Alphabet shares are one of the most widely used tools in UK owner-managed business tax planning. They allow different shareholders to receive different levels of dividend income, which can reduce the household's overall tax bill significantly. Used carefully, the structure is legitimate. Used loosely, it attracts HMRC challenge under the settlements legislation, the employment income rules, and in some cases both at once. This guide explains how alphabet shares work, where the legal risks lie, when the Arctic Systems protection applies (and when it does not), and what to consider instead when the structure looks shaky.
What Are Alphabet Shares and Why Are They Used?
Alphabet shares are separate classes of ordinary shares carrying different rights to dividends. For example, a typical structure might have:
- A ordinary shares held by the founder/director,
- B ordinary shares held by a spouse or civil partner, and
- C ordinary shares held by a business partner or family member.
Each class can receive dividends in different amounts, at different times, or not at all, depending on what the board declares.
The tax appeal is clear. If one shareholder pays income tax at the additional rate (45%) and another pays at the basic rate (20%) or has an unused personal allowance, the same company profit produces a materially smaller combined tax bill if it is distributed to the lower-rate holder. Used in a genuine business context, this is legitimate tax planning. The difficulty arises when the reality of who does the work, who takes the risk, and who the income really belongs to diverges from what the share register suggests.
The Class Rights Requirement Under Company Law
Before getting to the tax analysis, there is a company law point that is often skipped. Under s.629 of the Companies Act 2006, shares form a class if the rights attached to them are not in all respects uniform.
A fragile - and legally defective - structure occurs when companies issue A and B shares but fail to amend their Articles of Association to explicitly grant the directors the power to declare dividends on one class to the exclusion of the other. Without specific "discretionary dividend" or "differential dividend" clauses baked into the Articles, the rights remain uniform by default, meaning any dividend declared must legally be paid pari passu (equally) across all ordinary shares. HMRC routinely relies on defective drafting in enquiries to argue that differential dividends were invalidly paid under company law, stripping them of their tax status and recharacterising them as employment income or salary top-ups.
The Settlements Code: Why the Tax Label Is Not the Whole Story
The settlements legislation defines a "settlement" broadly: it includes any disposition, trust, covenant, agreement, arrangement, or transfer of assets. The definition is wide enough to catch a gift of shares between family members, including spouses.
Where a settlement exists, s.624 of the Income Tax (Trading and Other Income) Act (ITTOIA) 2005 provides that the income is treated as the settlor's income if the settlor retains an interest in the settled property. This is the provision HMRC relies on most often to challenge alphabet share income-splitting arrangements where the underlying value or control over income remains with the director.
If a director transfers B shares to a spouse with no real capital or voting rights simply to divert dividends, HMRC will argue the arrangement is a settlement, the working director is the settlor, and the dividend income should be taxed at the director’s marginal rate.
A separate but related risk arises from the PA Holdings litigation (PA Holdings Ltd v HMRC [2011] EWCA Civ 1414). In that case, the Court of Appeal held that payments structured as dividends to employees were, in substance, earnings, subject to income tax and National Insurance (NICs) as employment income. Where alphabet share dividends are paid in substitution for a salary or bonus, or are closely linked to an individual's personal revenue generation, that characterisation risk is real. The label "dividend" does not override the economic substance test.
When Arctic Systems Protects Spousal Dividend Splitting
he leading case on spousal alphabet shares is Jones v Garnett [2007] UKHL 35, commonly known as 'Arctic Systems'. The House of Lords held that while a spousal share arrangement was a settlement, the "outright gift exception" (now found in s.626 ITTOIA 2005) applied to protect the wife's dividend income.
The outright gift exception saves income from the settlor charge where one spouse makes an outright gift of an asset to the other, provided the gift is not merely a right to income (s.626(4)(b)). The Arctic Systems protection depends on the shares being "real shares" with genuine capital rights on a winding-up and, ideally, voting rights. A share carrying only a right to participate in dividends, with no capital value and no vote, is highly vulnerable to HMRC's argument that it is substantially just a right to income derived from the donor's services.
Key risk indicators include:
- Lack of economic substance: The shares lack capital entitlement on a winding up or genuine participation in a sale.
- Disproportionate returns: The dividend paid to the spouse is grossly disproportionate to any value or capital they brought to the business.
