How visa-free travel works: the 90/180 rule, passports and overstays

Visa-free does not mean rule-free. The basics that catch travellers out.

The 90 days in 180 rule

The Schengen area allows visa-exempt visitors 90 days in any rolling 180-day period, counted across all 29 EES countries together, not per country. Since April 2026 the Entry/Exit System counts the days automatically, so the old trick of unstamped borders no longer works. The UK allows up to six months per visit; the US allows up to 90 days under ESTA.

Passport validity

Many countries require the passport to be valid for at least six months beyond the date of entry or departure (Thailand, China, most of Asia and the Middle East). The Schengen area requires three months beyond the planned departure date and a passport issued within the last ten years. Airlines check this at boarding.

Purpose of visit

Visa-free entry is normally for tourism, short business meetings and family visits. Paid work, long study and residence need a visa even if your passport is "strong". Thailand's new 30-day exemption, for example, is explicitly for tourism only.

Overstays

Overstaying even by a day can mean a fine, an entry ban or refusal next time. With EES and similar systems the overstay is recorded automatically. If you need longer, extend in-country where allowed (Thailand: one 30-day extension) or apply for the right visa before you go.

Proof the border may ask for

• Return or onward ticket
• Accommodation booking or host address
• Enough money for the stay
• Travel insurance (required for some nationalities, recommended for all)

Last reviewed: 21 October 2026. Rules change; confirm with the official source before you travel.