Your cat curls up beside you on the couch, and it’s easy to think the biggest decisions about her health happen at the vet’s office. Yet one choice woven into your daily routine could affect how many years you have together, and it may be one you’ve never thought to question.
In short
- Letting your cat live outdoors full-time is the everyday decision that can take years off their life.
- Indoor cats typically live 12 to 18 years; outdoor-only cats live 2 to 5 years.
- Cars, toxins, and parasites are among the dangers outdoor cats face.
- Indoor-outdoor cats in a UC Davis study did not have significantly shorter lifespans than indoor-only cats.
Keeping your cat indoors makes a big difference
Your cat has found the warm patch of sunlight on the living room floor. Later, she may sit at the window and watch the yard. You get to enjoy both moments knowing she is on your side of the door.
That door matters. In a 2022 study, UC Davis researchers examined records from more than 3,100 cats seen at the university’s veterinary hospital between 1989 and 2019. Cats that lived outdoors full-time died younger than both indoor-only cats and cats that spent time indoors and outdoors.
The median age at death for outdoor-only cats was 7.25 years. Put that beside the commonly cited lifespan ranges of 12 to 18 years for indoor cats and 2 to 5 years for outdoor-only cats, and you can see why where your cat lives deserves real thought. It shapes how much time you may have together.
Free roaming brings risks home
When your cat slips out to wander, you cannot choose what she meets. A car can cross her path. She can encounter toxins or pick up parasites. Those are among the risks linked to the shorter lives of free-roaming cats.
The difference is not about whether a cat enjoys fresh air. It is about spending day after day outside without you there to look after her. The UC Davis researchers found a clear lifespan gap for cats that lived outdoors full-time, not for the cats whose lives included time indoors.
That distinction makes the everyday choice easier to picture. Your cat can watch the birds from the window, then come back to the couch when she is ready. You do not have to let her roam freely to give her a view of the yard.
Your cat can still spend time outside
You might love watching your cat sniff the air and take in the yard. Keeping her indoors does not mean every outdoor moment is off the table. A catio, an enclosed garden, or a leash walk gives her a way to be outside with boundaries around where she goes.
In the UC Davis study, researchers found no significant lifespan difference between indoor-only and indoor-outdoor cats. The sharp difference was between outdoor-only cats and both of those groups. So the decision that matters most is not whether your cat ever feels grass beneath her paws. It is whether she lives outside on her own.
The limit
The UC Davis study compared records of cats after death; it did not test catios or leash walks separately, and its median age for outdoor-only cats is not the same measure as the general lifespan ranges. Indoor-outdoor also does not always mean supervised outdoor time. A cat accustomed to roaming may take time to adjust, and a catio or leash walk takes effort from you. No choice guarantees a long life, but the evidence gives you a strong reason to keep unsupervised, full-time outdoor living off the table.
