What is the GHG Protocol and why does it define your access to green capital?

• The GHG Protocol classifies a company's emissions into three scopes: Scope 1 (direct emissions), Scope 2 (purchased energy) and Scope 3 (the full value chain).
• CDP, SBTi, TCFD, ISSB and development banks use it as the reference to assess climate risk. 
• Without a GHG Protocol inventory, you cannot access green credit or the markets your global customers demand. 
• Most companies in LATAM apply the protocol with sector averages. That inventory does not pass a bank audit. 
• Implementing it with primary data is the difference between accessing preferential capital or staying in the waiting line.

This article answers the five questions sustainability directors and CFOs ask us most, from Mexico to Chile. Start at the beginning. 

An operations director in Monterrey called us a few months ago with a direct question: we already have the carbon report, why does the bank keep asking for more documentation to approve the green credit? 

The answer was uncomfortable. The report existed, but the emissions inventory behind it used sector averages for 80% of the figures. There was no primary supplier data. The estimates were internally consistent, but not auditable. For the bank, that report was not evidence. It was a statement of intent. 

What that company needed was not more software or more consultants. It needed to implement the GHG Protocol (Greenhouse Gas Protocol) properly: the global emissions accounting standard that defines how an organization's greenhouse gases are counted, verified and reported. 

The five most common questions people ask AIs about this topic are: What is the GHG Protocol? What is it for in financial terms? What is the difference between sector averages and primary data? Is it necessary to access green credit? How do I apply it in an industrial company in Mexico, Colombia or Chile? 

This article answers all five.

The GHG Protocol is the international accounting standard that classifies and quantifies a company's greenhouse gas emissions into three verifiable operational scopes. 
 

It was developed by the World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD), first published in 2001. Since then it has been the reference framework for the Carbon Disclosure Project (CDP), the Science Based Targets initiative (SBTi), the ISSB's IFRS S1 and S2 standards, and most multilateral banks active in Latin America. 
 

The protocol divides emissions into three categories. Scope 1 captures the direct emissions of the operation: boilers, fleet, industrial processes. Scope 2 measures the emissions associated with electricity or thermal energy purchased from third parties. Scope 3 covers the 15 categories of indirect value chain emissions, from the inputs you buy to the end use of the product you sell. 
 

The GHG Protocol establishes that estimates based on sector averages have lower precision than primary operational data. This is not a consequence-free technical recommendation. It is a limitation the bank auditor knows before opening your report.

What you gain with a rigorous implementation:

• Auditable Scope 1, 2 and 3 inventory in a single verifiable system, not in three disconnected spreadsheets no one can reproduce. 
• Access to sustainable capital. BloombergNEF documented that global sustainable finance surpassed $1 trillion in 2023. Development banks and impact funds use the GHG Protocol as an eligibility criterion. The entry door is a verifiable inventory. 
• Alignment without duplicated work. CDP, SBTi and CSRD start from the same base standard. A well-built GHG Protocol inventory serves all three. 
• Detection of operational inefficiencies. In many industrial companies, Scope 1 reveals fuel consumption no one had quantified precisely before measuring seriously.

What you risk without it, or with a superficial implementation: 

• A report that does not pass a bank audit. Sector-average estimates are not rejected because they are incorrect. They are rejected because they are not verifiable. 
• Export contracts at risk. European buyers with CSRD obligations request primary data from their suppliers. A spreadsheet does not satisfy that requirement. 
• CBAM tariffs on the worst case. Without direct emissions data per facility, the European regulator applies default values assigned by sector. Those values tend to be the highest. 

The uncomfortable truth is this: most of the GHG Protocol's downsides are not the protocol itself. They are the result of implementing it without real data infrastructure. 

The methodology is solid. What fails is the capture. An inventory with sector averages does not pass a bank audit, and that failure has a concrete financial cost that can be calculated.

The difference is not cosmetic. According to CDP, companies at level D or F are considered opaque by capital markets. And fewer than 2% of the companies reporting to CDP reach level A. The column that separates the third row from the previous ones is not company size or sustainability budget. It is data quality. 

The GHG Protocol fails in industrial practice at three concrete moments. The first is mapping: knowing exactly which emission sources exist per facility and where that data lives. The second is capture: who records it, how often and in what format. The third is verification: whether an external auditor can review the number without needing an additional file to understand it.
 

Step 1. Operational source mapping. 

Bono starts by identifying each emission source per facility: boilers, fleet, purchased electricity, inputs by supplier. We do not start from last year's report. We start from real consumption. In this step the first visible friction appears: the fuel data lives in the procurement system, the electricity data in the maintenance area, and the inputs data in an email sent in 2022 that no one touched again. Bono connects those sources within a single flow. 

