How to cut your water bill
You can't switch supplier, but you can still pay less. Every option explained.
The average water bill is rising to around £603 per year in 2025/26. You can't switch supplier, but you can cut costs by getting a meter (saves most small households £100+ per year), claiming social tariffs if on benefits, checking for leaks, and applying for the WaterSure cap if you have a medical condition or large family.
Can't switch. Can't compare. Your water company is whoever serves your postcode. But you can still pay less.
Why Water Bills Are Rising So Sharply in 2025/26
If your water bill shock you this year, you're not alone. Water bills are rising faster than almost any other domestic bill, and the increases are significant, many households face rises of 10-15% in 2025/26, with some regions even higher. The average bill is now around £603 annually, and it's climbing steeply. Understanding why this is happening helps explain why bills won't be coming down any time soon.
Water companies are investing heavily in infrastructure. England's water infrastructure is ageing, much of it dates from the Victorian era. Pipes leak, sewers back up, and water shortages loom as climate change makes droughts more frequent. The Government's water companies are mandated to invest in upgrades: fixing leaks in the distribution network, upgrading sewage treatment facilities to handle climate extremes, and building resilience against shortages. These are expensive projects, and water companies are passing the cost to customers. Ofwat (the water regulator) approved price increases of up to 50% for some companies in the 2025-2030 price review period, far exceeding inflation.
Sewage treatment is particularly expensive. Modern treatment plants must remove pollutants (especially nitrogen and phosphorus) to protect rivers and coastal areas. This is now a legal requirement under environmental legislation, and it doesn't come cheap. Some water companies are also dealing with legacy issues, Thames Water, for example, has issued profit warnings and faced questions about dividends and management. These company-specific issues drive higher bills in some regions.
How Water Bills Differ From Other Utilities
Water is unique among domestic utilities for several reasons, and these differences matter when you're thinking about your options:
No switching. With energy or broadband, you can shop around and move to a cheaper supplier. With water, your company is determined by geography. If you live in the Thames Water area, Thames Water is your only option. There's no competition, no switching, and no price comparison. This monopoly is the trade-off for universal service, water is a necessity of life, and the Government ensures everyone has access regardless of cost.
Regional variation. Water prices vary hugely by region. The South East (Thames Water) and South West (South West Water) have the highest bills, partly because they're in water-stressed areas requiring expensive investments. The North and Midlands are cheaper because they have more abundant water and less stressful geology. You have zero control over this, it's determined by your postcode.
Cross-subsidies. Unlike energy, where the unit rate is more or less transparent, water bills include embedded cross-subsidies. Rural customers cost more to serve (longer pipe networks, fewer people to spread the cost), but they don't pay proportionally more. Urban customers effectively subsidise rural service. Business customers subsidise domestic customers. This built-in fairness (ensuring everyone can afford water) means your bill is not purely based on your consumption or cost to serve.
Get a Meter
Biggest saving for most households. Fewer people than bedrooms? Meter saves money.
| Household | Typical Saving With Meter |
|---|---|
| 1 person | £100-£200 per year |
| 2 people | £50-£150 per year |
| 3 people | £0-£50 per year |
| 4+ people | May cost more |
Process: Request (free). Installed within months. 12-month trial. If it costs more, switch back.
Rule: Fewer people than bedrooms = meter saves.
Social Tariffs
Every company offers reduced rates. Not widely advertised:
| Company | Scheme Name | Typical Discount |
|---|---|---|
| Thames Water | WaterHelp | Up to 50% off |
| Severn Trent | Big Difference Scheme | Up to 90% off |
| United Utilities | Help to Pay | Up to 80% off |
| Anglian Water | LITE | Capped bill |
| Yorkshire Water | WaterSupport | Reduced bill |
| Southern Water | Essentials | Reduced bill |
Who qualifies: Income below £16k-£20k. Some need benefits, others just assess income.
Take-up is low. Most eligible don't claim. Struggling? Check your company's website.
WaterSure (Capped Bills)
WaterSure caps your metered bill at the average for your area. You qualify if you have a meter AND a medical condition requiring extra water use or three or more children under 19 at home, AND you or your partner receive a qualifying benefit.
Apply through your water company. You'll need a doctor's letter for medical conditions.
Check for Leaks
A leak between the meter and your home means you're paying for water you never use. Signs include: bill suddenly much higher, meter spinning when no water is being used, damp patches in the garden, sound of running water when taps are off.
How to check: Turn off all water in the house. Read the meter. Wait 30 minutes. Read it again. If it's moved, you have a leak.
Your water company is responsible for the supply pipe up to the boundary of your property. Many companies offer free or subsidised leak repairs, and most will reduce your bill if a leak inflated it.
Free Water-Saving Devices
| Device | What It Does | Saving |
|---|---|---|
| Shower timer | Encourages shorter showers | £20-£40 per year |
| Tap aerators | Reduce flow without losing pressure | £10-£20 per year |
| Cistern displacement device | Uses less water per flush | £5-£10 per year |
| Garden water butt | Collects rainwater for garden use | Varies |
Order from your water company's website. Usually completely free including delivery.
