In our PR24 final methodology, we said we would have an early cost adjustment claim submission and publication in summer 2023. The aim is to provide companies with an opportunity to comment on other companies proposed cost adjustment claims alongside their PR24 business plans.
We publish water companies’ cost adjustment claims below, which were submitted to us on 9 June 2023.
We also publish a summary excel file, which summarises the details of each cost adjustment claim and includes references to the relevant evidence file(s).
Cost Adjustment Claims Summary
| File | Date of release |
| Symmetrical CACs summary | June 2023 |
| CACs Summary – August 2023 | August 2023 |
Affinity Water Cost Adjustment Claims (CAC)
| File | Date of release |
| PR24 Cost Adjustment Claim Submission – Regional Wages | June 2023 |
| CAC calculations – 2022-23 prices | June 2023 |
| CAC Regional Wages Supporting File – May 2023 | June 2023 |
| EI report – population transience and retail costs | June 2023 |
Anglian Water Cost Adjustment Claims (CAC)
| File | Date of release |
| CAC_1.1_APH | June 2023 |
| CAC_1.2 – APH | June 2023 |
| CAC_2.1 – Lack of large works | June 2023 |
| CAC_2.2 – Lack of large works | June 2023 |
| CAC_2.3 – Lack of large works | June 2023 |
| CAC_2.4 – Economies of scale in large works white paper | June 2023 |
| CAC_5.1 – Leakage | June 2023 |
| CAC_5.2 – Leakage regression results | June 2023 |
| CAC_6.1 – Boundary box replacements | June 2023 |
| CAC_6.2 – Meter penetration analysis | June 2023 |
| CAC_6.3 – Boundary Box Failure Analysis | June 2023 |
| CAC_3.1 Energy CAC | August 2023 |
| CAC_4.1 – Phosphorus removal | August 2023 |
Hafren Dyfrdwy Cost Adjustment Claims
| File | Date of release |
| Cost Adjustment Claims June 2023 | June 2023 |
| Claims Calculations | June 2023 |
| Energy CAC | August 2023 |
Portsmouth Water Cost Adjustment Claims
| File | Date of release |
| CAC early submission – CAC1 – lumpy maintenance | June 2023 |
| CAC early submission – CAC2 – replacement head office building | June 2023 |
SES Water Cost Adjustment Claims
| File | Date of release |
| Early CAC_Pumping | June 2023 |
| Early CAC_Retail Scale | June 2023 |
| Early CAC_Softening | June 2023 |
Severn Trent Water Cost Adjustment Claims
| File | Date of release |
| Cost Adjustment Claims | June 2023 |
| Network Complexity Calculations | June 2023 |
| Arup STW Growth Calculations | June 2023 |
| STW Growth If Modelled Calculations | June 2023 |
| CAC – Energy costs and Phosphorus consent | August 2023 |
South East Water Cost Adjustment Claims
| File | Date of release |
| Oxera Review of PR24 cost adjustment claims | June 2023 |
South Staffs Water Cost Adjustment Claims
| File | Date of release |
| SSC topography cost adjustment claim | June 2023 |
South West Water and Bristol Water Cost Adjustment Claims
| File | Date of release |
| Cost adjustment claim initial submission | June 2023 |
| CAC liming methodology 1 updated | June 2023 |
| CAC liming methodology 2 updated | June 2023 |
Southern Water Cost Adjustment Claims
| File | Date of release |
| Cost Adjustment Claim – Coastal Population | June 2023 |
| Cost Adjustment Claim – Meter Replacement | June 2023 |
| Cost Adjustment Claim – Regional Labour Costs | June 2023 |
| Cost Adjustment Claim – Wastewater Growth | June 2023 |
| Cost Adjustment Claim – Bioresources AAD (For submission) | August 2023 |
| Cost Adjustment Claim – Coastal Population – update | August 2023 |
Thames Water Cost Adjustment Claims
| File | Date of release |
| Cost Adjustment Claim | June 2023 |
| CAC calculations – 2022-23 prices | June 2023 |
| CAC – Mains replacement | August 2023 |
United Utilities Cost Adjustment Claims
| File | Date of release |
| CAC 001 – Reservoirs Dam Maintenance Cost Adjustment Claim | June 2023 |
| CAC_002 – Drainage Cost Adjustment Claim | June 2023 |
| CAC_003 – Ongoing Phosphorus Removal Opex | August 2023 |
| CAC_004 – Industrial Emissions Directive Compliance | August 2023 |
| CAC_005 – New Waste Permit Obligations | August 2023 |
Wessex Water Cost Adjustment Claims
| File | Date of release |
| CAC3 Growth at Water Recycling Centres (WRCs) | June 2023 |
| CAC1 Increases to efficient costs over time | August 2023 |
| CAC2 Mains replacement costs | August 2023 |
| CAC4 Catchment and nature-based solutions | August 2023 |
| CAC5 Industrial Emissions Directive costs | August 2023 |
| CAC6 Energy costs – REDACTED | August 2023 |
Yorkshire Water Cost Adjustment Claims
| File | Date of release |
| Combined sewers CAC | June 2023 |
| Phosphorus removal | August 2023 |