Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
Contents
- What Are Share Options, and Why Do Startups Use Them?
- How Do Share Options Work in Practice?
- What Should Be Included in a Share Option Agreement?
- Why Is Legal Advice Essential for Share Options?
- Common Mistakes with Share Options – And How to Avoid Them
- How Do Share Options Compare to Other Equity Tools?
- Practical Tips: Implementing Share Options in Your Startup
- Key Takeaways: Setting Up Share Options with Confidence
Thinking about how to motivate your first hires-or ensure your co-founder is along for the ride as your startup grows? If so, you’ll quickly stumble upon the concept of share options, a powerful tool that helps early-stage businesses reward team members and attract the very best talent (even if your cash reserves aren’t exactly bursting at the seams).
But what are share options really, how do they work, and-perhaps most crucially-how do you implement them without falling into a legal or tax tangle down the line?
In this guide, we’ll break down everything you need to know about share options in the UK startup landscape. Our aim? To take the confusion out of equity incentives, walk you through the key types of option schemes, and help you lay solid legal foundations right from the start. If you’re planning to launch, scale, or retain top talent in your business, keep reading to discover how share options can become your secret weapon.
What Are Share Options, and Why Do Startups Use Them?
Let’s start with the basics: share options (sometimes referred to as stock options or shareholder options) are legal contracts that give the recipient-the “option holder”-the right (but not obligation) to buy a set number of company shares at a future date for a fixed price (usually called the “exercise” or “strike” price). You won’t need a lawyer to tell you that cold, hard cash is usually king. But for many startups, keeping cash flow healthy while rewarding staff and founders for their efforts can be tricky-especially in the early stages. Enter share options, which offer:- An incentive to join an unproven or growing startup-early team members can share in the company’s potential upside.
- A way to retain and motivate staff-knowing you’ll get a real stake in the business if you stay or hit performance goals is a strong motivator.
- Alignment of interests-when the business succeeds and its share value rises, everyone benefits.
How Do Share Options Work in Practice?
When you grant a share option to an employee, founder, or consultant, you’re making a contractual promise that, subject to agreed terms, they can buy shares in your company in the future at the exercise price-even if the shares are worth more by then. If all goes well, the option holder can exercise their rights when the business grows, making a tidy profit or simply enjoying ownership in a more valuable company. Typically, a share option agreement will set out:- The number of options granted (i.e., how many shares they can buy in the future).
- The exercise price per share.
- Vesting conditions-such as how long someone must work in the business, or hitting performance milestones.
- The window for exercising those options.
- What happens if someone leaves the business (known as “leaver provisions”).
What Are the Main Types of Share Option Schemes in the UK?
In the UK, the government supports startups and SMEs through several tax-advantaged share schemes. The two most popular for fast-growth businesses are:1. Enterprise Management Incentive (EMI) Scheme
The EMI scheme is the gold standard for many UK startups. It:- Allows qualifying businesses to grant up to £250,000 worth of options per employee.
- Is designed to be tax-efficient for both the company and the employee-options are often granted and exercised with little or no income tax or National Insurance, and only Capital Gains Tax applies on sale of shares.
- Has specific eligibility criteria-your company’s gross assets must not exceed £30m and you can’t have more than 250 full-time employees.
2. Company Share Option Plan (CSOP)
CSOP is a government-approved alternative, especially if you don’t meet EMI criteria (for instance, if you’re a larger or more established company, or work in a sector not allowed under EMI rules). Key features include:- The ability to grant options up to £60,000 per employee.
- Similar tax advantages to EMI, provided options are held for at least three years.
- Inclusion of employees and full-time directors.
3. Non-Tax-Advantaged (or “Unapproved”) Share Option Schemes
If your start-up doesn’t qualify for EMI or CSOP (perhaps due to size, sector or ownership structure), you can still create a bespoke scheme. The advantage? Flexibility-these schemes can be designed for founders, advisors, or overseas team members. The downside? There’s no special tax treatment, so tax may be due at grant or exercise (it pays to get a clear tax picture early on). For a more in-depth dive into these schemes and what suits your business best, check out our article Do I Need An EMI Share Scheme?.What Should Be Included in a Share Option Agreement?
