CGT And Joint Ventures, The S.13 "Apportioned Gain" Risk
- Adil Akhtar
- 4 minutes ago
- 16 min read
CGT and Joint Ventures: The Section 13 "Apportioned Gain" Risk in the UK
Where a UK resident individual holds more than 25% of a non-UK resident company that realises a chargeable gain, that gain may be apportioned to the UK participator and charged to Capital Gains Tax in their hands under TCGA 1992 section 3 (the provision formerly known as section 13). In joint ventures structured through offshore entities, this exposure can arise on a disposal made by the joint venture company even where no distribution has been paid to the UK partner.
What the Section 13 Charge Actually Is
The provision in question was originally section 13 of the Taxation of Chargeable Gains Act 1992. Finance Act 2019 substantially restructured Part 1 of TCGA 1992, and the same substantive rules now sit in sections 3, 3A, and 3C. Practitioners continue to refer to the "section 13 charge" colloquially, and HMRC's Capital Gains Manual at CG57200 onwards uses that historical shorthand. The article follows that convention, but the operative law for 2026/27 is sections 3, 3A, and 3C.
The mechanism is straightforward in principle. A non-UK resident company realises a chargeable gain. That gain, calculated under corporation tax principles rather than CGT principles, is apportioned to each UK resident participator whose direct or indirect interest (aggregated with that of connected persons) exceeds 25% of the company. The apportioned amount is then taxed on the UK participator as if it were a capital gain arising to them personally in the year the gain accrues to the company.
Critically, no distribution needs to be made. The charge arises at the point the company disposes of the asset, regardless of whether the proceeds are retained in the company, reinvested, or eventually distributed years later.
The Close Company Test
Section 3 applies only to gains accruing to a non-UK resident company that would be a close company if it were UK resident. A close company is one controlled by five or fewer participators, or by any number of participators who are also directors. For most commercially structured joint ventures between a small number of partners, this test is almost inevitably met. A two-party or three-party JV, or a consortium structure with four or five principals, will in the overwhelming majority of cases constitute a notionally close company.
This means the section 3 risk is not confined to elaborate offshore planning. It is present in the routine commercial JV, the straightforward acquisition vehicle, and the shared investment structure where two or three UK businesses form an offshore holding company to pool their interests in a venture.
The 25% Participator Threshold
Only a UK resident participator whose interest, aggregated with connected persons, exceeds 25% of the company falls within scope. A UK participant holding exactly 25% is not caught. One holding 25.1% is. This threshold means that in a four-party equal JV, each partner at 25% sits precisely at the boundary. Any slight deviation above 25% brings them within scope.
Indirect participators are also within the charge. A UK individual who holds a 35% stake in an intermediate UK company, which in turn holds 40% of the non-resident JV, has an indirect interest in the JV and may be within scope on an apportioned basis.
What this Widget is About: This interactive widget is designed to help UK taxpayers understand the often-overlooked Section 3 (formerly Section 13) "Apportioned Gain" rules, which can unexpectedly trigger a Capital Gains Tax charge on joint ventures held through offshore companies. It clearly outlines how you might be held liable for tax on a non-UK resident company's profit, even if no actual cash distribution has been paid out to you. To begin assessing your personal exposure, simply answer a few straightforward questions in the Quick Risk Profiler to see if your specific corporate structure falls within the scope of HMRC's stringent rules. If you find yourself at risk, you can then utilise the built-in Apportioned Gain Estimator by entering your ownership percentage and the company's gain to instantly calculate your potential tax liability for the 2026/27 tax year. Finally, be sure to explore the informative tabs at the bottom of the tool to learn about the core structural tests, available commercial defences, and the essential steps you must take to remain compliant.
Why Joint Ventures Are Particularly at Risk
The section 3 charge was introduced as an anti-avoidance measure, aimed at preventing UK residents from routing asset disposals through offshore companies to avoid UK tax. Over time, however, the provision has come to catch structures where no avoidance was intended, precisely because the original legislation did not require an avoidance motive to apply.
A joint venture structured through a company in the British Virgin Islands, Jersey, or another offshore jurisdiction, entered into genuinely for commercial reasons such as the need for a neutral holding location, shared liability protection, or to facilitate investment from third parties in non-treaty jurisdictions, may find itself squarely within section 3 if it realises a gain on any asset disposal during the life of the venture.
