Deep Top Entry Litter Box: How to Choose the Right Depth?

⚡ Quick Verdict

📋 How We Evaluated

We scored each box on four things: how well it contains odor, how much litter still ends up on the floor, wall height and material thickness, and how easy the lid is to lift when you’re scooping one-handed with a full dustpan in the other. We also read through hundreds of verified buyer reviews looking for recurring complaints, not just star ratings.

Protection	Microban Technology
Entry Style	Wide Top Entry
Material	Recycled Materials
Origin	Made in USA

What We Found

Arm & Hammer built this one around Microban, an additive baked into the plastic that keeps odor-causing bacteria from multiplying on the surface. It won’t stop smell from a dirty box, but it does mean the plastic itself doesn’t hold onto stink the way older boxes do after a year of use. The top opening is wide enough for cats up to around 15 pounds to climb through without squeezing.

The exit grate does its job. Paws get brushed clean before your cat steps down, and the walls are tall enough to stop most spraying cats from hitting the floor outside. It’s made from recycled plastic, so it’s a reasonable pick if that matters to you, and it works fine with clay, pine, or clumping litter.

Who It’s For

Good for owners of larger cats, anyone dealing with strong odor in a small apartment, and buyers who’d rather pay more up front than replace a cheap box every year.

Dimensions	20.5 x 14.75 x 14.38 inches
Color	Gray/White
Entry Type	Top Entry
Material	Durable Plastic

What We Found

The textured lid is where this box earns its spot. Instead of a smooth surface, IRIS molded a grooved pattern into the exit path, and it pulls loose granules off your cat’s paws before they hit your floor. It’s not perfect. Fine clumping litter still sneaks through occasionally, but the difference compared to a flat-lid box is real.

At 20.5 by 14.75 inches, it’s compact enough for a small bathroom or laundry closet without feeling cramped for a medium cat. The high walls handle spraying well, and the enclosed shape keeps odor from spreading through the room, though plastic does start to hold onto smell after a year or two of regular use.

Who It’s For

Apartment dwellers with limited floor space, households with a small dog that likes to investigate the litter box, and anyone tired of sweeping litter off the bathroom tile every day.

Dimensions	20.5 x 14.75 x 14.38 inches
Color	Black/Gray
Entry Type	Top Entry
Design	Hooded Privacy

What We Found

Same shell as the gray IRIS model above, just in black and gray. It hides dirt and stains better than the lighter version, which matters if you’re not scooping every single day. The textured lid, tall walls, and enclosed shape all carry over, so the tracking and privacy numbers land in the same range.

One thing worth knowing: the dark plastic shows dust and litter dust on top far more than the gray or beige versions do. It looks clean from a distance but needs a quick wipe-down more often to actually look clean.

Who It’s For

Multi-pet households, anyone who wants a box that blends into modern decor instead of standing out, and cats that do better with a fully closed-in space.

Dimensions	20.5 x 14.75 x 14.38 inches
Material	BPA-free Plastic
Features	Filtered Lid
Color	Grey

What We Found

Amazon Basics keeps this one simple. High sides stop most spraying, the top entry design cuts down on scatter, and a filtered lid handles basic odor control without any extra tech. The top entry design helps more than the price tag suggests it would.

It ships with a scoop that clips onto the side of the box, so you’re not hunting for it in a drawer every morning. The BPA-free plastic is on the thinner side compared to the IRIS boxes, but for the price, it holds up fine under normal use.

Who It’s For

Budget-conscious owners, first-time top entry box buyers who want to test the format before spending more, and anyone with a single, average-sized cat.

Dimensions	20.75 x 16.125 x 14.625 inches
Entry Size	9 x 10.5 inches
Origin	Made in USA
Color	Beige/White

What We Found

This is the roomiest box in the lineup at 20.75 by 16.125 inches, with a 9 by 10.5 inch entry opening, big enough for most cats up to around 18 pounds. The lid has molded grooves that catch stray litter, and a scoop hook on the side keeps your scoop off the floor and within reach.

Tall walls handle spraying and digging well. It also does a decent job keeping dogs out, since the entry sits well above where most dogs can comfortably reach. Made in the USA, if that’s a factor for you.

Who It’s For

Owners of medium to large cats, people who want an organized litter station rather than loose supplies scattered around, and anyone who prefers American-made products.

Dimensions	23.2 x 15.4 x 15 inches
Color	Tan
Feature	Tilting Lid
Specialty	Built-in Tracking Mat

What We Found

So Phresh is the longest box here at 23.2 inches, which matters if your cat likes to stretch out. The lid tilts back instead of lifting straight off, so scooping doesn’t require setting a lid down somewhere. A built-in tracking mat sits right at the exit and brushes granules off paws as your cat steps down.

It’s not fancy. No Microban, no filter, no grooved lid pattern. Just a big enclosed box that does the job at a lower price than the IRIS or Arm & Hammer options.

