How Much Money Can a Bidet Really Save UK Households?
By James Hargreaves · Updated June 2026 · 7 min read
- A typical UK family spends £500–£700 a year on toilet paper alone
- A basic bidet attachment costs under £50 and can pay for itself within months
- The extra water used by a bidet adds roughly £2–£3 a year to your water bill — far less than what you save on paper
- Most attachments and handheld sprayers are simple enough to fit yourself in 15–30 minutes
Why Your Bathroom Is Costing You More Than You Think
Most UK households don't realise how much money literally goes down the drain every day. Between toilet flushing, showering, and the hidden cost of toilet paper, the average bathroom is one of the most resource-intensive rooms in your home. UK households use somewhere in the region of 140–150 litres of water per person per day, according to Environment Agency estimates — and a surprising chunk of that is linked to how we clean ourselves after using the toilet.
Here's the hidden expense: toilet paper isn't just a recurring cost at the supermarket. Its production consumes meaningful amounts of water, energy, and trees. That £3 pack of 12 rolls has a much bigger environmental and financial footprint than the price tag suggests. By switching to a water-saving bidet, you can cut out most of that expense while also reducing the strain on your plumbing. It's a rare combination: better for your wallet and better for the planet.
How Water-Saving Bidets Work (and Why They're Efficient)
A water-saving bidet uses a precise, low-volume stream of water — typically around half a litre per use — to clean effectively. That's dramatically less than the 6 to 10 litres of water used by a single toilet flush. Toilet paper production is also water-intensive at an industrial scale, which is one more reason the lifetime water footprint of a bidet compares so favourably.
Modern attachments and handheld sprayers are designed to minimise waste. Many feature adjustable pressure controls so you use only what you need. Some electric models include automatic shut-off sensors that stop the flow after a few seconds. The key point: a bidet doesn't replace the toilet — it replaces the paper. You still flush, but you no longer flush paper, which also reduces the risk of blockages and sewer issues.
If you're not sure how much pressure you'll want, look for a model with an adjustable nozzle or dial rather than a fixed single-pressure attachment. It costs little extra and means you won't need to buy a second unit later.
Real Savings: What a UK Household Can Expect
Let's talk numbers — realistic ones. A typical UK household of four spends between £120 and £180 per person per year on toilet paper. That's roughly £500–£700 annually for a family. Meanwhile, a basic non-electric bidet attachment starts from under £50, while a more comfortable electric seat with warm water typically costs between £200 and £400. Handheld sprayers are even cheaper, often under £30.
So what's the payback period? If you spend £250 on a decent electric bidet seat, you'll save that amount in toilet paper alone within 6 to 12 months, depending on your usage. As for your water bill: at roughly 0.5 litres per use and five uses a day, you're looking at under 1,000 litres a year — about £2–£3 added to a typical UK water bill. That's a small trade-off against several hundred pounds saved on paper. The Which? review of bidets confirms that even basic models offer meaningful long-term savings.
Over five years, the cumulative saving easily exceeds £500 for an average family. And that's without factoring in reduced plumbing call-outs from fewer blockages.
Installation: Simple Enough for Most UK Bathrooms
Many people assume fitting a bidet requires a plumber and major disruption. In reality, most bidet attachments and handheld sprayers are designed for DIY installation. You simply connect a T-valve to the toilet's water supply line (the pipe behind the toilet) and attach the sprayer or seat. The process takes 15–30 minutes and uses only basic tools like an adjustable spanner.
For electric bidet seats, you'll need a nearby power outlet. If you don't have one, a qualified electrician can add one for around £100–£150 — still a worthwhile investment given the long-term savings. Always check that your model complies with UK water regulations; reputable products will state this clearly. You can find more details on approved fittings from the Water Regulations Advisory Scheme (WRAS).
Bidet vs. Toilet Paper: The Clear Winner on Cost
Toilet paper is a single-use product that you buy again and again. A bidet is a one-time purchase that lasts for years. When you compare the lifetime cost, the bidet wins by a wide margin — and that's before factoring in the reduced strain on your plumbing from no longer flushing paper.
There's also the hygiene angle — but focusing purely on cost, the maths is simple. Even if you still use a small amount of toilet paper for drying (say, a few sheets per use), your consumption drops by 90% or more. That's an immediate, visible reduction in your shopping bill and bin waste.
Addressing the Most Common Worries
"Won't a bidet increase my water bill?" — Barely. At 0.5 litres per use, even with five uses a day, you're looking at less than 1,000 litres per year — around £2–£3 on a typical UK water bill. You'll save far more on toilet paper.
"Is it difficult to clean?" — Most bidet nozzles are self-cleaning or pop out for easy wiping. A quick spray of bathroom cleaner once a week keeps everything hygienic.
"I rent my home — can I still install one?" — Yes. Non-electric attachments and handheld sprayers fit onto existing plumbing and can be removed without leaving any trace. Just keep the original parts to reinstall when you move out.
"Do I need a separate hot water supply?" — Only if you want warm water. Many UK users are fine with cold water. For electric seats, they heat water internally without needing a hot pipe.
Future Trends: Why Bidets Will Become Standard in UK Bathrooms
With water bills rising and environmental awareness growing, water-saving bathroom tech is gaining momentum. There aren't yet direct subsidies for bidets in the UK, but some local water companies offer free water-saving devices for the home, and it's reasonable to expect broader incentives in the coming years as pressure on water supplies increases.
The toilet paper shortages during the pandemic made many UK households rethink their reliance on paper rolls. Once people try a bidet, the vast majority never go back. It's cleaner, cheaper, and more comfortable — a rare upgrade that pays for itself.
Ready to Start Saving?
You don't need a luxury bathroom or professional installation. Start with a simple handheld sprayer for under £30 and try it for a month. Track how much less toilet paper you buy — the difference shows up fast, both in your shopping basket and your bin.