’s borders and across those borders. Bravo!

Read more here.

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