TOTO Washlet Reviews: C5 vs S5 vs S7A (2026)

TOTO invented the modern washlet, and the brand is still the default recommendation in this category. But TOTO's own lineup is genuinely confusing. The model names are letters and numbers, the feature lists overlap heavily, and the prices run from about $624 to $1,404 for seats that, at a glance, appear to do the same thing.

This page is our hub for all three current Washlet seats: the C5, the S5, and the S7A. We have reviewed each one individually, and here we put them side by side to answer the two questions people actually ask. Is a washlet worth it at all, and if so, which one.

Is a Washlet Worth It?

Short answer: yes, if you will use it daily and you have a GFCI outlet near your toilet.

The case for is straightforward. You buy it once, and TOTO seats use no replaceable filters or cartridges at all, so the ongoing cost is only electricity, roughly $3 to $5 per month. Most owners cut toilet paper use substantially. The heated seat and warm air dryer are the features people quietly become most attached to, especially in winter.

The case against is also real, and it is almost always about installation, not the seat. Every Washlet is an electric seat that needs a GFCI outlet within about four feet of the toilet. Most bathrooms do not have one. Adding it runs $150 to $300 for an electrician, which can raise the true cost of a $682 seat to nearly $1,000.

So the honest answer is conditional. If you own your home, have or can add the outlet, and will use it every day, a Washlet is one of the better-value fixture upgrades you can make. If you are renting short term or the outlet situation is difficult, start with a cold-water attachment instead. We break that decision down further in our guide to whether bidets are worth it.

TOTO Washlet Comparison: C5 vs S5 vs S7A

Prices verified September 2026 against TOTO USA list pricing and authorized retailers. Street prices move; check before you buy.

The Features-Per-Dollar Ladder

Spec tables tell you what each seat has. They do not tell you whether the extra money buys anything. So we did something we have not seen anyone else do with this lineup.

We built a 17-point checklist of every meaningful feature across the three seats, covering wash functions, comfort, hygiene tech, and automation. Then we scored each model and divided its verified street price by the features it actually delivers.

The S5 is the most efficient seat in TOTO's lineup on this measure, and it is not close.

The more useful number, though, is what each step up costs. This is where the lineup's logic becomes obvious:

Both steps add exactly three features. One costs $19 per feature, the other costs $241, roughly twelve times more.

That single comparison is the whole buying decision. Moving from the C5 to the S5 is close to free given what you get: endless warm water instead of a 60-second tank, plus a nightlight and four-user presets. Moving from the S5 to the S7A buys an auto open and close lid, EWATER+ in the bowl, and a thinner profile. Those are genuine luxuries, and some people will happily pay for them, but nobody should mistake them for necessities.

One caveat on the method: features are counted, not weighted. Endless warm water matters far more day to day than a nightlight. That actually strengthens the conclusion, because two of the S5's three added features are the heavily weighted ones.

Best for Most People: TOTO Washlet S5

Best for: anyone buying their first Washlet, households with multiple users, and anyone with a round toilet bowl.

At around $682 against a $974 TOTO list price, the S5 is the least expensive Washlet with an instant water heater, and that is the reason to buy it. Instead of warming a small reservoir that runs cold partway through, it heats water on demand and keeps going as long as you need. There is no cold surprise at the end of a wash, and no waiting for a tank to recover between two people using the bathroom back to back.

The wireless remote stores presets for up to four users, so each person saves their own water temperature, seat temperature, pressure, and wand position. Combined with endless warm water, that makes the S5 the clear choice for a family bathroom.

It is also the only one of the three available in both elongated (SW3446) and round (SW3445) versions, which quietly matters, since round bowls are common in older and smaller bathrooms and most premium seats ignore them.

You get everything that makes a TOTO a TOTO: PREMIST wets the bowl the moment you sit, EWATER+ sanitizes the wand before and after every use, and the catalytic deodorizer and heated SoftClose seat run with no cartridges to replace. Power draw is 1,271W during active washing, which sounds high next to the C5's 403W, but the instant heater only draws power while warm water is actually running.

What you give up: the auto open and close lid, and EWATER+ bowl cleaning. Both live on the S7A.

Read the full TOTO Washlet S5 review for spray volumes, installation detail, and how it compares against non-TOTO seats in the same price band.

Best Premium Pick: TOTO Washlet S7A

Best for: buyers who want the lid to operate hands-free, and anyone who wants a seat that looks built-in rather than added on.

The S7A is TOTO's flagship seat, and its two signature features are things you notice immediately rather than things you read on a spec sheet.

