If you're a UK business owner, director, or accountant, you've likely felt the ripples of transformation at Companies House over the past year. Driven by the Economic Crime and Corporate Transparency Act 2023 (ECCTA), these reforms aim to clamp down on economic crime, boost transparency, and modernize the filing process. As we hit mid-November 2025, many changes are now live, with more rolling out through 2026. From mandatory identity checks to a full pivot to digital-only submissions, staying compliant just got a lot more tech-savvy—and a bit stricter.
In this post, we'll break down the biggest shifts in how to file accounts and other key Companies House documents. Whether you're prepping your annual accounts or your next confirmation statement, here's what you need to know to avoid penalties, strikes-offs, or filing headaches. Let's dive in.
1. Identity Verification: No More Flying Under the Radar
One of the headline reforms? Mandatory identity checks for anyone setting up, running, or controlling a UK company. This phased rollout is designed to verify that real people (not shells or fraudsters) are behind the filings.
- Timeline:
- Phased start from spring 2025.
- From 18 November 2025, new directors and Persons with Significant Control (PSCs) must verify their ID before appointment.
- Existing directors and PSCs get a 12-month transition period, tied to your next confirmation statement.
- By spring 2026, all filers (including officers and third parties) need verification—or must use an Authorised Corporate Service Provider (ACSP).
- How to Do It: Use Companies House's free digital service or an ACSP (like your accountant). You'll need photo ID and proof of address. Once verified, you'll get a unique ID number.
- Impact on Filings: Unverified individuals can't file directly after spring 2026. Disqualified directors? They'll need ACSP approval in exceptional cases only. Non-compliance could block your ability to act as a director or even lead to company dissolution.
Pro Tip: Verify early via the GOV.UK portal to avoid last-minute scrambles. Companies House plans to email reminders, but don't count on it—get ahead now.
2. Digital-Only Era: Kiss Paper Goodbye
Remember filing by post? Those days are over. Companies House is going full digital to cut errors, speed up processing, and make data more accessible.
- Paper Ban: No more paper submissions for any key documents, including accounts. Everything must use approved digital formats.
- GOV.UK One Login: From 13 October 2025, WebFiling requires linking to your GOV.UK One Login account. Update your email to match, and create a login if you haven't. This adds two-factor authentication for extra security.
- Software-Only for Accounts: The big one hits on 1 April 2027—all accounts (even dormant ones) must be filed via commercial software using APIs. No more WebFiling or paper routes for accounts, though other filings (like confirmation statements) can still use web services. Companies House will notify filers by July 2025 to prep.
- Joint Filing Service Closure: The online tool for filing accounts and Company Tax Returns with HMRC shuts down on 31 March 2026. You'll need separate portals post-closure: Companies House for accounts, HMRC for tax.
These changes mean investing in compatible software (like Xero or QuickBooks) if you haven't already. Third-party agents? They'll need to adapt too.
3. Accounts Filing: Streamlined, But Less Flexible
Filing annual accounts just got more transparent—and less forgiving for small outfits. The goal? Ensure the public register shows a fuller picture without overwhelming micro-businesses.
- New Requirements for Small/Micro-Entities (effective for periods starting 6 April 2025):
- Micro-entities: File a balance sheet plus a profit and loss (P&L) account. No more "filleted" options—abridged accounts are off the table.
- Small companies: Balance sheet, directors’ report, (if applicable) auditor’s report, and P&L account.
- Audit Exemptions: Add an enhanced directors’ statement on the balance sheet, confirming eligibility and the specific exemption claimed.
- Shortening Accounting Periods: You can only shorten your reference period more than once in five years if you provide a solid business reason. No more gaming the system for deadline dodges.
- iXBRL Updates: You can now file certain iXBRL-tagged accounts packages directly with Companies House for periods starting 6 April 2025.
Delayed Good News: Plans to force all small/micro-entities to file full P&L accounts were paused in June 2025 for review—relief until at least April 2027.
Deadlines remain the same (9 months for private companies), but expect more scrutiny. Companies House can now query inconsistencies, reject dodgy docs, and impose steeper fines for late or false filings.
4. Confirmation Statements and Other Filings: Lawful Intent Required
Your annual confirmation statement isn't just a rubber stamp anymore—it's a compliance checkpoint.
- From 4 March 2024 (still key in 2025): Include a registered email address and a statement confirming your company's future activities are lawful. Companies House will actively enforce this.
- No More On-Site Registers: From 18 November 2025, ditch the requirement to hold certain registers (e.g., members, directors). Everything centralizes at Companies House—no more "electing" to keep officer info privately.
- Registered Office Rules: PO Boxes are banned. Your address must be "appropriate"—deliverable, acknowledgeable, and linked to your business (e.g., a trading address). Invalid ones risk strike-off.
Other filings like incorporation now cost more from 1 February 2026 (£100 digital fee, up from £12), so budget accordingly.
Why These Changes Matter—and How to Prepare
These reforms aren't just bureaucratic tweaks; they're a seismic shift toward a "smarter, active" Companies House that's tougher on fraud but friendlier to legit businesses. By 2030, the strategy promises even more automation and data-sharing with HMRC.
Action Steps:
- Verify IDs Now: Directors/PSCs, hit the portal today.
- Upgrade Tech: Ensure your software supports API filings and iXBRL.
- Review Addresses: Audit your registered office for compliance.
- Consult Pros: Work with an ACSP or accountant for seamless transitions—especially if you're a small entity eyeing those delayed rules.
- Stay Updated: Bookmark the Changes to UK Company Law site and sign up for Companies House alerts.
Missed deadlines could mean fines up to £1,500 (or more for persistent issues), so treat this as your wake-up call. Got questions? Drop a comment below—we're here to help demystify the maze.
Sources: Official GOV.UK guidance, Companies House strategy updates, and ECCTA transition plans. Always check gov.uk for the latest.
What changes are you most worried about? Share in the comments!