UK Tax and Payroll Compliance for Share Options and RSUs

If your global group offers share-based rewards to employees — such as Restricted Stock Units (RSUs), Share Options, or Phantom Share Plans — it’s essential to understand the UK tax and payroll implications for your UK-based workforce. Schemes designed overseas, particularly in North America, often benefit from generous tax treatment in their home jurisdiction. Unfortunately, these advantages rarely apply in the UK.

We work exclusively with multinational groups headquartered outside the UK, helping them manage the UK tax and payroll reporting for their global share plans. This is not a one-off issue for us — it’s a routine part of our services.

Key Tax Rules for RSUs and Share Options in the UK

Restricted Stock Units (RSUs)

  • No tax when granted
  • Taxed when they vest
  • Income tax and National Insurance Contributions (NICs) are due when the RSUs vest (i.e. when they become available to the employee).
  • This tax is typically processed through the UK payroll.

 
Some schemes require the employee to cover the employer’s NICs. If so:

  • Deduct the employer’s NICs from the value of the vested RSUs before calculating income tax.
  • Do not deduct the employer’s NICs when calculating the employee’s own NICs.

 
The taxable value is the market value of the shares on vesting, less any amount the employee paid for the shares.

Once the shares vest:

  • Any future growth in value is subject to Capital Gains Tax (CGT).
  • If shares are sold immediately at vesting, there is usually no CGT.

Non-Tax Advantaged or Unapproved Share Options

  • No tax at grant
  • Income tax and NICs at exercise (i.e. when the employee actually acquires the shares)

 
For US-style incentive stock options (ISOs), the UK deems these non-qualifying for tax advantages. Any gain from grant to exercise is taxed as income, not capital.

Phantom Share Plans

  • Phantom shares mirror real shares but are cash-based.
  • The employee receives a cash sum equal to the growth in share value.
  • The cash payment is treated as employment income, subject to income tax and NICs.

 
If the scheme includes a right to receive shares, it may be taxed under share plan rules — even if the employer reserves the right to pay in cash. HMRC will look at:

  • The scheme rules
  • Past practice
  • Employee expectations

 
If it’s likely that the employee expects shares, it may be taxed as a right to acquire securities.

When to Include in the UK Payroll

If the shares are:

  • Listed on a stock exchange and
  • Freely tradable

 
…then you must operate UK PAYE (Pay As You Earn) via the payroll. PAYE is the UK system for collecting income tax and NICs directly from employee wages. You must report the market value of the shares at vest or exercise, less any amount the employee paid for the shares.

Where shares are stock-listed, companies often sell a portion of the vested shares on behalf of the employee to cover the tax and NICs. This must be carefully managed and reported via the payroll.

If the shares are not listed on a stock exchange:

  • The employee is responsible for reporting and paying income tax.
  • However, the employer must inform the employee of the market value of the shares.

 
Determining the market value of non-listed shares can be complex. You’ll need a qualified share valuation expert to assess the value at vesting or exercise.

Ways for staff to Reduce Tax Exposure

  • Pension contributions can reduce income and lower tax exposure.
    • For example, RSUs that push income above £100,000 can lead to a marginal tax rate of 60% due to the loss of personal allowance.
  • Transfer shares to a spouse to double CGT exemptions.
  • Hold shares in an ISA or SIPP (where available) to shelter future gains from tax. Be aware of potential withholding tax on foreign dividends.

Registration and Annual Reporting Obligations

  • Non-tax advantaged schemes must be registered with HMRC when there is a reportable event (e.g. vesting or exercise).
  • An Employment Related Securities (ERS) return must be filed annually, even if no reportable events occur.

 

We will:

  • Ensure schemes are registered with HMRC
  • Help manage ongoing compliance and reporting
  • Prepare and submit ERS returns

Our Services

  • Evaluate the tax and NICs position for each type of share plan
  • Confirm when payroll reporting is required
  • Manage PAYE obligations for stock-listed share schemes
  • Support with share valuations for non-listed shares
  • Advise on reducing the tax impact on UK employees
  • Register schemes with HMRC
  • Prepare and file ERS annual returns

FAQs

Yes, pension contributions can be an effective way to lower your tax bill, especially if RSUs push you into the 60% tax bracket.

Contact Our Experts

Contact us to ensure your UK compliance is watertight when it comes to global share-based rewards. We’ll help you keep your UK employees and HMRC happy — without unnecessary surprises.

Sarah English

Senior Manager

Liam Perry

Senior Associate

Global Mobility, Personal Tax & VAT