Calculate your water and sewerage charges for Hampshire, Kent, Sussex, and Isle of Wight. Serves Southampton, Portsmouth, Brighton, Canterbury, Eastbourne.
Calculate your 2025-26 water and sewerage charges:
If you have a water meter, charges based on actual usage measured in cubic meters (m³):
| Charge Type | 2024-25 Rate | 2025-26 Rate | Increase |
|---|---|---|---|
| Water Standing Charge | £23.96/year | £38.06/year | +59% |
| Water Volumetric Rate | £1.958/m³ | £2.753/m³ | +41% |
| Wastewater Standing | £27.76/year | £43.48/year | +57% |
| Wastewater Volumetric | £2.461/m³ | £3.794/m³ | +54% |
| Surface Water Drainage | £25.98/year | £40.88/year | +57% |
| Highway Drainage | £12.99/year | £20.44/year | +57% |
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All Southern Water charges increased 40-60% in one year! Typical 120 m³/year household bill breakdown:
Southern Water bills rising dramatically 2024-2030 - highest increases of any UK water company:
Total increase 2024-2030: £164/year (34% over 6 years) - but peak 2028-29 at £815 = 71% increase from 2024-25! Funds £3.1 billion infrastructure program including sewage reduction, leakage reduction, water quality improvement, environmental protection.
Southern Water requires £3.1 billion investment 2025-2030 to address serious infrastructure issues:
Southern Water has worst performance record of any UK water company 2020-2025:
Customers are funding Southern Water's infrastructure improvements to fix problems caused by decades of underinvestment.
Critics argue:
However, Ofwat argues: Without investment, water quality and sewage issues would worsen. Bill increases necessary to bring Southern Water up to acceptable standards. Alternative would be nationalization (government takeover) which would cost taxpayers more.
Southern Water serves 2.2 million households and businesses across South East England:
Check if Southern Water serves your area: Enter postcode at www.southernwater.co.uk or call 0800 027 0363. If not Southern Water, you may be served by South East Water (water only), Portsmouth Water (water only), or Thames Water (West London/parts of Surrey).
Southern Water sends bills twice per year (half-yearly billing):
| Payment Method | How It Works | Pros | Cons |
|---|---|---|---|
| Direct Debit (Monthly) | Spread annual cost over 12 monthly payments | Spread cost evenly, automatic, DD guarantee protection | Builds credit in summer, uses credit in winter |
| Direct Debit (Half-yearly) | Pay exact bill amount twice per year | Pay only what billed, no credit build-up, automatic | Large payments twice per year (£300-400 each) |
| Online/Phone Payment | Pay by debit/credit card when billed | Control over payment timing, no DD setup | Must remember to pay, risk late payment |
| Bank Transfer | Manual transfer to Southern Water account | No card fees, flexible timing | Must remember account details |
| PayPoint (Cash) | Pay cash at PayPoint stores | No bank account needed, cash payment | Must visit store, risk losing barcode |
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WaterSure Plus caps metered bills at £405/year for low-income households with high essential water needs - huge saving vs £703 average!
Eligibility criteria (must meet ALL):
Benefits:
Apply: Call 0800 027 0363 or apply online at www.southernwater.co.uk/watersure - provide benefit proof and GP letter if medical condition.
Southern Water will install a water meter FREE of charge. Whether metered is cheaper depends on household size and rateable value:
Example: 2-person household using 80 m³/year with RV £250
Unmetered: £14.08 + (£250 × 1.0048) + wastewater/drainage = ~£500/year
Metered: £81.54 standing + (80 × £6.547) + drainage £61.32 = £666/year
Unmetered £166/year cheaper! Actually for Southern Water, unmetered often better due to high metered rates.
Southern Water has highest metered rates in England (£2.753 water + £3.794 wastewater = £6.547/m³ total).
For comparison:
Result: Many Southern Water customers find meters INCREASE their bills unless very low usage. Always use the calculator above to check before requesting meter installation!
Southern Water consistently ranks LAST for customer satisfaction (15th of 15 water companies):
Common complaints: Extremely high bills, billing errors (overcharging), slow response to queries, difficulty contacting customer service, sewage discharge issues, water quality problems, leaks taking months to fix.
