PCAF explained: how banks count financed emissions
PCAF explained: how banks, asset managers and insurers count financed emissions, what the 2025 standard covers and what readers should check.
The Partnership for Carbon Accounting Financials (PCAF) is the carbon accounting standard many financial institutions use to measure financed emissions. Its real importance is not that it gives banks another climate acronym. It moves the climate question from office electricity to the loans, investments, underwriting and insurance exposure sitting on the balance sheet.
Information only
This guide is for general information only. It is not legal, accounting, regulatory, procurement, investment or financial advice. Climate disclosure rules, accounting standards, assurance expectations, portfolio data and financial-sector policies can change. Check current official sources and professional advice before relying on this for compliance, reporting, finance, procurement or investment decisions.
The number to keep in mind is scale: PCAF now lists more than 700 signatories and more than 250 disclosures. That does not make every financed-emissions number perfect, but it shows why the standard matters. A method once used by specialist climate teams is becoming part of mainstream bank, investor and insurer reporting.
The central tension is simple. A bank can run efficient offices and still finance high-emitting activity. An asset manager can publish a net zero ambition while holding exposure to heavy industry, energy, transport and real estate. An insurer can disclose operational emissions while underwriting risks connected to fossil fuels, infrastructure, property and industrial activity.
PCAF tries to make those financed and insured emissions visible. It does not tell readers whether a bank is good or bad. It tells them where to look before accepting a climate claim.
Core test
PCAF is useful when it turns financial-sector climate language into a measurable portfolio question. The reader test is not only "does the bank report financed emissions?" It is "what activities are covered, how much is estimated, what data quality score is disclosed and what changed year on year?"
Quick answer
| Question | Short answer |
|---|---|
| What is PCAF? | The Partnership for Carbon Accounting Financials is an industry-led initiative and accounting standard for measuring greenhouse gas emissions associated with financial activities. |
| What are financed emissions? | Emissions attributed to loans and investments, usually treated as Scope 3 Category 15 emissions for the reporting financial institution. |
| Who uses it? | Banks, asset owners, asset managers, development banks, insurers and other financial institutions that need a method for portfolio emissions disclosure. |
| Does PCAF prove a net zero strategy is credible? | No. It provides a measurement method. Strategy, targets, capital allocation, stewardship, exclusions, transition finance and assurance need separate judgement. |
| What changed recently? | PCAF's Part A financed-emissions standard has a third edition dated December 2025, with expanded methodologies and reporting recommendations. |
Data checked
This article was checked on 20 June 2026 against PCAF's standard page, PCAF Part A Financed Emissions third edition, PCAF Part B and Part C pages, GHG Protocol's Corporate Value Chain Scope 3 Standard page and IFRS Foundation material on International Financial Reporting Standard S2 (IFRS S2) Climate-related Disclosures.
What PCAF is
PCAF is the Partnership for Carbon Accounting Financials. It was created to harmonise how financial institutions measure and disclose greenhouse gas emissions connected to their financial activities.
That phrase, "financial activities", is the key. For an ordinary company, the most visible emissions questions may be factories, electricity, logistics and suppliers. For a bank or asset manager, the larger climate exposure often sits in lending, investment portfolios, capital markets activity and insurance underwriting.
The PCAF standard gives financial institutions a common method for attributing part of a client, issuer, project, property or asset's emissions to the financial institution that finances it. In plain English: if a bank helps fund an emitting asset, PCAF asks how much of that asset's emissions should be linked to the bank's portfolio.
That makes PCAF part of the wider GHG Protocol system. PCAF's financed-emissions standard supplements the GHG Protocol Corporate Value Chain Scope 3 Standard, especially Category 15, investments. The first edition was reviewed by GHG Protocol, while PCAF notes that later additions and new 2025 methodologies have not been reviewed because GHG Protocol closed its Built on GHG Protocol review service.
Why financed emissions matter
Financial institutions are unusual climate actors because their most important emissions are often indirect. A bank's own offices, electricity and business travel matter, but they may be small compared with emissions linked to corporate loans, project finance, mortgages, listed equity, bonds, motor vehicle loans or sovereign debt.
PCAF's Part A standard says greenhouse gas emissions of financial activities, or Scope 3 Category 15 emissions, are the largest portion of financial institutions' overall emissions. That is the reason financed emissions have become so important to climate reporting, risk management and target-setting.
The practical implication is uncomfortable but useful. If a bank reports a polished operational footprint while avoiding the carbon intensity of its loan book, the reader is missing the main climate exposure. If an investment fund says it supports transition but gives no portfolio-emissions method, the claim is hard to test. If an insurer talks about climate risk without explaining insurance-associated emissions, the reader may not know how underwriting exposure is being treated.
PCAF does not solve every part of that problem. It does create a more disciplined starting point.
