Companies House IDV & ACSP: New 2027 Timeline & Your Firm's Strategy

Companies House IDV & ACSP: A New Timeline for UK Accounting Firms

The landscape of UK corporate compliance is continually evolving, driven by the ambitious reforms of the Economic Crime and Corporate Transparency Act 2023 (ECCTA). A key aspect of these reforms involves mandatory identity verification (IDV) for individuals interacting with Companies House, alongside the introduction of Authorised Corporate Service Provider (ACSP) registration. While previous announcements hinted at earlier deadlines, Companies House has now confirmed a significant delay for the mandatory implementation of IDV for 'presenters' and ACSP registration.

This critical update pushes the mandatory requirements to 'no earlier than November 2027', accompanied by a commitment to provide at least six months' notice before these provisions come into force. For UK accounting and bookkeeping practices, this extended Companies House IDV & ACSP timeline is not a reason to relax, but rather a valuable window to strategically plan and embed robust compliance processes. This post will delve into what this revised schedule means for your firm and how to leverage this additional time effectively.

Understanding the ECCTA and the Latest IDV & ACSP Delay

The Economic Crime and Corporate Transparency Act 2023 (ECCTA) received Royal Assent on 26 October 2023, marking the most significant overhaul of UK company law in a generation. Its core objective is to combat economic crime by enhancing transparency and improving the accuracy of the Companies House register. This includes new powers for Companies House to query, reject, and remove suspicious information, moving it from a passive register to an active gatekeeper.

Initially, many of the ECCTA's provisions, including mandatory IDV for those filing documents (presenters) and ACSP registration, were anticipated to come into force sooner. There was an earlier delay from Spring 2026 to November 2026. However, Companies House has now announced a further postponement, stating that these specific measures will not take effect before November 2027.

Key Takeaway: The mandatory IDV for 'presenters' and ACSP registration has been delayed to 'no earlier than November 2027'. Companies House will provide at least six months' notice before implementation.

It is crucial to differentiate this from the IDV requirements for directors and Persons with Significant Control (PSCs). Mandatory identity verification for new directors and PSCs has been in force since 18 November 2025. Existing directors and PSCs have a 12-month transition period, with a hard deadline of 18 November 2026, linked to their company's confirmation statement filing. This means many of your clients and their officers should already be verifying their identities.

Mandatory Identity Verification (IDV) for Presenters: What to Expect

Under the ECCTA, anyone who files information at Companies House on behalf of a company – referred to as a 'presenter' – will be required to verify their identity. This includes accountants, bookkeepers, company secretaries, and other professionals who routinely submit filings for clients.

The purpose of this measure is to enhance the integrity of the register by ensuring that those submitting information are who they claim to be, thereby minimising fraudulent filings and improving data accuracy. Once implemented, filings made by unverified individuals will likely be rejected.

Methods of Identity Verification

Companies House will offer methods for IDV, which are expected to include digital verification via the GOV.UK One Login system. This process typically involves providing identification documents and potentially using facial recognition technology. Alternatively, individuals may be able to verify their identity through an Authorised Corporate Service Provider (ACSP).

The Role of Authorised Corporate Service Providers (ACSPs)

The concept of an Authorised Corporate Service Provider (ACSP) is central to the ECCTA reforms. An ACSP is a business (or sole trader) registered with Companies House that is authorised to perform identity verification checks for clients and file documents on their behalf.

While mandatory ACSP registration for all filing agents is delayed, registration for firms wishing to verify client identities opened on 18 March 2025. If your firm intends to offer ID verification services to clients, or if you simply file documents for them, registering as an ACSP will become a necessity.

ACSP Registration Requirements

AML Supervision: To register as an ACSP, your firm must be supervised by a recognised UK Anti-Money Laundering (AML) supervisory body (e.g., ICAEW, ACCA, ICAS, HMRC). This is a fundamental prerequisite.
Senior Role: The application must be submitted by an individual in a senior role within the business (e.g., a director for a limited company, or the sole trader themselves).
Ongoing Compliance: ACSPs must comply with legal requirements, including notifying Companies House of any changes to their information within 14 days and retaining records of identity checks for seven years.

Becoming an ACSP can streamline your client onboarding and compliance processes, allowing you to handle identity verification as part of your existing workflow, rather than directing clients to a separate GOV.UK portal. This can be a significant competitive advantage and improve client experience.

Strategic Planning for Accounting Practices: Leveraging the Extended Timeline

The delay to the Companies House IDV & ACSP mandatory requirements until at least November 2027 provides a valuable opportunity for accounting practices to refine their compliance strategy. Instead of a rushed implementation, firms can now adopt a more measured and robust approach.

