Quick answer: Scoop the litter box at least once a day, empty it and refill it with fresh litter every week, and scrub it with hot water and mild, unscented soap every week or month. Replace the box once a year, and keep one box per cat plus one extra.
Cats are tidy animals, and a dirty litter box is one of the quickest ways to make one look for somewhere else to go. Yet many owners are unsure how often to clean a litter box: daily scooping, weekly changes, monthly scrubbing? This guide pulls together the advice from VCA Animal Hospitals, the ASPCA and the AAHA/AAFP Feline Life Stage Guidelines into one simple schedule. It also covers how many boxes you need, where to put them, and what the box can tell you about your cat’s health.
How often to clean a litter box: the short version
VCA Animal Hospitals recommends this routine:
| How often | What to do | Notes |
|---|---|---|
| Every day | Scoop out all clumps and solid waste | Some cats like it scooped more often (VCA). The AAHA/AAFP guidelines also say scoop daily. |
| Every week | Empty all the litter, remove residue and refill with clean litter | The ASPCA suggests washing the box weekly too |
| Every month | Empty and scrub the box with hot water and mild soap | VCA notes some cats prefer this weekly |
| Every year | Replace the litter box completely | VCA recommendation |
Why do the sources differ a little on scrubbing? The ASPCA advises washing all boxes once a week with warm water and unscented soap, baking soda or no soap, and fully replacing the litter. VCA says monthly scrubbing suits many cats, but some prefer weekly. If your cat is fussy, or you have several cats, weekly is the safer choice.
Why a clean box matters so much
VCA puts it simply: most cats are fastidious, and keeping the litter clean is one of the most important factors in maintaining good litter habits. The AAHA/AAFP Feline Life Stage Guidelines note that some cats seem quite sensitive to dirty boxes. A box that smells or is full of clumps can push a cat to use the rug, the bath mat or a quiet corner instead. If that is already happening, read our guide on why a cat pees outside the litter box.
How to clean a litter box properly
Daily scooping
- Scoop all urine clumps and feces, digging to the bottom and corners.
- Top up with fresh litter to keep a consistent depth. The ASPCA says most cats prefer one to two inches of litter.
- Bag and dispose of the waste.
- Wash your hands afterward.
Weekly or monthly deep clean
- Empty all the litter.
- Wash the box with hot water and a mild, unscented soap, or just hot water. The AAHA/AAFP guidelines say soap or strong chemicals should be avoided and that hot water is best.
- Rinse well and dry completely.
- Refill with fresh litter to the usual depth.
What not to use
Avoid strongly scented cleaners. The ASPCA explains that cats can develop an aversion to the scent. Never clean accidents around the home with ammonia-based products. Urine contains ammonia, so the ASPCA warns that an ammonia cleaner may attract your cat back to the same spot.
How many litter boxes do you need?
The rule of thumb from VCA, the ASPCA and the AAHA/AAFP guidelines is one box per cat, plus one extra. Two cats need three boxes. VCA also suggests:
- A box on every floor of the home
- A box on the same level as your cat’s favorite resting places, since cats often head to the box after a nap
- Boxes spread across different areas rather than side by side, especially if your cats compete or ambush each other
Bringing home another cat? Our guide on your new cat’s first week covers setting up their own box from day one.
Choosing the right box and litter
Size
Many boxes sold in stores are too small. VCA and the AAHA/AAFP guidelines say a box should be about one and a half times the length of your cat. The guidelines measure from nose to tip of tail. Large storage containers with a cut-out entry often work well for big cats.
Sides and entry
High sides help cats that stand while they pee. Kittens, seniors and cats with stiff joints need a low entry they can step over easily. If your older cat has started missing the box, our article on signs of arthritis in cats may help explain why.
Litter type
The ASPCA says most cats prefer clumping, unscented litter with a medium to fine texture. The AAHA/AAFP guidelines add that unscented clumping litter may be preferred for cats with a history of urinary problems. Cats have individual preferences, so if you want to try a new litter, offer it in a second box rather than switching all at once.
