The Schengen 90/180 rule, explained
A plain-English guide to the EU 90/180 day rule — what a day is, how the rolling 180-day window works, and how to stay on the right side of it without a spreadsheet.
If you hold a non-EU passport — British, American, Canadian, Australian, and most others — you can spend 90 days in any rolling 180-day period inside the Schengen Area without a visa. Go over, even by a day, and you are an overstayer, with consequences that range from a fine to an entry ban.
The rule sounds simple. It is not. The 180-day window moves with you: every day you spent in Schengen in the last 180 days still counts against your 90. There is no annual reset, no fresh start when you fly home for Christmas. Most people who get it wrong were not reckless — they just lost track.
This pillar answers the questions travellers actually ask, in plain English:
- What counts as a "day" in Schengen — arrival and departure days, transit, day trips.
- How the rolling 180-day window really works, and when your days "come back".
- Who needs ETIAS in 2026, and how it differs from the 90/180 limit.
- What happens if you overstay, and how to find the earliest date you can return.
- How to track all of this privately, from the photos already on your phone — no GPS, no account, nothing uploaded.
Where Flags fits
Flags: Schengen Calculator is the tool we built for exactly this. It reads the date and coarse location your camera already wrote into each photo — entirely on your iPhone, using offline maps — and turns that into a running count of days used out of 90. Open it, see your number, carry on. No location permission, no cloud, no login.
It is a tool, not legal advice. Border officers have the final say. But knowing your number — and the earliest date a trip would fit — is most of the battle.
Start with what counts as a day, then read how Flags counts your days without tracking you.
In this guide
- What counts as a "day" in the Schengen 90/180 rule?Arrival days, departure days, transit and day trips — exactly what counts toward your 90 days in Schengen, and how the rolling 180-day window decides when your days come back.
- Is there a Schengen calculator app that tracks your days automatically?Most Schengen day-counters make you type every trip or track your location. Flags reads the dates already in your photos — on-device, no GPS, nothing uploaded — and shows days used out of 90.
- ETIAS 2026 — what it is and how it differs from the 90/180 ruleETIAS is the EU's new travel authorisation for visa-exempt visitors, expected in 2026. What it is, who needs it, what it costs — and why it does NOT change your 90/180 day limit.
- How to work out how many Schengen days you have leftYour remaining Schengen days aren't 90 minus your trips — the rolling 180-day window means days expire too. Here's how to calculate days left, and the fastest way to just see the number.