If you run a UK limited company, there is a set of annual filings you are legally required to make with Companies House — and the question of what documents must every UK company file with Companies House annually is one that catches out more directors than you might expect. Not because the requirements are complicated, but because it is easy to assume your accountant has it covered, or to lose track of the dates after a busy quarter.

The two headline obligations are your statutory annual accounts and your confirmation statement. Beyond that, depending on your company's structure and activity, there may be additional filings triggered during the year. Each comes with its own deadline, its own consequences for lateness, and its own set of rules around what the document must contain.

In our experience, the directors who run into problems are usually not the ones who ignore these filings entirely — they are the ones who leave them until the last minute, misjudge the deadline, or assume that a small company exemption means fewer rules apply. Here is how we think about it.

Every UK registered limited company — whether trading, dormant, or a flat management company — has two non-negotiable annual filings with Companies House.

1. Annual statutory accounts

Your annual accounts are a set of financial statements that summarise the company's financial position and performance for the year. For a small private company, this typically means a balance sheet, a profit and loss account (depending on the exemptions you qualify for), and accompanying notes. The accounts must be prepared in accordance with either UK Generally Accepted Accounting Practice (UK GAAP) or International Financial Reporting Standards (IFRS), depending on your circumstances.

2. Confirmation statement

The confirmation statement — formerly known as the annual return — is a snapshot of your company's registered details at a given point in time. It confirms information such as your registered office address, directors, shareholders, share capital, and the nature of your business (SIC codes). It does not replace your accounts; it sits alongside them as a separate obligation.

Both filings go to Companies House. Neither goes to HMRC, though your Corporation Tax return — a separate obligation entirely — does. Directors who conflate these three obligations tend to be the ones who end up with gaps in their compliance history.

The deadline for your annual accounts depends on your company type. Private limited companies have nine months from the end of their accounting reference period to file their accounts at Companies House. Public limited companies have six months. These are statutory deadlines — they apply regardless of whether your accounts are with your accountant, whether your director has been unwell, or whether your bookkeeping was behind.

Your accounting reference period is essentially your financial year end. For most newly incorporated companies, the first accounting reference date is set 12 months after the end of the month in which the company was incorporated. After that, it usually falls on the same date each year. If your year end does not suit you — perhaps it falls during a busy trading period — you can apply to change it by filing form AA01 before the existing deadline. This is worth considering early, not as a last-minute manoeuvre.

For a company's first accounts, the filing window is slightly different: you have 21 months from the date of incorporation, or three months from the accounting reference date, whichever is longer. First-year accounts also tend to cover an unusual period if the incorporation date does not align neatly with a calendar month-end, which is another source of confusion for new directors.

The confirmation statement deadline is separate: you must file it within 14 days of the end of your review period, which runs for 12 months from either your incorporation date or the date of your last confirmation statement.

This is the area where we see the most complacency — and the most unpleasant surprises. Late filing penalties for annual accounts are automatic. Companies House does not send a warning letter first; the penalty is triggered the day after the deadline passes, and the amount increases the longer the delay continues.

For private companies, the penalty structure is broadly as follows:

• Up to one month late: £150
• One to three months late: £375
• Three to six months late: £750
• More than six months late: £1,500

These figures double if your company has been late in the previous filing year — so a pattern of lateness compounds quickly. Public companies face higher penalty tiers.

Beyond the financial penalties, persistent failure to file can result in the company being struck off the register. That sounds administrative; in practice it means the company ceases to exist as a legal entity, which has serious consequences for bank accounts, contracts, and assets. In the most serious cases, directors can face criminal prosecution — a rarely used sanction, but a real one.

The confirmation statement carries a separate regime: failure to file is a criminal offence for both the company and its directors, and can also trigger a striking-off notice. It is a lighter administrative task than the accounts, but it carries the same category of legal consequence if ignored.

A common misconception is that qualifying as a small or micro company means fewer obligations altogether. In reality, size exemptions affect the content of what you file, not the obligation to file itself.

Small companies (broadly, those meeting at least two of: turnover under £10.2 million, balance sheet total under £5.1 million, fewer than 50 employees) can file abridged accounts — a simplified balance sheet without the profit and loss account on the public record. Micro-entities (turnover under £632,000, balance sheet under £316,000, fewer than 10 employees) can file even simpler accounts using FRS 105.

What the exemptions do not do is move your filing deadline, remove the requirement to prepare full accounts for shareholders, or eliminate the confirmation statement obligation. Many small company directors see "abridged" and assume it means "less to worry about" — and it does mean less information goes on the public register, which is often a legitimate commercial choice. But the compliance calendar remains the same.

Dormant companies are another area worth flagging. Even a dormant company — one that has had no significant accounting transactions during the year — must still file dormant accounts and a confirmation statement annually. The accounts themselves are very short, but the obligation does not disappear simply because the company was not actively trading.

The annual accounts and confirmation statement are the baseline, but a number of other Companies House filings can be triggered by changes in the company's circumstances during the year. Directors should be aware of these, even if they do not happen every year.

• Changes to directors or company secretaries — appointments and resignations must be notified to Companies House, typically within 14 days.
• Changes to the registered office address — must be filed, and the new address must be an effective address for receiving correspondence.
• Changes to share capital or shareholding — allotments, transfers, and changes to share classes each have their own filing requirements (often via an SH01 or similar form).
• Changes to the articles of association — if shareholders pass a special resolution to amend the articles, a copy must be filed with Companies House within 15 days.
• Persons with Significant Control (PSC) register updates — any changes to PSC information must be kept current on the company's own register and notified to Companies House.

As an Authorised Corporate Service Provider (ACSP), OD Accountants handles these filings directly — which means changes are submitted promptly and accurately rather than sitting on a director's to-do list. For growing businesses where the shareholding or director structure changes regularly, that matters more than most people realise until something gets missed.