An ESG questionnaire from a major customer can create immediate anxiety for a small or mid-sized business.
The deadline may be short. The questions may be unfamiliar. The information may sit across finance, operations, HR, procurement and facilities. And there may be no sustainability manager to coordinate it.
The natural response is to treat the questionnaire as a one-off administrative task.
That is understandable—but it is usually the wrong approach.
A customer ESG request is often the first sign that sustainability information is becoming part of how your company will be assessed: as a supplier, tender participant, borrower, insurer or business partner.
The better response is to use the request to build a simple sustainability-information baseline that your company can reuse.
You do not need a 100-page report. You do need accurate information, clear ownership and a record of the evidence behind your answers.
Why customers are asking
Larger companies increasingly need information from suppliers to understand their own emissions, environmental impacts, workforce risks and supply-chain exposure.
Your customer may need the information for:
Its Scope 3 emissions calculations.
Supplier due-diligence processes.
Procurement scoring.
Corporate sustainability reporting.
Customer and investor requirements.
Internal risk management.
In other words, the questionnaire is rarely only about your business. It is part of your customer’s own reporting and risk-management process.
That does not mean every question is equally relevant to every supplier. But it does mean that vague, inconsistent or unsupported answers may affect future commercial conversations.
The first seven actions
1. Do not answer alone
Assign one internal coordinator, but involve the functions that own the information.
Finance may hold utility bills and travel costs. Operations may understand energy use and production processes. HR may hold workforce data. Procurement may know supplier policies. Directors may own governance and targets.
The coordinator’s role is to organise the process—not to invent the answers.
2. Clarify what the customer actually needs
Read the questionnaire before gathering data.
Identify:
The reporting period.
Which legal entity or sites are covered.
Whether evidence is required.
Whether the customer requires a specific calculation method.
Which questions are mandatory.
The submission deadline.
Whether there is an opportunity to explain data gaps.
If something is unclear, ask. A short clarification email can prevent days of unnecessary work.
3. Gather the core information first
Most requests begin with a familiar group of topics:
Electricity, gas and fuel consumption.
Scope 1 and Scope 2 greenhouse-gas emissions.
Waste, water or key environmental indicators.
Employee numbers, health and safety, training and workforce policies.
Environmental, ethics, anti-bribery and human-rights policies.
Governance responsibilities.
Existing targets, certifications or improvement projects.
Start with what you can evidence today. Do not delay the entire response while chasing a perfect answer to one difficult question.
4. Be precise about boundaries
A number is only useful if the reader understands what it covers.
For example, when reporting energy use, state whether it covers all sites or only one location. When reporting emissions, state the period, methodology and source of data. When discussing a target, say whether it applies to the whole business or a specific operation.
A smaller amount of clearly scoped information is more credible than a large amount of ambiguous data.
5. Do not overclaim
Avoid unsupported terms such as “carbon neutral”, “net zero”, “eco-friendly” or “fully sustainable” unless you can substantiate exactly what they mean.
Instead, state verifiable facts:
“We purchase renewable electricity for our UK office.”
“We reduced electricity consumption by 12% between 2024 and 2025.”
“We are currently calculating our operational greenhouse-gas footprint.”
“We have not yet completed a full Scope 3 inventory.”
Honest limitations are preferable to claims that a customer may later challenge.
6. Create an evidence folder
For every answer, keep the evidence in one place.
This could include:
Utility bills and meter readings.
Fuel records.
Calculation spreadsheets.
HR and health-and-safety reports.
Policies and board minutes.
Certifications.
Supplier declarations.
Photographs or invoices relating to environmental improvements.
Name files consistently and record the date, owner and source. The next questionnaire will be easier.
7. Turn the answer into a reusable supplier pack
Once the questionnaire is complete, do not file it away and forget it.
Create a short ESG supplier pack that includes your company profile, core sustainability data, key policies, governance arrangements, targets and evidence notes.
Update it quarterly or annually. Then use it as the starting point for future customer, bank, investor and tender requests.
A useful mindset shift
The objective is not to become a sustainability-reporting expert overnight.
The objective is to give customers reliable information and demonstrate that your company can manage environmental and social risks responsibly.
A well-organised, transparent response can be more valuable than a polished document full of broad promises.
For SMEs, the commercial advantage lies in being easier to assess, easier to onboard and easier to trust.
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Sources and further reading
European Commission, “Commission adopts revised sustainability reporting standards to reduce administrative burdens for EU businesses while maintaining high-quality disclosures”, 3 July 2026. The Commission adopted both revised ESRS and a voluntary sustainability reporting standard for smaller companies outside CSRD scope.
EFRAG, “European Commission publishes Delegated Act on revised ESRS and voluntary sustainability reporting standard”, 3 July 2026. This confirms the revised framework and notes the expected application of revised ESRS to financial years beginning on or after 1 January 2027, subject to the legislative process.
EFRAG, “Three new EFRAG guides now available to support SMEs in sustainability reporting”, 11 December 2025. The guidance supports SMEs using the Voluntary Standard for SMEs (VSME), including guidance on setting greenhouse-gas emissions-reduction targets.
EFRAG, “SMEs showcase their sustainability reporting experience”, 15 June 2026. This provides real-world context on SME use of VSME-based sustainability reporting.