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Share Incentive Plan Calculator

Estimate employee contributions, employer matching and total share value before investment changes.

Inputs

Estimate the value of salary used for a Share Incentive Plan.

How a Share Incentive Plan works

A registered Share Incentive Plan can provide partnership shares bought from salary, employer matching shares, free shares and dividend shares. Scheme limits and employer rules determine which options are available.

The holding period

Tax treatment can depend on how long shares remain in the plan. Removing shares early or leaving employment can change the Income Tax, National Insurance or Capital Gains Tax position.

Investment risk still applies

Tax advantages do not remove investment risk. Holding both employment income and investments in one company can increase concentration risk if the employer performs poorly.

Worked examples

£150 monthly contribution with employer matching

Over five years, the calculator totals employee contributions and the entered employer match before allowing for share price changes, dividends or tax on early withdrawal.

How we calculate this

Monthly contributions are multiplied across the holding period.

Employer matching is estimated from the matching percentage entered.

Share price movement, withdrawal rules and scheme limits are not fully modelled.

FAQs

Are these calculations financial advice?

No. These calculators provide estimates based on the figures entered and published UK tax assumptions. They are not personal financial advice.

Which tax year does this use?

The calculator uses 2026/27 UK tax assumptions, including Income Tax and National Insurance thresholds.

Will my payslip or tax return match exactly?

Not always. Tax codes, payroll timing, pension scheme type, benefits, expenses and HMRC records can change the final result.

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