Surface Water Drainage Rebate
Part of your bill pays for rainwater drainage from your property into the public sewer. If your property handles all its own rainwater (soakaway, water butt, permeable driveway), you may qualify for a reduction of £20-£60 per year.
Payment Plans
If you can't pay, water companies must offer help. Unlike energy, they legally cannot disconnect your water supply for non-payment. Options include payment plans, matching payments, write-off of debt in hardship cases, and breathing space. Contact your company before you fall behind.
Quick Summary
| Action | Who Benefits | Typical Saving |
|---|---|---|
| Get a meter | Small households (1-2 people) | £100-£200 per year |
| Social tariff | Low income households | 50-90% off bill |
| WaterSure cap | Medical conditions / large families on benefits | Varies (can be hundreds) |
| Fix leaks | Anyone with a leak | Stops wasted spend |
| Free devices | Metered customers especially | £30-£60 per year |
| Surface water rebate | Properties with own drainage | £20-£60 per year |
Start with the meter and social tariff checks. Those are where the real money is.
Why Water Bills Are Going Up: The 2025-2030 Period
To understand where water bills are heading, you need to know about the 2025-2030 price review period. Every five years, Ofwat (the water regulator) sets the framework that water companies work within. It approves how much revenue each company can collect, which directly determines bills. The 2025-2030 period was approved in late 2024, and the increases are significant.
Ofwat allowed most companies increases well above inflation, ranging from around 18-50% over the five years depending on the company. Thames Water got 40%, South West Water got nearly 35%, Severn Trent got 24%. These are not one-off increases; they're compounding annual increases over five years. A company with a 35% increase spread over five years might go up roughly 6% each year on top of inflation.
Why so high? The regulator says these increases are necessary to fund the £84 billion of investment the water industry needs to fix aging pipes (England loses around 5.5 billion litres of water daily to leaks), upgrade sewage treatment, improve environmental standards, and build climate resilience. Water companies argue they need to upgrade infrastructure that's decades old. Environmental groups argue water companies have wasted money on dividends and management bloat. The truth is probably a mix of both.
The practical implication: water bills will keep rising significantly for the next few years. The one-off shock of the 2025-2030 price review isn't the end; the increases will compound annually. This is different from energy, where prices eventually stabilise. Water is essentially a structural increase in your cost of living unless you can reduce consumption (meter) or qualify for help (social tariff).
What To Do If You Can't Pay
Water is a necessity, and water companies have a legal duty to help customers in genuine hardship. If your water bill is unaffordable, you have options, and they're stronger than you might think.
Water Companies Cannot Disconnect You
This is the critical difference between water and other utilities. Your electricity or gas company can legally disconnect your supply for persistent non-payment. Your water company cannot, even if you owe money. By law, water companies must maintain your supply. This is because water is essential to life, and cutting off someone's water is considered an unacceptable penalty. Knowing this changes your approach to the problem, you're not at immediate risk of losing your supply, which gives you breathing room to sort out your situation.
Payment Plans and Hardship Support
If you can't afford your bill, contact your water company before you miss a payment. Explain your situation. The company will offer you a payment plan, spreading your debt over months or even years, with monthly payments you can afford. This is standard and straightforward. The company doesn't want to pursue debt; they want to be paid eventually.
If you're on a low income (benefits, unemployed, low wages), ask about "matching payments" schemes. These work like this: you pay what you can each month, and the company makes up the difference, effectively subsidising your bill. It's means-tested and company-specific, but many companies offer this. You need to apply and provide proof of income.
Breathing Space and Debt Relief
If you're struggling with multiple debts (water, energy, rent, credit cards), you can access "breathing space", a formal 60-day period where creditors (including water companies) can't pursue debts or add interest. This is free and gives you time to work out a broader plan. Your local Citizens Advice office can help with this.
If you're in genuine hardship, your water company has a "hardship fund" or "assistance fund", money set aside specifically to write off or reduce bills for people in extreme difficulty. The application process varies by company, but you typically need to demonstrate genuine hardship (say, you've lost your job, had a major unexpected expense, or have a health issue affecting your ability to work). Not everyone who applies is approved, but many companies do write off debt for people in real difficulty.
Vulnerability Factors
If you're elderly, disabled, chronically ill, pregnant, have young children, or are a carer, your water company is required to flag you as "vulnerable" on their system. This means you get priority access to hardship schemes and support. You can self-declare as vulnerable, just ring your company and tell them. Being flagged doesn't cost anything and immediately makes support easier to access.
Getting Advice
If you're struggling with water bills or any household debt, free advice is available. Citizens Advice (citizensadvice.org.uk) offers free debt advice and can help you prioritise bills (water is important, but not the most important, rent or mortgage comes first). StepChange (stepchange.org) is a free debt charity. Your local council may also have welfare or advice services. Many councils employ money advisers who can help you navigate support schemes and applications.
The Consumer Council for Water (ccw.org.uk) is an independent watchdog. If you feel your water company has treated you unfairly or hasn't offered proper hardship support, you can complain to them.