The Schengen 90/180 rule explained, with worked examples

The 90/180 rule sounds simple and is arithmetically slippery, which is why so many otherwise careful travellers get it wrong. This guide explains exactly what the rule measures, why nothing ever resets, works through the counting day by day on two realistic trip patterns, sets out the four miscalculations that produce almost every accidental overstay, and explains which countries the rule actually covers.

What the rule says

A visa-exempt visitor may stay in the Schengen area for no more than 90 days in any 180-day period. The phrase that matters is any 180-day period. There is no fixed start date and no annual allowance. The test is applied to whichever day you are being asked about: count that day and the 179 days before it, add up every day you were physically present in the area during that stretch, and the total must not exceed 90.

Because the window moves with you, it is easiest to picture as a 180-day ruler with its right-hand end pinned to today. Every day the ruler slides one day forward, so a day of presence enters the count when you use it and leaves the count exactly 180 days later. Nothing is forgiven early and nothing is wiped clean.

Both the entry day and the exit day count

The day you arrive counts as a full day of presence, and so does the day you leave, no matter what time your flights are. Land at 23:30 on a Friday and fly home at 06:00 on the Sunday, and you have used three days out of your 90. This single rule accounts for a large share of the discrepancy between people's mental arithmetic and the official count, because it makes every short trip cost two more days than the number of nights suggests.

Worked example one: a straightforward long stay

You enter on 1 March and leave on 29 May. That is 90 days of presence counting both end days, so on 29 May the window covering that day and the previous 179 days contains exactly 90 days and you are at your limit but not over it.

The important question is when you could next enter. Your first day of presence, 1 March, drops out of the window 180 days later, which frees one day. The second frees another the next day, and so on. So the allowance returns at a trickle of one day per day, not in a block, and a full 90-day allowance is only available again once every one of those days has aged out. Anyone planning back-to-back long stays needs to model this rather than assume a clean six-month cycle.

Worked example two: frequent short trips

A more typical pattern for someone with family or work in Europe. Suppose in the six months before a planned trip you made these visits.

On 4 August the 180-day window reaches back to 6 February, so every one of those trips falls inside it. The total is 66 days used and 24 remaining on that date. Note what the table makes obvious: the two short trips, which felt like almost nothing, consumed nine days between them. Note also that the remaining balance is not fixed. It rises as March days age out and falls again with every day of a new stay, so the answer to how many days you have left is always attached to a specific date.

The four miscalculations that cause overstays

1. Treating the limit as 90 days per calendar half-year. It is not. Two 90-day stays either side of 1 January would be a serious overstay in the middle.
2. Assuming leaving the area resets the clock. Going home for a fortnight removes nothing from the count. Only the passage of 180 days from each individual day of presence does that.
3. Counting nights instead of days. Three nights is four days. Over a year of monthly weekends, that error alone can hide two weeks of usage.
4. Counting the wrong countries. Days in Ireland do not count towards the Schengen 90. Days in Switzerland and Norway do, even though neither is in the EU.

Which countries the rule covers

The Schengen area covers 29 countries: 25 of the 27 EU member states, plus Iceland, Liechtenstein, Norway and Switzerland. Bulgaria and Romania became full members on 1 January 2025 when checks at their internal land borders were lifted, so days spent there now count. Ireland is not in the Schengen area at all and operates its own arrangements, and controls at Cyprus's internal borders have not yet been lifted. The current composition is set out by the European Commission, and gov.uk maintains country-by-country entry guidance in its foreign travel advice.

The area counts as a single territory for this purpose. Moving from France to Germany to Poland does not restart anything, because you never left. That is also why there is no useful trick involving internal borders.

What the rule does not govern

The 90/180 limit applies to short stays by visa-exempt visitors. It is not the ceiling on how long you can be in Europe in principle. National long-stay visas and residence permits sit outside the rule, and time spent in a country under such a permit is generally not counted against the 90 days for the rest of the area, though the detail varies by state. If you are planning anything longer than a visit, the relevant question is a national immigration one and should be checked with the country concerned.

Nor does the 90-day allowance guarantee entry. Border officers can still ask for proof of accommodation, onward travel and means of support, and can refuse entry even where days remain.

One more thing the rule does not do is make allowances for disruption. A cancelled flight that reroutes you a day later costs a day of the 90 like any other, so keep the airline's written notices: they explain the extra days and support a claim under cancelled flight rights, while the overnight hotel and meals fall under the airline's duty of care. If you are travelling close to the limit, build in a buffer of several days for exactly this.

Why precision matters more than it used to

Until recently the count depended on a border officer interpreting a page of ink stamps, which was error-prone in both directions. That is no longer the position. The EU Entry/Exit System now records every crossing electronically and calculates overstays automatically, which is covered in EES and ETIAS. In practice the machine now knows your balance more precisely than you do, so the safe approach is to count carefully, keep your own record of entry and exit dates, and leave a margin of a few days rather than planning to the exact limit. The Schengen calculator does the arithmetic for any date you ask it about.