Start with a veterinary check
Before you change anything about the litter box setup, take your cat to a veterinarian. Sudden changes in litter box use almost always signal a medical problem first—urinary tract infections, kidney disease, diabetes, digestive issues, or pain from arthritis can all make a cat avoid the box. Your vet can rule these out with a physical exam and urine or blood tests, which takes the guesswork out of what comes next.
If your cat has been using the box normally until recently, medical causes are the most likely explanation. Even if your cat seems otherwise healthy, a vet visit is the fastest way to know whether you are solving a behavior problem or a health problem. Once medical issues are ruled out, the steps below will work.
Key Takeaways
- A sudden change in litter box use usually means a medical problem, so a vet visit should come before any other changes.
- Cats often stop using the box because it is dirty, in a new location, or filled with litter they dislike—start by cleaning it daily and keeping it in the same spot.
- Add a second or third box in different rooms, especially if you have multiple cats or a multi-story home.
- If your cat is avoiding the box out of fear or stress, a larger box, a box without a lid, or a box placed away from noisy appliances can make a real difference.
- Punishment or scolding will make the problem worse; instead, reward your cat with treats or praise the moment you see them use the box.
Clean the litter box daily and use unscented litter
A dirty box is the single most common reason a cat stops using it. Scoop out clumps and waste at least once a day, and empty and refill the entire box with fresh litter once a week. Cats have a strong sense of smell and will avoid a box that feels or smells unclean to them, even if it looks acceptable to you.
If you recently switched litter brands or types, switch back. Cats are particular about texture and smell. If your cat has been using the same litter for years and suddenly stopped, the litter itself may not be the problem—but if you changed brands around the same time the behavior started, that could be it. Unscented, clumping litter works for most cats; avoid heavily perfumed varieties and crystal litters unless your cat was already using them.
If you have been using a litter box liner, remove it. Many cats dislike the feel of liners under their paws and will go outside the box to avoid them.
Keep the box in the same location and away from stress
Moving a litter box confuses cats. If you recently moved the box to a new room or a new spot in the same room, move it back to where it was before. Cats navigate by memory and habit; a box in a new place feels like a new box, and your cat may not find it or may not trust it.
Place the box away from loud appliances like washing machines, dryers, or furnaces. A cat that gets startled by noise while using the box may associate the box with fear and avoid it. Similarly, keep the box away from the cat's food and water bowls—cats naturally avoid toileting near where they eat.
If you live in a multi-story home or have a large house, the location matters even more. A cat that has to travel far to reach the box may decide to go elsewhere. This is especially true for older cats or cats with mobility issues.
Add more litter boxes to your home
The general rule is one box per cat, plus one extra. If you have one cat, use two boxes. If you have two cats, use three. Multiple boxes reduce competition and give your cat options if one box is dirty or blocked by another cat.
Place boxes in different rooms or different areas of your home. If your cat spends time upstairs and downstairs, put a box on each level. If your cat has a favorite sleeping spot far from the current box, add a box nearby. Cats are more likely to use a box that is convenient to where they already are.
Even if you think one box should be enough, adding a second box often solves the problem within days. It is one of the easiest changes to make and one of the most effective.
Use a larger box or remove the lid
Some cats dislike covered litter boxes because they feel trapped or because the space is too small. If your box has a lid or hood, try removing it or switching to an open box. An open box gives your cat a clear view of their surroundings and an straightforward escape route, which many cats prefer.
If the box itself is small, upgrade to a larger one. A box should be at least 1.5 times the length of your cat's body. A cramped box makes it hard for your cat to turn around and bury waste, which can discourage use. Large storage containers or under-bed storage boxes work well as DIY litter boxes and are often cheaper than commercial options.
If your cat has been using a covered box without problems, do not change it unless other steps have failed. Some cats prefer the privacy a lid provides. The key is matching the box to your individual cat's preference.
Reward your cat for using the box
The moment you see your cat use the litter box successfully, give them a treat or praise them warmly. This teaches your cat that using the box leads to something good. Repeat this every time you catch them using it, for at least two to three weeks.
Never scold, yell at, or punish your cat for going outside the box. Punishment creates fear and stress, which makes the problem worse. Your cat is not being stubborn or spiteful—they are either sick, uncomfortable, or scared. Punishment teaches them to hide when they toilet, not to use the box.
If you find an accident after the fact, clean it up without comment. Your cat will not understand a delayed punishment and will only become anxious around you.
Clean accidents with enzymatic cleaner
When your cat goes outside the box, clean the spot thoroughly with an enzymatic cleaner made for pet urine. Regular household cleaners do not break down the urine compounds that cats can smell. If your cat can still smell their own urine in a spot, they are more likely to go there again.
Soak the area with enzymatic cleaner, let it sit for the time recommended on the bottle (usually 10 to 15 minutes), and then blot it dry. Do this for every accident until the behavior stops. This removes the scent marker that tells your cat "this is a toilet spot."
Frequently Asked Questions
How long does it take for a cat to start using the litter box again?
If the problem is medical and treated, or if it is a straightforward fix like a dirty box or a new location, you may see improvement within days. If stress or fear is involved, it can take two to four weeks of consistent changes before your cat fully returns to the box. Patience and consistency matter more than speed.
What if my cat uses the box sometimes but not always?
Inconsistent use usually means the box is not meeting your cat's needs in some way. Check that it is clean daily, that there are enough boxes in your home, and that none of them are blocked or hard to reach. If medical issues have been ruled out, add a second or third box and see if that helps.
Can stress or moving cause a cat to stop using the litter box?
Yes. Major changes like moving to a new home, a new pet arriving, or loud renovations can trigger litter box avoidance. Keep the box in a quiet, safe spot and maintain a consistent routine. Extra boxes and more frequent cleaning help during stressful periods.
Should I use a different type of litter to encourage my cat back to the box?
Only if your cat was already using a different type before the problem started. If you want to experiment, offer two boxes side by side—one with the old litter and one with a new type—so your cat can choose. Most cats prefer unscented, clumping litter, but individual preferences vary.
What if nothing works and my cat still will not use the box?
Return to your veterinarian. Persistent litter box avoidance despite multiple changes often points to a medical issue that was missed the first time, or to severe stress or anxiety that may need professional behavior support. Your vet can refer you to a feline behavior specialist if needed.