Cat litter: the real monthly cost, type by type
The monthly cost of cat litter runs from 8 to 30 € for a single cat, depending on the substrate type and how rigorous the upkeep is. Counter-intuitive but true: the cheapest litters per bag are often the most expensive per month, because they need a full change more often. Here are the real figures, type by type.
What is the real monthly cost of each litter?
- Classic clay (non-clumping): 5-8 € a bag, but a full weekly change: 15 to 25 € per month.
- Clumping clay: 8-15 € for a 10 L bag; you only remove the soiled clumps: 10 to 18 € per month.
- Silica: 10-15 € a bag, changed every 3 to 4 weeks: 10 to 15 € per month.
- Plant-based clumping (wood, hemp): 12-18 € a bag: 12 to 20 € per month, with urine sometimes compostable.
- Wood pellets: the secret weapon, 4 to 6 € for a 15 kg bag from the DIY store: 5 to 10 € per month.
Why does cheap litter cost more per month?
A bargain-bin clay litter does not clump: urine soaks the whole base of the box, which turns smelly within days and forces a full change. A quality clumping litter forms compact clumps you scoop out: the rest of the box stays clean for three to four weeks. You end up using half as much litter — the same logic as the upkeep described in our article scented litter: a bad idea in disguise.
How do you cut the cost without compromising hygiene?
Buy large formats (20 L bags or multipacks), fill to 7 cm — too little litter makes urine stick to the bottom, too much gets wasted in digging — and scoop daily. A mat under the box catches scattered granules, which go back in the box instead of into the vacuum cleaner. The choice of box matters too: see our comparison open or covered litter box.
Should you budget more with several cats?
Yes, and more than proportionally: two cats need three boxes (the one-box-per-cat-plus-one rule), so nearly triple the substrate, i.e. 25 to 45 € per month. A sudden change in toileting habits remains, moreover, a reason to see the vet — not a budget problem. Find all our guides in the cat care and grooming category.
Frequently asked questions
Do wood pellets suit all cats?
Most accept them, but some cats with sensitive pads or used to fine grain refuse. Transition gradually over two weeks, mixing the two.
Does silica litter really last a month?
Three to four weeks for a single cat if you remove the stools daily and stir the crystals. Beyond that, saturation is immediately noticeable.
Can you flush litter down the toilet?
No for clay and silica (pipes, water treatment plants). Some plant-based litters tolerate it in small quantities, but the bin remains the rule.
This guide is part of Planète Pets’s Cats universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.