In practice, joint ventures that are most commonly exposed include: property acquisition vehicles where UK investors use an offshore company to hold UK or overseas real estate; private equity structures where a consortium of UK investors uses a Cayman or BVI entity to hold portfolio company shares; IP-holding structures where a non-resident company holds intellectual property that is subsequently sold; and trading joint ventures where the JV entity realises gains on disposal of assets used in the trade.
How the Gain Is Calculated and the Tax Applied
The gain is computed using corporation tax principles, not CGT rules. This means that indexation allowance, where applicable to pre-April 2018 acquisitions, is available in the computation. The resulting gain is then apportioned to the UK participator proportionately to their interest.
The apportioned gain is then charged to CGT on the participator at the rates applicable in 2026/27: 18% for gains within the basic rate band and 24% for higher and additional rate taxpayers on non-residential assets. Where the underlying asset is UK residential property, the same rates apply but the 60-day reporting obligation does not apply in this scenario, since the gain is attributable to the company rather than being a direct disposal by the individual.
The participator's annual exempt amount of £3,000 for 2026/27 is available against their net chargeable gains for the year, including any apportioned gains, in the usual way.
Consider a worked example. Two UK individuals each hold 50% of a BVI company, which is a notionally close company. The BVI company sells an investment asset in April 2026, realising a £600,000 gain under corporation tax principles. Each UK participator has 50% of the company's gain apportioned to them: £300,000 each. Both are higher rate taxpayers. After the £3,000 annual exemption, each faces a CGT liability of £71,280 (24% of £297,000). That liability arises even though neither has received a penny from the company.
CGT and Joint Ventures: S.13 Apportioned Gain Risks
Risk / Provision | Key Details | Legal Context / Result |
Section 13 TCGA 1992 (now Section 3): Attribution of Gains | Apportions chargeable gains made by non-UK resident companies to UK resident participators if the company would be a close company if it were UK resident. | Participators are treated as if a portion of the gain accrued to them based on their interest. No apportionment occurs if the interest (including connected persons) is $25\%$ or less. |
Residence Status of Joint Venture Vehicles | Focuses on whether JV vehicles (e.g., Eulalia or CIL) are resident in the UK or offshore based on where Central Management and Control (CMC) actually abides. | If CMC is in the UK, the vehicle is UK tax resident and subject to Corporation Tax; if CMC is outside the UK, the vehicle is non-resident, potentially triggering Section 13 attribution. |
Influence vs. Control (Wood v. Holden principle) | Clarifies the distinction between 'influence' (providing advice, suggestions, or parental oversight) and 'control' (the actual exercise of independent discretion by the board). | Established that a non-resident vehicle remains non-resident if its board makes high-level decisions, even if influenced by UK shareholders, provided the board's functions are not usurped. |
Exemptions for Commercial and Trading Activities | Section 13 does not apply to gains from assets used for a trade carried on wholly outside the UK or 'economically significant activities' involving staff and premises. | Section 3A/13(5) provides a 'motive defence' where the gain is not connected to a tax avoidance scheme and the JV has genuine economic substance. |
Apportioned Gain Reliefs and Adjustments | Statutory mechanisms ensure just and reasonable apportionment to reflect economic reality and prevent double taxation on subsequent distributions. | Includes relief under Section 3C/13(7) for tax paid on attributed gains and potential exemptions for non-UK domiciled individuals under the remittance basis. |
Not Sure How CGT Applies to Joint Ventures?
The general rule is one thing. What it means for you is another. Tell us your circumstances and one of our UK tax specialists will give you a straight answer on your own position. Free, no obligation.
The Post-2019 Reforms: The Avoidance Connection Test
Finance Act 2019 introduced a significant reform to the old section 13 framework. The unreformed rule applied simply on the basis of a participator holding more than the threshold interest in a non-resident close company that had realised a gain, with a motive defence available where the taxpayer could show neither the disposal nor the holding of the asset had a main purpose of UK tax avoidance.
The reformed provision introduces two conditions, both of which must be satisfied for the charge to apply. The gain must be "connected to avoidance" and it must not be "connected to foreign trade or other economically significant foreign activities."
What "Connected to Avoidance" Means
A gain is "connected to avoidance" unless it can be shown that neither the disposal of the asset by the company, nor the acquisition or holding of the asset by the company, formed part of a scheme or arrangements of which the main purpose, or one of the main purposes, was the avoidance of UK capital gains tax or corporation tax.
