What Is PCAF?
PCAF (Partnership for Carbon Accounting Financials) was launched in 2015 by a group of Dutch financial institutions. With a founding vision to create a common language and methodology across financial institutions — enabling consistent calculation and reporting of the emissions financed through loans and investments — PCAF has quickly grown into a global partnership in the years since.
PCAF now works with more than 600 financial institutions and adds more participants every year.
PCAF serves as a sustainability standard for the financial sector. Put simply, when a bank or fund manager wants to calculate and disclose the emissions of the companies in its portfolio, it can use the methods defined by PCAF. This simplifies comparison and reporting across different institutions, giving regulators a clear view of the financial sector's carbon balance sheet.
Why PCAF Matters
Today, carbon management has become a critical issue in the financial sector, just as in many other industries. PCAF is an initiative that lets institutions like banks, insurers, and asset managers measure and report the greenhouse gas emissions generated by the projects and investments they finance in a consistent way.
While financial institutions' direct carbon emissions (such as energy used in their buildings) make up only a small portion of their total emissions, the emissions of the companies they finance through loans and investments are far larger. According to one study, the financed emissions of global banks are more than 700 times larger than their own operational emissions. For this reason, banks and asset managers need standards like PCAF to properly manage their actual environmental impact.
By adding transparency to this large financial greenhouse gas pool, PCAF makes risk management and strategic planning easier. For example, banks like ABN AMRO have used PCAF to calculate the carbon impact of their mortgage portfolios. When it became clear that mortgages had the highest carbon impact, they began promoting new lending products that support energy efficiency. This both expanded their portfolios and contributed to climate goals.
How Does PCAF Work? (Methodology and Measurement Principles)
At the heart of PCAF is the Financed Emissions Standard (Part A). This standard explains in detail how banks should calculate emissions across seven core asset classes (bonds, loans, project finance, commercial real estate, mortgages, motor vehicle loans, etc.). The core principle: a bank or fund is responsible for the carbon emissions of a company it finances in proportion to the financing it provides. So if a company produces 100 tons of emissions and the bank provides 40% of its investment, the bank's carbon account is charged with 40 tons. This approach fairly distributes emissions based on financial share.
In practice, PCAF recommends the following steps:
- First, define the internal portfolio (which loan and investment types will be included).
- Next, collect data: obtain emission datasets from borrower companies; if data isn't available, use industry averages or estimates based on financial size. PCAF recommends assigning each data source a quality score from 1 to 5. Using high-quality (1-2) data in reporting is more reliable.
- Then calculate emissions using PCAF guidance and produce a portfolio total. Banks typically report these figures under "Category 15: Investments" of Scope 3 in the GHG Protocol (PCAF is based on Scope 3).
- Calculated emissions are shared with the public and regulators through annual sustainability reports or TCFD/SBTi disclosures.
The PCAF Data Scoring System
When financial institutions assess the carbon footprint of their loan and investment portfolios, they use a dedicated scoring method developed for this purpose.
Scores range from 1 to 5:
Score 1 – Very high accuracy: Offers the highest level of transparency. Data sources are fully reliable, and the methods and assumptions used in the calculation are fully disclosed.
Score 2 – High accuracy: Based on data from robust and reliable sources. Methods and assumptions are presented clearly and comprehensively.
Score 3 – Medium accuracy: Data is reliable at an acceptable level. Calculation logic and assumptions are largely shared.
Score 4 – Medium-low accuracy: Based on more reliable sources, but still contains uncertainties and gaps. Some method disclosures have been provided.
Score 5 – Low accuracy: The data used is unreliable or contains significant gaps. Calculation methods and assumptions are not sufficiently clear.
PCAF's methodology is designed to align with other frameworks such as the Task Force on Climate-related Financial Disclosures (TCFD) and Science Based Targets initiative (SBTi). For example, TCFD reporting requires financial institutions to disclose finance-related risks — PCAF makes this concrete. The emission data produced can also be shared in international reports such as CDP. Through this, PCAF helps financial institutions prepare for regulations while also developing green finance strategies.
