How you are billed
We follow guidance from our regulator Ofwat when setting our charges. We also consult the Consumer Council for Water (CCW), the voice for water consumers. Your bill is then worked out based on your tariff and the services you receive from us.
Our charges are going up from 1 April 2025. We’ll use the extra funding to invest in our network and improve our services over the next five years.
On average, our bills for typical water and wastewater customers will increase by £17 per month in 2025-26. Find out why our charges are changing.
If you live in a property in our supply area, you're responsible for paying the bill. View more about bill responsibility.
2025-26 charges
2024-25 charges
You can also view our previous charges.
How different customers are billed
We go through how each of our customers are billed from unmetered, metered and wastewater.
![A child washes up dishes in the sink with her mother](https://www.thameswater.co.uk/media-library/images/card-images/water-wastewater-cad-image-920x360px.jpg)
Unmetered customers
As you don't have a water meter, we'll work out your clean and wastewater charges based on the rateable value of your property.
![A customer reads digital water meter](https://www.thameswater.co.uk/media-library/images/card-images/metered-cad-image-920x360px.jpg)
Metered customers
Every six months, we'll send you a bill that covers the supply of clean water and the treatment of wastewater.
![A customer washes up a plate with the tap off](https://www.thameswater.co.uk/media-library/images/card-images/wastewater-card-image-920x360px.jpg)
Wastewater customers
Depending on where you live and who supplies your tap water, you might receive a combined bill or two separate ones.
Extra help when you need it
Sometimes it can be difficult to stay on top of your household payments. Our help paying your bill code of practice document goes through:
- Understanding your bill
- How you can pay your bill
- What support is available if you’re finding it difficult to pay
- The process we use to collect unpaid charges from our household customers
- Further support available
You can also sign up for our Priority Services if you or someone you know needs a little extra support.