Although cats may seem content with their independent lifestyles, they are social creatures and deserve companionship. The folks at Purina have suggested that cats should not be left alone in a house for more than eight hours a day, as what happens can lead to loneliness and depression. Be sure to leave the drapes open so your feline friend can get some natural light.
But depending on your cat’s personality, you might be able to leave it for longer than eight hours. Just don't forget to fill the food and water bowl. Overall, cats have similar needs as humans; friendship, food, and water.
Be extra vigilant after bringing a new cat home. You'll want to observe what happens if your cat is left in a dark house. Help your new family member acclimate before leaving it alone for too long.