Student bills in Cardiff: energy, water and council tax
Short answer
Cardiff is in Ofgem's South Wales energy region. For 1 October to 31 December 2026, daily Direct Debit standing charges are 55.41p for electricity and 29.96p for gas. Dŵr Cymru Welsh Water provides water and sewerage. A house of full-time students pays no council tax, but must claim the exemption from Cardiff Council.
Updated
55.41p
a day, electricity standing charge
Direct Debit, South Wales region, Oct to Dec 2026
29.96p
a day, gas standing charge
Direct Debit, South Wales region, Oct to Dec 2026
£0
council tax when everyone in the house is a full-time student
You still have to claim the exemption
What a Cardiff student house pays for energy at South Wales cap rates, who supplies the water, how Cardiff Council handles the student council tax exemption, and what else to set up. Every rate and rule links to the page it came from.
Energy cap rates in Cardiff: South Wales region, 1 October to 31 December 2026
| Rate | Direct Debit | Prepayment meter |
|---|---|---|
| Electricity unit rate (per kWh) | 26.55p | 25.74p |
| Electricity standing charge (per day) | 55.41p | 55.41p |
| Gas unit rate (per kWh) | 8.09p | 7.80p |
| Gas standing charge (per day) | 29.96p | 29.96p |
Which energy rates apply in Cardiff?
Cardiff is in Ofgem's South Wales region, where National Grid Electricity Distribution runs the electricity network. The region sets the most a supplier can charge on a default tariff.
- Ofgem's postcode lookup puts central Cardiff postcodes, including CF10, CF14 and CF24, in the South Wales region.
- Direct Debit, 1 October to 31 December 2026: electricity 26.55p per kWh with a 55.41p daily standing charge, and gas 8.09p per kWh with a 29.96p daily standing charge.
- Prepayment meter: electricity 25.74p per kWh with a 55.41p daily standing charge, and gas 7.80p per kWh with a 29.96p daily standing charge.
- Ofgem says the cap limits these rates, not the total bill: the more energy you use, the higher your bill. A fixed tariff follows its own rates instead.
- Electricity rates are for single-rate meters. Multi-rate tariffs such as Economy 7 have their own capped rates on Ofgem's page.
Sources: Ofgem: price cap rates by region, with its postcode lookup (read 13 October 2026); Ofgem: energy price cap and standing charges explained (read 13 October 2026)
What would energy cost a Cardiff student house?
An illustration, not a quote: Ofgem's typical usage for one household, priced at the South Wales Direct Debit cap rates. A shared house usually uses more.
- Ofgem's typical consumption is 2,500 kWh of electricity and 9,500 kWh of gas a year. At the South Wales Direct Debit rates, with a standing charge for all 365 days, that is about £1,744 a year: £866 for electricity and £878 for gas.
- Shared by three: about £581 each a year, or £48.44 a month.
- Shared by four: about £436 each a year, or £36.33 a month.
- Shared by five: about £349 each a year, or £29.07 a month.
- The same usage on a prepayment meter comes to about £1,696 a year at the South Wales prepayment rates.
- These figures assume a default tariff, single-rate electricity and a full year at the October to December 2026 rates, although Ofgem sets the cap every 3 months. A house of three to five adults usually uses more than one typical household, so treat them as a starting point, not a forecast.
Sources: Ofgem: price cap rates by region, with its postcode lookup (read 13 October 2026); Ofgem: typical domestic consumption values decision, May 2026 (PDF) (read 13 October 2026); Ofgem: energy price cap and standing charges explained (read 13 October 2026)
Who supplies water in Cardiff?
Dŵr Cymru Welsh Water supplies water and takes waste water away in Cardiff.
- Welsh Water says it supplies drinking water to 3 million people in most of Wales, Herefordshire and parts of Deeside, and takes away and treats their wastewater.
- It bills students from the tenancy start date, such as 1 July, until the tenancy ends, holidays included. It offers no student discount or student tariff.
- Up to two people can be named on the account and the bill, and they are responsible for it. Other housemates can be added as nominees who can discuss the account.
- In England and Wales, students usually pay for water unless it is included in the rent. Citizens Advice says a tenant either has a water bill in their own name or pays for water as part of the rent, so check the tenancy agreement.
- Water UK's postcode checker names the water and the waste water company for an exact address. CCW says a few specific sites are served by another licensed company instead of the usual one.