Lids and liners
The ASPCA notes that most cats do not like box liners or lids. If your cat is avoiding a covered box, try removing the hood.
Where to put the litter box
Choose a quiet, easy-to-reach spot where your cat will not be disturbed or cornered. VCA advises keeping boxes away from beds and food bowls. The AAHA/AAFP guidelines recommend quiet locations that give the cat an escape route.
That means planning your cat’s zones around the home. Keep the bathroom area in one place, the food and water in another, and comfortable resting spots in a third. A washable bed like our Teddy Fleece Cat Pad makes a good nap spot near, but not next to, the litter area. A covered hideaway such as our pop-up cat play tent gives a shy cat a safe place to retreat after using the box.
What the litter box can tell you about your cat’s health
Daily scooping is also a daily health check. Watch for changes like these and call your vet if you notice them:
- More or larger urine clumps than usual, which can go with increased thirst. See why is my cat drinking so much water?
- Frequent trips with only small amounts of urine. The ASPCA notes this can be a sign of a urinary tract infection.
- Straining with little or no urine. The Cornell Feline Health Center warns that a urethral obstruction is a true emergency, and male cats are at greater risk.
- Small, hard stools or no stool for a couple of days. Read our guide to cat constipation.
- Diarrhea, blood or mucus in the stool.
The AAHA/AAFP guidelines also say cats should never be punished for going outside the box. Prompt vet care helps rule out medical problems before the habit becomes entrenched.
Should pregnant people clean the litter box?
Cat feces can carry Toxoplasma, the parasite that causes toxoplasmosis. The CDC recommends changing the litter box daily, because the parasite does not become infectious until 1 to 5 days after a cat sheds it. Scooping every day removes feces before that happens. The CDC also advises washing your hands with soap and water after contact with anything that may be contaminated with cat feces, and feeding cats commercial food or well-cooked food rather than raw meat. If you are pregnant or have a weakened immune system, the CDC says to talk to your healthcare provider. Many people in that situation ask another household member to handle the litter box.
Create a cozy rest zone for your cat
Keep sleeping spots clean and separate from the litter area. Our washable Teddy Fleece Cat Pad gives your cat a soft place of their own.
Frequently asked questions
How often should you scoop a litter box?
At least once a day. VCA, the ASPCA and the AAHA/AAFP guidelines all recommend daily scooping, and some cats prefer it scooped more often.
How often should you completely change cat litter?
VCA recommends emptying all the litter and refilling with clean litter every week. The ASPCA also suggests fully replacing the litter weekly when you wash the box.
What should I use to clean a litter box?
Hot water and a mild, unscented soap, or just hot water. The AAHA/AAFP guidelines say to avoid strong chemicals. Avoid scented and ammonia-based cleaners.
How many litter boxes do I need for 2 cats?
Three. The rule of thumb is one box per cat plus one extra, placed in different areas of the home.
How often should you replace a litter box?
VCA recommends replacing the litter box completely once a year.
Why does my cat's litter box smell even after scooping?
Old litter and residue build up over time, so a box can keep smelling. Change all the litter weekly, scrub the box regularly and replace it yearly.
Keep reading
- Why is my cat peeing outside the litter box?
- Cat constipation: signs, causes and when to call the vet
- Why is my cat drinking so much water?
- Bringing a new cat home: first-week guide
Sources
- VCA Animal Hospitals – Housetraining for Kittens and Cats
- ASPCA – Litter Box Problems
- AAHA/AAFP Feline Life Stage Guidelines – General Litter Box Considerations
- Cornell Feline Health Center – Feline Lower Urinary Tract Disease
- CDC – Preventing Toxoplasmosis
This article is general information, not veterinary advice. If you are worried about your cat’s health, contact your veterinarian.
