Corporate climate reporting is undergoing its most significant structural shift in two decades. What began as a voluntary marketing exercise for progressive brands is rapidly solidifying into a highly regulated legal and financial framework. With major regulatory mandates taking effect across global jurisdictions, carbon disclosures are being integrated directly into financial reporting requirements.

At the center of this transition sits the Greenhouse Gas Protocol (GHG Protocol). Originally published in 2001, the GHG Protocol Corporate Standard remains the foundational framework for GHG accounting globally. However, to accommodate an evolving ecosystem of mandatory reporting, legal compliance, and third-party validation, the GHG Protocol Secretariat is conducting comprehensive, multi-phase technical revisions to its standards.

Within these debates, technical working groups are grappling with a frustrating, persistent real-world challenge: missing primary data. The committee’s internal debate over how companies should calculate Scope 1 & 2 emissions when physical activity data is unavailable highlights the defining tension in modern GHG accounting: what is permissible for operational feasibility versus what is required for strict auditability?

When Liters, Gallons, and kWh Are Missing

Scope 1 and Scope 2 emissions have long been considered the bedrock of corporate climate accountability. Because they represent an organization’s direct operational footprint and localized energy purchases, they are the most controllable metrics a business possesses. Unlike the vast estimation modeling required for downstream value chains (Scope 3), Scope 1 and 2 inventories are highly relied upon by investors and financial markets to drive true, apple-to-apples comparability between industry peers.

Yet, carbon management providers and sustainability consultants frequently encounter massive structural data gaps in operational reporting. Consider a corporate tenant leasing office space or a fulfillment center in a massive commercial complex. The landlord controls the building’s central infrastructure, receives the primary utility bills, and manages the natural gas line. The tenant is handed a monthly utility invoice calculated by square footage or an unmetered allocation but is gatekept from accessing the raw physical data — such as exact cubic meters of gas consumed. Alternatively, logistics networks or corporate fleets often track operations strictly through corporate fuel cards and centralized financial ledgers, missing clean, uncorrupted transaction trails of physical fuel volumes.

When primary activity data is missing, how should standard-setters respond? Should they accept financial metrics as temporary proxies to encourage participation, or enforce strict physical accounting to safeguard data integrity?

The Three Paths for GHG Accounting Under Scope 1 & 2

To resolve this issue, the GHG Protocol Secretariat presented three distinct options for the upcoming Corporate Standard revisions regarding monetary activity data and spend-based emission factors:

1. Physical Units Only: Strictly prohibiting any monetary data or spend-based calculation factors for Scope 1 & 2 inventories.
2. Convert but Prohibit Direct Spend Factors: Allowing companies to collect activity data in monetary units, but legally mandating that it be mathematically converted to physical units using local and temporal factors before a standard physical emission factor is applied.
3. The Status Quo Plus: Allowing both monetary activity data and direct spend-based emission factors to calculate Scope 1 & 2 footprints.

The Technical Working Group is overwhelmingly rejecting a total free-for-all, eliminating the possibility of using spend-based emission factors for Scope 1 & 2. However, the committee split on where to draw the final line of compromise. The majority are okay with monetary activity data if converted to physical units, favoring near-term operational feasibility. The minority view, valid nevertheless, has demanded physical units only, viewing any compromise on financial proxies as a dangerous degradation of reporting standards.

The Backlash: Why “Easy” Is a Compliance Risk

The pragmatic majority supports the financial-to-physical conversion path because it removes immediate barriers to entry for new reporters and addresses systemic gatekeeping, such as the landlord-tenant bottleneck. Prohibiting financial data entirely risks forcing organizations to omit key emission sources entirely, violating the core carbon accounting principle of completeness.

However, the opposing committee members and technical purists raised significant alarms regarding the structural vulnerabilities of using financial records as a proxy for physical emissions:

• Market and Currency Volatility: Tying a Scope 1 or 2 inventory directly to monetary inputs introduces external macroeconomic noise. If global oil prices collapse or domestic utility rates surge due to inflation, a company’s financial spend will fluctuate dramatically. On paper, their emissions inventory could change significantly year-over-year without a single molecule of greenhouse gas actually being altered in the real world.
• The “Hidden Fee” Distortion: Financial invoices are rarely clean representations of physical consumption. Bills routinely bundle infrastructure delivery fees, fixed costs, localized cess and taxes, administrative service charges, and prepaid account structures (like fuel card top-ups). These capital expenditures do not correspond to physical consumption, injecting systematic inflation into the carbon calculation.
• The Auditability Paradox: The ongoing regulatory transition from limited assurance (negative verification) to reasonable assurance (positive financial-grade validation) demands absolute data traceability. Tracing an estimated financial proxy back to its physical source is an auditing nightmare. Interestingly, some professional assurers prefer standardized secondary data tables because they can easily cross-check if a reporter used an officially published government factor. However, verifying the absolute authenticity of primary data is what actually guarantees environmental accountability.

Our View on GHG Accounting: On-Ramps for Beginners, Rigor for Leaders

The compromise being shaped by the GHG Protocol Technical Working Group is a pragmatic bridge designed to keep carbon accounting achievable for organizations with limited data maturity. However, mature corporate enterprises must not mistake an operational leeway for a permanent hall pass.

Data quality tiers (Primary vs. Secondary) are functionally meaningless unless they carry direct consequences on verification outcomes. If a large company wants a top-tier, “reasonable assurance” stamp from financial regulators and auditors, it should not be relying on financial proxies or back-end currency conversions.

Moving forward, carbon accounting strategies should separate into a clear two-track standard:

• The Relaxation Track: Converted financial metrics and secondary data quality tiers should be explicitly reserved as a temporary on-ramp for first-time reporters, small businesses, or exceptionally complex downstream supply chain nodes.
• The Rigor Track: Large, enterprise-scale organizations — and any business claiming a position of market leadership in sustainability — must get their data infrastructure in order. These entities should invest immediately in primary physical activity data pipelines, including automated utility APIs, IoT sub-metering, and strict data-sharing clauses built directly into commercial real estate leases.

Relying on financial spend to calculate direct footprints is a short-term patch for an operational infrastructure gap. True corporate decarbonization requires tracking physical reality, not financial ledgers — which is the core discipline good GHG accounting is built to enforce.