Micro-entity, small company and full accounts: which applies

Understanding Your Accounts Filing Options

Every UK limited company must prepare and file annual accounts with Companies House and HMRC. The level of detail required depends on your company's size. There are three main tiers: micro-entity, small company, and full accounts (for medium or large companies). Understanding which category your business falls into is crucial, as it directly impacts your administrative burden, costs, and the amount of financial information you must make public. Micro-entities have the simplest reporting requirements, while small companies have slightly more complex obligations but can still benefit from significant reporting exemptions compared to larger businesses.

It's important to view these categories as a hierarchy. All micro-entities are, by definition, also small companies. This means a company that qualifies as a micro-entity can choose to file micro-entity accounts, small company accounts, or even full accounts. Similarly, a small company can choose to file small company accounts or full accounts. The decision is not just about meeting the minimum legal requirement; it's a strategic choice. Filing more detailed accounts than required might be beneficial if you plan to seek investment or apply for a significant bank loan, as it provides greater transparency and credibility. Conversely, filing the simplest accounts possible protects your commercial privacy and reduces accountancy fees.

This guide focuses on the rules for private companies limited by shares. For financial years starting on or after 1 October 2024, new, higher thresholds apply, making it easier for more companies to qualify for the simpler regimes. We will use these new thresholds throughout. Your decision will set the precedent for your company's public financial footprint, so it’s vital to assess your current situation and future ambitions before choosing which type of accounts to prepare and file.

Qualifying as a Micro-Entity

The micro-entity regime offers the most simplified accounting and reporting option for the UK's smallest companies. To qualify as a micro-entity, your company must meet at least two of the following three criteria for a financial year. The thresholds below apply for financial years beginning on or after 1 October 2024. If your financial year starts before this date, you must use the previous, lower thresholds. The 'balance sheet total' refers to the total value of your company's fixed and current assets, while the 'average number of employees' is calculated over the financial year.

The primary benefit of being a micro-entity is the significant reduction in administrative work. You prepare a much simpler set of accounts, saving time and potentially professional fees. However, this simplicity comes at the cost of detail. Micro-entity accounts provide very little information to the public, which can be a double-edged sword. While it shields your performance from competitors, it might also be perceived as a lack of transparency by potential lenders, suppliers, or investors who use Companies House records for due diligence. You must weigh the operational ease against your company's commercial and strategic needs.

• Public limited companies (PLCs).
• Companies involved in insurance or banking.
• Financial services companies, such as those involved in investment schemes.
• Charities.
• A parent company that is required to prepare group accounts.
• A company that is part of a group which exceeds the micro-entity size thresholds in aggregate.

Worth knowing: If your company meets two of the three criteria and is not in an excluded sector, you can choose the simplest form of accounts.

What's in Micro-Entity Accounts?

The content of micro-entity accounts is significantly stripped back compared to other types. When you file with Companies House, you are only required to submit a balance sheet with specific footnotes. You do not need to file a director's report or a profit and loss account. This is the key advantage for privacy, as it means your revenue, costs, and profitability are not displayed on the public record. The balance sheet itself is also simplified, following a prescribed format with fewer mandatory line items than a small or full company balance sheet.

While a profit and loss account is not required for the public file at Companies House, you must still prepare one for your own records and for HMRC. When you submit your Company Tax Return (CT600), you must include a full set of accounts, including a detailed profit and loss account, to support your tax calculations. Therefore, the simplification benefit is primarily about what is publicly disclosed, not about avoiding the need to calculate your profit for tax purposes. The accounts filed at Companies House must state that they have been prepared in accordance with the micro-entity provisions.

• A simplified Balance Sheet, signed by a director.
• The Balance Sheet must contain a statement confirming the accounts were prepared under the micro-entity provisions.
• Footnotes to the Balance Sheet (e.g., details on director advances, credit, or guarantees).
• No Director's Report is required.
• No Profit and Loss Account is required for the public record at Companies House.

Qualifying as a Small Company

If your company is too large to be a micro-entity but you still wish to avoid filing full accounts, the small companies regime is your next option. The qualification criteria are similar in structure to the micro-entity rules, but with substantially higher thresholds. A company qualifies as small if it meets at least two of the three criteria for the financial year. As with the micro-entity thresholds, the increased limits noted below apply to financial years beginning on or after 1 October 2024, representing a significant expansion of the regime.