Sources: Dŵr Cymru Welsh Water: about us (read 13 October 2026); Dŵr Cymru Welsh Water: student advice (read 13 October 2026); CCW: find your water company (read 13 October 2026); Citizens Advice: paying your water bills if you're renting (read 13 October 2026); Water UK: find your supplier (read 13 October 2026)
Do students pay council tax in Cardiff?
Not if everyone in the house is a full-time student, but you still have to claim the exemption from Cardiff Council.
- The Welsh Government says a full-time student living in a home occupied only by other full-time students does not pay council tax, and that the term-time address counts as the main residence for the whole course, holidays included.
- A full-time student living with someone who is not a student is not counted, which may bring the household a 25% discount, but the other adult may still be liable for the bill.
- Cardiff Council says to check whether your landlord has completed a student exemption review form. If they have, you do not need to do anything.
- If not, get a council tax certificate from the registrar at your university or college and send a copy with the council's student exemption form, as a photo or screenshot.
Sources: Cardiff Council: student exemptions (read 13 October 2026); Welsh Government: Council Tax discounts, disregards, exemptions and reductions (read 13 October 2026)
What else should a Cardiff student house set up?
Broadband, a TV Licence if anyone watches live TV or BBC iPlayer, and a plan for the weeks the house stands empty.
- Broadband: one contract for the house is usual. Agree whose name it goes in, and match the minimum term to the tenancy so nobody pays after the house moves out.
- TV Licence: GOV.UK says one licence covers the household if you have a joint tenancy agreement, but with separate tenancy agreements anyone who watches TV in their own room needs their own. A licence costs £180.
- Empty weeks: Ofgem says a standing charge is paid every day, even when you use no energy. At the South Wales Direct Debit rates, electricity and gas standing charges come to 85.37p a day, about £17.93 over a 21-day Christmas break before any energy is used.
Sources: GOV.UK: TV Licence (read 13 October 2026); Ofgem: energy price cap and standing charges explained (read 13 October 2026)
Questions about student bills in Cardiff
How much are bills per week in a Cardiff student house?
For energy alone, about £8.36 each a week between four, or £6.69 between five. That is an illustration of Ofgem's typical use for one household at South Wales Direct Debit cap rates for October to December 2026, and a shared house usually uses more. Water, broadband and a TV Licence come on top; there is no council tax if everyone is a full-time student.
Do we pay council tax if we're all students in Cardiff?
No. The Welsh Government says a home occupied only by full-time students is exempt, and the term-time address counts as your main residence through the holidays too. You still need to claim the exemption from Cardiff Council. A housemate who is not a student may have to pay, possibly with a 25% discount.
How do we claim the student council tax exemption in Cardiff?
First ask whether your landlord has sent Cardiff Council a student exemption review form; if so, you need do nothing. If not, get a council tax certificate from your university or college registrar and send a photo or screenshot of it with the council's student exemption form, with your name and Cardiff address.
Who do we pay for water in Cardiff?
Dŵr Cymru Welsh Water, unless water is included in your rent. It bills from the tenancy start date, often 1 July, to the end of the tenancy, holidays included, and offers no student discount. Up to two housemates can be named on the bill; the rest can be added as nominees.
Which energy region is Cardiff in?
Cardiff is in Ofgem's South Wales region, where National Grid Electricity Distribution runs the electricity network. For 1 October to 31 December 2026, a Direct Debit default tariff there is capped at 26.55p per kWh for electricity and 8.09p for gas. The region follows the local network, not your supplier, so switching does not change it.
Do we still pay bills over the summer in Cardiff?
Mostly, yes. Ofgem says standing charges are paid every day: at South Wales Direct Debit rates, electricity and gas together cost 85.37p a day before you use any energy. Rent and broadband usually carry on too. The Welsh Government says the council tax exemption covers the holidays too.
More help for a Cardiff student house
Water, the TV Licence, empty weeks and the energy price cap, in more depth.
Start here
Do students pay water bills?
RecommendedWater rules for students in England, Wales, Scotland and Northern Ireland.
TV Licence when you move in
When a shared house needs one licence, and how to transfer, refund or cancel.
Bills in an empty student house
What keeps charging over Christmas and summer, and how to split it fairly.
UK energy price cap: rates, history and the next cap
The national cap, the rates behind it and when Ofgem next changes it.
Student bills in other cities
Energy region, water company and council tax for 20 university cities.
Taupia for student houses
How a student house sets up and splits its bills in one place.
Keep your Cardiff house's bills in one place
Taupia monitors the house's bills, compares and switches energy, broadband and mobile once the household approves, and splits each bill and tracks who has paid. It moves no money, does not set up council tax or switch water, and it is free.