Growth Shares for UK Start-Ups: When They Work and When They Don’t

Growth shares can be a neat way to reward people for the value they help create, without giving away the value that’s already been built. For UK start-ups, that matters when cash is tight, equity is precious, and every share class needs to pull its weight.

Used well, Growth Shares can work for founders, staff, and advisers who are helping the business grow. Used badly, they add cost, tax risk, and a lot of awkward drafting for no real benefit.

The simple question is whether your company has enough existing value, and enough growth ahead, to make the structure worth it. That’s what this post gets into, so you can see when growth shares make sense, and when another route is cleaner for your cap table, your investors, and the value you want to protect.

What growth shares actually do in a start-up

Growth shares are built for one job, they separate today’s value from future upside. That is why they come up so often in early-stage companies where the founders want to reward people without giving away the value already on the table.

The structure looks simple on the surface, but the detail matters. A good setup keeps the existing shareholders protected and gives new recipients a stake in the growth that comes later. That is the part that makes them useful, and also the part that can go wrong if the paperwork is sloppy.

How the hurdle value changes who benefits

The hurdle value is the starting line. Growth shares only start to participate once the company is worth more than that figure, so the first slice of value stays with the existing shareholders.

That matters because it protects what has already been built. If the company is worth £1m today and the hurdle is set at £1m, the growth shares do not touch that first £1m. They only benefit if the business grows beyond it. In practice, that means founders and investors keep the current value, whilst the growth share holder shares in the upside that comes next.

The hurdle is not a small detail, it is the whole point of the share class.

Set it too low and you hand over too much value. Set it too high and the shares stop feeling like a reward at all. That is why the valuation work behind these shares needs proper attention, especially where HMRC scrutiny or future fundraising is on the horizon. For companies that need a cleaner technical valuation, HMRC compliant growth share valuations can make the difference between a workable plan and a messy one.

Who growth shares are usually given to

Growth shares are most often used for people who are helping build the business over time. That usually means:

• Key employees who are close to the commercial engine of the company
• Directors who carry real operational risk and decision-making weight
• Founders, in some cases, where the share structure is being reshaped for a new round or a reorganisation
• Contractors who are tied into long-term delivery, not short-term project work
• Advisers whose input is strategic and ongoing, rather than occasional

The right structure depends on the role, the risk, and the length of contribution. A senior hire who is helping scale revenue over three years should not be treated the same way as an adviser who drops in once a quarter. If the cap table needs tidying before a round, managing EMI and growth share structures is often part of the conversation.

For many start-ups, the real question is simple, who is helping create the next layer of value, and how do you reward them without making a mess for everyone else? If that is the point you are at, Talk to an ICAEW-regulated Corporate Finance Adviser today.

When growth shares make sense for a growing UK business

Growth shares are not a neat fit for every company, and that is the point. They work best when you want to protect what has already been built, keep the cap table under control, and still give people a real reason to push for the next stage of growth.

The structure tends to make sense where there is value to ring-fence, upside still ahead, and a clear commercial reason for tying reward to performance. If those pieces are missing, Growth Shares can feel like an expensive way to solve a problem you do not really have.

You want to reward future growth without handing over full value now

This is where growth shares often shine. Founders want to keep control of the business, protect early value, and still give key people a proper stake in the upside. Growth shares let you do that, because the reward is linked to future growth rather than the value already sitting in the company.

That makes them useful when cash is tight and motivation matters. A senior hire, director, or long-term adviser can see a direct line between performance and reward, which is far more compelling than a vague promise of “something later”.

Used well, the structure helps you:

• Keep existing value with the founders while sharing new upside
• Avoid heavy early dilution when the business is still building momentum
• Give people a clear commercial target rather than an abstract bonus plan
• Reward the work that creates growth, not the value that already exists

The attraction is simple. You keep the steering wheel, but you give key people a reason to help you drive faster.

Your company already has enough value to justify a hurdle

Growth shares usually make more sense once the business has a meaningful base valuation. If the company is still at a very early stage, with little or no real value yet, the whole arrangement can feel forced. In that case, you may be building complexity for no useful return.

