How To Value Shares In A Private Company (UK)

If you run a UK private company, sooner or later you’ll hit a question that sounds simple but can get complicated fast: what are our shares actually worth?

Maybe you’re bringing in a new investor, issuing equity to a co-founder, buying out a departing shareholder, or trying to agree a fair price for a share transfer. In all of these situations, you’ll need a sensible way to calculate the value of shares in a private company - and you’ll want to do it in a way that stands up to scrutiny later.

In this guide, we’ll break down the main approaches founders and SMEs use to value private company shares in the UK, what affects the price in the real world (it’s not just the maths), and the legal documents you should have in place so the valuation doesn’t turn into a dispute.

Why Valuing Shares In A Private Company Matters (And When You’ll Need It)

Unlike public companies, private companies don’t have a live market price. That means the “value” of shares is usually something you agree - ideally using a defensible method - rather than something you can simply look up.

In practice, share valuation comes up most often when:

• You’re raising investment (and issuing new shares to an investor).
• You’re issuing shares to a founder, employee or advisor (for example, as part of a sweat equity arrangement).
• A shareholder is leaving and there’s a buyback or transfer.
• You’re selling the company (share sale) or buying a stake from someone else.
• You’re doing tax-related reporting (often with HMRC involvement, depending on the scenario).
• There’s a dispute between shareholders about fairness.

This isn’t just a finance exercise. It’s also a risk management exercise.

If you and the other shareholders don’t agree on the process upfront, a valuation can become a flashpoint - particularly if someone thinks they’re being diluted unfairly, or paid too little on exit. That’s why it’s usually worth having a clear framework set out in your Shareholders Agreement.

Before You Start: What “Value” Actually Means For Private Company Shares

When founders ask how to calculate the value of shares in a private company, they’re usually talking about one (or more) of these concepts:

1) Enterprise Value Vs Equity Value

• Enterprise value is the value of the whole business operations (often before considering cash/debt in a simplified way).
• Equity value is the value belonging to shareholders (typically after accounting for things like net debt).

If your company has loans, director’s loans, or other liabilities, it can have a big impact on what the shares are worth.

2) Price Per Share Vs “Percentage Ownership”

A common trap is assuming that “10% of the company” automatically equals 10% of what you think the company is worth.

In reality, the price per share depends on:

• the type/class of shares (ordinary vs preference, voting vs non-voting, etc.)
• any rights and restrictions attached to shares
• whether the shares are a minority holding
• whether there are transfer restrictions (very common in private companies)

These rights and restrictions are often set out in your Articles of Association and in any shareholders arrangements.

3) Fair Market Value Vs A Negotiated Value

Sometimes you’re trying to estimate a theoretical “fair market value”. Other times you’re negotiating a price for a specific commercial deal (like investment on certain terms).

Both are valid - but they can produce very different numbers. “Fair market value” can also mean different things depending on context (including the specific HMRC rules that apply), so it’s important to be clear about which definition you’re using.

How To Calculate Value Of Shares In A Private Company: The Main Methods Used In The UK

There isn’t one universal formula for valuing private company shares. Instead, founders and SMEs typically use a handful of accepted approaches, depending on the company’s stage and the reason for valuation.

Here are the most common methods.

1) The Earnings Multiple Method (Profit-Based Valuation)

This is one of the most common approaches for established SMEs. In simple terms, you take a measure of sustainable earnings and apply a multiple.

Common earnings measures include:

• EBITDA (earnings before interest, tax, depreciation and amortisation)
• operating profit
• net profit (less common for valuation multiples, but sometimes used)

Example (very simplified):

• EBITDA (normalised) = £200,000
• Multiple = 4x
• Implied value (enterprise-ish) = £800,000

What affects the multiple? Things like:

• how predictable your revenue is
• customer concentration (one big customer can increase risk)
• growth rate
• industry and comparables
• how dependent the business is on you personally

Founder tip: Before you apply a multiple, “clean up” the earnings figure so it reflects a realistic, maintainable level of profit (often called normalising). For example, if you’ve run one-off expenses through the business, or your director salary is unusually low/high, it can distort the result.

2) The Discounted Cash Flow (DCF) Method (Forecast-Based Valuation)

DCF uses projected future cashflows and discounts them back to today’s value. It’s a classic valuation method, but it’s only as good as the assumptions behind it.

This method is more common when:

• you have reliable forecasts and stable cashflows
• you’re dealing with a larger transaction
• you need a more technical valuation for negotiations or reporting

Why SMEs find DCF tricky: small businesses often have volatile cashflow, evolving business models, and limited forecasting history. That doesn’t make DCF “wrong” - it just means it can be easier to argue about.

3) The Asset-Based Method (Net Assets Valuation)

If your business is asset-heavy (for example, property holding, equipment-heavy operations, or an investment company), an asset-based approach may make sense.

Typically, you’d look at:

• assets (property, equipment, stock, cash)
• minus liabilities (loans, taxes due, creditors)
• = net assets

Watch out: the “book value” on accounts may not reflect real-world value. Property might be worth more than the balance sheet shows. Equipment might be worth less. Stock may not be saleable at cost.

4) Comparable Companies / Comparable Transactions

This is where you look at valuation data for:

• similar companies in your industry (size, margins, growth)
• recent deals (companies sold, investments raised) with similar profiles

In the private SME space, this data can be harder to obtain, but it’s often a reality check on the multiple you’re applying.

