Employee Tax Advantaged Share Scheme User Manual (ETTASUM) meaning

In practice, this denotes HMRC’s online manual that explains how the UK’s tax‑advantaged employee share schemes operate and are administered. It provides interpretative guidance for Enterprise Management Incentives (EMI), Company Share Option Plans (CSOP), Share Incentive Plans (SIP) and Save As You Earn (SAYE), including eligibility and independence tests, share valuation, grant and exercise mechanics, leavers and disqualifying events, PAYE/NICs and capital gains interactions, self‑certification, registration, notifications and ERS annual returns. The label is not statutory; it is HMRC guidance supporting regimes set out primarily in the Income Tax (Earnings and Pensions) Act 2003 and related regulations. Practitioners use it to confirm compliance with qualifying conditions, manage filings via HMRC’s ERS online service, remedy errors and respond to HMRC enquiries. Usage and application are consistent across England & Wales, Scotland and Northern Ireland. It does not apply in Ireland, where comparable matters are addressed by Irish Revenue guidance (for example, APSS, SAYE and KEEP). Also commonly referred to by HMRC as the Employment‑Related Securities and Tax‑Advantaged Share Schemes User Manual (ETASSUM).