How Much Does Southern Water Cost in the UK?
Southern Water charges the average household around £30 per month for water and sewerage services. Southern Water supplies approximately 4.7 million people across Kent, Sussex, Hampshire, and the Isle of Wight. Water prices are regulated by Ofwat and you cannot switch your water supplier.
| Service | Typical Monthly Cost | Billing Method |
|---|---|---|
| Unmetered (rateable value) | £30–£40 | Fixed annual charge |
| Metered | £24–£33 | Based on actual usage |
| NewStart tariff (social tariff) | £16–£20 | For eligible low-income households |
Southern Water bills are set annually with new charges typically applying from April. According to Water UK, the average UK water bill was £448 per year in 2025-26. Southern Water's charges are broadly in line with the national average. The company has been required by Ofwat to make rebates to customers following performance failures.
For a full comparison of UK utility costs, see our guide to UK Utilities subscriptions.
Does Southern Water Auto-Renew?
Yes, Southern Water charges continue automatically. Direct debit payments are taken monthly, spreading the annual charge across 12 equal instalments. Southern Water reviews charges each April in line with Ofwat's price determinations.
Metered customers are billed based on actual water usage, with meters read approximately every six months. Unmetered customers pay a fixed amount based on the rateable value of their property. Southern Water sends annual billing notifications before the new rates take effect.
You can submit meter readings online or through the Southern Water app to keep bills accurate between official reads.
How to Cancel Southern Water
You cannot cancel or switch your water supplier in England. Water supply is a regional monopoly — Southern Water is the only provider for its service area in the South East. You can reduce your bill through support schemes.
Options to lower your Southern Water bill
- Request a water meter — free installation, often reduces bills for smaller households
- NewStart tariff — social tariff offering reduced charges for low-income households
- WaterSure — caps metered bills for qualifying households with medical or family needs
- Breathing Space — 60-day moratorium on bill collection for customers in financial difficulty
- Water-saving devices — free devices from Southern Water to reduce usage
If you are moving out of the Southern Water supply area, contact them to close your account and receive a final bill.
For other water suppliers, see our guides to Thames Water and South West Water.
Is Southern Water Worth It in 2026?
Southern Water is your only option for water in its South East England service area. The company has faced significant regulatory scrutiny for sewage discharges but continues to invest in infrastructure improvements under Ofwat oversight.
| Pros | Cons |
|---|---|
| Regulated pricing controlled by Ofwat | Cannot switch to another supplier |
| NewStart social tariff for low-income customers | Company fined for sewage pollution incidents |
| Free water meter installation | Customer service ratings below industry average |
| Monthly direct debit spreads costs | Bills may include Ofwat-mandated rebates |
| Priority Services for vulnerable customers | Annual price increases set by regulator |
Southern Water was fined £90 million by Ofwat for serious pollution incidents. As a customer, your service continuity is guaranteed regardless. Focus on managing your bill through metering and applying for support tariffs if you are on a low income.
Track Your Southern Water Subscription with Prunely
Prunely lets you add your Southern Water bill to see exactly when your next payment falls. Set custom reminders so you get an alert before you are charged. Track your water costs alongside all your other subscriptions — energy, broadband, insurance, and more — without connecting a bank account. Prunely is free for up to 5 subscriptions.
Frequently Asked Questions
How much does Southern Water cost per month?
Southern Water charges the average household around £30 per month for water and sewerage. Metered customers may pay less depending on usage. Annual charges are set by Ofwat and typically change each April. Some bills may include regulatory rebates.
Can I switch from Southern Water to another company?
No, water supply is a regional monopoly in England. Southern Water is the only supplier for parts of Kent, Sussex, Hampshire, and the Isle of Wight. You cannot choose an alternative. If you move to a different area, your new local water company provides service automatically.
What is Southern Water's NewStart tariff?
NewStart is Southern Water's social tariff for low-income households. It offers reduced water charges for eligible customers. Eligibility depends on household income and receipt of qualifying benefits. Apply through the Southern Water website or by calling customer services.
Has Southern Water been fined for pollution?
Yes, Southern Water has faced significant fines from regulators for illegal sewage discharges. Ofwat imposed a £90 million fine. The company has committed to major investment in wastewater infrastructure. Customer bills are protected through Ofwat's price controls regardless of fines.
How do I track my Southern Water spending?
Add your Southern Water direct debit to Prunely to track payments alongside all your other subscriptions. You can also manage your account at southernwater.co.uk, submit meter readings, and check your eligibility for financial support schemes.