5) The “Last Funding Round” Method (Startup-Style Valuation)

If you’ve recently raised investment, a practical shortcut is to use the price per share from the last round as a starting point.

But you’ll usually need to adjust if:

• it’s been a while since that round
• your performance has materially changed
• the new shares have different rights (for example, preference shares)

This is also where legal drafting matters, because different share rights can mean different economic value - even if the “headline valuation” sounds the same.

What Changes The Value Of Shares In The Real World (Minority Discounts, Share Rights, And Restrictions)

Even if you calculate a company valuation, the next step is working out the value of specific shares. This is where founders often get caught out.

Minority Discounts (And Why A 10% Stake Isn’t Always “Worth 10%”)

If someone holds a minority stake (and can’t control decisions, dividends, or an exit), a buyer may pay less per share than they would for a controlling stake.

This is commonly called a minority discount. It isn’t automatic, and whether (and how much) it applies will depend on the circumstances, including the share rights, transfer restrictions and how easy it is to realise value from the shares.

Share Classes And Rights

If your company has more than one class of shares (for example, ordinary and preference), you can’t assume each share has the same value.

Different shares can have different rights to:

• dividends
• capital on a sale (including liquidation preferences)
• votes and control
• information

These rights are typically set out in your articles and investment documents, and they can materially change the value.

Transfer Restrictions And The Need For A Clear Process

Most private companies restrict who can buy shares and how transfers happen. This can protect the business, but it also affects share value because it limits the pool of buyers.

In many SMEs, the cleanest way to handle changes in ownership is to have a clear Share Transfer process and pre-agreed rules around valuation and buyouts.

Drag-Along, Tag-Along, And Exit Rights

If the majority can force a sale (drag-along), or minority holders can join a sale (tag-along), this can influence how attractive the shares are - and therefore how valuable they may be to a buyer.

These terms are usually addressed in a shareholders agreement rather than “informal understandings”, because verbal agreements can become messy when money is on the table.

The Legal And Practical Steps To Value Shares Without Creating A Dispute

Valuation isn’t just about getting to a number - it’s about ensuring you can justify the number and execute the transaction properly.

Here are practical steps that help founders and SMEs value shares more smoothly.

1) Be Clear On The Reason For The Valuation

Are you valuing shares for an investment round, a leaver buyout, a transfer to family, or a sale of the business?

The “right” method (and the acceptable level of approximation) can differ depending on the context. What’s reasonable for an early-stage investment negotiation may not be appropriate for a shareholder dispute.

2) Agree The Method In Advance (Ideally In Writing)

If you already have multiple shareholders, it’s smart to agree:

• when a valuation is triggered
• what method will be used
• whether an independent valuer is required
• who pays valuation costs
• how disputes are resolved

This is exactly the kind of thing a properly drafted Shareholders Agreement can cover, so you’re not renegotiating the rules during a stressful exit.

3) Check Your Company’s Documents Before You Promise A Price

Before you offer shares to anyone, or agree to buy someone out, check:

• your Articles of Association (transfer restrictions, pre-emption rights)
• any shareholders agreement (valuation clauses, leaver provisions)
• any existing investor rights (consents required, different share classes)

If you’re issuing new shares (rather than transferring existing ones), you may also need board approvals and compliance steps.

4) Document The Deal Properly

If you’re selling shares or buying shares, you’ll typically want the deal documented in a way that clearly sets out:

• price and payment terms
• warranties (what the seller is promising about the shares/company)
• completion steps and timelines

For larger transactions, a Share Sale Agreement can be the right tool, especially where the buyer expects protections and clarity around risk.

5) Don’t Ignore Tax And Accounting Input

Share value can have tax consequences, and HMRC may have specific valuation rules depending on the scenario. It’s worth speaking with your accountant (and, where needed, getting legal advice) before you lock in a valuation for anything involving:

• employees or advisors receiving equity
• gifting or family transfers
• complex share classes or investor rights
• company buybacks

6) Protect Confidential Information During Negotiations

Valuations often involve sharing financials, forecasts, customer information, and internal performance data.

Before you hand over that information to a potential investor or buyer, it’s usually sensible to have an Non-Disclosure Agreement in place to reduce the risk of sensitive information being misused.

Key Takeaways

• There’s no single formula for valuing private company shares - the best method depends on your company stage and the purpose of the valuation.
• Common ways to calculate the value of shares in a private company include earnings multiples, discounted cashflow, asset-based valuation, comparables, and using the last funding round as a benchmark.
• The value of shares isn’t just the company valuation divided by the number of shares - share rights, share classes, transfer restrictions, and minority positions can significantly affect price per share.
• To avoid disputes, agree valuation triggers and methodology upfront (ideally in a shareholders agreement) and check your Articles of Association before negotiating any deal.
• If you’re selling or buying shares, document the transaction carefully (for example, with a share sale agreement) and don’t forget the tax/accounting implications.
• When sharing financial or strategic information during valuation discussions, an NDA can help protect your confidential information.

Important: This guide is general information only and isn’t financial, tax, or accounting advice. Valuations can be highly fact-specific, and you should consider getting advice from a qualified accountant/valuer (and legal advice where appropriate) for your particular situation.

If you’d like help setting up a fair transfer process or putting the right documents in place (so you’re protected from day one), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.