If you have issues with Southern Water, follow escalation process:
2025-26 charges: Average bill £703/year £59/month increased from £478 in 2024-25 = 47% increase £225/year HIGHEST of any UK water company. Metered charges £38.06 standing + £2.753/m³ water + £3.794/m³ wastewater + £40.88 surface + £20.44 highway drainage, typical 120 m³ household pays £928/year. Unmetered based on rateable value ~£1.00/£RV water + £1.23/£RV wastewater typical RV £200 pays ~£500/year often cheaper than metered due to Southern Water's extremely high metered rates (highest in England).
Bill increases 2024-2030: Rising from £478 (2024-25) to peak £815 (2028-29) then declining to £642 (2029-30) = 71% peak increase funding £3.1 billion infrastructure. 2025-26 saw massive 47% jump, further rises 2026-27 £750 (+6.7%), 2027-28 £773 (+3.1%), 2028-29 £815 (+5.4%). Increases fund sewage discharge reduction 90% by 2030, leakage reduction from 95M to 65M liters/day, water quality improvements, environmental protection, new connections for 55,000 homes/year.
Why bills so high: Southern Water has worst performance record UK 2020-2025 - illegally dumped sewage 21,000 times fined £90M record, water quality failures boil notices Brighton/Portsmouth, leakage 22% highest rate England, customer service ranked last 15th of 15. Decades of underinvestment while paying £100M dividends to shareholders now requiring £3.1B catch-up investment passed to customers via bills. Ofwat special measures 2021 due to failures. Controversial customers funding fixes for company's failures.
Service area: 2.2 million customers South East England Hampshire/Isle of Wight/West Sussex/East Sussex/Kent (east only), major cities Southampton/Portsmouth/Brighton/Eastbourne/Canterbury/Worthing/Crawley. Fastest growing region UK 55,000 new homes/year, population 4.5M growing 1.2% annually, classified "seriously water stressed" high demand low rainfall.
Payment options: Half-yearly bills April and October, Direct Debit monthly spreads cost, DD half-yearly pays exact bill, online/phone/bank transfer/PayPoint cash. WaterSure Plus caps metered bills £405/year for low-income households high water needs 3+ children OR medical condition + benefits saves £298/year vs £703 average. Essential Water Support £175 discount low-income, Young Persons Tariff 50% discount care leavers 18-24, payment plans 12-24 months, Restart Grant up to £1,500 debt write-off.
Water meters: FREE installation but often MORE expensive at Southern Water due to highest metered rates England £6.547/m³ total (33-36% higher than other companies). Unmetered often cheaper for Southern Water customers unless very low usage under 80 m³/year 1-2 people. Always calculate before requesting meter. 2-year trial period can revert if bills higher. Installation 6-10 weeks longer than other companies.
Customer service: 0800 027 0363 Mon-Fri 8am-6pm emergency 24/7, online account www.southernwater.co.uk/myaccount, submit meter readings to avoid estimates. WORST RATED water company England 2.8/5 satisfaction (last of 15), 287 complaints per 10,000 highest industry, 92.1% billing accuracy worst, 61% first-time resolution worst, 1.4/5 Trustpilot "Bad". Common complaints high bills, billing errors, slow responses, sewage discharge, water quality, leaks. Escalation: contact SW > escalate senior > deadlock letter > CCW 0300 034 2222 > WATRS compensation up to £10,000.
Bottom line: Southern Water has by far worst performance and highest bills of any UK water company. 47% bill increase 2024-25 to 2025-26 catastrophic for customers funding £3.1B infrastructure catch-up after decades company underinvestment and illegal sewage dumping. Average bill £703/year 2025-26 rising to £815 by 2028-29 vs England average £473 = 52% more expensive. Customer service appalling 2.8/5 ranked last, billing errors common, difficult to contact. Apply for WaterSure Plus if eligible saves £298/year caps at £405, Essential Water Support £175 discount. Check meter vs unmetered carefully - meters often MORE expensive Southern Water due to £6.547/m³ highest rates England, many customers save staying unmetered. If moving to South East England aware water bills will be significantly higher than most UK regions. Consider complaints to CCW/WATRS if billing issues as Southern Water unlikely to resolve internally given poor customer service record.