Cat Pooping Outside the Litter Box? Causes and How to Fix It

A cat pooping outside the litter box, or peeing beside it, is usually telling you something is wrong with its health or with the box itself. Rule out a medical problem with your veterinarian first, then look at the box: how clean it is, how many boxes you have, its size and entry height, the litter, and where it sits. Most cases improve once the cause is found and fixed.

This guide is general information for cat owners, not veterinary advice. Peeing or pooping outside the box can have a medical cause that only a veterinarian can identify, so book a visit before you treat it as a behavior problem.

Below are the warning signs that need a vet, the most common box-related causes, how to tell peeing from pooping problems, and a step-by-step plan to get your cat back in the box.

See Your Veterinarian First

Medical problems such as constipation, diarrhea, urinary tract issues, and joint pain in older cats can all make a cat avoid the box. A cat may link the box with discomfort and start going somewhere else, even after it feels better. Only a veterinarian can tell what is going on.

• Emergency: a cat, especially a male, straining in or near the box without passing urine. Call your veterinarian or an emergency clinic right away.
• Call the same day: blood in the urine, many trips with little urine, diarrhea that does not settle, hard or painful stools, or a cat that stops eating or drinking.
• Book a visit soon: any sudden change in where, how often, or how your cat uses the box.

Peeing Outside the Box vs Pooping Outside the Box

The pattern gives clues. A cat that pees beside the box but still poops in it may dislike the litter or the box, or may be uncomfortable when it urinates. A cat that poops just outside the box, often right next to it, may find the box too dirty, too small, or hard to climb into, especially with stiff joints. Peeing on soft items such as beds or laundry, or on vertical surfaces, points to stress or marking. If urine is the main problem, our guide to cats peeing around the house covers marking and stress in more detail.

Common Litter Box Causes

• A dirty box. Many cats will not use a box with old clumps in it. Scoop at least once a day.
• Too few boxes. A common rule of thumb is one box per cat plus one extra, in different spots.
• The wrong size or height. A cramped box or a tall entry can push a cat to go just outside it. Older cats often need a lower step in; see these low-entry litter boxes for senior cats.
• A hood or liner the cat dislikes. Some cats avoid covered boxes or the feel of a plastic liner.
• A sudden litter change. A new texture or a strong scent can put a cat off. Unscented clumping litter is a common starting point; compare options in our best cat litter picks.
• A bad location. Boxes next to loud appliances, in busy hallways, or near food bowls get avoided.
• Another cat in the way. In multi-cat homes, one cat may guard the box. Our guide on helping cats get along covers setting up shared space.

How to Get Your Cat Back in the Box

1. Rule out a medical cause with your veterinarian.
2. Clean every accident with an enzyme cleaner made for pet messes. Avoid ammonia-based cleaners, which can smell like urine to your cat, and never mix cleaning products.
3. Scoop daily and fully replace the litter on a regular schedule.
4. Add a box, ideally where the accidents happen, then move it gradually to a better spot.
5. Go back to the litter your cat used before, or offer a second box with a different litter side by side.
6. Try a larger or lower box, or remove a hood, if size or entry looks like the problem. Our best litter box picks cover open, covered, and high-sided styles.

Give changes a week or two before judging them, and change one thing at a time so you can tell what worked.

Stress and Changes at Home

A move, a new pet, a new baby, visitors, or even rearranged furniture can upset a cat’s routine. Keep feeding and play times steady, give your cat quiet places to rest, and keep at least one box somewhere calm. If accidents continue after a clean vet visit and box changes, your veterinarian can refer you to a qualified behavior professional.

Frequently Asked Questions

Why is my cat pooping outside the litter box all of a sudden?

A sudden change often has a medical cause, such as constipation, diarrhea, or pain, so call your veterinarian. If your cat is healthy, check for a dirty box, a new litter, or a change at home.

Why is my cat peeing beside the litter box?

Peeing right next to the box can mean the cat wants to use it but something about it is off: the box is dirty, too small, or uncomfortable, or the cat feels pain when urinating. Rule out a urinary problem with your veterinarian first.

Should I punish my cat for going outside the box?

No. Punishment adds stress and can make the problem worse. Clean the spot thoroughly and work on the cause instead.

How many litter boxes do I need?

A common rule of thumb is one per cat plus one extra, placed in different parts of the home.

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