Most UK business owners assume their water bill is straightforward: you use water, you pay for it. But if you’ve ever been surprised by a hefty water bill despite similar usage patterns, you’re not alone. The reality is that water usage often represents less than half of your total water costs.
Since water market deregulation in England in 2017, businesses now have choices in water suppliers, but the billing structure remains complex. Understanding these various charges is crucial for controlling costs and identifying potential savings.
Your water bill consists of multiple components, some based on usage and others that are fixed regardless of how much water you consume. Here’s what every UK business owner needs to know about the hidden costs in their water bill.
The two-part charging system: Water and sewerage
Before diving into specific charges, it’s essential to understand that UK businesses typically pay for two distinct services:
Water services: The supply and treatment of clean water to your premises
Sewerage services: The removal and treatment of wastewater from your property
Standing charges: The cost of being connected
What it is: Standing charges are fixed daily fees you pay regardless of water consumption, covering the cost of maintaining pipes, infrastructure, and your connection to the network.
Why it matters: For many businesses, standing charges can represent 30-50% of their total water bill. These charges vary significantly between regions and water companies.
Real-world example: A small office in Beverley might pay £0.85 per day in water standing charges and £1.20 per day for sewerage standing charges. That’s £748 annually before using a single drop of water.
Regional variations: Standing charges vary dramatically across the UK. Yorkshire Water charges approximately £0.34 daily for water services, while Thames Water charges around £1.18 daily – a difference that adds up to over £300 per year for identical businesses.
Volumetric charges: More than just water in
What it is: These are charges based on the volume of water you use, typically measured in cubic metres (m³). However, many businesses pay different rates for water supply versus sewerage services.
Why it matters: Sewerage charges are often 80-120% of your water supply charges, meaning you’re effectively paying double for every cubic metre that goes down the drain.
Real-world example: A restaurant using 50m³ of water monthly might pay:
- Water supply: 50m³ × £1.45/m³ = £72.50
- Sewerage: 50m³ × £1.63/m³ = £81.50
- Total volumetric charges: £154.00
The sewerage assumption: Most water companies assume that 95% of water supplied to your business returns to the sewerage system. If you use water for processes where it doesn’t return (like irrigation, manufacturing, or cooling towers), you may be overpaying for sewerage services.
3. Surface water drainage charges
What it is: If rainwater from your property’s roofs, car parks, or paved areas drains into the public sewerage system, you’ll pay surface water drainage charges based on your property’s “rateable value” or assessed drainage area.
Why it matters: Many businesses pay these charges without realising they could reduce or eliminate them through sustainable drainage systems or by proving their surface water doesn’t enter the public system.
Real-world example: A warehouse with a large roof and car park might pay £400-£800 annually in surface water drainage charges, even though they use minimal water for their operations.
Potential savings: Businesses that install soakaways, direct drainage to watercourses, or implement sustainable drainage systems (SuDS) can often reduce or eliminate these charges entirely.
Trade effluent charges
What it is: If your business discharges anything other than typical domestic wastewater – including fats, oils, chemicals, or high-strength organic matter, you’ll face additional trade effluent charges.
Why it matters: These charges can dramatically increase your bill and often catch businesses off-guard. Charges are typically based on volume, strength, and the type of contaminants in your discharge.
Real-world example: A food processing business might pay standard sewerage charges plus:
- £0.45/m³ for high biological oxygen demand
- £0.67/m³ for suspended solids
- £1.20/m³ for fats, oils, and grease
This could triple their sewerage costs compared to a standard office.
How to reduce it: Install grease traps, pre-treatment systems, or modify processes to reduce contamination levels in your wastewater.
Rateable value-based charges
What it is: Some charges, particularly for surface water drainage and certain standing charges, are based on your property’s rateable value rather than actual usage or property size.
Why it matters: Your rateable value might not reflect your actual water usage or drainage impact. A high-value office building with minimal water use could pay more than a low-value manufacturing facility with heavy water consumption.
Real-world example: Two identical restaurants might have different rateable values due to location or property age, resulting in drainage charges of £150 versus £400 annually for the same drainage impact.
Potential action: If your rateable value seems disproportionate to your water usage or property characteristics, you may be able to appeal or request a drainage assessment.
Meter reading and connection charges
What it is: Charges for meter reading, testing, and maintenance, plus any fees for new connections, disconnections, or meter relocations.
Why it matters: While individually small, these charges can accumulate, particularly for businesses with multiple meters or frequent property changes.
Typical costs:
- Meter reading: £8-£15 per visit
- Meter testing: £50-£150
- New connection: £500-£2,000+ depending on complexity
The impact of market competition
Since deregulation, eligible businesses (using over 50 megalitres annually or with premises valued over £50,000) can choose their water retailer. This competition has introduced new opportunities for savings:
Competitive pricing: Different retailers offer various tariff structures and pricing models Value-added services: Some retailers include water efficiency audits, leak detection, or bill management services
Flexible payment terms: Monthly, quarterly, or annual payment options with different discount structures
What this means for your business
Understanding your water bill structure is crucial for several reasons:
- Cost control: Knowing which charges are fixed versus variable helps with budgeting and identifying optimization opportunities
- Supplier comparison: When comparing water retailers, you need to understand all charge components, not just unit rates
- Infrastructure decisions: Understanding drainage charges might justify investment in sustainable drainage systems
- Process optimisation: Knowing about trade effluent charges can drive operational changes that reduce wastewater treatment costs
Take control of your water costs
Start by examining your last 12 months of water bills and identifying each charge component. Look for:
- Disproportionate standing charges relative to usage
- Surface water drainage charges that might be reducible
- Trade effluent charges that could be minimised through operational changes
- Regional variations if you have multiple sites
Don’t assume your water bill is beyond your control. With proper understanding and strategic approach, many UK businesses can reduce their water costs by 15-30% through tariff optimisation, supplier switching, infrastructure improvements, or operational changes.
Ready to take control of your business water costs? Contact Eazycomm for a comprehensive analysis and comparison of your water bills and discover the savings opportunities hiding in your monthly charges.