Outcome Delivery Incentives (ODI) for 2024-25 – Final determinations

On 13 November 2025 we published our outcome delivery incentives (ODI) final determinations for 2024-25. The ODI final determinations for 2024-25 set out how we propose to adjust companies’ PR24 price controls to account for the difference between: 

  • companies’ actual performance against their in-period and end of period performance commitments in 2024-25; and 
  • forecast performance on these performance commitments included in their PR24 final determinations. 

The ODI final determinations do not cover the wider adjustments to companies’ price controls for the other PR19 reconciliation mechanisms or the correction of PR24 unambiguous errors (other than those relating to ODIs). While there is no specified date by which we must complete these other elements of the PR19 blind year process, we aim to publish them no later than 15 December 2025. 

In making our ODI final determinations, we considered stakeholder responses to our draft determinations, published on 2 October 2025, and other relevant information, including the CMA’s provisional redetermination of our PR24 determinations (to the extent it is relevant to this process). 

Documents

Below are the sector summary and company specific documents setting out our ODI final determinations for each of the companies to whom they apply.

Company 

Final determination 

Sector overview  Sector overview – ODI final determination 2024-25 (revised 18 November 2025)
Affinity Water  Affinity Water – ODI final determination 2024-25
Anglian Water  Anglian Water – ODI final determination 2024-25
Dwr Cymru  Dŵr Cymru – ODI final determination 2024-25
Hafren Dyfrdwy  Hafren Dyfrdwy – ODI final determination 2024-25
Northumbrian Water  Northumbrian Water – ODI final determination 2024-25
Portsmouth Water  Portsmouth Water – ODI final determination 2024-25
SES Water  SES Water – ODI final determination 2024-25
Severn Trent Water  Severn Trent Water – ODI final determination 2024-25
South East Water  South East Water – ODI final determination 2024-25
South Staffs Water  South Staffs Water – ODI final determination 2024-25
South West Water  South West Water – ODI final determination 2024-25
Southern Water  Southern Water – ODI final determination 2024-25
Thames Water  Thames Water – ODI final determination 2024-25
United Utilities  United Utilities – ODI final determination 2024-25
Wessex Water  Wessex Water – ODI final determination 2024-25 (revised 18 November 2025)
Yorkshire Water  Yorkshire Water – ODI final determination 2024-25

Price control deliverables (PCDs)

Alongside our draft determinations, we publish an updated version of ourPR19 ODI PCDs (republished on 13 November 2025 with blind year ODI final determinations). This version supersedes the version of PR19 ODI PCDs published with our PR24 draft determinations. 

Models

The ODI reconciliation uses a suite of models, which reflect the reconciliation mechanism put in place for the 2020-25 price control period. Below we’ve set out the models we have used to set companies’ ODIs final determination.   

For optimal viewing, please download and open files using Microsoft Excel rather than in your web browser.  

Company specific models

Company

ODI performance for 2024-25

ODI BYR difference

2024-25 In-period adjustments model

Affinity Water ODI performance for 2024-25 – Affinity Water ODI BYR difference – Affinity Water 2024-25 In-period adjustments model – Affinity Water
Anglian Water ODI performance for 2024-25 – Anglian Water ODI BYR difference – Anglian Water 2024-25 In-period adjustments model – Anglian Water
Bristol Water ODI performance for 2024-25 – Bristol Water ODI BYR difference – Bristol Water
Dŵr Cymru ODI performance for 2024-25 – Dŵr Cymru ODI BYR difference – Dŵr Cymru 2024-25 In-period adjustments model – Dŵr Cymru
Hafren Dyfrdwy ODI performance for 2024-25 – Hafren Dyfrdwy ODI BYR difference – Hafren Dyfrdwy 2024-25 In-period adjustments model – Hafren Dyfrdwy
Northumbrian Water ODI performance for 2024-25 – Northumbrian Water ODI BYR difference – Northumbrian Water 2024-25 In-period adjustments model – Northumbrian Water
Portsmouth Water ODI performance for 2024-25 – Portsmouth Water ODI BYR difference – Portsmouth Water 2024-25 In-period adjustments model – Portsmouth Water
SES Water ODI performance for 2024-25 – SES Water ODI BYR difference – SES Water 2024-25 In-period adjustments model – SES Water
Severn Trent Water ODI performance for 2024-25 – Severn Trent Water ODI BYR difference – Severn Trent Water 2024-25 In-period adjustments model – Severn Trent Water
South East Water ODI performance for 2024-25 – South East Water ODI BYR difference – South East Water 2024-25 In-period adjustments model – South East Water
South Staffs Water ODI performance for 2024-25 – South Staffs Water ODI BYR difference – South Staffs Water 2024-25 In-period adjustments model – South Staffs Water
South West Water ODI performance for 2024-25 – South West Water ODI BYR difference – South West Water 2024-25 In-period adjustments model – South West Water
Southern Water ODI performance for 2024-25 – Southern Water ODI BYR difference – Southern Water 2024-25 In-period adjustments model – Southern Water
Thames Water ODI performance for 2024-25 – Thames Water ODI BYR difference – Thames Water 2024-25 In-period adjustments model – Thames Water
United Utilities ODI performance for 2024-25 – United Utilities ODI BYR difference – United Utilities 2024-25 In-period adjustments model – United Utilities
Wessex Water ODI performance for 2024-25 – Wessex Water ODI BYR difference – Wessex Water 2024-25 In-period adjustments model – Wessex Water
Yorkshire Water
ODI performance for 2024-25 – Yorkshire Water ODI BYR difference – Yorkshire Water 2024-25 In-period adjustments model – Yorkshire Water

Sector models