Schengen 90/180 FAQ

Common questions, answered

Stay180's Schengen calculator applies the rolling 90/180 rule, so here are the traps that catch people out most often — does the window reset, do border days count, does crossing a border restart the clock.

Does the 90-day Schengen limit reset on 1 January?
No. The 90/180 rule is not counted per calendar year. It is a rolling window: on every day of your stay you look back 180 days, and your total time inside Schengen must not exceed 90 days. There is no January reset — days only return as older days roll out of the window.
Do weekends count? Is a Friday-to-Sunday trip two days or three?
Three. The day you enter and the day you leave each count as a full day inside Schengen, so a Friday-to-Sunday trip uses three of your 90 days, not two. Counting nights instead of border days understates every trip.
Does moving between Schengen countries reset the count — for example entering Italy?
No. The 90 days are one area-wide pool shared by all 29 Schengen countries. Crossing from France into Italy, or from Spain into Portugal, does not reset or restart anything, and there is no separate per-country allowance to use up.
I have 40 days left today. Can I book a 40-day trip?
Not necessarily. “Days left today” describes only today’s look-back. Every day of the trip is checked against its own 180-day window, and the trip adds a day each morning, so a stay can reach 90 part-way through. Plan against the leave-by date for your entry date instead.
Can I leave for a day and come back for another 90 days?
No. Leaving Schengen only stops new days being added; the days you already spent stay in the window for 180 days from each day you were present. A short “visa run” does not reset your allowance — you have to wait for old days to age out.
Which countries count toward the 90 days?
All 29 Schengen countries count, including Iceland, Norway, Switzerland and Liechtenstein. The United Kingdom and Ireland do not. Time in a non-Schengen country does not use your allowance, but it does not reset it either.
What is a leave-by date?
A leave-by date is the last day you can still be inside Schengen for a given entry date without exceeding 90 days in any 180-day period. Stay180 checks every day of the planned trip and returns that date, so you can book against it.
Is Stay180 an official calculator?
No. Stay180 is a free planning tool, not immigration advice or a government service. Confirm the same dates on the European Commission’s official short-stay calculator before you travel.