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Ask most business owners when they last reviewed their water bill and the answer is never. That is not laziness. For most of living memory you could not switch water supplier at all. Since 2017 you can, and it remains one of the most overlooked opportunities in business overheads, precisely because so few owners realise the door is open. This guide explains how the market works, what you stand to gain, and exactly how to switch.
In short. Since April 2017 in England, and earlier in Scotland, businesses can choose their water retailer. You cannot change the pipes or the water itself, but you can change who bills you, reads your meter and handles your account. Switching can win better service, consolidated billing across sites, and water efficiency support that lowers your usage.
The business water market in England opened to competition in April 2017, following Scotland in 2008. Before that, your regional water company was your only option, whether you liked its service and billing or not. Now the market splits into two clear parts, and understanding the split is the key to understanding switching.
The wholesaler. Still your regional network. It owns the pipes, treats and delivers the water, and removes the wastewater. This does not change when you switch, so your supply is never at risk.
The retailer. The company that bills you, reads your meter, handles queries and manages your account. This is the part you can choose, and the part competition improves.
Switching retailer is less about a dramatic cut to the price of the water itself and more about service, billing and control. A better retailer can offer a single consolidated bill across several sites, clearer and more accurate billing, dedicated account support, and water efficiency reviews that reduce how much you use before the bill is even calculated.
For a business with multiple locations, consolidating water accounts under one retailer can save hours of admin every month and make budgeting far simpler. For a single site, the gain is usually better service and fewer estimated bills. Either way, it costs nothing to review, and staying put by default is rarely the best option.
Your bill has two main parts, and it helps to recognise both.
Water supply. Covers the clean water delivered to your premises, usually based on metered usage plus a fixed standing charge.
Wastewater, or sewerage. Covers what drains away, including foul water and often surface water drainage from your roofs and yards.
Most premises are charged on a meter, but some are still charged on rateable value, an older system based on the property rather than actual use. If your usage is low, moving to a meter can be fairer, so it is worth checking which basis you are on.
✓ Clear, consolidated billing, especially across multiple sites.
✓ The retailer margin and any service fees, shown plainly.
✓ Water efficiency support to cut your actual usage.
✓ Accurate meter based billing rather than repeated estimates.
✗ A long tie in paired with weak service promises.
✗ Estimated billing when an actual meter reading is available.
The process is designed to be simple, and your water supply is completely unaffected throughout.
1. Gather your details. A recent water bill, your supply address and your SPID, the Supply Point ID that identifies your supply.
2. Compare retailers on service, billing quality and price for your usage, not just the headline figure.
3. Agree the switch. The new retailer arranges everything with the wholesaler, and you simply start receiving bills from the new provider.
Switching water never changes the water itself or risks your supply. The pipes and the wholesaler stay exactly the same. Only the company that bills you changes, which is why there is so little downside to reviewing your deal.
Because water is charged largely on what you use, reducing consumption is often the biggest lever of all. Simple steps such as fixing leaks and dripping taps, fitting efficient fittings, and checking whether you are being charged for surface water drainage you do not have all lower the bill. A good retailer will help you find these, which is one reason service quality matters as much as price when you choose.
Owners rarely switch water on price alone. The usual triggers are repeated estimated bills that never seem to reflect reality, poor customer service when something goes wrong, the hassle of juggling separate accounts across several sites, and a suspicion that surface water or wastewater charges are wrong. A review often uncovers billing errors or drainage charges that should never have applied, which is why it is worth doing even if your current price seems acceptable. Even a single billing correction uncovered during a review, such as a drainage charge that should never have applied, can more than repay the small effort of switching, and the clearer, more accurate billing continues from then on rather than being a one off.
Most businesses in England and Scotland can. The market opened in England in April 2017 and in Scotland in 2008. Wales has more limited choice.
No. The water and the pipes come from your regional wholesaler and do not change. You are only changing the retailer that bills you.
Better service, clearer and consolidated billing, dedicated support and water efficiency reviews that reduce your usage. For multi site businesses the admin saving alone is often worth it.
A Supply Point ID, the unique reference for your water supply. You will find it on your bill, and a new retailer needs it to arrange the switch.
If your usage is low, a meter is often fairer than paying on rateable value. Check which basis you are on, and ask about switching to a meter if it would suit you.