Cat Not Using the Litter Box

Rule Out a Medical Cause First

Before you change anything about the box, have your cat seen by a veterinarian, particularly if the change was sudden. Several common health problems cause a cat to avoid the litter box or to urinate in the wrong places, and no amount of cleaning or rearranging will fix them.

Urinary tract disease and cystitis make urinating painful, and a cat quickly learns to avoid the box it links with that pain. Bladder stones and crystals do the same. Kidney disease and diabetes make a cat produce far more urine, which can overwhelm the box and lead to accidents, and both are often first noticed because the cat is drinking a lot of water. In older or stiff cats, arthritis can make a high-sided box simply too hard and too painful to climb into, so they go right next to it instead.

Because so many of these causes look the same from the outside, a vet visit with a urine test and, when needed, bloodwork is the reliable way to tell them apart. Explore related signs in our Cat Health guides.

Step-by-Step Troubleshooting Checklist

After a clean bill of health from your vet, go through these steps in order. Change one thing at a time so you can see what actually helps.

1. Confirm the vet check is done. If you have not ruled out a medical cause, stop here and book that visit first.
2. Scoop daily and wash regularly. Most cats will avoid a soiled box. Scoop at least once a day and wash the box with mild soap on a regular schedule.
3. Count your boxes. Aim for one box per cat plus one, so one cat has two and two cats have three, spread across different rooms and floors.
4. Check the location. Move boxes away from noisy appliances such as washers and furnaces, out of busy hallways, and somewhere quiet and easy to reach, away from food and water.
5. Rethink the box style. Try an uncovered box for cats that dislike hoods, and a low-entry box for kittens, seniors, or stiff cats.
6. Revisit the litter. Offer unscented, fine-grained litter about two inches deep, and if you recently switched brands or scents, go back to the old one.
7. Clean accidents thoroughly. Use an enzymatic cleaner on soiled spots so leftover odor does not draw your cat back to the same place.
8. Lower stress. Address new pets, new people, moves, or conflict between cats, and add resources such as perches, hiding spots, and feeding stations.
9. Never punish. Scolding or rubbing a cat's nose in an accident increases stress and makes avoidance worse.

Spraying vs House-Soiling

It helps to know which problem you are dealing with. House-soiling means the cat squats and empties its bladder on a horizontal surface such as the floor, a rug, or a bed. This usually points to a medical issue or a dislike of the box, and it is what most of this guide addresses.

Spraying, or urine marking, looks different. The cat stands, backs up to a vertical surface like a wall or the side of the furniture, quivers its tail, and leaves a small amount of urine as a territorial signal. Marking is usually driven by stress, a new pet or person, or the sight or smell of cats outdoors, and both spayed and neutered cats can do it. If the pattern looks like marking rather than soiling, the fix leans more toward reducing stress and managing territory than toward changing the box.