Small and medium enterprises (SMEs) operate under persistent constraints: competitive markets, regulatory uncertainty, limited internal capacity, and volatile supply chains. Increasingly, they are also responding to sustainability requirements from buyers and customers. When buyers request greenhouse gas (GHG) disclosures or science-based targets through platforms such as CDP, those requests typically reflect firm expectations. In practice, when the request arrives, action is required.
Many SMEs are unsure where to begin. Developing a greenhouse gas emissions inventory is the logical starting point. A well-constructed inventory establishes a baseline that supports disclosure, target setting, and credible engagement with buyers and investors. Beginning with Scope 1 and Scope 2 emissions allows organizations to build internal capability while managing complexity. Familiarity with the Greenhouse Gas Protocol, the most widely used set of standards for corporate GHG accounting, and other commonly referenced guidance is essential to avoid rework and misalignment.
Building a GHG Inventory
A greenhouse gas inventory is a structured accounting of emissions. While business circumstances vary, the core steps are consistent:
- Set the reporting period
Select a calendar or fiscal year and ensure consistency across data sources. - Establish organizational boundaries
Determine which entities and operations are included, using an equity share or control approach. - Define operational boundaries
Identify emissions sources included in Scope 1 (direct emissions) and Scope 2 (purchased energy). - Identify and verify activity data
Locate relevant fuel, electricity, and energy-use data; confirm completeness and relevance. - Collect and clean data
Compile data from invoices, meters, and systems, resolving gaps and inconsistencies. - Apply calculation methodologies
Use appropriate emissions factors and methods consistent with the Greenhouse Gas Protocol. - Identify next steps
Document data limitations and define actions to improve data quality, disclosure readiness, and future reporting.
Organizations may undertake this work internally using established standards or engage consultants to support inventory development and, where appropriate, verification. Early attention to structure and methodology reduces downstream risk and avoids costly revisions.
Mistakes SMEs Commonly Make
Early-stage GHG reporting efforts often contain structural gaps that compromise accuracy and comparability.
- Incomplete or inconsistent data collection
Organizations often struggle to obtain reliable activity data (fuel, electricity, energy use), resulting in undocumented estimates and weakened inventory integrity. - Incorrect calculation assumptions
Emissions accounting requires technical precision. Using inappropriate emission factors, mixing data types without clarity, or relying on outdated factors can materially distort results. - Underestimating reporting rigor
Treating GHG reporting as a symbolic or administrative task rather than a structured accounting process leads to unclear boundaries, undocumented assumptions, and inconsistent application of standards. - Insufficient documentation
Without clear documentation of decisions, methodologies, and data sources, organizations face difficulty reproducing results or responding to inquiries from buyers, investors, or auditors. - Viewing reporting as a one-time exercise
GHG accounting is an ongoing process. Establishing annual routines and data governance practices improves comparability and reduces effort in subsequent cycles.
Avoiding these issues does not require perfection. It requires consistency: defined boundaries, disciplined data management, transparent documentation, and alignment with recognized frameworks from the outset. These elements form the foundation of a credible GHG inventory.
If you are assessing your greenhouse gas reporting approach or preparing for an upcoming disclosure cycle, Auri provides technical guidance grounded in structured methodology and practical implementation. We are available to discuss your objectives and reporting requirements.