This playbook ties together everything that affects the tax on UK RSUs in 2026/27. Each section links to a focused explainer, and every figure is checked against gov.uk and gov.scot.
How are RSUs taxed when they vest?
At vest, the market value of the shares is employment income, taxed through PAYE at your marginal rate plus employee National Insurance. Holding the shares does not defer this; it only affects future capital gains.
Why does sell-to-cover leave me owing tax?
Employers usually sell a flat slice, often 47%, to cover the tax. If your real marginal rate is higher, for example in the 60% personal-allowance-taper zone, that slice is not enough and you owe the difference at self-assessment. This gap is the true-up.
What happens when I sell the shares later?
Selling is a separate Capital Gains Tax event. Only the growth above the vest-date value is taxed, after the £3,000 annual exempt amount, at 18% or 24%. HMRC matches your shares using same-day, 30-day and Section 104 pooling rules.
Does living in Scotland change it?
Yes for income tax: Scottish bands apply to vests, up to 48%. No for National Insurance and Capital Gains Tax, which stay UK-wide.