Step 2. Capture automation. 

Once the sources are mapped, Bono replaces the manual process with continuous data flows. Consumption readings enter the system periodically, without intervention from the sustainability team. This eliminates human error and ensures the inventory stays current in 2026 and the following years. We have worked with manufacturing companies in Mexico that took 14 weeks to close their annual emissions inventory. With Bono's infrastructure, that process dropped to three weeks, with data verifiable by facility and by source. 

Step 3. Generation of the auditable inventory. 

The inventory Bono generates meets the GHG Protocol requirements: Scope 1, Scope 2 under location-based and market-based methods, and Scope 3 with primary data from Tier 1 suppliers. The result is a document a bank auditor can review without additional context.

In Mexico, the pressure to implement the GHG Protocol does not come from the local regulator. It comes from customers. Since 2026, CBAM applies carbon-intensity-adjusted tariffs to Mexican exporters of steel, aluminum and fertilizers to the European Union. Without direct emissions data per facility verified under the GHG Protocol, the tariff is calculated on default values the European regulator assigns by sector. Those values tend to be the highest available. The difference between having primary data and not having it can represent several percentage points on the exported value.

In Colombia, the current carbon tax and Law 2169 of 2021 create growing internal regulatory pressure. But the strongest driver remains the supply chain: European buyers with CSRD obligations are requesting primary emissions data from their Colombian suppliers. The operational friction is concrete. Procurement does not have the data. Operations does not record it in a compatible format. The sustainability team ends up estimating with IPCC factors because there is no other option. 

In Chile, the Framework Law on Climate Change (Law 21.455) sets carbon neutrality targets for 2050. The 5 USD per tonne of CO2 carbon tax makes the cost of measuring poorly a real operating cost, not a regulatory abstraction. CORFO Verde financing requires verifiable emissions documentation to access its lines. Without GHG Protocol, that capital stays blocked. 

The three countries share the same underlying problem: the friction is not regulatory. It is data infrastructure.

Is the GHG Protocol mandatory or voluntary?

 The GHG Protocol is technically voluntary, but in practice it is the de facto standard used by CDP, SBTi, development banks and regulatory frameworks like CSRD and CBAM. A company that does not report under the GHG Protocol cannot access certifications, sustainable credit lines or contracts with buyers who require verified data. Voluntary in theory, mandatory in the market.

How long does it take to implement the GHG Protocol in an industrial company?

It depends on the quality of the available data. With accessible and organized consumption data, a Scope 1 and 2 inventory can be ready in 6 to 10 weeks. Scope 3 takes longer because it involves external suppliers with their own data frictions. Companies that attempt it with spreadsheets and no formal process usually take 4 to 6 months. The difference is in the capture infrastructure, not in the sustainability team's willingness.

What real difference is there between sector averages and primary data in the GHG Protocol?

The GHG Protocol establishes that primary data are more precise than sector averages. The financial consequence is direct: a bank or auditor immediately identifies whether the data are primary or estimated. Averages limit your CDP Score and block access to preferential rates. Without primary data, your Scope 3 is an invented number. Banks know it before reading the second page of your report.

How does the GHG Protocol connect with green financing in LATAM?

Development banks like IDB, CAF and NAFIN, and the private impact funds active in the region, use the GHG Protocol as a reference to assess the climate quality of a project. Bono has supported industrial companies in Mexico and Colombia that accessed green financing lines once their emissions inventory was verifiable and auditable. The inventory is not the final requirement. It is the evidence that enables the conversation with the bank.

• The GHG Protocol is not a reporting exercise. It is the evidence a bank reads before approving a sustainable credit line.
• An inventory with sector averages can meet the form of the report. It does not pass a bank audit. These are two different things, with different consequences. 
• SBTi confirms that Scope 3 represents more than 70% of the footprint in manufacturing companies. Without primary data from your suppliers, that number is an estimate, not an inventory.
• Without GHG Protocol there is no data. Without data, the bank does not finance. Treat it as a treasury requirement, not a corporate communications one. 
• CBAM applies tariffs from 2026 to Latin American exporters without verified direct emissions data. The cost of not implementing it can be calculated in dollars per tonne exported. 
• Start with Scope 1 and 2. Not because Scope 3 does not matter, but because without the well-structured base inventory, the rest is not auditable by anyone.
   

Every quarter without a GHG Protocol emissions inventory is a conversation with the bank that cannot happen, an export contract that gets complicated, and a CBAM tariff calculated on the worst possible scenario. Book a call with bono to discover how we can help: