Our terrier, Biscuit, has crossed the Channel under sail seven times. The first crossing, in 2019, needed an EU pet passport and a five-minute chat with the vet. The crossings since have needed a new certificate every single trip, a fresh vet appointment within ten days of leaving, and a worming tablet on a stopwatch before we are allowed home. Brexit was harder on the dog's admin than on mine.
If you are cruising to France with an animal on board, the rules are not impossible, but they are unforgiving on timing, and a boat makes the timing harder than a ferry foot passenger faces. Here is exactly what we do.
The old pet passport is dead for new GB pets
If you hold a pet passport issued in Great Britain, it is no longer valid for travel to the EU. That ended with the transition period. Passports issued in an EU member state (including, oddly, ones issued in Northern Ireland or the Republic of Ireland) still work, but for the average British boat owner the relevant document is now the Animal Health Certificate, the AHC.
So the honest framing is not "passport vs AHC". For a GB-based pet it is "AHC, every trip", unless you go to the trouble of getting an EU-issued passport from a vet in the EU.
The three things that must already be true
Before any certificate is worth anything, your pet needs the basics in the right order.
- A microchip, fitted before or at the same time as the rabies vaccination. If the chip goes in after the jab, the clock on the vaccine does not count.
- A rabies vaccination. The animal must be at least 12 weeks old for its first dose. Crucially, you must then wait a minimum of 21 days after that first vaccination before you are allowed to travel. A booster done in time keeps the protection continuous with no new wait.
- The vaccination details (vaccine name, batch, date given, valid-from date and expiry) recorded by the vet.
That 21-day wait is the one that wrecks plans. If you decide in June that you fancy a Brittany cruise and the dog has never had a rabies jab, you cannot leave until July at the earliest. Sort the rabies vaccination weeks ahead of the season, not the week before.
The AHC: 10 days, 4 months, one signature
The Animal Health Certificate must be issued by an official veterinarian within 10 days before you enter the EU. Once issued, it is valid for onward travel within the EU for 4 months, and for re-entry to Great Britain within that window, so a single AHC covers a normal summer cruise as long as you head home inside four months.
Up to 5 pets can go on one certificate. Cost in the UK in 2025 ran from around 100 pounds to over 200 pounds for one animal, with budget providers nearer 70 to 100 pounds, and additional pets often added for about 30 pounds each. Book early: many vets want a few weeks' notice and charge a premium for last-minute appointments.
Here is the boat-specific catch. The 10-day window starts before you enter the EU, not before you leave your home marina. If your weather window slips and you sit in Falmouth for four days waiting for the wind to back, your AHC is burning daylight. We now book the vet appointment only once we have a credible forecast, and we choose a vet who can fit us in at short notice. Plan the certificate around the crossing, not the calendar.
For UK skippers the AHC sits alongside a whole stack of new arrival admin. It is worth reading bringing a uk flagged boat to France after Brexit so the pet paperwork lines up with the boat paperwork, because both have to be sorted before you slip lines.
Going out is easy. Coming home is the tapeworm trap.
To enter France, your dog needs the microchip, valid rabies vaccination and AHC. France does not require a tapeworm treatment on the way in, and cats never need the tapeworm treatment in either direction.
The trap is the return leg. To bring a dog back into Great Britain, it must be treated for tapeworm by a vet, and the timing is precise: the treatment must be given not less than 24 hours and not more than 120 hours (that is 1 to 5 days) before you arrive back in the UK. The vet records it, with date and time, in the AHC or passport.
On a boat this is genuinely awkward. Picture the scene: you want to cross from Cherbourg to the Solent on Thursday, so the dog needs worming by a French vet somewhere in the Tuesday-to-Wednesday window. Then the wind goes foul and you sit for three days. Cross the 120-hour line and the treatment is invalid; you cannot legally land the dog in the UK and you are back to a French vet. We have been caught by exactly this. Now we treat it as a soft commitment and only ask the vet to worm Biscuit once we are confident the crossing is happening, sometimes meaning a vet visit in the departure port the same morning we leave.
Find an English-speaking vet near your likely departure harbour before you need one. The capitaineries usually have a list, and it saves a frantic search with a dog who needs a tablet inside five hours.
Practical boat life with an animal aboard
A few things that are not in the regulations but matter at sea.
- Carry the original documents, dry-bagged. France wants originals, not photocopies, and a soggy AHC is useless. The same rule covers your boat documents the Gendarmerie checks.
- Fit a pet lifejacket with a strong grab handle. Recovering a dog over a high topside is no joke in a seaway.
- Photograph every page of the AHC and the rabies record on your phone as a backup, even though the originals are what count legally.
- Keep the vaccine expiry date in your head. If the rabies jab lapses mid-cruise, the AHC dies with it and you have a problem getting home.
Cats, ferrets and the things people forget
Most of what I have written assumes a dog, because dogs are the common case on cruising boats, but the rules differ in useful ways for other animals.
Cats need the microchip, the rabies vaccination with the same 21-day wait, and the AHC, exactly as dogs do. The difference is the tapeworm treatment: cats never need it, in either direction. So a ship's cat is marginally simpler to bring home than a ship's dog, because you skip the tight 24-to-120-hour vet visit before the return crossing.
Ferrets are treated like dogs for tapeworm purposes in some respects, so check the current rule with your vet if you cruise with one. They are rare aboard, but they do turn up.
A point that catches people: the AHC covers up to five pets, but every animal needs its own microchip and its own valid rabies record. You cannot piggyback an unvaccinated puppy onto a certificate because there is space on the form.
Getting an EU passport instead, if you cruise France a lot
If you spend serious time in France or keep the boat there, repeating the AHC for every trip becomes both expensive and a logistical headache. There is an alternative worth knowing about: an EU pet passport, issued by a vet within the EU. Once your pet has one (with the rabies record entered by an EU vet), you can travel on it repeatedly without a fresh AHC each time, which suits the cruiser who is in and out of French ports all season.
The catch is you have to be in the EU to get it, so it is something you arrange once you are over there, typically through a French vet, rather than before you leave the UK. For a one-off summer cruise the AHC is simpler. For a boat based in France or an owner who crosses several times a year, the EU passport pays for itself quickly and removes the recurring 10-day scramble. If you are weighing up basing the boat across the Channel, the broader admin picture is in bringing a uk flagged boat to France after Brexit.
The short version
For a GB pet: microchip first, rabies vaccination with a 21-day wait, then an AHC issued within 10 days of entering the EU and valid for four months. Going to France, no worming needed. Coming home, a vet-administered tapeworm treatment for dogs in a tight 24-to-120-hour window before arrival.
Get the rabies done early, book the vet around your actual weather window rather than a fixed date, and find a French vet near your return port before you need them. Do that, and the dog has a far better summer than the paperwork suggests.
