Indoor cats get fleas. They arrive on the family dog, on trouser legs, and through the front door.
An indoor-only cat has a lower risk, not a zero risk, and the consequences of an infestation in a closed environment are worse rather than better — there is nowhere for the population to disperse. By the time you see a flea on the cat, the carpet holds the rest of the life cycle.
Year-round cover is cheaper than treating a house. We will tell you which product fits your household, and we will tell you honestly when a cat genuinely does not need one.