Employee Share Scheme Tax Calculator

Employee Share Schemes: Complete Tax Guide 2026

Overview of UK Employee Share Schemes

Employee share schemes allow employees to acquire shares in their employer on tax-advantaged terms. HMRC approves four types of employee share schemes: EMI, SAYE, SIP, and CSOP. Each has different eligibility rules, limits, and tax treatment. Unapproved (non-approved) options are not registered with HMRC and have no special tax advantages — gains are taxed as employment income at exercise.

In 2024/25, HMRC reported that 16,000 companies operated approved employee share schemes, with approximately 4 million individual employee participations. The most popular approved schemes by number of participants are SAYE (2.1m) and SIP (1.4m), while EMI dominates by value for private company employees.

EMI — Enterprise Management Incentive Options

EMI is widely regarded as the most tax-efficient share option scheme for employees of qualifying UK SMEs. Key features:

• Qualifying companies: Trading companies (or holding companies of trading groups) with gross assets of £30m or less and fewer than 250 full-time equivalent employees. Certain trades are excluded (financial services, legal services, farming, property development).
• Individual limit: £250,000 in unexercised EMI options at any time (measured at grant date market value).
• Company limit: £3,000,000 in outstanding EMI options at any time.
• Tax on exercise: No income tax or NICs if the option was granted at or above the market value agreed with HMRC. Options granted at a discount are taxed as employment income on the discount element only.
• CGT on sale: 10% via BADR (if the 2-year holding period from grant date is met and other BADR conditions satisfied); otherwise 18% (basic rate) or 24% (higher rate).
• HMRC registration: Must notify HMRC within 92 days of grant via ERS Online portal.
• Working time requirement: Employee must work at least 25 hours per week (or, if less, at least 75% of their working time) for the company.

SIP — Share Incentive Plans

SIPs have four types of share award, which can be used independently or combined:

SIP shares can be transferred to a Stocks and Shares ISA when they leave the plan (within 90 days), avoiding future CGT on growth. Employers get corporation tax relief on the cost of shares awarded.

CSOP — Company Share Option Plan

CSOP options were significantly improved from April 2023, doubling the individual limit from £30,000 to £60,000. Key features:

• Available to any company — no size or trade restrictions (unlike EMI)
• Individual limit: £60,000 in unexercised options (market value at grant)
• No income tax or NICs on exercise
• Options must be held for at least 3 years before exercise to retain the tax advantage
• CGT at 18%/24% (not 10% — BADR does not normally apply to CSOP gains unless separately qualified)
• Options must be granted at not less than market value at grant

Unapproved Share Options — The Tax Cost

Unapproved options have no HMRC registration requirement but attract the full employment income charge at exercise. When you exercise an unapproved option:

• The gain at exercise (market value minus exercise price, multiplied by shares) is earnings for income tax and NIC purposes
• Employee NICs: 8% on the gain within £12,570–£50,270, 2% above £50,270
• Employer NICs: 15% on the entire gain above the secondary threshold (£5,000)
• Income tax: 20%, 40%, or 45% depending on total income
• The employer can elect to transfer the employer NIC liability to the employee via a joint election — common in many unapproved schemes
• Further CGT applies on any additional gain between exercise and sale

HMRC Approval and Annual Reporting

All four approved schemes (EMI, SAYE, SIP, CSOP) require HMRC registration via the Employment Related Securities (ERS) Online portal. Annual reporting is mandatory for all employee share schemes — both approved and unapproved — by 6 July following the end of the tax year. The annual return (Form 42 equivalent, now filed via ERS Online) reports all option grants, exercises, lapses, vesting events, and share sales during the year. Failure to file can result in penalties of up to £5,000.

EMI: Must register options within 92 days of grant. Failure loses the EMI tax advantage from the date of grant — no discretion. SAYE/SIP: Must register the scheme before first offer. CSOP: Must self-certify by end of the tax year in which options are first granted.

Valuation for EMI Options

For EMI options to qualify for full income tax exemption at exercise, they must be granted at or above the "market value" of the shares agreed with HMRC's Shares and Assets Valuation (SAV) team. For private companies (the typical EMI grantee), there is no market price — shares must be valued by reference to the underlying company value. HMRC offers a free non-statutory valuation service (typically 2–6 weeks turnaround) for EMI purposes. An agreed valuation remains valid for 90 days from HMRC's agreement date. Equity incentive events (e.g. investment rounds, M&A activity) can trigger revaluations.

Business Asset Disposal Relief and the 2-Year EMI Holding Period

BADR (formerly Entrepreneurs' Relief) is available on EMI option gains if the 2-year holding period is met. Unlike ordinary shares where BADR requires ownership for 2 years before disposal, for EMI options the 2-year clock starts from the date the option was granted, not when it was exercised. This means an employee can exercise on the day of a company sale (e.g. an M&A exit) and still qualify for BADR at 10% if the grant was more than 2 years ago — a highly significant advantage for employees at companies approaching an exit. The BADR lifetime limit is £1 million (gains above this are taxed at 18%/24%).

Disqualifying Events for EMI

An EMI option can lose its approved status if a "disqualifying event" occurs. Key disqualifying events include:

• The company ceases to be a qualifying company (e.g. its gross assets exceed £30m, or it enters an excluded trade)
• The employee ceases to meet the working time requirement (25 hours per week)
• The employee acquires a material interest in the company (over 30%)
• The company alters its share capital or rights in a way that affects the option shares

After a disqualifying event, there is a 90-day window during which the option can still be exercised with full EMI tax advantages. After 90 days, exercise is treated as unapproved (income tax and NICs on the full exercise gain). Companies approaching events that may trigger disqualifying events (e.g. raising a large funding round that may push assets above £30m) should consider accelerating employee option exercises before the event.

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Sources & Methodology

This calculator uses 2025/26 income tax rates, NIC rates (October 2024 Autumn Budget), CGT rates (October 2024 Budget — 18%/24%), and BADR rate (10%). EMI notional employer NIC rate is 15% (from April 2025).

Official References

• HMRC — Tax and Employee Share Schemes
• HMRC — Enterprise Management Incentives (EMI)
• HMRC — Share Incentive Plans (SIP)
• HMRC — Capital Gains Tax rates 2025/26
• HMRC — Business Asset Disposal Relief