The hurdle should feel commercial. It should reflect the value that already exists, not a number chosen just to make the paperwork look clever. If the hurdle is too artificial, the shares stop feeling like a fair reward and start looking like a tax exercise with a dress code.

A sensible hurdle gives the company a clean dividing line:

Situation	What it usually means
Early business with little value	Growth shares can be unnecessary or awkward
Clear existing value and strong growth plan	The structure is easier to justify
Hurdle set on real commercial terms	The share class feels more credible

That commercial logic matters because the point is not to create a technical feature for its own sake. It is to separate current worth from future upside in a way that makes sense to everyone involved. If you need the valuation and structure aligned properly, Consult EFC can help you shape the numbers around the business, not the other way round.

You are planning for scale, investment, or an exit

Growth shares are often most useful when the business is gearing up for something bigger. Maybe you are building a stronger management team before fundraising. Maybe you want to align a small group of people around an exit. Maybe you need to keep key talent focused on value creation over the next few years.

That is where they can pull their weight. The right structure gives people a stake in the outcome without handing over broad ownership too early, and that can be especially helpful when founders want the team thinking like owners. It also helps if you are preparing for a sale and want the people driving growth to share in the result they help create.

The catch is balance. Terms that are too generous, too complex, or too restrictive can put off future investors. If the shares create friction in due diligence or muddy the cap table, they stop helping and start getting in the way. If you are already thinking about timing, control, and exit value, it is worth keeping an eye on how changes in tax and ownership rules may affect the broader picture, including 2026 BADR legislative changes.

If the plan is scale, funding, or exit, growth shares should support the next step, not complicate it.

When the structure fits, growth shares give founders a clean way to align the people building the business with the outcome they want. When they do not fit, the better answer is usually simpler, and that is exactly the kind of decision Consult EFC helps businesses make early.

The tax and legal issues that can trip people up

Growth shares can work well on paper, then fall apart on the tax and legal detail. That is usually where the problems start, because the commercial idea is simple, but the structure behind it is not.

If the valuation is weak, the documents are vague, or the tax treatment has not been thought through, the result can be ugly. You can end up with an unexpected tax bill, awkward questions from HMRC, or shareholders who think they own something very different from what the paperwork says.

Why valuation matters before you issue anything

A proper valuation is the starting point. If the shares are issued too cheaply, HMRC may treat the discount as employment income, not just a bargain price. That can create income tax and National Insurance issues straight away.

That is why the hurdle and the grant value need to be defensible. If the shares have more value than the company says they do, the discount can be taxed as pay. If the valuation is sound, you have a much better chance of keeping the future growth in the capital gains box, where it usually belongs.

A defensible valuation also protects everyone later. It reduces the risk of disputes when someone joins, leaves, or tries to argue the shares were priced unfairly. For a company that wants to avoid that mess, defendable EMI valuation strategies are often relevant even when the structure is not an EMI scheme, because the same valuation discipline applies.

If the number feels invented, HMRC is unlikely to be impressed.

A sensible valuation is not just a tax point. It is also a trust point. People are far less likely to argue with a number that has been properly worked through than one that looks like it was picked to suit the paperwork.

The difference between Capital Gains Tax and income tax

The aim is usually to have the return taxed as Capital Gains Tax, not as income. That is because CGT is often more favourable than income tax, especially where the value builds over time rather than arriving as part of pay.

But that treatment depends on the facts and the structure. If Growth Shares are granted too cheaply, or in a way that looks like disguised remuneration, HMRC may say part of the value is actually earnings. That is where the price gets sharper for the recipient, and the admin gets messier for the company.

A simple way to think about it is this, if the shares are a genuine stake in future growth, CGT treatment may be available on sale. If they are really a reward for work already done, the tax position can look much more like income.

The difference matters because the wrong setup can hit both sides:

• For the recipient, it can mean a larger tax bill than expected.
• For the company, it can mean payroll reporting, NIC exposure, and more questions later.
• For the cap table, it can create a structure that looks clean until someone tries to exit.

If you want the setup to be robust, the tax treatment has to match the commercial story. That is where calculating option share value for HMRC becomes a useful reference point, because the valuation logic and HMRC mindset are closely linked.

