Guides
Short explanations of the rules behind our counters. Official rules and our own explanations are always shown separately, with a link to the official text.
Last updated · Sources checked on
The Schengen 90/180 rule explained
The official rule in plain words, the rolling window, the Commission's worked examples and common mistakes.
EES (Entry/Exit System) explained
What the EES records at the border, who it applies to, and what it changed since 10 April 2026.
ETIAS explained
The future travel authorisation for visa-exempt travellers: official facts and what is still unknown.
The 183-day rule explained
Why "183 days" means different things in national tax rules and in tax treaties.
For information only. StayDayCheck is an independent site, not linked to the EU or any government. Results are estimates based on the dates you enter and on the official texts cited on each page. They are not legal, immigration or tax advice. Border guards and tax authorities make the decisions: when in doubt, ask them or a qualified professional.
Official sources
- Schengen Borders Code, Regulation (EU) 2016/399 (consolidated text), Article 6
- EU Travel to Europe: What is the EES?
- EU Travel to Europe: official ETIAS website
- OECD Model Tax Convention on Income and on Capital, Condensed Version 2017 (PDF)
Sources checked on 1 November 2026.