Changes to online filing of accounts at Companies House

The Online Accounts and Company Tax Return (CATO) service is scheduled to close on 31 March 2026. ?

This service has enabled businesses to file their company accounts and tax returns simultaneously with both Companies House and HMRC. However, due to its outdated nature and misalignment with modern digital standards and recent changes in UK company law under the Economic Crime and Corporate Transparency Act (ECCT Act), the decision has been made to discontinue it.?

Key Actions for Businesses:

  • Download Past Filings: It's advisable to download and save at least three years of your company's account filings before 31 March 2026, as access to previous submissions will not be available after this date.?
  • Explore Software Options: Begin researching and selecting suitable commercial accounting software that meets the filing requirements for both Companies House and HMRC. Transitioning to software-based filing can offer enhanced features, improved accuracy, and better integration with your financial records.?

This shift aligns with the broader Making Tax Digital (MTD) initiative, aiming to streamline tax compliance through digital tools. While adapting to new software may present challenges, the benefits include increased efficiency and reduced errors in tax filings.?

For detailed guidance and updates, visit the official GOV.UK website.?

By proactively preparing for this transition, businesses can ensure continued compliance and take advantage of the efficiencies offered by modern digital filing systems.

Source:Other | 09-03-2025
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CIGMA Accounting
CIGMA Accounting Ltd is a forward-thinking accounting and tax firm based in London, dedicated to delivering high-quality compliance, tax planning, and business advisory services to entrepreneurs, landlords, and growing SMEs. With offices in Wimbledon and Farringdon, we combine local expertise with a tech-driven approach to simplify accounting. Our services include corporation tax filing, VAT compliance, HMRC investigation support, R&D tax credit claims, capital allowances optimisation, and bookkeeping automation. What sets CIGMA apart is our ability to blend traditional accounting rigour with AI-powered systems that reduce errors, save time, and provide real-time financial insights. Our team ensures that every client - from startups to high-net-worth individuals - receives a bespoke solution aligned with their growth goals. Whether you need strategic tax planning, help with HMRC disclosures, or a full outsourced finance function, CIGMA Accounting delivers clarity, compliance, and confidence.