Buying guide · Self-cleaning litter boxes
What a Litter-Robot really costs to run
The sticker price is the part everyone compares. It is also the part that matters least after the first year. Filters, drawer liners and standby power keep running long after the box arrives — and they do not cost the same on every model.
Below is the full cost of ownership for every Litter-Robot currently sold new, over one, three or five years. Every figure comes from a source we name and a date we show. Nothing is estimated unless we say so on the line itself.
How long do you plan to keep it?
How many cats?
Over 3 years · 1 cat
Running cost — filter, liner, power — is a month on every model here, at 1 cat. It does not change with the horizon you pick above; only the purchase price does.
Total cost, cheapest first
The part you buy again, and again
Whichever model you pick, these two are the same, and they are what the running cost above is made of. Whisker sells both directly — those links earn us nothing. The cheaper alternative underneath each one does, and it is the one we already document in our own guides.
Already own a Litter-Robot 3?
Then your question is not which model to buy, it is whether to keep fixing the one you have. Whisker no longer sells the 3 but still sells every part for it. Tick what has failed — several, if it has been that kind of year — and see the repair bill next to the price of moving on.
What has gone wrong on yours?
Litter-Robot 3 part prices read by hand from Whisker's own parts page on 26 August 2026. Consumables are deliberately left out of this comparison: a drawer liner and a carbon filter run on both machines, so they add the same amount to each side and change nothing. For the full ladder of parts and the three cases where repairing stops making sense, see what a Litter-Robot 3 repair actually costs.
Against a plain manual box
Manual litter box and scoop
IRIS USA large box with scatter shield, scoop included
$22.99
This is where most buying guides produce a payback figure, and where we will not. A manual box costs twenty-three dollars once. A self-cleaning box costs six hundred to a thousand, plus liners and filters forever. No self-cleaning litter box ever pays for itself in money. Any site telling you otherwise has inflated something.
What it buys is the scooping. Over the period you selected, the cheapest model that suits your household costs a month more than the manual box. That is the real question in front of you: work out how many minutes a day you currently spend on litter, and that monthly figure tells you exactly what those minutes are being priced at. For some households it is an easy yes. For others it is not, and that is a perfectly reasonable conclusion to reach on a page like this one.
Odour control, litter tracking and health tracking are real differences between these machines too. They are not costs, so they are not on this page — the bulletins linked at the bottom cover them.
How we calculate this
What is counted, and what is not ↓
Counted: purchase price, every consumable the manufacturer treats as a replaceable part, and standby electricity.
Not counted: cat litter and waste bags. Both a Litter-Robot and a manual box need them, in broadly similar quantities, so including them would add the same number to every column and change no ranking. It does mean the manual box shows no running cost at all here, which flatters it slightly.
Not counted: your time. See the section above — we would rather hand you that arithmetic than make an assumption about what your hour is worth.
Assumptions we had to make ↓
The one-cat figure is sourced. The multi-cat ones are not. Whisker's maintenance guidance is that one liner change a week is usually enough for one cat, and that is the figure this page has always used. For two or more cats no manufacturer publishes a consumable figure at all, so those lines carry an estimate badge.
How the estimate is built. Whisker's own maintenance page publishes a table that doubles the emptying rhythm with each additional cat — every two weeks, then weekly, then twice weekly. We apply that doubling to our one-cat rate. We deliberately do not copy the table's absolute numbers, because they contradict the opening paragraph of the same page: the table's "2 cats" rate is the one the paragraph gives for a single cat. Rather than pick a side in Whisker's disagreement with itself, we keep the sourced one-cat figure we already publish and scale from there.
The carbon filter does not scale. No source ties filter life to the number of cats — Whisker gives a flat two-to-four week interval regardless of household. So the filter line is identical at every setting, and only the liner moves.
Cats per model. Whisker rates the EVO for up to two cats, the Litter-Robot 4 for up to four and the Litter-Robot 5 for up to five. Where a model is over its rated capacity for the household you picked, the page says so on the card and does not put it forward as the answer, however cheap it is. Whisker publishes no figure for the 5 Pro, so we claim none.
Consumable packs. Prices use the most commonly sold pack, not the bulk pack. Buying liners a hundred at a time roughly halves that line — worth knowing, but it is not what most people do on day one.
Electricity at $0.17 per kWh. A US residential average, not a Whisker figure. The Litter-Robot draws 2.7 W while cycling and 0.36 W the rest of the time, which works out to roughly five cents a month. It is a rounding error next to the liners, and it is here for completeness rather than because it changes anything.
Same filter, same cadence, across the line. Whisker's own care guides for the 4, the 5/Pro and the EVO all give the identical instruction — replace the carbon filter about once a month under normal use — and sell one filter compatible with all three. So it costs the same on every model here, and the ranking below tracks purchase price alone.
Where the prices come from ↓
Every price on this page was read by hand from the seller's own page and stamped with the date it was read. Nothing is scraped and nothing is fed by a live price feed.
Any figure older than sixty days carries a verify badge until it is checked again. If you see one, treat that line as indicative and click through for the live number.
Some links on this page earn us a commission at no cost to you. Litter-Robot 5 links go directly to Whisker and earn us nothing — it is here because it belongs in the comparison, not because it pays. Full detail on our disclosure page.
Before you decide
Cost is one input. These are the failures owners actually run into, written up from manufacturer documentation and owner reports.