ICAEW.com works better with JavaScript enabled.

Case studies: Accounting for scope 3 emissions in financial services

Support for those in financial services to help understand how to calculate Scope 3, Category 15 emissions across the industry and different asset classes from loans to the oil and gas sector to insuring aviation firms.

At-a-glance support

The following case-studies offer support to preparers and assurers working within financial services understand estimation methodologies for Scope 3 emissions across different asset classes and client industries. We also outline common challenges and potential options for mitigation.

The aim to increase transparency of approach for financial services firms preparing climate transition plans under the UK’s Transition Plan Taskforce’s Disclosure Framework. Given this is a quickly evolving space, these case studies are not technical guidance.

Two chimneys billowing smoke
Support

10 common challenges in accounting for Scope 3 emissions

  • Helpsheets and support
  • 15 Jun 2026
Guidance for CFOs and audit committees on the common challenges when reporting and assuring scope 3 greenhouse gas emissions within the financial services sector.
Read more

Estimation methodologies

Case study
Modern build houses
Banking - retail

Support for those in the banking sector on how to approach the reporting and assurance of Scope 3 emissions in relation to residential mortgages.

Case studies
Lorry on motorway
Banking - corporate

Support for those in the banking sector on how to approach the reporting and assurance of Scope 3 emissions looking at where lending falls within the asset class ‘business loans and unlisted equity’. Case studies focus on three carbon intensive sectors.

Case study
Skyscrapers viewed from below
Banking - corporate investment

Support for those in the banking sector on how to approach the reporting and assurance of Scope 3 emissions looking at corporate bond issuances.

Case study
Elderly gentleman playing with grandson
Insurance - life

Support for those in the insurance sector on how to approach the reporting and assurance of Scope 3 greenhouse gas emissions relating to life insurance.

Case studies
Aircraft in flight
Insurance - non life

Support for those in the insurance sector on how to approach the reporting and assurance of Scope 3 emissions looking at insurance associate emissions for commercial and professional lines, and facilitated emissions across sovereign debt.

Case study
Glasgow skyline
Asset management

Support for those in the banking sector on how to approach the reporting and assurance of Scope 3 emissions related to asset management.