Cat Vaccination Schedule by Age: A Simple, Vet-Approved Guide

Kitten Vaccination Schedule (6 to 20 Weeks)

Kittens begin their kitten vaccination schedule around 6 to 8 weeks. Shots are spaced roughly three to four weeks apart because maternal antibodies from the mother gradually wear off, and the vaccine only works once those antibodies fade.

Adult Cat Booster Schedule (1 Year and Beyond)

The first adult booster happens around the first birthday. After that, most core boosters are given every one to three years based on the vaccine type and local rules. Cat booster shots keep immunity strong without over-vaccinating.

Senior Cat Vaccination Guidance

Older cats still need protection, but vets often adjust frequency and may use titer tests to measure existing immunity before giving another shot. Talk to your vet honestly about any chronic illness.

FVRCP and Rabies Explained in Simple Terms

FVRCP is the feline version of the "three-in-one" shot. It protects against feline herpesvirus (painful eye and upper respiratory infections), feline calicivirus (mouth ulcers and respiratory illness), and feline panleukopenia (a deadly parvovirus-like disease).

Rabies is fatal once symptoms appear and, according to the World Health Organization, still causes tens of thousands of human deaths each year, mostly from dog bites but with cats contributing to the chain. A single rabies shot on schedule protects your cat, your family, and everyone your cat meets.

Do Indoor Cats Really Need Vaccines?

Yes. This is one of the biggest myths in cat care. Viruses hitch rides on shoes, clothing, open windows, and visiting pets. An indoor cat can still catch FVRCP diseases, and rabies is legally required in most regions regardless of indoor status.

Indoor cats usually skip some non-core vaccines like FeLV, but core feline vaccines and rabies stay on the list.

How to Pick the Right Non-Core Vaccines (Lifestyle Guide)

Use this quick decision guide with your vet:

• Strictly indoor, single-cat home: Core vaccines only
• Indoor with occasional balcony or garden access: Core, plus FeLV during kittenhood
• Outdoor or indoor-outdoor: Core and FeLV annually, with Chlamydia or Bordetella if at local risk
• Multi-cat household or fosters: Core and FeLV for every cat, plus testing before adding new arrivals
• Travel or boarding often: Core, rabies up to date, Bordetella if your boarder requires it
• Shelter or rescue-exposed kittens: Core and FeLV, with testing for both FeLV and FIV first

This checklist is the kind of asset many shelters and cat-care blogs bookmark, so save and share it freely.

What to Do If Your Cat Misses a Vaccine or Is a Rescue

Life happens. If a kitten misses a dose by more than two to three weeks, vets often restart or add a booster to make sure immunity takes hold. For adult cats with unknown history, strays, rescues, or cats from informal rehoming, most vets will either restart the core series or run titer testing to measure existing immunity before deciding.

Cat Vaccine Side Effects and Post-Shot Care

Normal Reactions to Expect

Mild soreness at the injection site, a quiet 24 hours, a slight fever, or a small appetite dip are all common and usually fade within a day or two.

When to Call the Vet Urgently

A Note on Injection-Site Sarcoma

Feline injection-site sarcoma is a rare tumour that can develop at the site of any injection, not just vaccines. Estimated rates from veterinary associations suggest it occurs in roughly 1 in 10,000 to 1 in 30,000 vaccinated cats. Your vet will choose low-reaction vaccine types and rotate injection sites to reduce the small risk. Benefits still outweigh risks for almost every cat.

How Much Do Cat Vaccinations Cost?

Costs vary widely by country and clinic. In most regions, a full kitten vaccination course costs a moderate one-time amount in local currency, with annual boosters costing less. Many charities, shelters, and mobile clinics run low-cost vaccine days. Pet insurance or wellness plans can also spread the cost.

A practical tip: ask for the clinic's price list before booking, and ask whether a combined wellness visit is cheaper than separate appointments.

FAQ

Conclusion

A well-followed cat vaccination schedule is the quietest, kindest protection you can give your cat. It keeps painful diseases out of your home, keeps you compliant with local laws, and buys your cat years of healthy, happy life. Talk to your vet, mark the dates on your calendar, and keep the records somewhere safe.

If this guide helped, share it with one fellow cat parent, or drop a comment with the vaccine question you still want answered. Your cat, and someone else's, will thank you.