How we calculate your bill

Information about how much we charge for 2021–22.

How we calculate your bill

We recognise it’s not always easy to get your head around how any utility company works out what you owe. It can be complicated. Here, you’ll find a simpler breakdown of our charges for water, wastewater (that’s all the dirty water we take away from your homes and properties) and sometimes other services.

 

How charges are worked out

The water regulator Ofwat sets a ceiling on the amount of money any water company can make. Within this context, we review our charges every year and have these approved by our non-executive board as part of our governance process.

We charge you based on your meter reading, which tells us how much water you’ve used and dirty water we’ll need to take away (most of you have a meter these days).

Take a look at how much water the average household uses to get an idea of what to expect from your bill.

 

Charges for metered properties

Water meters record the amount of water you’ve used. In the table below, you’ll see how we charge per cubic meter. One cubic metre is a thousand litres, or put simply, it’s about the amount you’d use if you took 11 baths, or 31 showers (each lasting four minutes), or flushed the loo 166 times (using the large button).

Service Annual standing charge* Charge £ per cubic metre
Water supply £21.50 £1.487
Wastewater £23.81 £2.045
Surface water drainage £21.60***
Highway drainage £10.80

* Charges are for the year 1 April 2021 to 31 March 2022.
** For normal domestic meters
*** In certain circumstances a surface water rebate is available.


 

Charges for metered properties

Water meters record the amount of water you’ve used. In the table below, you’ll see how we charge per cubic meter. One cubic metre is the equivalent of a thousand litres, or put simply, it’s about the amount you’d use if you took 11 baths, or 31 showers (each lasting four minutes), or flushed the loo 166 times (using the large button).

Number of bedrooms Water charges for year Sewerage charges for year*
Single occupier £112.98 £172.62
1 bedroom £142.72 £209.43
2 bedrooms £172.46 £248.29
3 bedrooms £194.77 £276.93
4 bedrooms £202.20 £285.10
5 bedrooms £212.6 £299.42

* If you receive a surface water rebate deduct £25.90


 

Other charging methods

When you don’t have a water meter (you can apply for a water meter), you’ll be charged in one of the following ways:

  • Assessed bills: based on the number of bedrooms at your property, or whether someone is a sole occupant.
  • Unmetered bills: based on the rateable value of your home, as set at 31 March 1990 (this measure is set by a branch of the government and is broadly based on how much your property would fetch in rent over the period of a year).
  • A fixed annual fee: if your home doesn't have a rateable value and you're not on an assessed charge. 

 

Charges for assessed properties
Service Annual standing charge Charge per £ of rateable value Minimum charge
Water supply £17.82 £0.934 £75.81
Wastewater £19.58 £1.236 £107.20
Surface water drainage £21.60*
Highway drainage £10.80

* In certain circumstances a surface water rebate is available.


Further information on our charge schemes

Charges schemes for all Southern Water household customers 

2021-22:

Household Charges Scheme 2021–22

Retail Charges Assurance Statement

2019–20:

Household Charges Scheme 2019–20

 2020–21:

Household Charges Scheme 2020–21

Retail Charges Assurance Statement

 

If you're a South East Water customer and have a water meter, find out how we calculate your sewerage charges.

2021-22:

Charges guide for South East Water customers 2021–22

2019–20: 

Charges guide for South East Water customers 2019–20

 2020–21: 

Charges guide for South East Water customers 2020–21

South East Water metering charges guide 2020–21

 

I have a question about my bill that isn’t covered here

If you receive your water from a separate company, find out about our wastewater charges.

Wastewater-only customers

 

Our charges update each year on 1 April – if your billing period spans two charging amounts, we'll calculate your bill accordingly.

Has your bill gone up?

While everyone’s been at home more, we’ve all been using more water – so your bill may have gone up. Using less water could reduce your costs.
Find tips to save water
 
 
 
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