Kitten Vaccination Schedule: Core Vaccines, Timing and Indoor Cats
The core vaccines kittens need, roughly when they are given, how rabies rules work, and why indoor kittens still need protection.
Most kittens receive a series of core FVRCP vaccines (feline herpesvirus, calicivirus and panleukopenia) every 3 to 4 weeks, starting at about 6 to 8 weeks and continuing until around 16 to 20 weeks. They also get rabies as required by local law and, in the US, the feline leukemia virus (FeLV) vaccine, which experts consider core for kittens and young cats. Boosters follow about a year later.
Your veterinarian sets your kitten’s exact schedule. Use this guide to understand what is being given and why.
Why kittens need several shots
Kittens get temporary protection from their mother’s antibodies, but those antibodies fade at different ages and can stop a vaccine from working while they are present. A series of doses spaced a few weeks apart, ending after maternal antibodies are likely gone, gives the best chance of lasting protection. Ending the series too early is one of the most common gaps.
Core vaccines for kittens
The 2020 AAHA/AAFP Feline Vaccination Guidelines describe these as core for pet cats in the US:
- Feline panleukopenia (FPV): a severe, highly contagious virus that is especially dangerous for kittens.
- Feline herpesvirus-1 (FHV-1) and feline calicivirus (FCV): the main causes of “cat flu” upper respiratory infections. These three are usually given together as FVRCP.
- Rabies: fatal and transmissible to people.
- Feline leukemia virus (FeLV): core for kittens and cats under 1 year, because young cats are more susceptible. After the first year, it becomes a lifestyle vaccine based on risk.
Typical kitten vaccine timeline
This table shows the general pattern. Your clinic may use slightly different weeks.
| Age | What is commonly given |
|---|---|
| 6 to 8 weeks | First FVRCP dose |
| Every 3 to 4 weeks after | Further FVRCP doses until about 16 to 20 weeks |
| From about 8 weeks | FeLV: two doses a few weeks apart (often after a FeLV test) |
| Around 12 to 16 weeks | Rabies, timed by local law and the vaccine label |
| About 6 months | Some vets give an extra FVRCP dose, which the guidelines suggest to cover late-fading maternal antibodies |
| About 1 year after the kitten series | Boosters for core vaccines, including FeLV |
| Adulthood | Boosters on the interval your vet recommends based on the product and your cat’s risk |
Testing for FeLV and FIV
Many vets recommend testing new kittens for feline leukemia virus and feline immunodeficiency virus (FIV), especially if they came from a shelter, the street or a multi-cat home. Testing helps your vet decide on vaccination and care, and it matters if you have other cats. Ask your vet whether and when your kitten should be tested.
Do indoor cats need vaccines?
Yes. Indoor kittens still need core vaccines because:
- Panleukopenia virus is very hardy and can be carried indoors on shoes, clothes and hands.
- Cats slip outside, and bats occasionally get into homes, which is a rabies risk.
- Indoor cats may need boarding, a vet stay or a move, where exposure is more likely.
- Rabies vaccination is required by law for cats in many US states and localities, often regardless of whether the cat goes outside. For example, the Cornell Feline Health Center notes that New York requires rabies vaccination for cats over a certain age. Check your state or county rules.
An indoor-only adult cat may not need FeLV boosters after the first year. Your vet will weigh that with you. For more on lifestyle trade-offs, see indoor vs. outdoor cats.
If you live in the UK
UK kittens are usually vaccinated against cat flu (herpesvirus and calicivirus) and feline infectious enteritis (panleukopenia), with feline leukaemia often recommended too. A common pattern is a first injection at around 8 to 9 weeks and a second 3 to 4 weeks later, with a booster a year later. Rabies vaccination is not routine in the UK and is mainly needed for travel. Your vet will advise when your kitten can go outside after the course.
After the shots: what is normal
Mild sleepiness, a slightly reduced appetite or a tender injection spot for a day or so are common. Call your vet promptly or go to an emergency clinic if your kitten has:
- Facial swelling, hives or intense itching
- Vomiting or diarrhea
- Difficulty breathing
- Collapse or extreme weakness
- A lump at the injection site that grows or lasts more than a few weeks
Keep a note of where each vaccine was given and mention any lump at your next visit.
Planning the first vet visits
- Book a visit within the first week or so after your kitten comes home, and bring any records from the shelter or breeder.
- Ask which vaccines are given today and when the next is due.
- Ask about FeLV/FIV testing, parasite control and the right age for spaying or neutering.
- Get a written vaccination record for boarding, travel and future vets.
Our guide on how to care for a kitten covers feeding, litter and play in the same early weeks.
Bottom line
Kittens need a series of FVRCP shots every 3 to 4 weeks until about 16 to 20 weeks, plus rabies and FeLV, with boosters around a year later. Indoor kittens need core protection too. Follow your vet’s schedule and keep the records safe.
FAQ
What does FVRCP stand for?
Feline viral rhinotracheitis (caused by herpesvirus), calicivirus and panleukopenia. It is the core combination vaccine for cats.
How many shots does a kitten need?
Usually several FVRCP doses depending on the starting age, two FeLV doses, and rabies. Your vet will tell you the exact number for your kitten.
Is it too late to vaccinate an older kitten or adult cat?
No. Cats with no known history usually get a shorter starting series, often two doses a few weeks apart. Ask your vet.
Can I vaccinate my kitten myself?
It is best not to. A vet visit includes an exam, correct storage and handling of the vaccine, an official rabies certificate where required, and a record that boarding facilities and many jurisdictions accept.