Rising Water Bills: Time To Change Business Water Supplier?

Water bills have become an increasingly prominent topic in the UK, with customers facing significant increases as the water industry prepares for a major programme of investment.

A BBC report highlights how water companies have been permitted to raise additional revenue to help fund investment and improvements across the sector. 

The increases come as the industry faces growing pressure to tackle pollution, improve infrastructure, reduce leakage and strengthen water supplies for the future.

For households, rising bills are an obvious concern. For businesses, however, the situation raises a different question: are you doing enough to manage your commercial water costs?

Businesses cannot control the wider price of maintaining the UK’s water infrastructure, but eligible organisations in England do have an important degree of choice. 

They can access online comparison platforms and change business water suppliers to a provider that offers the right combination of pricing, service and support. With water becoming a more significant business expense, that choice deserves attention.

Why are water bills increasing?

The latest increases are closely connected to the scale of investment now required across the water sector. Ofwat’s 2024 price review approved around £104 billion of investment for the five years from 2025 to 2030. 

The programme is intended to improve infrastructure, strengthen resilience and support environmental improvements, including reducing pollution and improving rivers and seas.

Five water companies subsequently challenged aspects of Ofwat’s price controls, with the Competition and Markets Authority (CMA) reviewing the disputed decisions.

In March 2026, the CMA allowed five companies an additional £463 million of revenue, although this was substantially less than the £2.7 billion they had requested. 

The CMA said the additional funding would contribute to investment, pollution reduction, supply resilience and higher financing costs.

The important point for businesses is that the water sector is undergoing a period of considerable financial and operational change. That makes understanding your own commercial water arrangements increasingly worthwhile.

Businesses need to look beyond the headline price

When water prices increase across the industry, it can be tempting to assume there is little a business can do.

After all, water is an essential service and the infrastructure is regulated. But there is an important distinction between the wholesale side of the industry and the retail side.

The regional wholesaler is responsible for the physical infrastructure and the water and wastewater services. The retail supplier deals directly with the business customer, handling areas such as billing, account management and customer service.

Eligible businesses in England can choose their retail water supplier. That means organisations have the opportunity to compare what is available rather than simply accepting their existing arrangement indefinitely.

A water bill is more than a tariff

Price is obviously important when reviewing a commercial water contract, but it is only one part of the overall picture. Businesses should also consider how effectively their supplier helps them understand and manage their water consumption.

For example, useful services can include:

• Clear and accurate billing
• Online account management
• Detailed consumption information
• Metering support
• Leak detection and water efficiency advice
• Dedicated account management
• Consolidated billing for businesses with multiple premises

A slightly different tariff may make a difference to the bottom line, but better information and support can help reduce the amount of water a business uses in the first place.

Consumption can be just as important as price

One of the easiest mistakes businesses make is concentrating on the unit cost of water while overlooking consumption.

If a business is wasting thousands of litres every month because of inefficient equipment, leaks or poor processes, securing a marginally better tariff will only address part of the problem.

A more comprehensive review considers both sides:

• What are we paying for water?
• How much water are we actually using?

This is where water management can become much more valuable. A business that monitors consumption can identify unusual patterns, investigate unexplained increases and establish where reductions might be possible.

Don’t assume your existing supplier is still the best fit

Businesses often stay with the same water retailer simply because changing supplier has never been considered a priority.

There may be perfectly good reasons for remaining with the existing provider. But those reasons should ideally be based on a recent assessment rather than habit.

Business circumstances change. You may have expanded your premises, opened new sites, reduced office occupancy, changed production methods or introduced new sustainability targets.

Your expectations of customer service may also have changed. A supplier that was appropriate several years ago may no longer provide the level of reporting, support or flexibility your organisation now needs.

What about the infrastructure investment?

It is also important to recognise why additional funding is being allowed. The UK needs investment in ageing infrastructure, environmental improvements and long-term water security. 

Ofwat says its price review is designed to provide funding for resilient supplies and cleaner rivers and seas, while also protecting customers through performance requirements and mechanisms that can return money where companies fail to deliver promised outputs.

Businesses therefore shouldn’t view rising water costs solely as an unwanted increase. There is a wider challenge to be addressed: maintaining a reliable water system while responding to population growth, climate pressures, environmental requirements and ageing infrastructure.

The sensible response for individual businesses is to become more informed about their own water use and costs.

Focus on what you can control

No individual business can determine how much investment is required across the UK’s water network. But it can decide how carefully it manages its own water services.

Reviewing bills, monitoring consumption and addressing leaks can all reduce unnecessary expenditure. Comparing commercial water suppliers provides another opportunity to make sure the business is receiving competitive pricing and an appropriate level of service.

With billions being invested in the UK’s water infrastructure and customers contributing towards that investment through their bills, water is becoming an increasingly important cost to manage.

For businesses, the answer is to understand what you are paying, why you are paying it, how much water you are using, and whether your current commercial water supplier is still the right choice for your organisation.