Does a cat live outside or inside longer?

Indoor cats usually live longer than outdoor cats because outside cats are able to get more diseases, rabies, or hurt/killed by another animal. Indoor cats are less likely to get diseases or get rabies, which is why it is incredibly important to vaccinate your cat when required, especially when it is allowed to be outside.

Outdoor cats are also at risk of being hit by cars. A cat cannot outrun a car, and such incidents are very common.