Water bills don’t always get much attention - until they go up. Many customers noticed rises in April 2025, and with the cost of living climbing too, it makes sense to look for ways to save.

One option is changing to a water meter. But is it right for you?

How Do Water Bills Work?
If you have a water meter
You’re charged for the exact amount of water you use, plus a standing charge, which covers things like billing and customer support. Most water companies also add charges for waste water (sewage) and surface water drainage, based on your useage.

Without a water meter (unmetered)
Your bill is based on what is called the Rateable Value (RV) of your home. This is an old system used between 1973 - 1990. It looked at things like the size and location of your home. A standing charge is added too. Homes built after 1990 usually have meters as standard.

What Is Rateable Value (RV)?
If you don’t have a water meter, your bill is probably based on your home’s Rateable Value (RV), sometimes called water rates or fixed charge.

RV has nothing to do with how much water you actually use. It was worked out by government valuers many years ago, based on the rental value of your home at the time.

That means things like extensions, loft conversions or extra people in the house won’t be reflected in your bill today. In fact, a small flat and a big house could end up paying the same amount - no matter how much water they use.

What About Assessed Charges?
Some newer homes don’t have a water meter, and can’t be billed using RV. In these cases, bills are based on an assessed charge. This is an average water use for a property of your size - not on how many people live there or how much water you use.

Could a Water Meter Save Me Money?
It depends.

• If you live alone or as a couple in a larger home, a meter could save you money.
• If you have a big family or use a lot of water, it may cost more.

The easiest way to check is with the Water Meter Calculator from the Consumer Council for Water (CCW).

Do I Need Permission to Get a Meter?
As a tenant, you can ask for a water meter, Severn Trent recommends getting your landlord’s consent. 

It’s simple - just fill in a Home Improvement request which you can get by contacting our Customer Service Centre. We’ll then give written permission to have the meter fitted.

So, is a water meter worth it? 
For some, yes, but it’s best to check your own situation before making the switch.