The first is the auto open and close lid. An approach sensor raises the lid as you walk up and closes it when you leave, so the only thing you touch in the entire sequence is the remote. The second is the 4.06-inch ultra-slim profile. Most bidet seats sit visibly on top of the toilet and announce themselves. The S7A largely disappears into the fixture, which is why it turns up in renovations where the bathroom design actually matters.

It also extends EWATER+ from the wand to the bowl itself, applying electrolyzed water to the ceramic as well. Combined with PREMIST, that is the most complete hands-off hygiene package TOTO offers, and it still requires no filters or chemicals.

The honest catch is the price. At about $1,404 street against a $2,005 list, the S7A costs more than double the S5 while sharing its entire wash and comfort core: same instant endless warm water, same five-setting heated seat and dryer, same deodorizer, same four-user remote. You are paying roughly $722 for automation and industrial design.

We rate it 4.8, our highest score of the three, and we still do not recommend it to most buyers. Those two facts are not in conflict. It is the better seat; it is the worse value. Buy it if the lid and the profile are things you genuinely want, not because it sits at the top of the range.

The TOTO Washlet S7A review covers the Classic and Contemporary lid variants and the auto-flush compatibility in detail.

Best Only at Closeout: TOTO Washlet C5

Best for: bargain hunters who find genuine clearance stock near or below $500, and older bathrooms on weak circuits.

TOTO discontinued the C5 in December 2025 and named the S5 as its replacement, but stock is still moving through authorized retailers, so it remains a live option for now.

The hardware is good. It has the full TOTO core: warm water rear, soft rear, and front cleansing with oscillating and pulsating options, a five-setting heated seat, a warm air dryer, a catalytic deodorizer, PREMIST, EWATER+ wand cleaning, and a SoftClose lid, all with no filters to replace. There is one genuine advantage over its successors: a 403W draw, less than a third of the S5's, which is easier on the older bathroom circuits common in pre-1980s homes.

The problem is arithmetic. Remaining C5 stock runs about $624 to $717, and the current S5 sells for roughly $682. At those prices you are paying nearly the same money for a seat with a tank heater that delivers 30 to 60 seconds of warm water, no nightlight, no four-user memory, elongated fit only, and no ongoing production behind it.

So the C5 is worth buying at one price and one price only. If you find real clearance stock near or below $500, it is a lot of TOTO for the money. At $624 or above, buy the S5 and do not think about it again.

Our full TOTO Washlet C5 review walks through the closeout math and what discontinuation means for parts and service.

What Every TOTO Washlet Shares

Whichever you choose, a few things are constant across the lineup, and they are a large part of why the brand is worth the premium.

No consumables, ever

None of these seats uses a replaceable water filter or a carbon deodorizer cartridge. The catalytic deodorizer regenerates itself. Many competing electric seats run $25 to $40 a year in filters, so over a five-year life that gap is $125 to $200 in TOTO's favor, which narrows the sticker-price difference more than most buyers expect.

PREMIST and EWATER+

PREMIST mists the bowl as you sit, so waste struggles to adhere to wet ceramic and flushes away more cleanly, using very little water. EWATER+ is electrolyzed water, plain tap water given a mild electric charge to make it a chemical-free sanitizing rinse for the wand before and after each use. Both are automatic and need nothing from you. If you want the background on why this matters, see our explainer on whether bidets are sanitary.

The same wash core

All three offer a rear cleanse, a softer rear spray, and a front cleanse, each with oscillating and pulsating modes, plus five-level adjustment of water temperature, seat temperature, and dryer heat. The wash experience itself is more similar across these three seats than the price spread suggests. What changes is how long the warm water lasts and how much the seat does on its own.

The same installation requirements

Each seat installs in roughly 15 to 30 minutes on a compatible bowl using the included T-valve, and each needs a GFCI outlet within about four feet. Our bidet seat installation guide covers the full process, and if your bathroom has no outlet near the toilet, read our guide on installing a bidet without an outlet before you commit to an electric seat.

The Verdict

Buy the TOTO Washlet S5 at around $682. It is the cheapest way into TOTO's instant endless warm water, it fits round and elongated bowls, it remembers four users, and our features-per-dollar analysis puts it at $48.71 per feature, the most efficient seat TOTO makes.

Buy the TOTO Washlet S7A at around $1,404 only if the auto open and close lid or the ultra-slim profile are things you actively want. It is the best seat of the three, and it costs about $241 per added feature to get there.

Buy the TOTO Washlet C5 only below $500. Above that, its own replacement is the better purchase.

If you want to see how TOTO stacks up against Brondell, BioBidet, and others before committing to the brand, our guide to the best electric bidet seats compares across manufacturers, and our roundup of the best bidet seats covers cold-water options if a Washlet turns out to be more seat than you need.