If you’re lending money to a family member’s business \u2014 or borrowing from one \u2014 without a properly documented agreement, you are building on sand. It doesn’t matter that you trust each other implicitly. HMRC, Companies House, and the insolvency regime do not care about your relationship. They care about documentation, substance, and whether the transaction stands up to scrutiny. The moment something goes wrong \u2014 a tax enquiry, a divorce, a business failure \u2014 an informal arrangement will be recharacterised in whichever way causes you the most pain.<\/p>\n
This article sets out the legal, tax, and practical steps required to formalise a related-party business loan in the United Kingdom, whether you’re on the lending or borrowing side.<\/p>\n
The single biggest mistake in related-party lending is treating it as a favour rather than a commercial transaction. Without proper documentation, HMRC can reclassify what you call a “loan” as a gift (triggering inheritance tax consequences), a distribution (triggering income tax), or an investment (changing the CGT treatment entirely). The borrowing company loses any entitlement to deduct interest payments against corporation tax. And the lender, if the business fails, may find themselves behind every other creditor \u2014 or denied a claim altogether.<\/p>\n
Formalisation protects both sides. For the lender, it preserves the right to recover money and claim capital losses. For the borrower, it substantiates the tax deduction on interest and demonstrates to future lenders or investors that the balance sheet is clean. For both parties, it prevents the relationship from imploding when money becomes contentious \u2014 which, statistically, it will.<\/p>\n
Before drafting anything, decide whether the funding is genuinely a loan (debt) or an investment in exchange for shares (equity). This isn’t a matter of labelling; HMRC will look at the economic substance. Key indicators that an arrangement is truly debt include:<\/p>\n
If “repayment” is contingent on profits, or the lender participates in upside growth, HMRC may treat it as equity regardless of what the paperwork says. This matters enormously: interest on genuine debt is deductible against corporation tax, whereas dividends on equity are not. Conversely, equity avoids the rigid repayment obligations that can strangle a cash-poor start-up. Choose deliberately, not by default.<\/p>\n
A related-party loan agreement should be executed as a deed<\/strong>, not a simple contract. The reason is practical: a deed carries a 12-year limitation period for enforcement, compared with 6 years for an ordinary contract. Given that family loans often run for extended periods with informal repayment, this additional runway is invaluable.<\/p>\n At minimum, the agreement must cover:<\/p>\n Corporation tax:<\/strong> The borrowing company can deduct interest payments against profits, but only if the loan is genuine debt at arm’s-length terms. The “transfer pricing” rules apply even to small companies in certain related-party contexts \u2014 particularly where one party controls the other.<\/p>\n Section 455 CTA 2010 (formerly Section 419 ICTA 1988):<\/strong> This is the UK’s equivalent of a “benefit extraction” anti-avoidance rule. If a close company (most owner-managed businesses) makes a loan to a participator (shareholder, director, or their associates), the company must pay a Section 455 tax charge of 33.75% of the loan amount to HMRC. This charge is repayable when the loan is repaid \u2014 but the cash-flow cost is brutal. The reverse scenario (participator lending to the company) doesn’t trigger Section 455, but the interest received is taxable income for the lender.<\/p>\n Inheritance tax:<\/strong> An outstanding loan from a family member to a business forms part of the lender’s estate for IHT purposes. If the business qualifies for Business Property Relief, the shares may be exempt \u2014 but the loan itself typically is not. This asymmetry catches families out regularly.<\/p>\n Capital gains tax:<\/strong> If the loan becomes irrecoverable and the lender makes a negligible value claim, a capital loss may be available \u2014 but only if the loan was made on genuine commercial terms and is properly documented. HMRC will refuse the claim if the arrangement looks like a gift dressed up as a loan.<\/p>\n In an insolvency, unsecured creditors are paid last \u2014 after fixed charge holders, preferential creditors, the prescribed part for unsecured creditors, and floating charge holders. A family lender without security is functionally making a donation to the insolvency practitioner’s fees.<\/p>\n Options for security include:<\/p>\n Directors of the borrowing company owe fiduciary duties under Sections 171\u2013177 of the Companies Act 2006. A loan from a connected party must be in the company’s interest, not merely convenient for the director. If the company later becomes insolvent, transactions with connected parties face heightened scrutiny. Undervalue transactions (Section 238, Insolvency Act 1986) and preferences (Section 239) can be unwound by a liquidator \u2014 with connected parties subject to a two-year lookback period rather than six months.<\/p>\n For loans to<\/em> directors exceeding \u00a310,000, shareholder approval is required under Section 197 of the Companies Act 2006. Fail to obtain it and the transaction is voidable.<\/p>\n Related-party lending can be a lifeline for a growing business and a reasonable investment for a family member with capital to deploy. But the margin between a legitimate commercial arrangement and a tax or insolvency nightmare is defined entirely by documentation and discipline. Get it right at the outset \u2014 on proper legal advice, with a deed, at arm’s-length terms, with registered security \u2014 and you protect the money, the business, and the relationship. Cut corners, and you risk losing all three.<\/p>\n Disclaimer:<\/strong> The information provided in this article is for informational purposes only and should not be considered financial or legal advice. Property and lending laws in the United Kingdom vary and may change over time. We always recommend consulting with a qualified solicitor and mortgage broker before entering into a property purchase or financial arrangement with another party.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Discover how to properly document related party business loans in the UK, covering essential legal requirements, HMRC tax implications, and security considerations to protect both lender and borrower.<\/p>\n","protected":false},"author":3,"featured_media":2964,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[],"class_list":["post-2963","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-small-business-hacks"],"_links":{"self":[{"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/posts\/2963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/comments?post=2963"}],"version-history":[{"count":5,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/posts\/2963\/revisions"}],"predecessor-version":[{"id":3293,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/posts\/2963\/revisions\/3293"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/media\/2964"}],"wp:attachment":[{"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/media?parent=2963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/categories?post=2963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chipkie.com\/uk\/wp-json\/wp\/v2\/tags?post=2963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
Tax Implications: HMRC’s Sharp Focus<\/h3>\n
Securing the Loan: Don’t Be an Unsecured Creditor<\/h3>\n
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Connected-Party Transactions and Directors’ Duties<\/h3>\n
Practical Steps to Protect Both Sides<\/h3>\n
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