Unless you know the cause of the problem for sure, a trip to the vet is never a bad idea when a cat is first discovered spraying or inappropriate urinating outside the box. I hate it, but he's driving me nuts, with only 5 hrs a sleep at night. He may be neutered but still look like a male.
Stop Cat Peeing Rug
Second-- If you have had other cats in the house or you bought a house with previous cats in there they can smell it and mark their also. Some people are lucky enough to have very few stop cat urine spraying issues to deal with, others have daily messes to clean up. I.