Employee Share Schemes: Income Tax and CGT Explained

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Published on July 8, 2026

Employee share schemes are a powerful mechanism for expanding corporate ownership, aligning worker incentives with shareholder growth, and delivering flexible remuneration packages. The underlying UK tax code distinguishes sharply between statutory "tax-advantaged" frameworks and "unapproved" structures. Navigating these rules dictates exactly how much Income Tax, National Insurance, and Capital Gains Tax you will owe.

1. Statutory Tax-Advantaged Schemes

The UK government provides four primary tax-advantaged share structures. Each carries distinct individual limits, holding requirements, and eligibility profiles:

Enterprise Management Incentives (EMI)

Designed for higher-growth small and medium enterprises (SMEs) to help them recruit and retain key personnel.

Individual Capacity Cap: An employee can hold unexercised EMI options over shares worth up to £250,000 at the historical date of grant.
The Income Tax Protection: There is no Income Tax or National Insurance contributions (NICs) due upon the grant or the subsequent exercise of the option, provided the exercise price matches or exceeds the market value of the shares when the option was originally granted.
The 15-Year Life Limit: To preserve this tax immunity, options must be exercised within 15 years of the original grant date.

A discretionary option plan often deployed by larger corporations that do not clear the SME size thresholds required for EMI.

Individual Capacity Cap: Restricted to a maximum share value of £60,000 per person at the date of grant.
The Safe Harbour Holding Window: To completely escape Income Tax and NICs on exercise, you must hold the options for a minimum continuous window of three years from the date of grant. Exercises within the initial three years lose tax protection unless triggered by specific statutory "good leaver" events (such as redundancy or disability).

An all-employee scheme allowing individuals to acquire shares directly through partnership arrangements or employer awards.

The Sourcing Limits: You can buy up to £1,800 of "Partnership Shares" out of your pre-tax salary each year, and your employer can match this by awarding up to two "Matching Shares" for every partnership share bought. Companies can also award up to £3,600 of "Free Shares" per year.
The 5-Year Maturation Lock: If you leave the shares inside the protective SIP trust envelope for a minimum of five continuous years, they exit completely free from Income Tax and NICs.

Save As You Earn (SAYE)

A tax-advantaged, all-employee savings scheme linked to a bank or building society sharesave contract.

The Contribution Mechanics: You save a fixed sum between £5 and £500 per month out of your net pay for a continuous term of three or five years. At the end of the contract, you receive a tax-free bonus and use the accumulated cash to buy company shares at a pre-agreed discounted price (up to 20% below market value at the start of the scheme).
The Tax Shield: The option exercise itself triggers zero Income Tax or National Insurance exposure.

If your employer grants equity rewards outside of the four statutory umbrellas listed above, the scheme is legally classified as "unapproved." This structure offers no protection from employment taxes, shifting the primary liability point to the date you exercise your options:

The Date of Grant: No tax or NIC liabilities arise when an unapproved option is initially granted to you.
The Date of Exercise: The moment you exercise the option to acquire the underlying shares, the transaction is treated as a direct employment bonus. You face immediate Income Tax on the difference between the actual market value of the shares on that day and the exercise price you paid to acquire them.
The Collection Route: If the shares are considered "Readily Convertible Assets" (meaning they can be easily sold on an active stock exchange or via an internal corporate market), your employer must process this tax through the PAYE system. They will deduct the Income Tax and Class 1 Employee National Insurance directly from your monthly cash salary or execute a "sell-to-cover" trade, liquidating a portion of your new shares on the open market to fund the tax bill.

3. The Transition to Capital Gains Tax (CGT) upon Disposal

Once you physically own shares—whether acquired through a tax-advantaged or unapproved framework—any subsequent increase in their value from that acquisition point onward is governed by the Capital Gains Tax framework.

The True Cost Base Calculation

When you eventually sell the shares, your taxable capital gain is calculated by subtracting your statutory "cost base" from your total sale proceeds. Your cost base is determined by your original acquisition route:

For standard unapproved options, your cost base is the physical price you paid for the shares plus the exact amount already hit with Income Tax under PAYE during the exercise phase.
For tax-advantaged EMI and CSOP options, your base cost is simply the pre-agreed exercise price you paid to purchase the shares.

The Business Asset Disposal Relief (BADR) Advantage for EMI

Shares acquired through an unapproved scheme, SAYE, or CSOP face standard residential/asset CGT rates (18% for basic-rate tax bands and 24% for higher-rate bands) upon sale.

However, shares acquired via a qualifying EMI option receive a highly lucrative structural tax break:

Provided at least two years have passed between the original date the EMI option was granted and the date the resulting shares are sold, the disposal automatically qualifies for Business Asset Disposal Relief (BADR).
This relief drops the applicable Capital Gains Tax rate to a flat 18% on all qualifying gains up to your individual £1,000,000 lifetime limit.
Crucially, the standard BADR rule requiring you to hold at least a 5% voting stake in the company is completely waived for EMI share disposals.

4. Dividend Reinvestment and Script Awards

If you choose to retain your scheme shares rather than executing an immediate sale, any corporate dividends distributed by the company remain subject to the UK's standard dividend tax rules.

Even if your employer operates an automated Dividend Reinvestment Plan (DRIP) where your dividends are instantly converted into additional corporate shares rather than paid out as cash, the gross dividend amount must still be declared on your annual tax filings. The only exception applies to dividends generated by shares held within a valid SIP trust envelope, which can be used to purchase "Dividend Shares" that remain entirely tax-free if kept in the plan for at least three years.

Key Points to Remember

EMI and CSOP schemes protect you from Income Tax and National Insurance when options are exercised.
Unapproved share options trigger immediate PAYE Income Tax and NICs based on market value at the date of exercise.
Capital Gains Tax applies to all share schemes from the moment you take physical ownership of the shares.
EMI shares qualify for a reduced 18% BADR capital gains rate if held for two years from the option grant date.
Shares held within a SIP trust for five years escape all Income Tax, National Insurance, and Capital Gains Tax.
Reinvested dividends from company shares remain fully taxable unless protected inside a formal SIP wrapper.

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