Best Cat Litter Box Under $100 (October 2026)

The size rule, which solves most problems

The guidance most commonly given by veterinary behavior sources is that a litter box should be about one and a half times the length of the cat, measured nose to base of tail. Most boxes sold in pet shops are considerably smaller than that for an average adult cat.

A cat needs room to turn around, dig, position itself and cover afterwards without touching the sides. A box that is too small produces exactly the behaviors owners complain about: eliminating over the edge, refusing the box, or going elsewhere entirely.

The practical consequence is one of the better value hacks in pet ownership: a plain under-bed storage tub makes an excellent litter box, is far larger than most purpose-made boxes, and costs a fraction. If the sides are too tall for an older cat, cut a U-shaped entrance in one end and sand the edge smooth.

The other number that matters: one box per cat, plus one. Two cats need three boxes, in different locations. This is the second most common cause of litter box problems after size.

Open or hooded?

Hooded boxes are popular with owners for obvious reasons - they contain smell and hide the contents. Cats are frequently less enthusiastic.

The case against hoods: they trap odor inside, where the cat is, which is unpleasant for an animal with a far better sense of smell than yours. They restrict escape routes, which matters to a cat that is wary of being cornered - particularly in a multi-cat household. And they make it easy for an owner to not notice the box needs cleaning, because they cannot see it.

The case for: they contain litter scatter, which is a real benefit, and some cats genuinely prefer the privacy.

Our default recommendation is open and large, with high sides to contain scatter rather than a hood. If your cat has used a hooded box happily for years, there is no reason to change it - but if you are having problems, removing the hood is a free experiment worth running.

• 1.5x your cat's length. Most boxes sold are too small.
• One per cat plus one, in separate locations.
• Open with high sides beats hooded for most cats.

The case against cheap self-cleaning boxes

Automatic litter boxes are the obvious thing to want and the one purchase in this category we would steer you away from at this price.

Cheap mechanisms jam. A rake or rotating drum driven by an underpowered motor stalls on a large clump or on litter stuck to the base, and a jammed self-cleaning box is dirtier than a manual one because nobody is watching it.

Many cats refuse them. The motor noise and the movement are genuinely off-putting to a significant number of cats, and a cat that will not use its box finds somewhere else.

They hide the evidence. This is the one that matters most and gets mentioned least. Litter box output is one of the main ways owners notice early illness - changes in urine volume are an early indicator of kidney disease and diabetes, both common in older cats. A box that disposes of everything automatically removes that signal.

The good ones cost several times this budget, and even those require proprietary litter or disposal cartridges with an ongoing cost.

If scooping is genuinely the barrier, a larger box with better litter makes it a thirty-second job rather than removing it entirely.

Litter matters more than the box

Most research on cat litter preference points the same way: cats generally prefer fine-grained, unscented clumping litter - the texture closest to sand, which is what they would use outdoors.

Unscented. Perfumed litter is designed for the human nose and cats frequently dislike it. If your cat is avoiding the box, scented litter is one of the first things to change.

Depth of about 2-3 inches. Enough to dig and cover properly. Too shallow and they cannot bury; too deep and some cats dislike the instability.

Change litter brand gradually if at all. Cats form strong substrate preferences and an abrupt change is a documented cause of box avoidance.

Litter is also the larger long-run expense. The box is a one-off; litter is monthly, which is worth remembering when comparing a $25 box to a $90 one.

When a litter problem is a vet problem

Important enough to state plainly. A cat that suddenly stops using a box it has always used is often telling you something medical rather than behavioral.

Straining, frequent small urinations, crying in the box, blood, or going just outside the box are all signs that warrant a vet visit rather than a new box. Urinary blockage in male cats is a genuine emergency and can be fatal within a day.

Buy the bigger box, use unscented clumping litter, add one more box than you have cats - and if the problem started suddenly in a cat that was previously fine, call the vet first.