The burden sits with the taxpayer to displace the avoidance connection. Where the JV structure genuinely has no tax avoidance motive, that needs to be demonstrable from the facts and from the original decision-making around the choice of vehicle. HMRC will scrutinise the commercial rationale for the offshore structure, the identity of the investors involved, and whether the structure was put in place on external commercial advice for genuine non-tax reasons.
A JV structured offshore because the investors wanted neutral territory for dispute resolution purposes, or because a non-UK co-investor insisted on an offshore vehicle, or because the transaction required a structure acceptable to a foreign jurisdiction's requirements, will have a stronger basis for arguing the gain is not connected to avoidance than one where the sole apparent rationale was the offshore location of the holding company.
The Foreign Trade Exclusion
Even where a gain is found to be connected to avoidance, the charge does not apply if the gain is connected to foreign trade or economically significant foreign activities carried on outside the UK by the non-resident company. This exclusion is intended to protect genuine overseas trading entities from the charge.
Where the JV operates a real business outside the UK, employs staff, has premises, and generates revenue from customers in non-UK jurisdictions, the foreign activities test may protect gains arising from disposals connected to that activity. The exclusion does not help, however, where the JV's primary assets are UK-based, where the gains relate to UK property or UK-sited investments, or where the economic substance of the JV's activity is in the UK regardless of the offshore corporate wrapper.
Where the Charge Arises Most Commonly in Practice
The patterns that generate section 3 exposures in practice tend to follow recognisable commercial scenarios.
Offshore co-investment vehicles are the most common. Two or more UK entrepreneurs form a BVI or Cayman company to make a joint investment in a private company or portfolio of assets. The vehicle later sells one of its holdings at a significant profit. Neither investor considered the section 3 implications at the time the vehicle was established.
Overseas property joint ventures are a second common scenario. UK investors use an offshore holding structure to acquire overseas real estate, often at the recommendation of local advisers who are focused on the jurisdiction in which the property sits rather than the UK tax position of the investors. The property is subsequently sold, and the UK investors face an apportioned gain they had not anticipated.
The third scenario involves corporate groups where a UK parent company or director-shareholder holds an interest in a non-UK subsidiary or associated company as part of a group structure. Where that non-UK entity disposes of assets and the UK parent's interest exceeds 25%, section 3 may apply unless the corporate rate exemptions or treaty reliefs provide relief.
The Double Taxation Relief and Exit Mechanisms
HMRC recognises that the section 3 apportionment creates a potential double charge: the UK participator pays CGT on the gain when it accrues to the company, and would face further charge when they eventually dispose of their shares in the non-resident company (because the shares have increased in value by the amount of the retained gain). Section 3C of TCGA 1992 addresses this.
CGT paid in respect of an apportioned gain is allowable as a deduction in computing the chargeable gain on disposal of shares in the non-resident company, or may reduce the tax charged on a distribution within three years. Where the company pays out a dividend within three years of the section 3 charge arising, the participator can credit the CGT paid against any income tax on the dividend, to the extent of the overlap.
This relief mechanism works reasonably well in straightforward cases, but the computation becomes complex where gains have been apportioned over multiple years, where the shares in the non-resident company are held by a trust or another entity rather than the individual directly, or where the interest in the company has changed between the apportionment date and the exit.
What this Widget is About: This interactive explainer helps UK taxpayers understand the Section 13 (now TCGA 1992 sections 3, 3A and 3C) “apportioned gain” risk that can arise when they hold more than 25 per cent of a non-UK resident company involved in a joint venture. It clearly sets out when a chargeable gain made by an offshore company can be taxed on the UK participator even if no cash is distributed, together with the close-company test, the 25 per cent threshold and the post-2019 avoidance and foreign-activity conditions. Use the navigation tabs at the top to move between Overview, How It Works, Key Tests, the Tax Calculator, Risk Scenarios and practical action points. The built-in calculator lets you estimate your potential Capital Gains Tax liability for the 2026/27 tax year simply by entering the company’s gain, your percentage interest and your applicable rate. Always treat the results as illustrative only and seek tailored professional advice, as this widget has been created by Pro Tax Accountant for educational purposes.
What UK Participants in Offshore Joint Ventures Should Do
The first step for any UK person with an interest exceeding 25% in a non-UK company is to confirm whether that company would be close if it were UK resident. Most JVs with a small number of participants will meet this test.
