Guidance

TAG unit A1-1 cost-benefit analysis

Transport analysis guidance (TAG) on the principles of cost-benefit analysis and how they should be applied in the context of transport appraisals.

• From: Department for Transport
• Published: 31 May 2018
• Last updated: 28 November 2024 — See all updates

Documents

TAG unit A1-1 cost-benefit analysis

PDF, 713 KB, 31 pages

TAG unit A1-1 cost-benefit analysis, including forthcoming changes for May 2025

PDF, 479 KB, 31 pages

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Forthcoming change: base year update

https://www.gov.uk/government/publications/tag-forthcoming-changes/forthcoming-change-base-year-update

Details

Assessment and evaluation of transport investments guidance including cost-benefit analysis:

• principles
• reporting

The previous version of this guidance was released in May 2023.

TAG provides information on the role of transport modelling and appraisal, and how the transport appraisal process supports the development of investment decisions to support a business case.

Published 31 May 2018
Last updated 28 November 2024 + show all updates

1. 28 November 2024

   Updated with forthcoming changes for May 2025.

2. 30 November 2023

   TAG unit A1-1 updated.

3. 31 May 2023

   TAG unit A1-1 updated.

4. 19 April 2023

   Added forthcoming change: spring 2023 data book and guidance updates.

5. 30 November 2022

   TAG unit A1-1 updated.

6. 19 October 2022

   Forthcoming changes for November 2022.

7. 30 July 2021

   Updated with new version of unit A1-1 guidance.

8. 31 May 2018

   First published.