Your share option plan only works if it’s crystal clear-and properly documented. Every option grant should be formalised in a written share option agreement (sometimes rolled into an overall scheme or “option plan”), signed by both the company and the recipient. Important details to include are:- The number of options: How many shares could be purchased under the options?
- Exercise price: The fixed price per share (set now, exercised in the future).
- Vesting schedule: Will options vest over time (e.g. monthly over four years), or on achievement of milestones?
- Performance conditions: Are there targets or KPIs that must be met for options to vest?
- Good leaver/bad leaver provisions: What happens if someone leaves?
- Expiry date: How long do recipients have to exercise their options?
- Dilution: How does the grant affect other shareholders?
Why Is Legal Advice Essential for Share Options?
Between employment law, shareholder rights, HMRC rules, and company articles, there’s a lot to juggle. Here’s why getting specialist legal help before launching a share option scheme is a must:- Scheme selection: A lawyer can help you work out if EMI, CSOP or a custom plan is best for your situation-and draft accordingly.
- Tax mitigation: Making the wrong move can land both your company and your staff with an unexpected tax bill. Professional advice ensures compliance and maximises the available reliefs.
- Custom terms: Your team is unique. Work with an expert to tailor performance goals and vesting schedules that fit your business model and culture.
- Cap table integrity: A clear, enforceable scheme protects the ownership interests of all founders and investors-now and as you grow.
- Dispute prevention: Well-documented agreements reduce the likelihood of misunderstandings or legal fights between team members, founders, and investors.
Common Mistakes with Share Options – And How to Avoid Them
Share options can supercharge your business success, but only if you sidestep these pitfalls:- Unclear documentation: Vague or non-existent option agreements will lead to misunderstanding and sometimes costly legal battles. Always use detailed, signed agreements.
- Ignoring shareholder agreement or articles: Your scheme must align with your company's shareholders agreement and articles of association.
- Poor tax planning: Missing an EMI/CSOP opportunity or not complying with HMRC rules risks bigger tax bills and less incentive for your team.
- Not updating records: Make sure all grants, exercises, or lapses are recorded and communicated with other shareholders and Companies House, where required.
How Do Share Options Compare to Other Equity Tools?
Share options aren’t the only way to offer equity incentives in a UK business, but they are one of the most flexible and founder-friendly. Other popular options include:- Direct share grants-giving actual shares up front, rather than a future right to purchase.
- Phantom shares-contracts that mimic share value growth but don’t convey real ownership or shareholder voting rights.
- Restricted stock units (RSUs)-more common in US-based companies.
Practical Tips: Implementing Share Options in Your Startup
Feel ready to put a plan in place? Here’s a quick guide to kick things off:- Decide on your goals: Do you want to attract staff, reward founders, or incentivise contractors? Your goals shape the right scheme.
- Choose the right structure: Work with your adviser to pick between EMI, CSOP, or a bespoke plan for your needs.
- Get tailored legal documentation: Draft a share option agreement that covers all bases-vesting, leavers, performance conditions, cap table impacts and more.
- Consult an accountant: Make sure your plan fits with your tax strategy, and register with HMRC if using a tax-advantaged scheme.
- Communicate clearly: Walk each recipient through the terms-it’s vital they understand what they’re getting.
- Maintain good records: Track options granted, vested, exercised, or lapsed and keep your company register up to date.
Key Takeaways: Setting Up Share Options with Confidence
- Share options are a powerful tool to attract, motivate, and retain staff in growing businesses-aligning everyone’s interests in the company’s success.
- The main UK share option schemes-EMI and CSOP-offer valuable tax advantages if you meet the criteria, with custom plans also available when needed.
- Every share option grant needs a well-drafted, legally binding agreement which clearly explains how, when and at what price options can be exercised.
- Tax and legal compliance is essential: mishandling share options can mean disputes, tax penalties or even loss of HMRC approval.
- Always seek legal and accounting advice in advance-tailored to your business size, goals, and ownership ambitions.