The second step is to review whether any asset disposals by the company in the current or recent accounting periods have given rise to chargeable gains under corporation tax principles. This requires access to the company's financial information, which in a tightly structured JV should be available to a 25%-plus participator in any case.
Where section 3 may apply, the question of whether the avoidance connection can be displaced needs to be assessed against the original documentation for the structure:
board minutes, investment memos, legal advice, and the commercial context in which the offshore vehicle was created and maintained. That documentation should be prepared and preserved now if it does not already exist, not assembled retrospectively when HMRC asks for it.
The section 3 gain must be reported on the UK participator's Self Assessment return for the tax year in which the gain accrues to the company, regardless of whether a distribution has been received. Failing to report it is an undisclosure of a chargeable gain, carrying the standard penalty and interest consequences.
For new JV structures being created during 2026/27 where an offshore vehicle is being considered, the section 3 position should be an explicit part of the tax advice on the proposed structure before it is implemented. The commercial rationale for the offshore vehicle and the tax position of each UK participant need to be addressed at the outset, not identified as a problem after the first asset disposal.
Key Takeaways
Section 3 of TCGA 1992 (formerly section 13) charges UK resident participators who hold more than 25% of a non-UK resident company on their proportionate share of gains realised by that company, applying at CGT rates in the year the company's gain arises, regardless of whether any distribution is made.
The charge applies only if the company would be close if UK resident, which most small joint ventures and co-investment vehicles will be.
Post-Finance Act 2019, the charge applies only where the gain is connected to avoidance and is not connected to economically significant foreign activities. The burden of displacing the avoidance connection sits with the taxpayer and requires documented commercial rationale for the offshore structure.
The CGT rates for 2026/27 are 18% for basic rate and 24% for higher and additional rate taxpayers on non-residential gains, with the £3,000 annual exemption available.
Credit for section 3 CGT is available against a future gain on disposal of the shares or against income tax on a distribution within three years. The computation of that credit is complex and requires careful tracking of the apportionment history.
Any UK participant in an offshore JV with more than a 25% interest should review each year whether the company's disposals give rise to an apportioned gain that must be self-assessed.
FAQS
Q1: How does the s.13 apportioned gain risk typically arise in a UK joint venture structured through an overseas company?
A1: Well, it's worth noting that many business owners I advise set up joint ventures using a non-UK resident company to hold assets or carry on activities, often for commercial or tax efficiency reasons. The risk kicks in if that company would qualify as a 'close company' if it were UK resident, broadly, controlled by five or fewer participators. If it realises a capital gain, a proportionate share can be attributed directly to UK resident participators who hold more than a 25% interest (together with connected persons). In my experience with clients in property development JVs, this has caught people off guard when selling a commercial site held offshore, leading to an unexpected personal CGT bill even if no dividends were paid out. Always map out the participator interests early.
Q2: What practical steps can a self-employed developer take to mitigate the s.13 risk when entering a joint venture with international partners?
A2: In my experience with self-employed clients in Manchester who team up with overseas investors, the key is structuring thoughtfully from day one. Consider using a UK transparent vehicle like a partnership or LLP where possible, so gains flow directly without attribution rules. If an overseas company is essential, ensure no single UK participator (with connections) exceeds the threshold, or explore genuine commercial reasons that might qualify for exemptions. One freelancer I advised restructured by bringing in an independent director and diluting interests, it took some negotiation but avoided a nasty surprise on exit. Document everything commercially, as HMRC looks closely at substance.
Q3: Does the s.13 apportioned gain apply differently if the joint venture involves UK property versus other assets?
A3: It's a common mix-up, but the rules have nuances here. For UK residential property, non-resident CGT (NRCGT) might take priority in some cases, but any remaining gain can still be apportioned under s.13 to UK participators. With commercial property or shares, the full attribution risk often bites harder. I've seen a Leeds-based client in a JV holding mixed assets face partial attribution only after NRCGT on the residential element, it required careful allocation. For high-earners, review the asset mix annually, as post-2025 rules emphasise economic interest over formal ownership.
Q4: How might Scottish taxpayers or those with income in multiple UK nations face additional considerations with s.13 gains from a joint venture?
