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Transform your ESG reporting with expert support.
Customer ESG questionnaires keep getting longer. The core ask is usually the same: show us your carbon footprint in a way we can plug into our Scope 3 inventory.
You can answer that without rebuilding your company around sustainability. Focus on a defensible calculation, transparent assumptions, and a reusable process for the next buyer who asks.
Start with the customer brief
Before opening a spreadsheet, clarify organisational boundary, reporting year, required scopes, and units. Build one internal dataset and map it outward.
Collect activity data you already own
- Electricity and heat invoices
- Fuel purchases and fleet mileage
- Process fuel or refrigerant top-ups where relevant
- High-level purchase or logistics data for priority Scope 3 categories
Gaps are normal. Document estimates and improve data quality on the next cycle.
Calculate with recognised factors
Apply GHG Protocol logic and emission factors from reputable sources. Keep a calculation log so answers stay consistent.
Keep cost proportionate
Most SMEs need guided data collection, automated factor application, and a clean export — not six-figure retainers.
Deliver what procurement can use
Send totals by scope, methodology notes, and the file format they requested. Clarity beats volume.
Sustainly helps SMEs run this loop repeatedly: collect, calculate, report, and reuse.