The 6-month passport rule, explained

The "6-month passport rule" is shorthand for a requirement that dozens of countries apply: your passport must be valid for at least 6 months beyond the day you enter — not beyond your return flight, not beyond today, beyond the day you arrive in the country.

Why countries do this

It's a safety buffer. If something goes wrong — you're hospitalised, you overstay, you need to be deported — the destination country wants to be sure your passport is still valid long enough to handle the paperwork without your home country having to issue an emergency document.

The maths in 30 seconds

Take your travel date, add 6 months, and check your passport's expiry date is after that.

• Flying 1 August → passport must be valid until at least 1 February the following year.
• Flying 14 December → passport must be valid until at least 14 June the following year.

If your expiry falls before that date, you don't meet the rule. Doesn't matter that your trip is only 10 days long.

Who enforces it strictly

Thailand, Indonesia (including Bali), the UAE, Singapore, Brazil and most of South-East Asia and the Middle East apply the 6-month rule with no flexibility. Mexico is technically lenient but US-bound airlines often apply the rule themselves.

Who doesn't

The EU and Schengen Area use a 3-month rule, plus a separate "passport must be under 10 years old" rule. The UK, Ireland, Canada, Australia, Japan and New Zealand only require the passport to cover the duration of your stay.

The catch most people miss

Airlines enforce the rule too — often more strictly than immigration. If your check-in agent thinks you'll be refused entry, they'll deny boarding to avoid the fine the airline pays for returning you. So even in a country that's lenient, your airline might not be.

How to check

Use the free checker on this site — pop in your passport expiry and travel date and we'll tell you instantly whether you meet the rule for your destination.