Who It’s For

Budget shoppers, owners of longer-bodied cats who need extra length, and anyone who just wants a simple box without extra features to maintain.

What to Look For Before Buying

Picking a deep top entry litter box comes down to your cat’s size, age, and habits, plus how much odor and mess you’re trying to solve for. Here’s what actually moves the needle.

Check Entry Size and Wall Height

Measure your cat from nose to tail base and add a few inches. Most top entry boxes fit cats up to 15 to 18 pounds comfortably; anything larger needs an XL model. A cramped opening causes hesitation and, eventually, accidents outside the box. Wall height should sit above your cat’s spray line, usually 12 to 15 inches for an average adult cat.

Value Litter Tracking Features

Textured or grooved lids catch granules on the way out. A built-in mat does the same job from a different angle. Combine either with a heavier clumping litter, since lightweight litter scatters more easily and defeats the purpose of a top entry design.

Rating Odor Control Capabilities

High walls and a lid trap smell far better than open boxes. Some models add a filter or Microban-treated plastic on top of that. None of it replaces scooping daily and a full litter change every one to two weeks, but the extra layer helps between cleanings.

Verify Material, Stability, and Durability

Look for BPA-free, thicker plastic. Thin walls crack under a cat’s weight after a year or two and start holding onto odor sooner. Check buyer reviews for wobbling complaints too. Lighter boxes can tip if a nervous cat jumps in fast, which is often enough to scare a cat off the box for good.

Weight Capacity and Multi-Cat Homes

Most standard top entry boxes handle cats up to 15 pounds without issue; check the listing for anything heavier. If you have more than one cat, plan on one box per cat plus one extra, and know that some cats simply won’t share an enclosed top entry box the way they might a larger open one.

How to Introduce Your Cat to a Top Entry Litter Box

Swapping litter boxes cold turkey is the most common reason cats reject a new one. Give the switch a couple of weeks and follow these steps.

1. Place the new box next to the old one for the first few days, lid off if possible, so your cat can investigate without committing to the climb.
2. Move a handful of used litter from the old box into the new one so the scent is familiar.
3. Once your cat is using the new box with the lid off, add the lid but leave it propped open at first.
4. Close the lid fully only after your cat has entered and exited on their own a few times.
5. Remove the old box once the new one has been used consistently for about a week, not before.

If your cat still avoids the box after two weeks of this, don’t force it. That’s usually a sign the box is too tall, too narrow, or too wobbly for that particular cat, and a front entry box may just be a better fit.

Frequently Asked Questions

Are top entry litter boxes good for all cats?

Not for every cat. They work well for younger, agile cats but often struggle for senior cats, kittens, or anything overweight or arthritic. Watch how your cat handles the climb during the first couple of weeks and switch to a front entry box if they hesitate consistently.

How deep should a top entry litter box be?

Most cats do well with walls between 12 and 15 inches tall, deep enough to contain digging and spraying without making the climb too demanding. Larger or more athletic cats can handle 16 inches or more.

How do I prevent litter tracking?

Choose a box with a textured or grooved lid, add a litter mat outside the exit, and switch to a heavier clumping litter. Lightweight litters scatter more, no matter how good the box design is.

Can these boxes help with odor?

Yes, the enclosed shape alone contains smell better than an open box, and filters or Microban-treated plastic add another layer. None of that replaces daily scooping and a full litter change every one to two weeks.

Will a top entry box keep dogs out?

Usually, yes. Most dogs can’t reach up and into a top entry opening, which keeps them from eating litter or waste. Very tall or determined dogs are the exception.

My box wobbles when my cat jumps in. What’s wrong?

Lighter plastic boxes can rock if a cat lands off-center. Check that all feet are on level ground first. If it still wobbles, adding a rubber mat underneath or a small amount of weight, like a bag of extra litter, near the base usually solves it. A wobble scary enough to spook your cat once can make them avoid the box entirely afterward.

How often should I replace the box?

Once a year is a reasonable rule of thumb. Plastic absorbs odor at a microscopic level over time, even with regular cleaning, and a fresh box helps keep the space smelling clean.

Can multiple cats share one top entry box?

They can, but it’s not ideal. The general guideline is one box per cat plus one spare, and the enclosed, single-entrance design of most top entry boxes can make a waiting cat feel cornered. If you’re running a multi-cat household, mix in at least one open or front entry box as an alternative.

🎯 Final Verdict

The Arm & Hammer Premium Top Entry Litter Box is our top pick. Microban-treated plastic keeps odor from building up in the material itself, and the wide opening works for most cat sizes. If budget matters more than extra features, Amazon Basics gets the fundamentals right for a lot less money.

Before you buy anything, though, check that your cat can actually manage the climb. A great box your cat won’t use isn’t a great box. Measure the entry size against your cat, watch for wobbling in the reviews, and pick the one that matches how your household actually lives, not just the highest score on this list.