How are growth shares valued for UK tax purposes?

Growth shares are a class of shares designed to participate in value above a specified threshold, commonly called a hurdle. They are often used to give directors or employees an interest in future growth without transferring the same participation in existing value as ordinary shares. However, the label is not a legal or valuation specification. The articles of association and related agreements determine whether the holder participates in sale proceeds, dividends, liquidation distributions or some combination of these. Two arrangements described as growth shares can therefore have materially different values.

For UK tax purposes, shares acquired because of employment may fall within the employment-related securities rules. The amount paid, the value acquired and the treatment of restrictions can affect the tax analysis. A valuation supplies evidence for that analysis; it does not establish that an arrangement qualifies for a particular tax treatment. The company’s tax adviser should identify the relevant statutory basis, transaction date and questions to be answered before the valuation is commissioned. A shareholder’s personal circumstances and the precise award structure may also matter.

The starting point is consequently not a percentage of the company’s headline value. It is a definition of the asset being valued: the number and class of shares, their rights, the other securities in issue and the assumptions applying to the transaction. A valuation of the whole company may be necessary, but it is only one stage. The resulting equity value must be allocated between classes in a way that reflects their different entitlements. Applying an ordinary-share price to growth shares without examining those entitlements can produce a misleading answer.

Reference framework:[1] IVSC[2] HMRC[6] ICAEW

No. A growth share can have no entitlement on an immediate sale at today’s equity value and still have a positive market value. A buyer may pay for the possibility that the company will exceed the hurdle later. That distinction separates current participation from the value of future participation. It is particularly important where a business has credible growth prospects, the shares have a long potential life or the holder can benefit from a wide range of successful outcomes. A calculation confined to today’s surplus above the hurdle ignores that future opportunity.

Consider a purely hypothetical company with current equity value of £4 million and growth shares participating only above a £5 million hurdle. An immediate sale for £4 million would produce no payment to those shares under that simplified arrangement. Nevertheless, a possible later sale for £8 million creates potential participation in £3 million of value above the hurdle. That £3 million is neither the current value of the growth shares nor necessarily their future entitlement: the participation percentage, dilution, timing and other contractual priorities still have to be applied.

The opposite mistake is to assume that every possibility of future growth creates a substantial value. A distant hurdle, weak commercial prospects, limited participation or a short contractual opportunity to benefit may reduce value considerably. Some circumstances can support a very low value, but that conclusion needs evidence rather than a statement that the shares are currently below their hurdle. The valuation should explain both the prospect of receiving proceeds and the risk of receiving nothing. It should also distinguish genuine uncertainty at the valuation date from an outcome that became apparent only afterwards.

Reference framework:[1] IVSC[2] HMRC[6] ICAEW

The distribution waterfall is central. This is the sequence in which sale or other distribution proceeds are allocated between shareholders and other entitled parties. A hurdle might be a fixed equity amount, an amount that increases with time or a return that must first be delivered to existing investors. Growth shareholders may receive a percentage of only the excess, or their participation may change once specified thresholds are reached. Dividend rights can differ from sale rights. Each feature changes the cash flows being valued and must be reflected in the allocation.

The valuation must also establish what happens when the capital structure changes. Further investment can introduce preference rights, dilute existing holdings or alter the hurdle. Options, warrants, convertible instruments and other employee share classes may compete for the same future proceeds. A cap table showing only issued ordinary shares may therefore be inadequate. The contractual basis of any stated participation percentage matters: a percentage of the current issued capital is not necessarily the same as a percentage calculated after outstanding options and convertible securities are included. The report should state which interpretation it uses.

Leaver provisions, transfer restrictions, compulsory transfer arrangements, voting rights and rights to compel or join a sale require separate attention. Their existence does not justify a standard discount. The economic effect depends on the actual wording, the applicable valuation basis and which restrictions must be taken into account or disregarded. Where the documents are ambiguous, the valuer should obtain clarification from the legal adviser rather than choose the most favourable interpretation. Drafting changes made after the valuation can alter its conclusion, even where the business forecast and headline hurdle remain unchanged.