Remember that the small company category includes all micro-entities. Therefore, if your company qualifies as a micro-entity, it automatically qualifies as a small company. You can then choose which set of rules to apply. Choosing to prepare small company accounts instead of micro-entity accounts can be a good middle ground. It allows you to present a more detailed financial picture to the outside world—including a director's report and a profit and loss account—which can enhance credibility, while still permitting certain information to be withheld from the public record at Companies House through 'filleting'.

Worth knowing: The small company regime offers a balance between reduced disclosure and providing sufficient information for stakeholders.

What's in Small Company Accounts?

Small company accounts provide a more comprehensive overview of a company's financial health than micro-entity accounts. A full set of small company accounts, prepared for the members (shareholders), must include a balance sheet, a full profit and loss account, notes to the accounts, and a director's report. The director's report provides a narrative context for the financial performance and position of the company. It must include information such as the names of the directors, a review of the business, and principal activities.

Crucially, small companies have options to reduce the amount of information placed on the public record at Companies House. This is known as 'filing filleted accounts'. When you fillet your accounts, you can remove the director's report and the profit and loss account. The filed document will consist of the balance sheet and the notes to the accounts. This keeps your turnover and profitability private, similar to a micro-entity, but the balance sheet and notes are more detailed. Small companies can also choose to prepare 'abridged' accounts, which are a simplified version of the balance sheet and/or profit and loss account, but this requires the approval of all shareholders every year.

• **Full Set (for members):** Director's Report, P&L Account, Balance Sheet, Notes.
• **Filleted Option (for Companies House):** Balance Sheet and Notes only. The director's report and P&L are omitted from the public file.
• **Abridged Option (for members & CH):** A simplified balance sheet and/or P&L. Requires annual shareholder consent.
• **Audit Exemption:** Most small companies are exempt from needing a statutory audit, unless required by their articles or shareholders.

Full Accounts: The Default for Larger Companies

If a company does not qualify as micro or small, it is classified as either medium-sized or large and must file full accounts. Full accounts provide a complete and transparent financial picture, including a detailed director's report (or a more extensive strategic report for larger companies), a full profit and loss account, a balance sheet, a statement of cash flows, and comprehensive notes. Most medium-sized and all large companies also require a statutory audit, where an independent auditor examines the accounts and provides an opinion on whether they give a 'true and fair' view.

While mandatory for larger businesses, any company, regardless of size, can choose to file full accounts. A small company might do this voluntarily to project an image of stability and transparency, which can be crucial when seeking significant funding, entering into major contracts, or preparing for a sale of the business. Banks and lenders often require full, and sometimes audited, accounts for credit applications above a certain level, even if the company would otherwise be exempt. Filing full accounts removes any questions about hidden performance metrics, signalling confidence and robust financial governance to external stakeholders.

The thresholds for a medium-sized company are considerably higher. To be classified as medium, a company must meet at least two of the three criteria below (for financial years beginning on or after 1 October 2024). Any company exceeding these will be classified as large. The accounting and reporting standards, especially under International Financial Reporting Standards (IFRS) which may apply to larger entities, are far more complex and demanding than the Financial Reporting Standard (FRS 102 with Section 1A or FRS 105) used by small and micro companies.

Changing Size: The 'Two-Year Rule' Explained

A company's size classification doesn't change the moment it crosses a threshold. To prevent businesses from frequently switching between regimes due to minor fluctuations in performance, the 'two-year rule' applies. This rule states that a company only changes its size category after meeting (or failing to meet) the criteria for two consecutive financial years. For example, if a micro-entity exceeds the micro-entity thresholds in one year but drops back below them in the next, it remains a micro-entity throughout.

This principle provides stability in your financial reporting. When a company is first incorporated, its size for the first financial year is determined by the thresholds for that year. If it qualifies as small in its first year, it will be treated as small. It must then fail to meet the small company criteria for two years in a row to become medium-sized. This forward-looking application of the rule can be confusing. The key is to assess your figures for the current year and the previous year. If you have met the criteria for a new, smaller size in both of those years, you can adopt the simpler regime in the current year. Conversely, if you have exceeded the criteria for your current size for two consecutive years, you must move up to the next regime.