1. Re-evaluate Resource Allocation and Training

Internal Review: Assess your current team's capacity and expertise in new compliance areas. Do you have dedicated compliance officers?
Training Programmes: Develop and roll out comprehensive training programmes for all staff involved in client onboarding and Companies House filings. This should cover the specifics of ECCTA, IDV requirements, and ACSP obligations.
Budgeting: Allocate appropriate budget for technology, training, and potential external consultancy to ensure smooth transition.

2. Review and Update Client Onboarding Processes

The delay for presenters doesn't negate the immediate need for director/PSC IDV. Ensure your client onboarding processes are already compliant with the existing IDV requirements for new and existing directors and PSCs.

Digital-First Approach: Consider integrating digital identity verification tools into your onboarding workflow. This can make the process more efficient and secure for both your firm and your clients.
Client Communication: Proactively communicate the existing and upcoming IDV requirements to your clients. Explain the importance of verification and how your firm can assist.

3. Engage with Digital Tools and Software Providers

Digital solutions are becoming indispensable for modern compliance. Many SaaS platforms for accountants and bookkeepers offer integrated tools for AML compliance, client onboarding, and Companies House filings.

Integrated Solutions: Look for platforms that can facilitate ACSP registration, manage IDV processes, and streamline Companies House submissions. This integration can reduce manual effort and minimise errors.
Future-Proofing: Investing in robust digital infrastructure now will prepare your firm not only for the Companies House IDV & ACSP requirements but also for other upcoming changes, such as mandatory software filing of accounts (expected from April 2028).

Practical Steps Your Firm Can Take Now

Despite the extended timeline for presenter IDV and ACSP registration, proactive measures are essential to avoid last-minute panic and ensure a seamless transition.

Confirm AML Supervision Status: Verify that your firm is fully registered and compliant with a recognised UK AML supervisory body. This is a non-negotiable prerequisite for ACSP registration.
Review Client Data & Registers: Ensure all client company registers are accurate and up-to-date. This includes details of directors, PSCs, and registered office obligations. Companies House now has enhanced powers to query and reject filings with inaccurate information.
Educate Your Clients: Remind clients about the current mandatory IDV for directors and PSCs. Explain the importance of providing their personal codes to Companies House to avoid filing delays and potential penalties.
Draft Internal Policies: Develop clear internal policies and procedures for handling IDV, ACSP responsibilities, and the new Companies House filing requirements.
Consider Voluntary ACSP Registration: If your firm wishes to offer client ID verification services now, you can register as an ACSP voluntarily. This allows you to familiarise yourself with the process and gain experience before it becomes mandatory for all filing agents.
Stay Informed: Regularly monitor official Companies House announcements and government guidance regarding ECCTA implementation. The landscape is dynamic, and staying updated is crucial.

Looking Ahead: Preparing for Future Compliance Landscape Changes

The ECCTA brings a broad spectrum of changes beyond IDV and ACSP, all aimed at improving corporate transparency and combating economic crime. While the Companies House IDV & ACSP timeline has shifted, other reforms are already in motion or have different implementation dates.

Registered Office and Email Address: Since March 2024, all companies must have an 'appropriate' registered office address (PO Boxes are no longer permitted) and provide a registered email address to Companies House.
Accounts Filing Reforms: Changes affecting accounts prepared and filed by small companies and micro-entities, including the removal of abridged accounts and mandatory software filing, are now expected from April 2028. Companies will receive at least 21 months' notice for these changes.
Limited Partnership Reforms: Increased transparency requirements for Limited Partnerships are expected no earlier than the end of 2026.

These ongoing reforms underscore the importance of a proactive and adaptable compliance strategy. Digital tools play a vital role in navigating this complexity, offering automated checks, secure data storage, and streamlined submission processes to Companies House and HMRC.

Conclusion: Proactive Compliance is Key

The announcement of the 'no earlier than November 2027' timeline for mandatory presenter IDV and ACSP registration for all filing agents provides a welcome extension. However, it is not an invitation to defer action. The underlying purpose of the ECCTA – to foster greater corporate transparency and combat economic crime – remains paramount.

For UK accounting practices, this extended period is a strategic gift. Use it to thoroughly review your internal processes, invest in appropriate technology, train your team, and proactively engage with your clients. By adopting a forward-thinking compliance strategy now, your firm can ensure it is fully prepared to meet the evolving demands of Companies House and continue to provide exceptional, compliant services.