Why the paperwork has to match the commercial plan

The legal documents have to say what the business actually means. If they do not, the scheme turns fuzzy fast. That is when disputes start, usually at the worst possible time, like when someone leaves, the company raises money, or a sale is on the table.

The key points need to be clear from day one:

• Legal rights attached to the shares should be set out properly, including dividends, voting, and what happens on exit.
• Leaver rules need to be precise, so everyone knows what happens if someone resigns, is dismissed, or leaves under different circumstances.
• Vesting terms, if used, should match the reward timeline, not some generic template.
• Shareholder documents should align with the articles, the company’s commercial plan, and any future fundraising plans.

If the documents are vague, people fill the gaps with their own assumptions. That is rarely a good outcome. One person thinks the shares are locked in, another thinks they can be bought back, and a third assumes the company can ignore the issue until the next round. That is how simple plans become expensive arguments.

The legal drafting also needs to fit the future, not just the launch date. Growth shares that work nicely in year one can become a problem if a new investor wants clean rights, or if the company is sold and the buyer wants every class of share explained in plain English.

If you are at that point, Talk to an ICAEW-regulated Corporate Finance Adviser today. Consult EFC can help you shape the tax, valuation, and legal structure so the paperwork reflects the real commercial plan, not just a tidy-looking template.

When growth shares are the wrong tool

Growth shares look neat when you want to ring-fence current value and share future upside. But neat does not always mean right. In some businesses, they add layers of paperwork, valuation debate, and expectations that are hard to satisfy.

The wrong structure can be worse than no structure at all. If the company is too early, the team needs cash now, or the cap table needs to stay clean for investors, Growth Shares can get in the way of the real commercial goal.

The business is too early, uncertain, or hard to value

If the company has little track record, the hurdle can become guesswork. You are trying to fix a starting value for something that still has a lot of moving parts, which is awkward at best and flimsy at worst.

That is where Growth Shares often start to lose their appeal. The valuation work can eat up time, the documents can become over-engineered, and nobody really feels confident about what the shares are worth. In a very early business, a simpler incentive is often easier to explain, easier to manage, and easier to defend.

A basic route can be better when:

• the company has no stable valuation yet
• revenue is still unpredictable
• founders are still changing the business model
• the commercial plan is not settled

In those cases, Growth Shares can feel like a clever answer to a question the business is not ready to ask.

The team needs liquidity, not just upside

Some people need cash now, not a theoretical share of value that might matter in three years. If the company cannot offer a realistic route to money, the incentive may look good on paper and feel weak in practice.

That is the key issue. A reward only works if the person can see how it turns into something useful. If the company is not likely to exit soon, or cannot create a proper liquidity event, Growth Shares may not motivate the person in the way you hoped.

If the upside is too distant, the incentive starts to feel like a waiting game.

This matters most where the person is taking real risk today. They may want certainty, not a long-dated promise with a hurdle attached. In that situation, salary, bonus, or a different equity route may fit the role better. If you want a structure that matches the real commercial need, Talk to an ICAEW-regulated Corporate Finance Adviser today.

Future funding could be harder if the terms are awkward

Investors will look closely at any share rights already in place. They want to know who owns what, what happens on exit, and whether the cap table is clean enough for the next round. If Growth Shares are badly designed, they can create confusion over dilution, control, and value sharing.

That is where the tax angle is not enough on its own. A structure can be technically tidy and still be a headache in a fundraising process. If a new investor has to spend time untangling share classes, asking who gets what, or renegotiating rights, the deal gets slower and harder.

A deal-friendly structure matters as much as tax efficiency. Before issuing anything, ask whether the share class will still make sense when someone else is scrutinising it under a microscope. If the answer is no, you probably need a cleaner route.

You want the arrangement to do three things well:

1. Reward the right people.
2. Keep the cap table understandable.
3. Leave room for the next round without a fight.

If it fails any of those, Growth Shares are probably the wrong tool for the job.

Better alternatives to compare before you decide

Growth Shares are useful, but they are not the only route. In plenty of start-ups, a cleaner answer is sitting right next to them, and it may fit the business better, the person better, and the cap table better.

