HMRC & Companies House Are Ending Free Filing — What It Means for Your Business

The landscape of corporate reporting in the UK is undergoing a profound transformation. For years, micro-entities and small businesses have relied on the free online filing portals provided by HM Revenue & Customs (HMRC) and Companies House to submit their annual accounts and tax returns. However, both government bodies are now actively transitioning away from these legacy systems, requiring businesses to adopt commercial third-party software to meet their statutory obligations. This shift is not a sudden whim, but a calculated move towards a fully digitised, heavily regulated, and interconnected financial ecosystem. Whether you run a bustling e-commerce store, a consulting firm, or hold a dormant company, these changes affect every single limited company registered in the UK. Understanding the implications now is crucial to avoiding severe penalties and ensuring a seamless transition.

HMRC has been steadily pushing towards its "Making Tax Digital" (MTD) vision for years. As part of this, the free HMRC Company Accounts and Tax Online (CATO) service—often referred to as the Basic CT600 tool—is being systematically restricted and phased out. Since April 2024, an increasing number of companies have found themselves ineligible to use the free HMRC filing tool due to complex tax situations or simply because of the government's mandate to migrate users to commercial solutions. By the end of 2026, the expectation is that all CT600 (Corporation Tax) returns, along with the accompanying computations and statutory accounts, must be submitted through recognised, MTD-compatible commercial software. While you will still use your HMRC Government Gateway credentials to authenticate your identity, the actual preparation of the forms, the calculation of tax liabilities across various CT600 boxes, and the mandatory iXBRL (Inline eXtensible Business Reporting Language) tagging must be handled entirely by approved third-party software.

Companies House is simultaneously undergoing its most significant modernisation in decades, largely driven by the Economic Crime and Corporate Transparency Act 2023. The legacy WebFiling service, which has allowed directors to manually key in abbreviated or micro-entity accounts via a simple web form, is being retired. The Companies House transformation programme dictates a move to a "software-only" filing model for annual accounts. This means that paper filings and direct web-form submissions are being completely phased out. Moving forward, companies will be required to file their accounts in a fully tagged iXBRL format via approved commercial software providers. For micro-entities (those applying the FRS 105 reporting standard), this removes the familiar, albeit clunky, free safety net. You can no longer just log into Companies House and type your balance sheet figures into a web page; the data must be mathematically validated and digitally tagged before it ever reaches their servers.

At first glance, forcing businesses to use commercial software might seem like an unnecessary burden, but the government's rationale is rooted in data integrity, economic security, and administrative efficiency. Firstly, data quality is paramount. Manual entry into web portals is highly prone to human error—typos in balance sheets, mismatched accounting periods, and mathematical inconsistencies. Commercial software automatically validates this data before submission, drastically reducing the administrative burden on government agencies to query incorrect filings. Secondly, the push is heavily tied to combating fraud. By mandating structured digital data (iXBRL), HMRC and Companies House can easily cross-reference filings in real-time. If a company reports a £100,000 profit to Companies House but declares a loss to HMRC, automated systems will instantly flag the discrepancy. Finally, it paves the way for the full rollout of Making Tax Digital for Corporation Tax, ensuring all UK businesses are operating on modern digital infrastructure.

The short answer is: every UK limited company. If you have a Company Registration Number (CRN), these changes apply to you. Specifically, this impacts Micro-entity companies (typically defined as having a turnover under £632,000, a balance sheet total under £316,000, and 10 or fewer employees). These businesses previously benefited the most from the free government portals and are now the primary demographic needing to transition to commercial software. It also impacts Small companies applying FRS 102 Section 1A, as well as Dormant companies that have not traded during the financial year. While sole traders and traditional partnerships fall under different rules (like MTD for Income Tax), limited liability partnerships (LLPs) and standard limited companies must prepare for software-mandated filing.

The transition is already underway, with a hard push expected between 2025 and 2026. For Companies House, the software-only mandate for annual accounts is being rolled out progressively, and paper filings are already being aggressively rejected. To understand your personal deadlines, look at your accounting period. For example, if your company's accounting period ended on 31 March 2025: - Your Companies House annual accounts deadline is 9 months after your period end: 31 December 2025. - Your HMRC Corporation Tax payment is due 9 months and 1 day after the period end: 1 January 2026. - Your actual HMRC CT600 filing deadline is 12 months after the period end: 31 March 2026. Missing these dates because you were unaware the free portal was closed is not a valid excuse in the eyes of the law, and late filing penalties are automatically triggered the day after the deadline.