The PCAF standard in three parts
PCAF is not only one financed-emissions document. The standard is organised into three parts, each aimed at a different kind of financial-sector activity.
| PCAF part | What it covers | Reader question |
|---|---|---|
| Part A: financed emissions | Loans and investments, including asset classes such as listed equity, corporate bonds, business loans, project finance, commercial real estate, mortgages, motor vehicle loans and methods added over time. | How much of client, issuer, project or asset emissions is attributed to the financial institution? |
| Part B: facilitated emissions | Capital markets facilitation, such as underwriting and arranging transactions where the institution helps raise capital but may not hold the asset in the same way as a lender or investor. | Does the institution disclose emissions linked to deals it facilitates, not only assets it holds? |
| Part C: insurance-associated emissions | Emissions associated with reinsurance and insurance underwriting. | Does the insurer explain emissions exposure connected to underwriting activity, not only its own operations? |
This structure matters because it stops one kind of financial activity from standing in for the whole institution. A bank with a large advisory franchise, a lender with a heavy real-estate book and an insurer with industrial underwriting exposure may all need different PCAF lenses.
How a financed-emissions calculation works
The basic idea is attribution. PCAF does not usually say a financial institution owns all of a company's emissions. It asks what share should be attributed to the financial institution based on the financing relationship.
| Piece | Plain English meaning | Why it can be difficult |
|---|---|---|
| Borrower or asset emissions | The emissions of the company, project, property, vehicle, sovereign or other financed asset. | The underlying emissions number may be reported, estimated, incomplete, unaudited or missing Scope 3 data. |
| Attribution factor | The share of that emissions number attributed to the financial institution. | The method differs by asset class and can depend on company value, debt, equity, project finance, property value or other denominators. |
| Portfolio aggregation | The institution adds attributed emissions across an asset class, sector or portfolio. | Changes can reflect real emissions cuts, portfolio growth, valuation changes, data improvements or methodology changes. |
This is why a financed-emissions figure should never be read as a single moral score. It is an accounting result built from boundaries, attribution factors, data quality and portfolio composition.
Data quality is the hinge
The most important part of a PCAF disclosure may not be the headline emissions number. It may be the data quality behind it.
A financial institution can have a large emissions figure because it holds high-emitting assets, because it uses broader boundaries, because it has better data, or because it covers more Scope 3 emissions than a peer. A lower figure can mean progress, but it can also mean exclusions, estimates, sector mix or narrower coverage.
| Disclosure feature | Strong signal | Weak signal |
|---|---|---|
| Coverage | The institution explains which asset classes, sectors, geographies and scopes are included and excluded. | A portfolio number appears without a clear boundary. |
| Data quality | The disclosure separates reported data, physical estimates, economic estimates and proxy data. | Estimated and reported emissions are blended together without explanation. |
| Year-on-year movement | The institution explains whether changes come from real emissions reductions, portfolio activity, data updates, inflation, valuation or methodology. | A fall in emissions is presented as progress without a movement bridge. |
| Scope 3 treatment | The disclosure says when client Scope 3 emissions are included, excluded or estimated. | The institution uses "portfolio carbon" language without saying which scopes are counted. |
| Use of carbon credits | Absolute emissions are shown separately from carbon credits, removals or avoided-emissions claims. | Offsets or avoided emissions are used to blur the gross financed-emissions picture. |
The stronger disclosure does not pretend the data is perfect. It shows where the data is strong, where it is estimated and how the institution plans to improve it.
PCAF vs GHG Protocol, ISSB and CDP
PCAF sits inside a wider disclosure landscape. It is easiest to understand if you separate measurement, disclosure and judgement.
| System | Main role | How it connects to PCAF |
|---|---|---|
| GHG Protocol | Corporate greenhouse gas accounting standards, including Scope 3 Category 15 investments. | PCAF gives financial institutions more detailed methods for financed emissions under the broader GHG Protocol architecture. |
| International Sustainability Standards Board (ISSB) | Investor-focused sustainability disclosure standards, including International Financial Reporting Standard S2 (IFRS S2) climate disclosures. | ISSB-style climate disclosure can ask for emissions, risks and metrics that depend on robust financial-sector carbon accounting. |
| CDP, formerly Carbon Disclosure Project | Environmental disclosure platform and scoring system used by investors, customers and companies. | Financial institutions may use PCAF-aligned data to answer emissions and portfolio-exposure questions. |
| Science Based Targets initiative (SBTi) | Target-setting and validation criteria. | Targets need emissions baselines and coverage decisions, but target credibility is separate from the PCAF measurement method. |
| European Sustainability Reporting Standards (ESRS) | European Union sustainability reporting standards used under the Corporate Sustainability Reporting Directive. | Financial-sector climate disclosures may need portfolio emissions, risk metrics and transition-plan evidence that overlap with PCAF concepts. |
The mistake is to treat one acronym as a substitute for the others. PCAF helps count portfolio emissions. GHG Protocol supplies the wider accounting frame. International Sustainability Standards Board (ISSB) and European Sustainability Reporting Standards (ESRS) shape disclosure requirements. CDP (formerly Carbon Disclosure Project) collects disclosure. Science Based Targets initiative (SBTi) assesses targets. None of those jobs is identical.
