Why is my cat not peeing in the litter box?

Your cat not using the litter box to pee could be due to the following reasons:

Insufficient litter box cleaning: If the litter box is not cleaned promptly, it may become dirty or have a foul smell, causing the cat to unwillingly use it for peeing. Therefore, owners should clean the litter box daily and disinfect it regularly.
Change in litter or litter box: If the cat suddenly experiences a change in litter brand or litter box location, it may not adapt to the new situation and avoid using the litter box. When changing the litter brand, mix the new and old litter together gradually in a certain ratio, giving the cat a transitional period.
Spraying due to heat: If the cat is not spayed or neutered, it may spray urine randomly due to sexual maturity. Some cats do this to mark their territory or attract mates, rather than using the litter box. If the owner does not intend to breed the cat, consider getting it sterilized at a pet hospital.
Urinary tract issues: If the cat starts peeing frequently outside the litter box suddenly, it could be due to urinary tract infections or bladder inflammations, which cause the cat discomfort and difficulty urinating. If this occurs, it's recommended to take the cat to the vet for examination and treatment.

Remember, cats are clean animals and it's essential to maintain a clean and comfortable litter box for them. Consult a veterinarian if you notice any persistent issues or concerns.