How to Reduce Your Water Bill (and Why It Matters)

When people talk about cutting household bills, water rarely gets a mention. It's all about energy prices, broadband deals, and insurance renewals. But the average UK household spends around £400–£450 a year on water and sewerage — and unlike energy, most people have never even tried to reduce it. That's a mistake, because there's real money to be saved here.

Whether you're on a water meter or paying a fixed rate, there are practical steps you can take to lower your bill. Some are obvious, some are surprisingly easy, and a few could save you hundreds of pounds a year. Let's dive in.

Metered vs Unmetered: Which Are You?

First things first — check whether you're on a water meter or an unmetered (rateable value) supply. If you're unmetered, your bill is based on your property's rateable value, which was set decades ago and has nothing to do with how much water you actually use. If you're metered, you pay for what you use.

Here's the key insight: if you use less water than the average household for your property size, switching to a meter will save you money. As a rough guide, if there are fewer people in your home than bedrooms, a meter will almost certainly be cheaper. You can request a free water meter from your supplier — they're legally required to install one if you ask.

The Free Meter Switch

Requesting a water meter is free, and most water companies will install one within a few weeks. Once it's fitted, you have a trial period (usually 12–24 months depending on your supplier) during which you can switch back to your old unmetered charges if you're not saving money. There's genuinely no risk.

According to the Consumer Council for Water, around a third of households could save money by switching to a meter. If you live alone or as a couple in a three-bed house, the savings can be £100–£200 per year. That's worth a phone call.

Fix Your Leaks (Yes, Really)

A dripping tap might seem trivial, but it can waste over 5,000 litres of water a year. A running toilet cistern is even worse — potentially wasting 200–400 litres per day. If you're on a meter, that's money literally going down the drain.

Check your taps, toilets, and any visible pipes for drips or leaks. A simple test for toilet leaks: put a few drops of food colouring in the cistern, wait 15 minutes without flushing, and check if the colour appears in the bowl. If it does, your flapper valve needs replacing — a £5 fix that could save you £100+ a year.

Shower Smarter

The average UK shower uses about 12 litres per minute with a standard showerhead. A 10-minute shower uses 120 litres — almost as much as a bath. Cutting your shower time from 10 minutes to 5 saves 60 litres per shower. For a family of four, that's 240 litres a day, or nearly 88,000 litres a year.

Fitting a water-efficient showerhead (around £15–£30) can reduce flow to 6–8 litres per minute without noticeably affecting pressure. Many water companies offer free water-saving devices through their websites — showerheads, tap inserts, and cistern displacement bags. Check yours before buying anything.

Be Smarter With Appliances

Your washing machine uses around 50 litres per cycle, and your dishwasher about 10–15 litres. Running these appliances only when full is the simplest way to reduce consumption. Using the eco setting on your dishwasher typically uses less water and energy than washing by hand — so don't feel guilty about loading it up.

When it's time to replace an appliance, check its water efficiency rating. Modern washing machines can use as little as 40 litres per cycle compared to 80+ litres for older models. The savings compound over hundreds of cycles per year.

The Garden Hose Trap

A garden hose uses about 1,000 litres per hour. That's not a typo. Watering your garden with a hose for just 30 minutes uses 500 litres — more than a week's worth of drinking water for a family. If you're on a meter, those summer watering sessions are silently inflating your bill.

Use a watering can instead, collect rainwater in a water butt (they cost £20–£50 and can collect hundreds of litres), and water plants in the early morning or evening when less evaporates. Your garden won't notice the difference, but your bill will.

Apply for WaterSure

If you're on a water meter and either receive certain benefits or have a medical condition requiring extra water use, you might qualify for the WaterSure tariff. This caps your bill at the average for your area, regardless of how much water you use. It's a safety net that many eligible households don't know about.

Families with three or more children under 19 living at home and receiving qualifying benefits are also eligible. Contact your water company to check — it could save you a significant amount if your usage is above average for unavoidable reasons.

Check for Social Tariffs

Most water companies now offer social tariffs for customers on low incomes or in financial hardship. These can reduce your bill by up to 50%. Each company has different eligibility criteria and names for their schemes (for example, Thames Water's is called 'WaterHelp'), so check your provider's website or call them directly.

There's no shame in asking for help with bills. These schemes exist specifically for this purpose, and they're funded by a tiny amount added to other customers' bills. If you're struggling, apply. The worst that can happen is they say no.

Small Habits, Big Impact

Turn the tap off while brushing your teeth — that saves 6 litres per minute. Use a washing-up bowl instead of running the tap continuously. Keep a jug of water in the fridge instead of running the tap until it's cold. Fill the kettle with only as much water as you need. None of these are life-changing individually, but together they add up to thousands of litres per year.

Put Your Savings to Work

Here's the real point: every pound you save on water is a pound you can redirect towards your actual financial goals. Set up SYM to automatically sweep your bill savings into a dedicated pot — whether that's an emergency fund, a holiday, or a house deposit. The money you save on utilities shouldn't just vanish into general spending. Give it a purpose, and it'll work harder for you.

The Bottom Line

Your water bill isn't the biggest household expense, but it's one of the easiest to reduce. Switch to a meter if it makes sense, fix leaks, shower shorter, use appliances efficiently, and claim any discounts you're entitled to. A few simple changes could save you £100–£300 a year — and that money is better off in your savings account than disappearing down the plughole.