What PCAF does not prove
A PCAF-aligned disclosure is not the same as a credible transition plan. It does not prove a bank will reduce fossil-fuel exposure. It does not prove a fund has a better climate strategy than a peer. It does not prove underwriting policy is aligned with a 1.5C pathway. It does not prove the data has been assured.
That is not a criticism of PCAF. It is a boundary. Measurement is necessary, but it is not the whole judgement.
- Which sectors and asset classes are driving the financed-emissions number?
- Does the institution disclose absolute emissions as well as intensity metrics?
- Does the number fall because financed companies reduce emissions or because the portfolio changes?
- Do high-emitting clients have credible transition plans?
- How do new lending, underwriting or investment decisions use the data?
- Are offsets, avoided emissions or removals reported separately from gross emissions?
- Does the institution explain data quality and restatements?
How to read a bank or fund disclosure
A useful PCAF disclosure should let a reader move from headline number to portfolio decision. The best disclosures usually show absolute financed emissions, emissions intensity, asset-class coverage, sector concentration, data quality and a movement explanation.
For a bank, look at the lending book. Which sectors dominate financed emissions? How are power, oil and gas, steel, cement, transport, real estate and agriculture treated? Are new loans assessed differently from existing exposure? Does the bank explain client transition-plan expectations?
For an asset manager or pension provider, look at holdings and benchmark structure. A fund can reduce reported carbon intensity by holding fewer heavy industrial companies, but that may not show whether it is financing real-world transition. Stewardship, voting, engagement escalation and portfolio turnover matter alongside PCAF-style metrics.
For insurers, look for underwriting boundaries. Operational emissions are not enough. The harder question is whether underwriting exposure, insured sectors, risk selection and climate-policy exclusions are discussed in a way that readers can test.
Common mistakes
| Mistake | Why it matters | Better reading |
|---|---|---|
| Treating PCAF as a green label | PCAF is an accounting method, not an approval mark. | Use it to inspect the emissions boundary and data quality. |
| Comparing banks without checking coverage | Two institutions may include different asset classes, sectors or scopes. | Compare like with like only where boundaries and methods are clear. |
| Assuming lower emissions always means progress | Portfolio sales, valuation changes and data updates can move the number. | Look for a movement bridge and sector-level explanation. |
| Ignoring facilitated or insured emissions | Capital markets activity and underwriting may be material for some institutions. | Check whether Parts B and C are relevant to the business model. |
| Mixing gross emissions with offsets | Carbon credits do not erase the need to disclose absolute financed emissions. | Read gross emissions, removals, credits and avoided emissions separately. |
The bottom line
PCAF matters because it makes financial-sector climate exposure harder to hide behind operational footprints. It asks banks, investors and insurers to show the carbon consequences of what they finance, facilitate and underwrite.
But the useful judgement is not "PCAF equals good". The useful judgement is whether the disclosure is complete enough, transparent enough and connected enough to decisions. A strong financed-emissions report should help readers see where the emissions sit, how reliable the data is and whether the institution is using the information to manage risk and transition, not just to fill a sustainability page.
What to watch next
The main signals are new PCAF standard editions, GHG Protocol updates to Scope 3 investment guidance, ISSB adoption changes in financial-sector disclosure practice, and material changes in how major banks, asset managers or insurers disclose financed, facilitated or insurance-associated emissions.
FAQ
What does PCAF stand for?
PCAF stands for Partnership for Carbon Accounting Financials. It is a financial-sector greenhouse gas accounting initiative and standard.
Are financed emissions the same as Scope 3?
For a financial institution, financed emissions are generally treated as Scope 3 Category 15 emissions under the GHG Protocol framework. They are a specific kind of value-chain emissions linked to loans and investments.
Does PCAF cover insurance?
Yes, PCAF has a separate Part C for insurance-associated emissions. That is different from Part A financed emissions for loans and investments.
Does using PCAF mean a bank is aligned with net zero?
No. PCAF helps measure and disclose portfolio emissions. Net zero alignment depends on targets, implementation, sector policy, client transition plans, capital allocation, stewardship, assurance and actual emissions movement.
Why can financed-emissions numbers change even without real-world emissions falling?
They can change because of portfolio growth, asset sales, valuation shifts, data-quality updates, new emissions factors, methodology changes or restatements. That is why movement explanations are important.