Cat Health

How Often Should You Clean a Cat Litter Box?

The litter box is the single most informative object in a cat household. Cleaning it often is partly hygiene and partly monitoring — you cannot spot a change in urine output in a box you never look at.

The Urban Feline EditorialUpdated 6 min read
A calm cat being gently handled on a soft blanket
Health information on this website is for educational purposes and should not replace advice from a qualified veterinarian.

The cleaning schedule

TaskFrequency
Scoop solids and clumpsAt least once daily; twice is better
Top up litterAs needed to keep 5–7cm depth
Full change and wash with mild soapEvery 2–4 weeks for clumping litter
Replace the box itselfWhen plastic is scratched and holds odour

How many boxes

One per cat plus one spare, in different locations. Two boxes side by side count as one location to a cat.

What to watch for

  • More or fewer urine clumps than usual
  • Straining, frequent small visits, or vocalising in the box
  • Blood, or urine outside the box
  • Diarrhoea or no stool for more than a day or two

Straining is an emergency

A cat — particularly a male cat — that strains repeatedly without producing urine may have a urinary blockage. This is life-threatening and needs emergency veterinary care the same day.

Managing odour without deterring the cat

Skip scented litters and air fresheners near the box; strong smells put many cats off. Frequent scooping, an adequately large uncovered box and good ventilation solve odour far more reliably.

A note on veterinary advice

Health information on this website is for educational purposes and should not replace advice from a qualified veterinarian. If something about your cat has changed, book an appointment rather than waiting to see what happens.

Frequently asked questions

Can I clean the box with bleach?
Use mild unscented dish soap and rinse thoroughly. Ammonia-based cleaners smell like urine to a cat, and strong disinfectants can be irritating if residues remain.
Why is my cat suddenly going outside the box?
Common causes include a medical problem, a box that is too dirty or too small, a change in litter, or stress. Start with a veterinary check to rule out urinary and digestive causes.
Covered or uncovered box?
Most cats prefer uncovered. Covers trap odour inside and reduce escape routes, which matters in multi-cat homes.

About this guide

We research, write and update every guide on this site. Our articles are general educational information for cat owners and are reviewed against current guidance from veterinary and feline welfare organisations. Read our editorial policy.

More in Cat Health

Better Cat Care, Delivered

Get practical indoor-cat tips, helpful guides, and product recommendations delivered to your inbox.

A short email now and then. Unsubscribe any time.