The real question is not “can we use Growth Shares?” It is “what are we trying to achieve?” If you want to reward employees, keep ownership simple, or avoid another layer of drafting, there may be a better fit. If you want the right structure for your team and your growth plan, Talk to an ICAEW-regulated Corporate Finance Adviser today.

EMI options when you want a simpler share incentive

For qualifying trading businesses, EMI options are often the cleaner choice. They are familiar, tax-efficient, and designed for employees who are helping build value over time. That makes them a strong fit when you want an incentive plan that feels practical rather than over-engineered.

The big advantage is straightforward. The employee gets the right to buy shares later, usually at a fixed price, which keeps the link between performance and reward clear. You also avoid giving away immediate equity before the company is ready for it.

EMI can work especially well where:

• the business is a trading company that meets the qualifying rules
• the people you want to reward are employees, not contractors
• you want a recognised UK share incentive with clear tax treatment
• the company is still building value, but wants to reward future upside

That said, EMI is not for everyone. It comes with its own rules, limits, and admin, so it still needs proper setup. Even so, for many UK start-ups, it is the more natural route when the goal is to motivate staff without turning the cap table into a puzzle.

If the person is an employee and the business qualifies, EMI is often the first thing worth comparing.

Ordinary shares when alignment is more important than structure

Sometimes the simplest answer is the best one. Ordinary shares, used with the right vesting terms or shareholder agreement, can be enough when the person is a genuine long-term partner and the business wants direct alignment rather than a fancy wrapper.

This route works when everyone understands the commercial deal. The person is not just being rewarded for a task, they are helping build the business over time. In that case, plain shares can feel more honest and easier to run.

A simple ordinary share setup can be a good option when:

• you want a small number of real owners, not a complex share class mix
• the person is close to the founders and behaves like a partner
• the business wants fewer moving parts on the cap table
• vesting or leaver rules are enough to protect the company

The trade-off is immediate ownership. That can be fine, but it means dilution happens now, not later. You also lose some of the neat separation that Growth Shares give you between current value and future upside.

A lot depends on the person and the business. If you are bringing in someone who is truly in the long haul, ordinary shares may be all you need. If the role is narrower, or the business wants to protect existing value, they may be too blunt.

Cash bonuses or phantom equity when shares are too complex

Not every incentive has to be real equity. Sometimes the smartest move is to keep the reward commercial and avoid the legal noise altogether. Cash bonuses, profit share, or phantom equity can work well when you want to motivate people without giving away ownership.

This is often the right call where the business wants speed and flexibility. There are fewer shareholder documents, fewer valuation debates, and no actual share rights to manage. For a busy founder, that can be a relief.

The trade-off is simple. You get less complexity, but you also give up direct ownership. That means the person may feel less tied to the company’s long-term value, especially if they were hoping for a genuine stake in the business.

A quick comparison helps:

Option	Best for	Main trade-off
Cash bonus	Short-term motivation and simplicity	Taxed like pay
Profit share	Reward linked to performance	No ownership
Phantom equity	Share-like upside without real shares	No real equity
Growth Shares	Future upside with protected current value	More legal and valuation work

These plans can be very useful when shares would create too much admin for too little gain. They are also easier to explain to people who care more about the payout than the cap table. The price, of course, is that they do not give the same sense of ownership that real shares can.

For many SMEs, that is the balance worth weighing. If you want reward without ownership, these alternatives may be the cleaner route. If you want the person to think and act like a shareholder, you need to look harder at equity-based options.

Conclusion

Growth Shares work best when they match the shape of the business, there is real value to protect, real growth ahead, and people in place who are helping create it. That is where they make sense, because they reward future upside without handing away the value already built.

They are not a default answer. If the company is too early, the valuation is weak, or the drafting is rushed, they can add cost and confusion without doing much useful work. The right structure is the one that fits the commercial story, not the one that looks neat on paper.

If you are weighing up Growth Shares, or trying to decide whether another route is cleaner for your cap table, Talk to an ICAEW-regulated Corporate Finance Adviser today. Consult EFC helps founders and SMEs put the right structure in place, so growth is rewarded properly and the details do not get in the way.