Reference framework:[1] IVSC[2] HMRC[7] ITEPA 2003, section 431

The process normally starts with an assessment of the underlying business using methods appropriate to its characteristics and available evidence. Depending on the circumstances, that might involve maintainable earnings, forecast cash flows, assets or relevant transactions. The analysis then moves to the equity available to shareholders, taking account of debt, cash and other relevant claims. This distinction matters because a hurdle expressed by reference to equity proceeds cannot safely be compared with an enterprise valuation. The model must use consistent definitions throughout, including any contractual treatment of transaction costs or investor preferences.

The next stage allocates equity between the different securities. A scenario-based approach can model a range of future outcomes, apply the contractual waterfall to each and assess their present value using justified assumptions about risk and timing. An option-based approach can sometimes help where participation resembles a claim on value above a threshold. Neither approach is automatically right for every private company. The choice depends on the rights, the business, the expected route to liquidity and the reliability of the inputs. An elaborate model cannot compensate for an unsupported starting valuation.

Important assumptions can include the time to a liquidity event, uncertainty in future equity value, expected distributions, dilution and the interaction between different share classes. The model should be calibrated against relevant evidence where possible, including recent arm’s-length investment, while recognising that investors may hold superior rights. Sensitivity testing helps explain how changes in those assumptions affect the result. The final figure should emerge from a coherent valuation framework, not from selecting a convenient percentage of ordinary-share value or adding several overlapping discounts for risks already captured elsewhere.

Reference framework:[1] IVSC[2] HMRC[5] IPEV[6] ICAEW

Where the restricted securities rules are relevant, advisers may need to distinguish actual market value from unrestricted market value. Broadly, actual market value reflects the relevant restrictions, whereas unrestricted market value is assessed on the statutory assumption that relevant restrictions are removed. These are legal valuation concepts, not interchangeable descriptions of a low and a high estimate. The instruction should identify precisely which restrictions are disregarded and why. The open-market concept is important, but the applicable legislation and employment-related securities provisions determine the assumptions required for the particular tax calculation.

It is especially important not to assume that unrestricted market value means valuing growth shares as ordinary shares. A growth share’s economic participation and a restriction on the holder are not necessarily the same thing. Whether a particular hurdle or other provision defines the underlying rights, constitutes a relevant restriction or requires some other treatment needs legal and tax analysis. The valuer should work from that analysis and document the resulting assumptions. Automatically removing every provision that reduces value can be just as misleading as assuming every provision remains effective for every valuation basis.

A joint election under section 431 of ITEPA 2003 can change the tax treatment of restricted employment-related securities by disregarding specified restrictions for relevant purposes. Such an election does not itself establish market value, approve the arrangement or guarantee a particular treatment of future proceeds. It also has formal requirements and a time limit, so it should be addressed with the tax adviser before the acquisition. Where more than one valuation basis is required, the report should present the figures separately and explain the reason for any difference, including where the difference is small.

Reference framework:[2] HMRC[3] TCGA 1992, section 272[7] ITEPA 2003, section 431

Owners should not assume that growth shares have access to the same advance valuation arrangements as an EMI option grant. HMRC’s published guidance describes valuation agreement procedures for particular share schemes, and its EMI guidance addresses that specific context. A direct acquisition of growth shares does not become an EMI transaction simply because it rewards an employee. The tax adviser should confirm whether any agreement route is available for the actual arrangement. A privately commissioned report is supporting evidence, not an HMRC approval or a substitute for required reporting.

The valuation date is equally important. An old report is not automatically appropriate for a later award, particularly if trading, funding prospects or the capital structure have changed. A credible offer, a significant customer development or progress towards a financing round may affect what market participants would have considered at the relevant date. The analysis should use information known or reasonably knowable then, without simply importing later outcomes. If implementation is delayed, the company should ask whether the conclusion needs updating rather than assuming that a previous figure remains valid.

A defensible evidence file allows another professional to understand the reasoning without reconstructing the entire assignment. It should identify the purpose, date, share rights, business information, valuation methods, significant assumptions and limitations. It should also explain how relevant transactions were considered and why apparently conflicting evidence was accepted, adjusted or rejected. This does not prevent questions from HMRC, but it makes the response more grounded. Where a figure depends heavily on uncertain forecasts or unresolved drafting, the uncertainty should be visible rather than hidden behind a precise-looking number.

