UK Share Incentive Plan Calculators
A focused set of tools, each answering one specific question — including two general-purpose calculators below that aren’t SIP-specific. Not sure which one you need? Use the decision table below, or start with the full Share Incentive Plan Calculator for the complete picture.
Share Incentive Plan Calculator
Contribution, matching, free shares, tax saved and future value — all in one estimate.
Best for: a first, full overviewOpen calculator →TaxSIP Tax Savings Calculator
Isolates the Income Tax and NIC saved by buying partnership shares from gross salary.
Best for: deciding how much to contributeOpen calculator →ContributionsPartnership Shares Calculator
Shows which cap — £1,800 or 10% of salary — limits your contribution.
Best for: checking your allowanceOpen calculator →Employer matchMatching Shares Calculator
Estimate the value of your employer's matching shares on top of your contribution.
Best for: seeing your employer top-upOpen calculator →Free sharesFree Shares Calculator
Check your free share award against the £3,600 annual limit.
Best for: checking your free share allowanceOpen calculator →WithdrawalHolding Period Calculator
Check the likely tax outcome if you withdrew shares today.
Best for: a specific award dateOpen calculator →General mathPercentage Calculator Hub
8 tools: percentages, increase/decrease, percent change, discount, markup, margin and reverse percentage.
Best for: shopping, business and everyday percentage mathOpen calculator →US / RSU / ESPPUS Equity Compensation Calculator
Estimate the value of your RSUs, ESPP shares or Stock Options after estimated US tax and FICA.
Best for: US-based employees with RSUs, ESPP or stock optionsOpen calculator →Not sure which calculator you need?
| Your question | Use this tool |
|---|---|
| “What’s my SIP worth overall?” | Main SIP Calculator |
| “How much tax will I save?” | SIP Tax Savings Calculator |
| “Am I hitting my contribution limit?” | Partnership Shares Calculator |
| “Is my employer’s match generous?” | Matching Shares Calculator |
| “What are my free shares worth?” | Free Shares Calculator |
| “Should I withdraw my shares now?” | Holding Period Calculator |
Related guides
What Is a Share Incentive Plan?
A complete UK guide to how SIPs work.
GuideSIP Tax Benefits Explained
How the tax savings actually work.
GuideHolding Period Rules
What happens after 3 and 5 years.