Technical assistance on Climate Budgeting and Budget Climate Assessment (2026-2027)

Request for Proposal (RfP)
Technical assistance on Climate Budgeting and
Budget Climate Assessment (2026-2027)
C40 Cities Climate Leadership Group, Inc.
120 Park Avenue, 23rd Floor
New York, NY 10017
United States of America
09/06/2026

Contents
1. C40 Cities Climate Leadership Group Inc. 1
2. Summary, purpose and background of the project 1
3. Proposal guidelines 2
4. RfP and project timeline 4
5. Proposal evaluation criteria 6
6. Project budget 7
7. C40 policies 8
8. Submissions 8
1. C40 Cities Climate Leadership Group Inc.
C40 is a network of nearly 100 mayors of the world’s leading cities working to deliver the urgent action
needed right now to confront the climate crisis and create a future where everyone, everywhere, can thrive.
Mayors of C40 cities are committed to using a science-based and people-focused approach to limit global
heating in line with the Paris Agreement and build healthy, equitable and resilient communities. We work
alongside a broad coalition of representatives from labour, business, the youth climate movement and civil
society to support mayors to halve emissions by 2030 and help phase out fossil use while increasing urban
climate resilience and equity.
The current co-chairs of C40 are Mayor Sadiq Khan of London, United Kingdom, and Mayor Yvonne
Aki-Sawyerr of Freetown, Sierra Leone; three-term Mayor of New York City Michael R. Bloomberg serves as
President of the Board. C40’s work is made possible by our two strategic funders: Bloomberg
Philanthropies and Realdania.
To learn more about the work of C40 and our cities, please visit our website or follow us on X, Instagram,
Facebook and LinkedIn.
2. Summary, purpose and background of the project
The Brazil Program “Mutirão” is a strategic partnership between C40 Cities and the Global Covenant of
Mayors (GCoM) to accelerate the implementation of climate action across Brazilian cities. The program
aims to unlock delivery at scale by identifying and preparing high-impact, finance-ready urban climate
projects while strengthening the institutional frameworks that support long-term transformation. It
combines on-the-ground implementation with targeted support to federal and multilevel governance,
leveraging Brazil’s growing climate ambition and the opportunity presented by COP30 in Belém. One of the
key components from the Brazil Program “Mutirão” is Climate Budgeting.
Climate Budgeting is a governance system that mainstreams climate commitments and considerations
into decision-making on policies, actions and budget through integrating climate goals and targets in the
Request for Proposals: Technical assistance on Climate Budgeting and Budget Climate Assessment 1

financial budget process and assigning responsibility for implementation, monitoring, evaluation and
reporting across the government.
As part of the Brazil Program “Mutirão”, C40 will support 7 Brazilian cities in implementing or improving
their climate budget by 2027: 4 beginner cities implementing climate budgeting for the first time
(Salvador, Fortaleza, Curitiba, and Recife), and 3 cities already in progress with climate budgeting
implementation (Rio de Janeiro, São Paulo, and Campinas). These efforts aim to deepen and sustain
city-level engagement on climate action by supporting both strategic leadership and technical
implementation. This dual-track approach leverages political momentum needed to deliver on climate goals
through strengthening internal systems via climate budgeting. Additionally, climate budgeting can serve as
a bridge to climate justice, ensuring that financial decisions translate into equitable climate action.
To support climate budgeting implementation across these seven cities, C40 will provide technical
guidance on their Budget Climate Assessment (BCA) process. BCA is a form of climate budget evaluation
used to analyze the city's budget through a climate lens. It evaluates specific budget lines to determine
their potential impact on climate change mitigation and/or adaptation, to reveal areas that may be
responsible for significant emissions and/or impacting the city’s resilience to climate change. To be part of
climate budgeting efforts, the BCA process must be embedded within the budgetary decision-making
processes and official budgetary guidelines, instructions and documents. This analysis requires a
whole-of-government approach to gather data from all relevant departments and evaluate the climate
impact of specific budget lines, and contribute to inform city progress toward their Climate Action Plan
(CAP) targets.
In this context, C40 seeks technical assistance (TA) to support cities in their Budget Climate Assessment
(BCA) process.

The objective of this TA is to assist cities on their BCAs to support the Climate Budgeting
implementation process. Unlike a traditional climate spend analysis, the BCA under this scope must be
designed as a practical assessment tool to provide the data and methodology baseline necessary to
mainstream climate targets into