A4: Scottish clients often forget the residency rules interact with devolved tax rates. The apportioned gain counts as a UK CGT liability, but your overall tax position, including Scottish income tax bands, affects the effective rate on the gain. In practice, I've advised business owners splitting time between England and Scotland: the gain is attributed based on UK residency at the time it accrues to the company. One client with cross-border income found their higher Scottish rate applied to the slice, plan your residency carefully and consider timing of any JV disposal.
Q5: What happens if a UK participator in a joint venture company emigrates before the gain is realised, does s.13 still apply?
A5: This is one of those edge cases that trips people up. The attribution looks at your residency or ordinary residency status at the precise time the gain accrues to the non-resident company. If you've genuinely left the UK and severed ties before that date, you may escape it, but HMRC scrutinises 'temporary non-residence' rules. I've had high-earning clients who timed exits from JVs post-emigration successfully, but only after robust advice and documentation. It's not a simple loophole; get specialist input to avoid retrospective challenges.
Q6: Can losses in the joint venture company offset apportioned gains under s.13 for a UK taxpayer?
A6: Unfortunately, it's not always straightforward. Only certain allowable losses of the non-resident company can reduce the attributed gain, and they must be computed as if the company were UK resident. In one case with a client running a tech JV, accumulated trading losses didn't directly help against a capital gain on asset disposal. The practical tip is to track company-level losses meticulously and consider whether group relief or other structures could apply indirectly. Don't assume symmetry, run the numbers with your accountant before any exit.
Q7: How does s.13 interact with entrepreneurs' relief or business asset disposal relief in a joint venture context?
A7: This is a frequent question from business owners hoping to claim relief on their attributed share. You may still qualify if the underlying conditions (like trading status and holding period) are met at your level, but the JV structure can complicate the 'personal company' tests. I've seen shop owners in Birmingham benefit by ensuring the JV's activities support their own qualifying business, but indirect holdings often need extra care. Review the specific relief criteria against the apportioned gain, it can save a significant chunk but requires precise planning.
Q8: What reporting obligations arise for a UK individual receiving an apportioned gain from a joint venture company?
A8: You must declare it on your Self Assessment tax return in the year the gain accrues to the company, even if no cash has changed hands. It's treated as if the gain arose directly to you. Clients often underestimate the admin, one property investor nearly missed the deadline and faced penalties. Keep detailed records of the company's computations, your interest percentage, and any connected persons. It's wise to file proactively and consider payments on account if the liability is large.
Q9: Are there particular pitfalls for high-earners or those with multiple joint ventures regarding s.13 aggregation?
A9: High-earners with several JVs need to watch aggregation of interests across connected entities. Connected persons rules can push you over the 25% threshold unexpectedly. In my practice, a client with stakes in two related overseas property JVs faced combined attribution that wiped out annual exemptions elsewhere. The takeaway? Consolidate your ownership overview yearly and explore arm's-length structuring where genuine. It's a classic area where proactive review prevents a disproportionate tax hit.
Q10: When should someone in a joint venture seek professional advice to check for s.13 exposure, and what should they prepare?
A10: Ideally before signing the JV agreement, and again before any major disposal or restructuring. Prepare company ownership charts, asset details, residency timelines, and projected gains. I've helped many business owners avoid issues by stress-testing structures early, one gig economy entrepreneur with an international tech JV saved tens of thousands by tweaking participator rights. It's not about fear-mongering; it's about sleeping soundly knowing your venture supports your goals without hidden tax landmines. Always confirm your specific facts with HMRC or a qualified adviser.
About the Author:
Adil Akhtar, ACMA, CGMA, FCMA (membership ID is 990250923) serves as CEO and Chief Accountant at Pro Tax Accountant, bringing over 18 years of expertise in tackling intricate tax issues. As a respected tax blog writer, Adil has spent more than eighteen years delivering clear, practical advice to UK taxpayers. He also leads Advantax Accountants (registered with Companies House), combining technical expertise with a passion for simplifying complex financial concepts, establishing himself as a trusted voice in tax education.
Email: adilacma@icloud.com
Disclaimer:
The content provided in our articles is for general informational purposes only and should not be considered professional advice. Pro Tax Accountant strives to ensure the accuracy and timeliness of the information but makes no guarantees, express or implied, regarding its completeness, reliability, suitability, or availability. Any reliance on this information is at your own risk. Note that some data presented in charts or graphs may not be 100% accurate.
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