What is a close company for UK tax purposes and why does it matter?

Full answer

The concept of a "close company" exists in UK tax law specifically to prevent smaller, tightly-controlled companies from being used to inappropriately shift income or benefits to their owner-directors in ways that avoid the tax that would normally apply to salary, dividends, or benefits in kind. **The control test** A company is generally a close company if it is controlled by five or fewer participators (broadly, people with an interest in the company, usually shareholders, but the definition can extend to certain loan creditors and others with rights over the company), OR by any number of participators who are also directors, regardless of how many total shareholders the company has. In practice, this catches almost all small, family-run, and owner-managed limited companies in the UK -- a typical one, two, or three-director small company is almost always a close company. **Which companies are generally NOT close companies** Companies genuinely controlled by the public (typically larger, publicly listed companies with a widely dispersed shareholder base) are generally not close companies, since the whole point of the rules is to target concentrated, closely-held ownership and control -- a company listed on a main stock exchange with thousands of shareholders would not usually meet the close company control test. **Key consequence 1: the loans-to-participators (Section 455) charge** If a close company lends money to a participator (commonly a director-shareholder) and the loan remains outstanding nine months after the company's accounting period end, the company must pay a tax charge (aligned historically with the dividend upper rate) on the outstanding balance -- this charge is refundable once the loan is repaid, but represents an important cash-flow and planning consideration for any close company considering lending to its owners. **Key consequence 2: benefit in kind and interest rate rules** Close company status interacts with the beneficial loan rules (charging a benefit in kind if a director's loan carries interest below HMRC's official rate) and other specific anti-avoidance provisions designed to ensure that value extracted by owner-directors is taxed appropriately, rather than disguised as something else. **Key consequence 3: distributions and certain transactions** Close companies face specific rules around distributions to participators, and certain transactions (like a close company purchasing its own shares from a shareholder) have detailed conditions that must be met for favourable Capital Gains Tax treatment to apply, rather than the transaction being taxed as an income distribution instead. **Why this matters practically for small business owners** Most UK small business owners running their own limited company do not need to worry about WHETHER their company is close (it almost certainly is), but they do need to be aware of the specific rules that flow from close company status -- particularly around director's loans, since this is the area most likely to create an unexpected tax charge if not properly planned and managed. **Worked example** A two-director limited company (a classic small consultancy business) is a close company because it has two participators who are also directors. If one director borrows £20,000 from the company and it remains outstanding nine months after the company's year end, the company faces a Section 455 tax charge on that balance -- refundable once repaid, but a real cash cost in the meantime that many small business owners are caught out by if they are not aware of the nine-month deadline. **Practical tip** If you own and run a small limited company, assume it is a close company (the vast majority are) and structure any director's loans, benefits, or share transactions with the relevant close company rules in mind from the outset, ideally with input from an accountant familiar with owner-managed business taxation.

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More answers

• What is the loans to participators (Section 455) tax charge?
• What interest rate should I charge on a director's loan to avoid a tax charge?