If you are a director of a UK limited company, the filing rules you relied on last year may no longer work this year. Companies House is in the middle of its biggest overhaul in decades, and by late 2026 you will not be able to file a paper account, sign off an abridged set of micro-entity accounts, or send your accountant to submit documents on your behalf unless identities have been verified. The changes are not cosmetic — they reshape who can file, how accounts must be prepared, and what happens if a director's identity is not confirmed.
The reforms come from the Economic Crime and Corporate Transparency Act 2023 (ECCTA). The stated aim is to make the UK company register more reliable and to close the loopholes that made it easy to set up companies with opaque ownership. For legitimate small-company owners, that translates into more upfront compliance but also, in theory, greater trust in the register and less scope for fraudsters to misuse company identities. Understanding the timeline now prevents a scramble when a filing is rejected or a directorship is flagged as non-compliant.
Why Companies House Is Changing
For years Companies House has been a largely passive registrar. It accepted filings at face value and had limited powers to query them. ECCTA flips that model. Companies House is becoming an active gatekeeper with powers to verify identities, query filings, and demand more information.
The transition plan has been rolling out in phases since 2024. The most visible changes for small companies land between November 2025 and late 2027, with identity verification already live for directors and Persons with Significant Control (PSCs), and filing reforms still in a notice period.
Think of the reform in four buckets: who must verify identity, who can file, how accounts are filed, and how corporate structures are constrained. Each bucket has its own deadline and practical consequences for bookkeeping.
Mandatory Identity Verification: Who Needs It and When
Identity verification is the centrepiece. If your name is on the public register as a decision-maker or owner, Companies House will want to confirm you are who you say you are, and link that verified identity to your company appointments.
Directors and PSCs — Already Live Since November 2025
Every individual director and every individual PSC has been required to verify their identity since November 2025. You can verify:
- directly with Companies House via GOV.UK One Login (using a biometric passport, driving licence, or the Companies House app), or
- through an Authorised Corporate Service Provider (ACSP) — typically an accountant, solicitor, or formation agent that is registered and supervised for anti-money-laundering purposes.
If you became a director after that date, you must verify before your appointment is fully effective. Existing directors are given a transition period tied to their next confirmation statement. Fail to verify, and you risk civil penalties, being flagged as unverified on the public register, and eventually being prohibited from acting as a director.
For PSCs — generally anyone holding more than 25% of shares or voting rights, or with significant influence — the same duty applies. Companies must ensure their PSCs verify promptly and should keep a record of verification status alongside the statutory register.
Relevant Legal Entities and Corporate PSCs
The next extension covers Relevant Legal Entities (RLEs) that qualify as PSCs. An RLE is typically another company sitting in the chain above your company. Under the reform, an RLE that is a PSC must nominate a “relevant officer” — a natural person whose identity is verified — and confirm that linkage to Companies House.
The same logic extends to nominated directors of corporate general partners in limited partnerships. If a limited partnership uses a corporate general partner and nominates a natural person to act, that individual will need to verify.
Corporate directors themselves are expected to be brought into a similar regime in due course. Companies House has signalled the direction but has not yet published a confirmed timeline. The policy intent is clear: every layer of corporate control must ultimately trace back to a verified natural person.
Anyone Delivering Documents
The broadest verification rule applies to anyone delivering documents to Companies House, whether they are filing for themselves or on behalf of a client or employer. Unless you are acting as an employee of an ACSP, you will need a verified identity to file anything — confirmation statements, director appointments, registered-office changes, and accounts.
This matters if you handle your own filings in-house. You personally will need to be verified. If your accountant or company secretary files for you, they must either verify you or be an ACSP that can verify on your behalf.
The ACSP Regime: Why Your Accountant May Need to Re-Register
Under ECCTA, third-party agents will only be able to file documents if they are registered as an ACSP. Registration is not automatic for existing accountants or formation agents; the firm must apply to Companies House, demonstrate it is supervised for anti-money laundering, and then maintain that status.
For small-company owners, the practical check is simple: ask your agent whether they are — or will be — an ACSP. If they are not, they will not be able to file on your behalf once the rule takes effect.
The ACSP filing requirement was originally expected in Spring 2026 but has been pushed back to no earlier than November 2026. That delay gives firms more time to register, but you should not assume it will slip indefinitely. The verification obligation for directors and PSCs is already live, so the filing gateway is the remaining piece.