1. 1

   **Year 1:** A new company is formed. Its results are: Turnover £800k, Balance Sheet £400k, 8 employees. It qualifies as a micro-entity and files micro-entity accounts.

2. 2

   **Year 2:** The company grows. Its results are: Turnover £1.2m, Balance Sheet £600k, 12 employees. It now exceeds all three micro-entity thresholds. However, because this is the first year it has done so, it can still file as a micro-entity under the two-year rule.

3. 3

   **Year 3:** The company grows again. Its results are: Turnover £1.5m, Balance Sheet £800k, 15 employees. It has now exceeded the micro-entity thresholds for two consecutive years. It no longer qualifies as a micro-entity and must now prepare, at a minimum, small company accounts.

4. 4

   **Conclusion for Year 3 Filing:** The company must now follow the small company regime. It can prepare full small company accounts and choose to 'fillet' them for Companies House, withholding the P&L and director's report from public view.

Illustrative Corporation Tax Scenarios

The type of accounts you file does not change the amount of Corporation Tax you owe, but the complexity of your business often correlates with both. Your accounting choice reflects the scale of your operations, which in turn determines which Corporation Tax rate applies. For the 2025/26 tax year, companies with profits up to £50,000 pay the 'small profits rate' of 19%. Companies with profits over £250,000 pay the 'main rate' of 25%. For profits between these two figures, a system of 'marginal relief' applies, resulting in an effective tax rate between 19% and 25%.

A typical micro-entity will likely fall into the 19% tax bracket, making its tax calculation straightforward. A growing small company, however, may find itself in the marginal relief zone. This requires a more complex calculation to determine the final tax liability, effectively creating a higher marginal tax rate on profits between £50,000 and £250,000. For example, the effective rate on this slice of profit is 26.5%. While your accountant handles the precise calculation for your CT600 tax return, understanding where your profits fall helps you forecast tax payments and appreciate the financial leap from being a 'small profit' company to one subject to higher rates.

Practical Filing and Common Mistakes

Regardless of the type of accounts, the filing deadline is the same: 9 months after your financial year ends. For your first set of accounts, the deadline is 21 months from the date of incorporation. Missing the deadline results in automatic penalties from Companies House, which increase the longer the delay. These penalties are levied against the company, and directors are legally responsible for ensuring filings are made on time. HMRC has its own, separate deadline for filing the Company Tax Return (CT600) and paying Corporation Tax, which is typically 12 months after the year-end for the return, but only 9 months and one day for the payment.

You can prepare and file the accounts yourself using Companies House's online service (for micro-entity and filleted small company accounts) or commercial software. However, due to the technical requirements and risk of errors, most directors use an accountant. An accountant ensures the accounts are compliant with the correct accounting standards (FRS 105 for micro-entities, FRS 102 Section 1A for small companies), that all calculations are correct, and that the appropriate claims and allowances are made for tax purposes. Making a mistake in your accounts can lead to their rejection by Companies House or an inquiry from HMRC.

• **Misunderstanding the two-year rule:** Applying a new size status after only one year of meeting the criteria.
• **Incorrectly calculating employee numbers:** This must be the monthly average of persons employed during the financial year, not the number on a single date.
• **Forgetting exclusions:** Attempting to file micro-entity or small accounts when the company type (e.g., a PLC or part of an ineligible group) is not permitted to do so.
• **Filing inconsistent information:** Submitting accounts to Companies House that do not match the figures sent to HMRC.
• **Missing shareholder approval:** Filing abridged accounts without having obtained the required consent from all shareholders.
• **Choosing the wrong accounting standard:** Using FRS 105 (micro-entity) when preparing small company accounts, which require FRS 102 Section 1A.

Common questions

Official sources & further reading

This guide draws on the official guidance below. Rules, fees and individual circumstances can change; check the relevant source before acting.

• Guidance: Life of a company: annual requirements
• The Companies Act 2006, Part 15, Accounts and Reports
• A guide to accounting standards for UK companies
• Small company accounts: an overview for directors

General UK information, primarily for private companies limited by shares. This is not personalised legal, tax or financial advice. An accountant or solicitor can help apply the rules to your situation.