Kitten Vaccinations: The UK Schedule Explained

Getting your kitten vaccinated protects them from some serious, common cat diseases and is one of the first jobs on the new-kitten list. Whether your kitten will go outdoors or stay in, the early jabs matter. Here's how the UK course works.

This is general guidance, not a substitute for veterinary advice — your vet will set the exact schedule that's right for your kitten.

What kitten vaccinations are

Vaccinations prepare your kitten's immune system to fight off specific diseases before they meet them. Kittens get some early protection from their mother, but it fades quickly, leaving a vulnerable window — which is why the course starts young and builds protection in two stages.

What they protect against

The core UK cat vaccinations typically protect against cat flu (a nasty respiratory illness that can leave lasting effects), feline infectious enteritis (panleukopenia, which is often fatal), and feline leukaemia virus (FeLV), which is spread between cats and damages the immune system. Your vet will advise which your kitten needs based on whether they'll go outside and mix with other cats. Even indoor cats are usually vaccinated against the core diseases, as some can be brought in on clothing or during boarding.

The schedule

The primary course is usually two injections given a few weeks apart, generally starting from around eight to nine weeks of age, with the second a few weeks later. The exact ages and intervals depend on the vaccine your vet uses, so follow your practice's plan. After the primary course, your cat moves onto regular lifelong boosters to keep their protection topped up — your vet will tell you when each is due.

When can my kitten go outside?

If your kitten will be an outdoor cat, don't let them out until the primary course is complete and your vet confirms they're fully protected — usually a week or two after the second injection. It's also strongly recommended to neuter before letting them roam, both to prevent unwanted litters and to reduce fighting and straying. Our when to neuter a cat guide covers the timing. Until they're protected and neutered, keep your kitten safely indoors.

Indoor cats and lifestyle

Whether your kitten will go outdoors makes a real difference to which vaccines they need. The feline leukaemia (FeLV) vaccine, for instance, is especially important for cats that will mix with others outside, since FeLV spreads between cats. Indoor-only cats may not need every component an outdoor cat does, but they're still usually vaccinated against the core diseases — partly because infections like cat flu and panleukopenia are hardy and can be carried indoors, and partly because plans can change and a cattery stay will require up-to-date jabs. Tell your vet honestly how your cat will live, including whether other cats come and go in the household, and they'll tailor the plan accordingly.

Rehomed and rescue kittens

If you've taken on a kitten or cat whose vaccination history is unknown or incomplete, don't assume they're protected. Bring any paperwork from the breeder or rescue to your first vet appointment. Your vet may recommend starting or restarting the course to be safe — it's far better to repeat a vaccination than to leave a cat exposed to something serious. Many rescues will have started the course before rehoming, so check what's been done and when the next dose is due.

What to expect and aftercare

The appointment is quick — a health check and a small injection. Most kittens take it in their stride. It's normal for a kitten to be a little quiet or sleepy for a day, sometimes with a small tender lump where the jab went in, which settles by itself. Contact your vet if your kitten seems genuinely unwell, has facial swelling, repeated vomiting, or any breathing difficulty after a vaccination, as reactions, while rare, need prompt attention. It also helps to keep your kitten calm and warm for the rest of the day, with easy access to food, water and a quiet place to nap.

It's worth keeping a simple record of which vaccinations your kitten has had and when, along with the vaccination card your vet gives you — you'll need it for boosters, and catteries and some insurers ask to see proof. If you ever move vet practices, that record travels with you and saves any guesswork about what's due.

Keep on top of the dates with our vaccine reminder, and the pet medicine calendar is handy for the flea and worm treatments that start around the same age.

Costs

The primary kitten course is a first-year cost, with annual boosters afterwards. Prices vary by vet and region, so we don't quote exact figures — ask your practice, and ask whether they offer a health plan that spreads vaccination and routine care into monthly payments. To plan the unexpected too, see our pet emergency cost calculator and pet insurance guide. Need a vet? Our vets directory can help.

New to kittens? Our kitten hub walks you through the rest. For the canine equivalent, see puppy vaccinations, and don't forget cats now legally need microchipping too.

Sources

• PDSA — Vaccinating Your Cat
• Cats Protection — Vaccinations
• Blue Cross — Pet Advice
• RSPCA — Cats