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AHC validity. The dates that decide whether you fly.

Three dates on the Animal Health Certificate decide whether your pet boards the plane: when it was signed, when you arrive in the EU, and how long the trip runs for. If any one of them falls outside its window, the certificate stops working, and the border check is where you find out.

READ5 min readREVIEWEDMay 2026SOURCEgov.uk

Ten days to reach the EU

The Official Veterinarian signs the AHC, and from that signing date you have 10 days to arrive at your first EU entry point. The clock isn’t leaving the UK, it’s arriving in the EU. A certificate signed on a Friday has to see EU soil by the following Monday week.

Most vets aim to sign 3 to 7 days before travel. Earlier than that eats into the headroom you might need if a ferry sailing cancels or a flight reschedules. Later than that and you’re booking the appointment under pressure.

Printed in two languages

The AHC is issued bilingually, in English and the official language of the EU country you first arrive in. The border officer there reads the fields in their own language while you keep the English alongside. There’s no separate translation to organise.

Six months once you're stamped in

Once you cross the EU border for the first time on the trip, the border official scans the chip, checks the certificate, and applies an entry stamp. That stamp is the moment the six-month window starts.

Inside the six months, the same certificate covers onward travel between EU countries and the return journey home to the UK. One signed AHC, one entry stamp, both directions covered. There are no additional checks to organise mid-trip as long as you’re inside the window.

Stays over six months change the return route

If the pet stays in the EU longer than six months, the original UK-issued AHC no longer covers the journey home. Before flying back, you need a GB Pet Health Certificate issued by an authorised EU vet in the country you’re staying in. That vet checks the pet, references the original UK paperwork, and issues a fresh document for the return leg.

In practice it means deciding on the way out which side of six months the trip sits on. A three-week summer holiday uses the AHC end-to-end. An eight-month sabbatical in Portugal needs a Portuguese vet appointment before flying home.

One trip, one certificate

The AHC is single-trip. A second trip a fortnight after the first means a second AHC, signed within 10 days of that second EU arrival. The rabies vaccination doesn’t need to be repeated unless it has expired in the meantime. The chip number and the rabies record carry across; the certificate does not.

For owners who travel several times a year, the running cost is the OV appointment each time, not the underlying vaccinations. Worth factoring into the price of the trip if EU travel is a regular thing.

Where this applies

The 10-day signing window and the four-month travel window apply to UK residents travelling with a dog, cat, or ferret to any EU country or Northern Ireland. Listed third countries that built their pet import rules around the EU model use similar windows, though the paperwork is named differently. The search on this site gives you the exact dates for the corridor you’ve selected.

A note for commercial movers

Commercial moves use a different paperwork track (commercial health certification rather than an AHC), with shorter validity windows and pre-notification requirements at the border. The principles around chip, rabies, and signing dates carry over, but the certificate itself is different. Switch the search to commercial mode to see the right document for your corridor.

The short version

  • The AHC has to be signed within 10 days of arrival in the EU. The clock is EU arrival, not UK departure.
  • Once the certificate is stamped at the first EU border, it covers onward EU travel and the return to the UK for six months.
  • Trips longer than six months need a GB Pet Health Certificate from an authorised EU vet before flying home. Decide which side of six months your trip sits on before you leave.
  • The AHC is single-trip. A new one is needed for every separate journey to the EU, signed within 10 days of that arrival. The rabies vaccination doesn’t need to be repeated unless it has expired.

Check the signing date sits within 10 days of EU arrival, and that the trip length stays inside the six-month window. Those two checks cover the AHC.

Sources

If you want to read the official guidance: