About Us

This site does one thing: works out what employee shares are worth after tax.

The calculator covers four types of award. UK Share Incentive Plans, including free, partnership, matching and dividend shares, with the HMRC rules that decide tax under three years, between three and five, and after five. RSUs, including the gap between the 22% withheld and what your bracket actually costs. ESPP purchases, comparing a sale at purchase against a qualifying disposition. And stock options, with break-even and the ISO or NSO difference.

You get a year-by-year table, a growth chart, a tax breakdown and a printable summary. Currency switches between pounds, dollars, euros and rupees.

Everything runs in your browser. No account, no email, nothing saved.

Figures come from HMRC guidance and IRS publications, and are checked at the start of each tax year and whenever a rate changes. Where a rule is commonly reported incorrectly, the correct version is stated with its source.

This is an independent site. It has no connection to HMRC, the IRS, any employer, or any share plan administrator.