Nobody starts planning a campervan build excited about the toilet. It’s the least glamorous decision you’ll make, and it’s also one of the ones people get most wrong — usually by installing something bulky they end up hating, or by skipping it entirely and regretting it at 3am on a remote mountain pass. The good news is that once you understand the four realistic options, the right choice for your setup becomes obvious pretty fast.
Toilet choice affects your running costs too — cassette chemicals, composting medium, or the paid campsites you’ll rely on without one. Work it into your numbers with VanCalc’s free budget calculator.
Option 1: Portable Cassette Toilet
This is what most campervan owners end up with, and for good reason — it’s cheap, compact, and it just works. A cassette toilet is a self-contained unit with a fresh water flush tank on top and a sealed waste tank below that you slide out and empty.
The Thetford Porta Potti (~$110) is the default choice in the van life world. It’s about the size of a small cooler, so it slides under a bench or into a cupboard when not in use.
Emptying: every 3–5 days for one person, more often for two. You need a chemical disposal point — campsites, service stations, marinas and motorhome aires all have them. In Europe these are everywhere; in the US they’re at RV dumps and some campgrounds.
Pros: Cheap, compact, no installation, widely understood.
Cons: You have to carry waste to a disposal point, chemicals are an ongoing cost, and emptying is exactly as pleasant as it sounds.
Option 2: Composting Toilet
The premium option, and the one that’s taken over serious full-time van builds in the last few years. A composting toilet separates liquid from solid waste — that separation is the whole trick, because it’s the mixing of the two that creates the smell everyone associates with camping toilets.
Solids go into a chamber with a composting medium (coconut coir or peat moss) and get stirred with a handle. Liquids go into a separate bottle at the front.
Units like the Separett or Nature’s Head style composting toilets (~$500–$1,000) are the common picks. They’re a real investment, but full-timers who switch rarely go back.
Emptying: the liquid bottle every 1–2 days (this can go down a normal toilet). The solids chamber every 3–4 weeks for one person — and by then it genuinely looks and smells like soil, not waste.
Pros: Almost no smell, no chemicals, very infrequent solid emptying, no need to find a chemical disposal point.
Cons: Expensive, physically bulky, and you need to keep composting medium stocked.
Option 3: Bucket Toilet (DIY)
The budget version of a composting toilet, and much better than it sounds. A sturdy bucket, a proper toilet seat lid, compostable bags, and sawdust or coir to cover after each use. Total cost: under $50.
A bucket toilet seat kit (~$30) turns any 5-gallon bucket into a functional setup. Plenty of long-term van lifers use exactly this and see no reason to upgrade.
The key is covering waste completely after each use — that’s what controls odour. Bag it, seal it, bin it.
Pros: Extremely cheap, no plumbing, no chemicals, easy to replace.
Cons: Frequent bagging and binning, looks basic, less pleasant for guests.
Option 4: No Toilet at All
A genuinely valid choice, and more common than you’d expect — especially in smaller vans where every cubic foot counts. The strategy is to rely on public facilities: campsites, service stations, supermarkets, cafes, gyms, and public toilets.
Most people who go this route still keep an emergency backup — a bucket, a folding toilet, or a pee bottle for the middle of the night. Because eventually there’s a night where nothing is open.
Pros: Zero space used, zero cost, nothing to empty.
Cons: You’re dependent on facilities being available and open, which limits remote camping. Genuinely stressful when it’s 2am and you’re an hour from anywhere.
Quick Comparison
| Option | Cost | Space | Emptying | Best for |
|---|---|---|---|---|
| Cassette | $90–$150 | Small | Every 3–5 days | Most people |
| Composting | $500–$1,000 | Medium/large | Solids every 3–4 weeks | Full-timers, off-grid |
| Bucket DIY | $30–$50 | Small | Every 1–2 days | Budget builds |
| No toilet | $0 | None | N/A | Small vans, city-based |
Controlling Smell (The Thing Everyone Worries About)
A well-managed campervan toilet does not smell. The rules are the same regardless of which type you choose:
- Separate liquids from solids where possible — this is the single biggest factor
- Cover solids immediately with coir, sawdust or a sealed bag
- Ventilate — a roof fan (~$159) moving air through the van handles a lot on its own
- Empty the liquid container often — stale urine is the main smell culprit in every system
- Keep the seal clean on cassette units — a dirty seal leaks odour even when everything else is fine
Where to Empty (Legally)
This matters, and getting it wrong is both antisocial and in many places illegal.
- Cassette waste — chemical disposal points at campsites, motorhome aires, service stations and marinas. Never in a normal drain, storm drain or on the ground.
- Composting solids — sealed bag into general waste, or a home compost setup if you have one. Not into nature.
- Liquids — any normal toilet. Diluted and poured away from water sources at a push, but a toilet is always better.
- Bagged bucket waste — sealed compostable bag into general waste bins.
Apps like Park4Night mark service points across Europe, which makes finding disposal easy on the road. In the US, sanidumps and RV parks cover the same job.
Recommended Gear
- Thetford Porta Potti (~$110) — the default cassette toilet for van life, compact and reliable
- Composting toilet (~$500+) — the long-term upgrade for full-timers
- Bucket toilet seat kit (~$30) — turns a bucket into a working setup for almost nothing
- Coconut coir (~$20) — the composting medium that keeps everything odour-free
- Maxxair roof fan (~$159) — ventilation does more for smell control than any product
The Bottom Line
For most people, a cassette toilet is the right answer — cheap, compact, and it does the job without complicating your build. If you’re living in the van full-time and camping off-grid a lot, a composting toilet is worth the money and the space. If you’re on a tight budget, the bucket setup genuinely works. And if you have a small van and stick to areas with facilities, going without is a legitimate choice as long as you keep an emergency backup.
Whatever you pick, ventilation and disciplined emptying matter more than the unit itself. Get those right and it’s a non-issue.
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Related reads: How to Shower in a Van · Van Conversion Cost Breakdown · Van Life for Beginners
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