If you use a boutique bookkeeper who is not AML-supervised, start the conversation early. You have three options: the bookkeeper becomes supervised and registers, you switch filing to an ACSP, or you file directly after verifying your own identity.
New Restrictions on Corporate Directors
A second structural change targets corporate directors themselves. Historically, a UK company could appoint another company as a director, which created long opacity chains. ECCTA will restrict that practice sharply.
Under the new rules:
- Any corporate director must have an all-natural-person board. In other words, the company acting as director cannot itself have corporate directors.
- Those natural persons behind the corporate director will be required to verify their identities.
- Overseas companies will no longer be permitted to act as a corporate director of a UK company.
For groups that use a holding company or corporate services company as a director across multiple subsidiaries, this will require restructuring. Companies House has not confirmed an implementation date for the corporate-director ban, but the transition plan signals it is coming and that early advice is advisable. If you currently have a corporate director, map the chain now: who are the ultimate natural persons, have they verified, and does an overseas entity need to be replaced?
Software-Only Filing and the End of Abridged Accounts
Accounts filing is where bookkeeping workflows change most visibly. ECCTA will mandate software-only filing of accounts using iXBRL, and it will remove filing options that many small companies have relied on to minimise disclosure.
Software-Only iXBRL Accounts
Today, small companies can still file accounts using Companies House WebFiling or even on paper for some submission types. Under the reform, all accounts must be delivered through software that produces fully tagged iXBRL (Inline eXtensible Business Reporting Language) accounts. WebFiling for accounts will close, and paper filing will no longer be accepted.
iXBRL is not a new format — companies filing to both Companies House and HMRC via Corporation Tax already encounter it — but the mandate widens it to every company. Practically, you will need:
- accounting software that can generate iXBRL-tagged statutory accounts, or
- an accountant or ACSP whose software does.
If you keep your books in a spreadsheet and convert to a PDF for filing, that workflow will break. The tags matter because Companies House wants machine-readable data to run automated checks and cross-reference filings. Errors in tagging (for example, mis-tagging revenue or misclassifying loans to directors) can trigger queries or rejection.
Bookkeeping tip: reconcile your Companies House accounts to your management accounts before tagging. The most common small-company filing errors are not fraud but inconsistency — a director's loan balance in the balance sheet that does not match the directors' loan account in the bookkeeping, or a profit figure that differs from the Corporation Tax computation because year-end adjustments were posted in one place but not the other. With structured iXBRL data, those mismatches become easier for Companies House to spot.
No More Abridged or Filleted Accounts
Small companies and micro-entities can currently choose to file abridged accounts or to fillet (omit) the profit and loss account and directors' report from the public filing. ECCTA will remove that option. Small and micro companies will file a more complete set of accounts on the public record.
That raises the stakes on disclosure accuracy. If you previously filleted to keep profit margins or director remuneration out of public view, the new requirement means that information — within the statutory format — will be visible. It does not change what must be prepared under accounting standards, but it changes what must be delivered to Companies House.
Plan for earlier year-end close discipline. With a full filing, last-minute adjustments are more visible and harder to unwind after submission. Build a month-end routine that keeps the balance sheet clean so the statutory accounts are a presentation exercise, not a reconstruction.
Limits on Shortening Accounting Reference Periods
Companies House also plans to limit how often you can shorten an accounting reference period. Frequent shortening has been used to manipulate filing deadlines or to create short periods that obscure trends. The new limit will prevent repeated shortening without a legitimate business reason. If you regularly move your year-end, document the commercial rationale and check the new frequency cap before filing the change.
Timeline for Accounts Reforms
The accounts reforms were initially slated for April 2027. Companies House has confirmed they remain under review and will be delayed, and that companies will receive at least 21 months' notice before implementation. Treat 2027 as indicative, not fixed, but use the delay to upgrade your software and close process rather than deferring preparation. When the 21-month notice lands, the window will look longer than it is if you need to migrate accounting systems.
Limited Partnership Reform: More Transparency by End of 2026
If your business uses a limited partnership — common for investment vehicles, property syndicates, and some asset-holding structures — ECCTA brings partnership-specific reforms expected by the end of 2026.
Anticipated requirements include:
- Maintaining an appropriate address in the UK jurisdiction where the partnership is registered
- Notifying Companies House of changes to partner details within 14 days
- Filing an annual confirmation statement for the partnership
Companies House will gain enhanced powers to require more detailed information from limited partnerships, including the ability to query filings and demand supporting evidence. For general partners and fund administrators, this means tighter data collection and a shorter window to report changes. If you administer a partnership via a corporate general partner, the identity-verification rules for nominated directors and relevant officers apply here too.