Commercial software acts as the secure bridge between your company's financial data and the government's databases. It handles the preparation, calculation, digital tagging, and electronic submission of your statutory documents. When evaluating a software provider, you shouldn't have to become an expert in coding or tax law. Look for platforms that offer: 1. Automatic Corporation Tax calculations based on the latest HMRC tax rates (including the marginal relief calculations introduced in 2023). 2. Invisible iXBRL document generation—the software should apply the complex digital tags in the background. 3. Dual submission capabilities, allowing you to file to both HMRC and Companies House from a single interface. 4. Strict adherence to FRS 102 (the small company accounting standard), which also covers micro-entities. 5. Clear, transparent pricing without locking you into expensive monthly accounting subscriptions if you only need to file once a year.

WeFile was engineered specifically to bridge the gap left by the closure of the government's free portals. We are a modern, cloud-based platform meticulously tailored for UK small companies (including micro-entities), stripping away the complexity of traditional accounting software. Instead of confronting you with confusing spreadsheets or jargon-heavy tax boxes, WeFile uses a simple, wizard-driven interface. You are guided step-by-step through entering your Profit & Loss and Balance Sheet figures. Our engine then automatically performs your tax computation, generates a compliant CT600 form, and creates the required iXBRL files instantly. With WeFile, you benefit from dual submission—meaning you click a button, and your accounts are securely transmitted to both HMRC and Companies House simultaneously. Furthermore, We operate on a transparent per-filing pricing model. There are no expensive monthly retainers; you simply pay a flat fee when you are ready to submit your annual accounts.

A common misconception is that if a company is dormant (not actively trading), it doesn't need to file anything. This is entirely false. Even dormant companies must file annual accounts with Companies House and inform HMRC of their dormant status. Previously, filing for a dormant company was a trivial process using the free Companies House web portal (often via form AA02). With the software-only mandate, dormant companies also require commercial software to submit their status electronically. WeFile offers a dedicated, streamlined dormant company flow. If your company hasn't traded, you simply select the dormant option, confirm your accounting period and director details, and WeFile automatically generates and submits the appropriate dormant iXBRL accounts to Companies House and updates HMRC, keeping you compliant in just a few clicks.

The UK government enforces strict, automatic financial penalties for late or non-compliant filings, and these fines scale rapidly. For Companies House, penalties start at £150 if you are up to 1 month late. This rises to £375 for 1 to 3 months, £750 for 3 to 6 months, and £,1500 if you are over 6 months late. Crucially, if you file late two years in a row, these penalties are doubled. For HMRC, you face an immediate £100 penalty if you are a day late. Another £100 is added after 3 months. If your return is 6 months late, HMRC will estimate your tax bill and add a 10% penalty on top of the unpaid tax. Beyond financial fines, persistent non-compliance will lead to compulsory strike-off proceedings, where Companies House forcibly dissolves your company, freezing its bank accounts and transferring its assets to the Crown.

Don't wait until the week of your deadline to figure out your software strategy. Follow this checklist to ensure a smooth transition: (a) Create your WeFile account today to familiarize yourself with the platform. (b) Add your company profile using your Company Registration Number (CRN) so we can pull your official deadlines directly from the public register. (c) Verify your active HMRC Government Gateway credentials. Ensure you have the user ID, password, and access to the 2-factor authentication device tied to your corporate tax account. (d) Locate your Companies House Authentication Code. This is a 6-character alphanumeric code required to authorize filings. If you've lost it, you must request a new one by post to your registered office, which can take up to a week. (e) Gather and finalize your financial records (bank statements, invoices, receipts) well before your accounting period end. (f) Start the filing process at least a month before your earliest deadline to allow time for any unforeseen issues.

The mandate to use commercial software for annual accounts is just one piece of a much larger digital puzzle. The government's roadmap points firmly towards a highly regulated, technology-first approach to corporate compliance. Making Tax Digital (MTD) for Corporation Tax is currently in the consultation phase and, while not expected to be fully mandated before 2026 or 2027, it will eventually require companies to keep digital records and submit quarterly summary updates to HMRC, much like the current MTD for VAT rules. Additionally, the Economic Crime and Corporate Transparency Act is introducing mandatory digital identity verification for all company directors and Persons with Significant Control (PSCs). By adopting compliant, robust software like WeFile now, your business will be perfectly positioned to adapt to these upcoming regulatory waves without missing a beat.