All glossary terms
Glossary term
Self Assessment
HMRC's system that places responsibility on the taxpayer to file the information needed to calculate the tax charge.
Related terms
1
Jurisdictions
uk
Definition
Self Assessment is the UK filing system under which taxpayers provide the information needed to establish the correct tax liability. It is better understood as a process with registration, filing, payment, and penalty rules rather than as one isolated form.
Examples
- A first-time filer may need to notify HMRC by 5 October before the later online filing deadline arrives.
- Penalty analysis depends on where the taxpayer failed inside the Self Assessment process.
Related terms
Translations
ESSelf Assessment
ZH自我申报制度
Citations
HMRC SALF · 202
Related citations
Computed from the cross-reference graph. Links open the related entity on this site.
This entry cites
Primary sources
- HMRC Self Assessment legal frameworkVerified 2026-05-01
Important disclaimer
This library is for general tax education only. Always verify filing obligations, due dates, and tax consequences against the cited primary source or with a qualified tax professional.