What Small Company Owners Should Do Now
The reforms span multiple deadlines, which makes a single checklist more useful than tracking each announcement separately.
1. Verify Every Director and PSC Immediately
Do not wait for your confirmation statement due date. Use the GOV.UK One Login route or your ACSP. Check that the verified name matches the register exactly — a mismatch between a middle name, a former name, or a transliteration can create an unverified flag. Keep a screenshot or confirmation of verification and file it with your statutory records.
If you have PSCs who are individuals based overseas, verify early. Document checks for non-UK passports can take longer, and those individuals will still need to file before they can act.
2. Confirm Your Filing Route
Decide who will file after November 2026. If you file in-house, ensure each filer is verified. If you rely on an agent, confirm in writing that they will be an ACSP or that they have a partnership with one. Ask about their iXBRL capability for statutory accounts — not all cloud bookkeeping subscriptions include statutory accounts tagging.
3. Audit Your Accounting Software
Can your current software produce fully tagged iXBRL statutory accounts that include the notes and disclosures required for your company size? If not, budget for an upgrade or for outsourcing the statutory layer to your accountant. Test the workflow on your last filed set before it becomes mandatory: generate the iXBRL file, validate it, and compare it to the previously filed PDF to spot tagging or disclosure gaps.
Keep your chart of accounts aligned to the statutory presentation. For example, separate director loan accounts, intercompany balances, and hire-purchase obligations cleanly rather than netting them in a generic “other creditors” code. Clean nominal coding makes tagging accurate and reduces post-filing queries.
4. Review Corporate Director and PSC Structures
List all corporate directors and corporate PSCs above your company, including overseas entities. For each, identify the ultimate natural persons and whether they have verified identities. Where a corporate director is an overseas company, plan for its removal. Where a corporate director is a UK company with its own corporate directors, unwind the chain so the acting director has an all-natural-person board.
If restructuring is needed, it is more than a Companies House form. It may trigger share transfers, board resolutions, or changes to articles. Start early enough to avoid a filing deadline coinciding with an unprepared restructuring.
5. Prepare for Fuller Public Disclosure
Assume your next statutory filing after the reform will be more visible. Review what will become public: profit and loss detail, related-party transactions, and the level of note disclosure. Discuss with your accountant whether any presentational choices — for example, how you disclose director remuneration or average employee numbers — need revisiting. Good bookkeeping throughout the year makes full disclosure unremarkable because the numbers already reconcile.
6. Tighten Year-End and Confirmation Statement Disciplines
With identity requirements tied to confirmation statements and accounts requiring validated iXBRL, last-minute filings become riskier. Build a calendar that includes:
- Verification status check 30 days before confirmation statement due date
- Year-end close checklist that reconciles directors' loans, intercompany, VAT, and payroll before drafting statutory accounts
- iXBRL validation run two weeks before filing deadline, not the night before
Version-controlled, plain-text records of year-end journals — who posted them, why, and with what source document — make it straightforward to answer a Companies House query if one arrives. A stored PDF cannot.
How the Bookkeeping Connects
The reforms are framed as anti-fraud measures, but their operational impact is on bookkeeping quality. Verified identities, ACSP-gated filing, and machine-readable accounts all assume that the underlying financial records are accurate, consistent, and traceable. Companies that already keep clean, reconciled books will experience the overhaul as a procedural update: verify identities, switch to software filing, publish a fuller set of accounts. Companies that treat year-end as a scramble — reconstructing records from bank statements and patching gaps with journals — will feel it as a much larger disruption.
That is also where better tooling pays back. Maintaining a single ledger that reconciles to both HMRC filings and Companies House accounts — with tagged statutory output and a complete audit trail of adjustments — turns a regulatory burden into a routine export. The companies that adapt early will spend less time re-explaining their own numbers to the registrar.
Simplify Your Financial Management
As Companies House moves to verified identities and software-only iXBRL filing, keeping a clean, consistent ledger that reconciles across HMRC and Companies House becomes non-negotiable. Beancount.io gives you plain-text accounting that is fully transparent, version-controlled, and AI-ready — so your year-end journals, director loan movements, and intercompany balances are traceable and your statutory accounts are a presentation of records you already trust. Get started for free and bring the same rigour to your books that Companies House now expects from your filings.