If you run an SME in England or Scotland, there is a good chance you are paying more than you need to for water. Since the retail market opened, you can choose who bills and services your business account. Yet many firms have never compared options or checked whether their VAT and wastewater allowances are correct.
The good news is that switching is simple and does not touch the physical supply. Your pipes, mains and meters remain with the regional wholesaler. What changes is who invoices you, what you pay in retail margins and how well your account is managed.
This guide explains how the market works, what actually changes when you switch, and how to compare the parts of the bill that move the needle. We also outline practical checks for leaks, meters and allowances, and where WeSave fits if you want a free, managed comparison.
How the open water retail market works
In England and Scotland, wholesale water and wastewater services are delivered by regional wholesalers. They own and maintain the network and your physical connection. Retail suppliers handle billing, customer service and value‑add services such as efficiency audits and leak detection.
When you switch, your wholesaler does not change. Only the retailer changes. That means no engineering work, no downtime and no change to water quality or pressure. Ofwat oversees the market in England, with a similar framework in Scotland, and switching follows a regulated process to protect continuity of supply.
What really changes when you switch
Three things tend to change when you move retailer.
- Retail charges and how transparently they are presented
- Customer service quality, including query handling and bill corrections
- Access to efficiency support, such as audits, leak checks and data tools
Your standing and volumetric charges include a regulated wholesale element plus a retail margin. Retailers compete on that margin and on service. A good switch targets lower margins, clearer billing and proactive support that keeps your consumption and costs under control.
How to compare business water rates properly
A like‑for‑like comparison needs more than a single pence‑per‑cubic‑metre headline. Focus on:
- Standing charge: a fixed daily or monthly fee that can vary by meter size and wholesaler area. It often moves more of your annual cost than you expect, especially for low‑use sites.
- Volumetric charge: price per cubic metre for potable water and for wastewater. Check both potable supply and sewerage return rates.
- Wastewater allowances: many businesses do not return 100% of incoming water to sewer. An allowance (also called a return‑to‑sewer percentage) reflects what is actually discharged. If your process evaporates or incorporates water into products, an updated allowance can reduce sewerage charges.
- Trade effluent: if applicable, confirm consent status and charging formula. Misclassification can inflate bills.
- VAT treatment: VAT on water depends on your activity, usually determined by your Standard Industrial Classification (SIC) code. Most businesses pay VAT at the standard rate on water supply, but many pay 0% or have mixed treatment for wastewater. If your SIC code is wrong, you could be overpaying.
- Billing accuracy and meter reads: check estimated vs actual reads and how quickly corrections are processed. Errors left unchallenged compound over time.
If you prefer a managed review, WeSave will separate wholesale costs from retail margins, validate allowances, and check VAT treatment against your SIC code as part of a free comparison. You can start with our guide to compare business water rates and then ask us to sense‑check the numbers.
Leak detection, meter accuracy and why they matter
Unexplained consumption spikes often stem from leaks or metering issues. Both are fixable and can deliver immediate savings.
- Leak detection: a continuous base‑flow overnight when the site is closed is a common signal. Retailers can arrange surveys and low‑cost fixes. Even small leaks add up to material charges over a year.
- Meter accuracy: older or damaged meters can mis‑record usage. If you suspect an issue, request a meter accuracy test or install temporary logging to confirm patterns. Replacing a faulty meter is handled via the wholesaler and does not interrupt supply.
- Sub‑metering for multi‑tenanted sites: where feasible, sub‑meters improve cost allocation and highlight anomalies faster.
A proactive retailer will flag anomalies quickly, support investigations and help you recover overcharges where bills were wrong. That service element is as valuable as a lower retail margin.
Will switching water supplier interrupt supply?
No. Switching changes who bills you and manages the account. It does not change pipes, mains or water quality. The wholesaler continues to supply water and take wastewater as before, so there is no interruption during the switch.
Do businesses pay VAT on water rates?
VAT depends on your business activity and HMRC rules, typically applied using your SIC code. Many sectors pay VAT at the standard rate on water, some at 0%, and some have mixed treatment between water and wastewater. If your VAT line looks off, ask for a review. WeSave can check your classification and request corrections from the retailer if needed.
How much are business water rates?
Rates vary by region, meter size, usage profile and retailer margin. Bills usually combine a standing charge, volumetric charges for water and wastewater, and any trade effluent fees. Because wholesale components differ by wholesaler area, two sites with similar use can pay different totals. The best way to benchmark is to review a recent bill, break out wholesale vs retail, then compare retailers on the parts they control. We can do this for you and present side‑by‑side options without obligation.
Can I choose my business water supplier?
Yes, if your premises are in England or Scotland and are classed as non‑household. You can switch your water retailer and your wastewater retailer, often to the same company for simplicity. Your wholesaler remains the same either way.
How to get cheaper business water rates
Lower costs usually come from a combination of price and prevention.
- Compare retailers on standing and volumetric charges, invoice clarity and support.
- Review and update your return‑to‑sewer allowance if you do not discharge 100% of water to sewer.
- Fix leaks quickly and use data logging to spot waste.
- Check VAT treatment against your SIC code and correct any errors.
- Make meter readings regular. Actual reads reduce estimates and rebills.
WeSave handles these checks as part of a free review. We analyse your usage, validate allowances and VAT, compare live retailer margins and manage the switch end to end so you keep focus on the business.
For a simple starting point, visit our page on business water suppliers and request a free comparison. If you are also reviewing energy, our business energy hub explains how we manage switching and renewals across electricity and gas.
What to expect from WeSave
- Independent, impartial comparison with transparent breakdowns
- Negotiation of live retail margins across a trusted panel
- Bill analysis to find errors and recover overpayments where possible
- Managed switching with no service disruption and ongoing account support
- Access to efficiency services such as water audits and leak checks
Our service is free and no‑obligation. Share a recent bill and we will return clear options, typically within one working day.
Quick FAQ
- Can I choose my business water supplier? Yes. In England and Scotland non‑household customers can switch water and wastewater retailers while the wholesaler stays the same.
- How much are business water rates? They vary by region, meter size, usage and retailer margin. Review standing charges, volumetric rates and wastewater allowances for a true comparison.
- Will switching water supplier interrupt supply? No. The physical supply remains with the regional wholesaler, so service continues as normal during the switch.
- Do businesses pay VAT on water rates? It depends on your activity as shown by your SIC code. Many pay the standard rate, some pay 0%, and some have mixed treatment. Check your bill if unsure.
- How can I get cheaper water rates? Compare retailers, correct VAT and allowances, fix leaks, and ensure accurate meter reads. A managed review can bundle these steps.
Next step
If you want lower, cleaner water bills without the admin, WeSave can help. Send us a recent invoice and we will benchmark wholesale vs retail charges, check VAT and allowances, and manage a smooth switch if it makes sense. You can explore business water suppliers or start a review now. If you are consolidating utilities, see our guidance on business energy to compare options for electricity and gas at the same time.
Contact WeSave on 01872 495 111 (Monday to Friday, 09:00 to 17:30) or hello@wesave.co.uk.
Links to help you take action: