The six-month passport rule: how long your passport must be valid to travel

Every year people get turned away at the check-in desk holding a passport that hasn't expired. It still had four months left, which felt like plenty for a ten-day holiday. The problem was the destination: it wanted at least six months.

The rule isn't about your trip at all. It's about the date your passport expires compared with the date you arrive or leave, and different countries count it differently.

Three kinds of rule

Almost every country uses one of these:

• Valid for six months from arrival. On the day you land, the passport must have at least six months left. This is common in Asia and the Middle East. If your passport expires on 10 June, the last day you can arrive is 10 December of the year before.
• Valid for a period after you leave. The Schengen area counts three months from the day you plan to leave, not the day you arrive. Stay for a month and you need roughly four months left when you fly in.
• Valid for the whole stay. Some countries only ask that the passport doesn't expire while you're there. Even then, airlines and transit airports may want more, so a little extra margin is wise.

Popular destinations

Rules depend on your nationality and the type of visa, and they change. Treat this as a starting point and confirm on the embassy's site or with your airline before you book.

The ten-year catch in Europe

The Schengen rule has a second part people miss: the passport must have been issued within the last ten years. Some countries used to add extra months to a passport when you renewed early, so a few passports are valid for more than ten years in total. For Schengen, the issue date counts, not just the expiry date.

Why the airline cares more than the border

Airlines check passports against an industry database of entry rules before you board, because if a country refuses you entry, the airline has to fly you back at its own cost. That makes check-in staff strict. Arguing that the rule "doesn't really apply" rarely works at the desk, even when you're right.

Connecting flights add their own rules. If your route goes through another country, especially one where you'd have to pass immigration to change terminals, check that country too.

Other things that stop people boarding

• Blank pages. Some countries want one or two completely empty pages for stamps. South Africa, for example, asks for two.
• Damage. A torn photo page, water damage or a detached cover can make a passport invalid even if the date is fine.
• A passport reported lost. If you reported it lost and then found it, it's usually cancelled and can't be used.
• Name changes. Your ticket must match the passport you travel on. A marriage certificate doesn't fix a mismatch at check-in.

When to renew

A simple habit avoids almost all of this: renew when your passport has about a year left. That keeps you clear of every six-month rule, and it gives you time if the passport office is slow. Processing times swing a lot by season, and summer is usually the busiest.

If you renew, you'll need new photos. Each country has its own size and head-size rules, and a rejected photo is the most common reason a renewal gets delayed.