- Waivers and tracking: The pattern of dividend payments tracks the director's personal revenue generation precisely, or requires constant dividend waivers on the A shares to allow the B shares to be funded.
The ERS Overlay and the Vermilion Trap
Where alphabet shares are issued to anyone who is an employee or director, the Employment-Related Securities (ERS) regime applies. Following the Supreme Court's decision in HMRC v Vermilion Holdings Ltd [2023] UKSC 37, the ERS deeming provisions act as a bright-line rule: if an employer provides securities to an employee, they are irrefutably deemed to have been acquired in connection with employment.
This creates a critical structuring trap in owner-managed businesses. If the company issues/allots new B shares directly to a spouse who happens to be an employee or director, the Vermilion rule applies blindly, triggering an immediate employment tax event on any undervalue under ITEPA 2003.
The Pre-Sale Gifting Trap
One of the most significant errors in practice is gifting alphabet shares to a family member while a sale of the business is actively being negotiated.
If heads of terms are signed, the shares may be classified as "readily convertible assets" under employment income rules, meaning any discount from market value on the transfer triggers immediate PAYE and National Insurance rather than a capital gains tax (CGT) exposure. Furthermore, the minority discount that would ordinarily depress the value of a small holding collapses when a sale at a known price is imminent. The timing of any gift must be executed well ahead of any sale process.
What to Do Instead
Alphabet shares are not inherently wrong. A carefully structured arrangement with genuinely different class rights drafted into the Articles, a spouse with real economic exposure to the asset, and dividend levels that reflect commercial reality remains defensible under Arctic Systems.
However, where the structure is driven purely by aggressive income-splitting, two alternatives are often preferable:
- Growth Shares: Issued to a family member at a genuinely low value (reflecting a high hurdle rate that makes them worth very little on issue). When backed by a proper valuation and a s.431(1) ITEPA 2003 election signed within 14 days, this gives the family member a clean CGT stake in future upside with minimised settlements exposure.
- Commercial Remuneration: For family members who genuinely work in the business, paying a market-justified salary is fully tax-deductible, completely straightforward, and creates zero due-diligence friction on a future corporate sale.
We work with accountants and financial advisers on owner-manager structuring across the equity lifecycle, from initial incorporation through to exit planning. If an existing structure has alphabet shares and a sale or investment round is on the horizon, now is the time to review it.
Frequently Asked Questions
Are alphabet shares illegal in the UK?
No. Alphabet shares are a legitimate company law mechanism under s.629 CA 2006 for creating different classes of shares with different rights. The tax risk arises purely when the structure is used to divert income in a way that triggers the settlements legislation (ITTOIA 2005) or masks what is fundamentally employment income.
Does the Arctic Systems case mean my spouse's alphabet share dividend is safe?
Not automatically. Jones v Garnett protected the arrangement because the gifted shares conferred a genuine right to capital and voting, not just a right to income. If your spouse's shares carry no voting rights and no capital rights on a winding up, the Arctic Systems shield is largely compromised.
Can HMRC reclassify alphabet share dividends as employment income?
Yes, in some circumstances. Following PA Holdings Ltd v HMRC [2011] EWCA Civ 1414, dividends paid as a substitute for salary or bonus, or closely linked to an individual's employment performance, can be recharacterised as employment income and subjected to PAYE and National Insurance. The risk is highest where the dividend varies in line with personal revenue generation or replaces a conventional remuneration structure.
What is the settlements code and why does it matter for alphabet shares?
The settlements legislation in Part 5 Chapter 5 ITTOIA 2005 allows HMRC to treat the income of a "settlement" as the settlor's income rather than the recipient's. Section 620 defines a settlement widely, and a transfer of shares to a family member with the primary purpose of reducing a tax bill can fall within it. Where it applies, the dividends received by the spouse, civil partner, or other family member are taxed as if they remained the director's income.
What is the s.629 CA 2006 separate class problem?
Section 629 of the Companies Act 2006 requires that different share classes must have genuinely different rights. If A, B, and C shares all have identical articles except the letter, they may not constitute separate classes at law. HMRC and the courts look at the substance of the rights, not the label. A poorly drafted alphabet structure can collapse to a single class, removing the basis for differential dividend payments entirely.
To discuss whether your current share structure is defensible, or to consider a restructure ahead of a sale or further investment round, contact us. We advise owner-managers and their professional advisers across the full equity lifecycle.