Benefits of PCAF for the Financial Sector
There are several benefits for financial institutions that implement PCAF:
Risk Management
By identifying the largest sources of emissions in the portfolio, institutions can take climate-risk-sensitive actions. For example, risk can be reduced by lowering lending in high-carbon sectors or defining conditional loans. PCAF produces results aligned with the requirements of the Corporate Sustainability Reporting Directive (CSRD) and TCFD.
Regulatory Readiness
Carbon reporting requirements are growing for the financial sector in Europe and around the world. PCAF offers a transparent, technical framework that prepares institutions for these regulations. Integrating PCAF data into existing governance and internal audit processes protects institutions when transactions are later scrutinized.
Reporting and Reputation
The 600+ financial institutions that are members of PCAF (banks, insurers, asset managers, etc.) disclose their calculations. Investors and the public can track their climate performance. Transparent reporting attracts new investors and provides an edge in accessing sustainable funds. For example, large funds reporting to CDP are channeling financing toward more environmentally friendly companies.
Investment Decisions
PCAF data makes it easier to measure the carbon footprint of investment portfolios. Institutions can rebalance their portfolios around net zero targets. Internal 'carbon price' calculations can also be linked to PCAF outputs, making it possible to increase the financing cost of high-emission investments.
Innovation
Institutions that obtain emission data can develop new financial products such as green bonds and carbon credits. For example, ABBank, after its PCAF calculations, offered special lending packages for energy-efficient building projects.
Common Challenges
In practice, the biggest challenges are data gaps and accuracy. Collecting emission data from borrower companies is difficult; many do not provide it or keep reporting up to date. In these cases, banks use estimates based on industry averages or financial size. The data quality scoring recommended by PCAF lets banks indicate which data is reliable.
In addition, implementing PCAF requires coordination across business units: risk management, sustainability, accounting, and IT teams must work together. Internal governance and training become essential.
Finally, emission factors from different sources can be inconsistent; PCAF's continuously updated methodology (for example, the inclusion of sovereign debt loans) aims to reduce these inconsistencies.
Practical Tips for Implementing PCAF
Prioritization: Rather than covering all activities at once, start with the portfolio components generating the highest carbon emissions. Energy, transportation, and raw materials sectors are typically priority areas. At this stage, you can split your portfolio into a few categories to make measurement more manageable.
Data Strategy: Ask your borrower companies for annual emission reports. If you can't obtain them, you can use the industry averages PCAF publishes. For example, you can calculate tCO2 based on an energy company's electricity generation figures. Use PCAF's data quality score (1-5) system to document the accuracy of your data.
Tools and Resources: Leverage open-source calculation tools (such as the PCAF Emissions Library) or commercial carbon accounting platforms. These tools automate calculations based on financing share. Also download PCAF's own "Disclosure Checklist" — as of 2025, new members' reports are reviewed against this checklist.
Internal Communication: Share results not only in sustainability reports, but also regularly with the board and business unit heads. Tie the importance of financed emissions back to company strategy. This ensures lending policies are aligned with carbon goals and the entire organization pulls in the same direction.
Target Setting: Once measurements are in place, set concrete reduction targets. For example, define clear metrics such as reducing portfolio carbon intensity by X% per year or reaching a net zero lending book by a given date. Plan to collaborate with customers to achieve these goals (offering green bonds, incentivizing low-carbon investments, etc.). PCAF measurements can be used directly for SBTi-aligned target setting.
In Conclusion: PCAF...
In short, PCAF is a powerful first step for financial institutions. Measuring financed emissions helps you manage risk, meet regulations, and earn investor confidence.
To get started: identify the carbon-intensive sectors in your portfolio and begin measuring in line with PCAF guidance.
CarbonSmart and PCAF
At CarbonSmart, we support the financial sector with our PCAF module.
With the module integrated into our Corporate Carbon Footprint Management Platform, you can perform PCAF calculations quickly and systematically — and combine your calculations with your corporate carbon footprint data to publish comprehensive reports!