Reference framework:[1] IVSC[2] HMRC[4] HMRC[8] HMRC SVM110050

Begin with the proposed transaction and its timetable. Explain who will acquire the shares, whether they are subscribing for new shares or buying existing shares, the intended acquisition date and the valuation questions agreed with the tax adviser. Identify whether the documents are final or still being negotiated. A draft structure can be analysed, but the report must identify the version used and any conditions attached to its conclusions. The final issued rights should be checked against that version before anyone relies on the valuation for implementation.

The financial information should make the business understandable, not merely provide a spreadsheet total. Historic accounts, current management accounts and forecasts need a narrative explaining major changes in performance, customer concentration, financing needs and the assumptions supporting growth. Forecasts prepared for an optimistic incentive presentation may need scrutiny before they can support market value. Likewise, an expectation of a sale should be distinguished from an active sale process or a credible offer. These differences can materially affect the assessment of timing, uncertainty and prospective shareholder proceeds.

The legal and capital information must be equally complete. Provide all relevant share classes and instruments, not just the proposed growth-share terms. Ask the solicitor to resolve unclear waterfall provisions and the tax adviser to confirm the valuation bases required. Bringing these inputs together early reduces avoidable revisions and helps separate business valuation questions from legal interpretation. If information is unavailable, flag the gap explicitly so that its effect can be assessed rather than replaced with an undisclosed assumption.

• Latest accounts, management information, forecasts and an explanation of material commercial changes.
• Current and proposed articles, shareholder agreements, award terms and relevant leaver provisions.
• A complete cap table covering options, warrants, convertibles and investor preferences.
• Debt and cash information, funding requirements and evidence of recent investment or offers.
• Written confirmation of the valuation date, tax purpose and restrictions to be considered or disregarded.

Reference framework:[1] IVSC[2] HMRC[6] ICAEW[7] ITEPA 2003, section 431

An independent XVAL valuation separates the commercial aim of an incentive arrangement from the evidence needed to value it. The aim may be to reward growth or retain key people, but those objectives cannot determine the tax value. XVAL’s work is human and expert-led: it involves examining financial evidence, understanding the rights and applying professional judgement. It is not an automated calculator that assigns a value from a turnover figure and a hurdle. The analysis addresses the specific shares and the agreed valuation purpose.

A documented report connects the underlying business value to the allocation between shareholders and explains the assumptions that drive the growth-share conclusion. Where appropriate, it can distinguish valuation bases and show sensitivities to material uncertainties. XVAL works alongside the company’s solicitors, accountants and tax advisers, while leaving legal interpretation, tax elections and implementation advice with the relevant professionals. This division of responsibilities helps ensure that the report values the arrangement actually intended and that its conclusions are not mistaken for broader tax clearance.

XVAL reviews enquiries the same working day, helping establish the scope, required information and any immediate timing issues quickly. Delivery timing then depends on the complexity of the rights, the quality of the evidence and the readiness of the documents; speed should not mean overlooking a material assumption. For owners and finance teams, the practical benefit is a clear, independent record that can support implementation and later professional review. If the structure or circumstances change before acquisition, the valuation can be considered for updating rather than carried forward without examination.

Reference framework:[1] IVSC[6] ICAEW

Questions owners ask

Frequently asked questions

Reference desk

Sources & further reading

Legislation states the legal provisions; HMRC manuals describe HMRC’s guidance. Professional standards and research guides inform valuation practice. Illustrations and commercial checklists above are explanatory analysis, not prescribed legal formulas or market benchmarks.

1. [1]IVSC — International Valuation Standards
2. [2]HMRC — Shares and Assets Valuation Manual
3. [3]TCGA 1992, section 272 — Market value
4. [4]HMRC — Get a share scheme valuation
5. [5]IPEV — Valuation Guidelines
6. [6]ICAEW — Business and share valuation
7. [7]ITEPA 2003, section 431 — Restricted securities elections
8. [8]HMRC SVM110050 — Agreeing EMI valuations

This article provides general technical information, not legal, tax or investment advice. Its application depends on the facts, the valuation purpose and rules in force at the relevant date. A reference to a professional body does not imply XVAL accreditation or endorsement. All numerical examples are hypothetical, not XVAL fees, client results or market evidence.