The typical household water and wastewater bill is forecast to reach £639 in 2026/27, according to Water UK. That is a 5.4% increase from the previous year—but the national number hides large regional differences.
Average water bill by company
These are forecast company averages, not flat tariffs. A company’s average includes metered and unmetered customers across different household sizes.
| Company | 2026/27 | Change |
|---|---|---|
| Northumbrian Water | £535 | +£31 (6%) |
| Severn Trent Water | £587 | +£52 (10%) |
| Hafren Dyfrdwy | £635 | +£54 (9%) |
| Yorkshire Water | £636 | +£34 (6%) |
| Thames Water | £658 | +£3 (0.4%) |
| United Utilities | £660 | +£57 (9%) |
| Anglian Water | £674 | +£44 (7%) |
| Dŵr Cymru Welsh Water | £683 | +£31 (5%) |
| Wessex Water | £695 | +£17 (3%) |
| South West Water | £740 | +£39 (6%) |
| Southern Water | £759 | +£55 (8%) |
Average bill by household size
On a meter, more occupants usually means more consumption. These benchmarks use typical annual consumption and a blended England and Wales charging model.
Why your actual bill may differ
Your bill depends on your address, whether water and wastewater are supplied by different companies, and whether you are metered. A metered household pays for measured consumption plus fixed charges. An unmetered household generally pays using the property’s historic rateable value plus fixed charges.
If your water comes from a water-only company such as Affinity Water or Portsmouth Water, you will normally receive a separate wastewater charge from another company.
Frequently asked questions
How much is the average water bill per month?
The 2026/27 forecast annual average of £639 is equivalent to £53.25 a month. Many customers pay over 10 monthly instalments rather than 12, so the amount leaving your account can look higher.
Why are water bills different around the country?
Each regional company has different infrastructure, investment needs, environmental conditions and customer density. The services included also matter: a water-only company average excludes the separate wastewater bill.
Does the number of people affect an unmetered bill?
Not directly. An unmetered bill is usually linked to the property's historic rateable value. Household size affects metered bills because more people normally use more water.