How are the months left on a passport calculated?

[Wessexheavytreader]

I can’t seem to find the answer!

Is it calendar months? So say passport expires on 15th September you have to return from EU holiday by 15th June?

That's how I would interpret it

Depends where you’re going. The rules vary

This is pretty clear https://europa.eu/youreurope/citizens/travel/entry-exit/non-eu-nationals/index_en.htm

If you are a national from a country outside the EU wishing to visit or travel within the EU, you will need a valid passport and possibly a visa. Your passport should be valid for at least 3 months after the date you intend to leave the EU and it must have been issued within the last 10 years. This means your travel document must have been issued within the previous 10 years the day you enter the EU on condition that it is valid until the end of your stay plus an additional 3 months.

Yes to calendar months. If I was at the point where days mattered I’d be feeling a bit nervous though. Have you time to renew yours?
But also yes to sometimes the expiry is counted as ten years from issue.

Thank you for the replies, and the link. Calendar months makes sense to me.

@FabuIous Luckily I haven’t booked the trip yet, and will make sure I have a wide margin for any problems/delays. I would be very nervous if I didn’t!

I’ve recently renewed my passport; it didn’t expire until March 2026 but was valid for more than 10 years. Once I’d worked out when 10 years were up, and took into consideration the 3 month rule, it meant my EU trip had to finish prior to 22nd July but I don’t arrived home until 23rd so I renewed to ensure I received my passport back in time to go!

@Karatema you dont deduct the 3 months from the 10 years you calculate.

You look at issue date for entry into the EU and then look at the expiry date to work out the 3 months remaining.

You'd have needed to leave the EU in December 2025 to be within 3 months of March 2026. I dont know your issue date to work out the latest you could have entered the EU.

I’m sorry but this is incorrect, I checked with my friend who works for Police aux Frontières. My passport was valid for over 10 years so I was told to take the date it started, add 10 years and then deduct 3 months. This is the date they would work on. She said I’d, probably, be ok because it was only a couple of days but said every organisation have their jobs worth! They ignore any time 10 years after the start date.

They are giving you the wrong info then
I stand by what I said

British passport holders travelling to the Schengen area – which is countries in the EU (except Ireland) as well as Switzerland, Norway, Iceland, Liechtenstein, Andorra, Monaco, San Marino or Vatican City - need to make sure their passport meets two main validity requirements, which are independent of each other

1. The passport must have been issued less than 10 years before the date they enter the country.


2. The passport must be valid for at least three months after the day they plan to leave.

So, when travelling to the majority of countries in Europe, people need to check both the date of issue to check that their passport is no more than 10 years old when they enter the country, and also check the date of expiry to make sure they will have at least three months left when they return to the UK.

www.tui.co.uk/passport-checker

They do ignore any time 10 years after the start date, but you don't have to deduct 3 months from that, that's completely separate <bangs head>

Our passports were issued in January 2016 and expire in September 2026.

However, we cannot use them to enter the EU after January 2026 so will be renewing them in November/December this year as we generally holiday in the EU. We don't have to ensure that we've done this by October because we don't have to have 3 months before the 10 year anniversary.

However these particular rules apply to the EU and other countries have other rules. Say we decided that in 2026 our only holiday would be to Mexico in February, we could use our current passports because Mexico doesn't have any rules about remaining validity or date of issue.

https://www.gov.uk/foreign-travel-advice/mexico/entry-requirements

So in February 2026 (and likely as late as September 2026) we can use our passports to travel to Mexico but not Spain.

Can I piggyback and ask if anyone knows whether they check your return ticket if travelling on Eurostar?

I've recently been to Brussels and onwards and I only remember my passport being checked by French border police - not my return ticket.

We are due to go to France again by Eurostar in the summer. DD is within the 3 months till expiry (it's an exactly 10 years passport - not one with extra time). We will be fine if they check our return tickets but I'm nervous in case they just go "everyone takes a 3 week holiday and you only have 2 1/2 weeks left on this".

Sorry! Pressed send without adding message.

This tells you if your passport is in date for your journey. You add passport dates, country your visiting and dates of travel.