A sustainability survey arrives from a customer: a spreadsheet with 40 rows, an invitation to a platform, or a PDF asking for data you have never tracked. A relationship you want to keep depends on an adequate response.
| First question | Short answer |
|---|---|
| Is the customer questioning the relationship? | No. Companies do not chase data from suppliers they plan to drop. They need it for their own reporting. |
| What does it cover? | Five areas: environmental performance, social and labor standards, governance and policies, supply chain transparency, certifications. |
| Which questions recur? | Ten, listed below. Answer those accurately and the core of most surveys is covered. |
| What is a credible response? | Real data, supporting documents, consistency with what you said before. |
| What if I score below their threshold? | A corrective action plan request, not a termination notice. |
Why customers send surveys
Most are not optional for the sender. The companies sending them are subject to the EU's Corporate Sustainability Reporting Directive, which requires large companies to disclose their value chain's environmental and social impact, suppliers included. Without your data they cannot complete their reporting.
Investors add to the pressure, demanding sustainability data across the value chain. Scope 3 emissions — the footprint embedded in purchased goods and services — are the majority of most large companies' totals. Your operations are part of that calculation.
What a supplier sustainability assessment covers
Environmental performance. Almost always. Energy consumption (kWh, renewable share), greenhouse gas emissions (Scope 1 and 2 at minimum), water, waste, and reduction targets with progress. For a supplier that has never tracked these, this section takes the most groundwork.
Social and labor standards. Health and safety (injury rates, fatalities, management systems), working conditions, living wage, non-discrimination. Possibly diversity, and modern slavery or forced labor risk, particularly from customers under the UK Modern Slavery Act or similar.
Governance and policies. The documents and systems behind operations: a written environmental policy, a code of conduct, a supplier code that flows down, an ethics or whistleblowing channel. Many suppliers have informal practice that meets the intent but has never been written down. This section often means writing policies, not finding them.
Supply chain transparency. Who your key suppliers are, whether you assess their practices, how far your visibility extends. For most small suppliers the honest answer is short: "We source from [X] main suppliers. We have not formally assessed their sustainability practices."
Certifications and verification. ISO 14001, ISO 45001, B Corp, sector certifications. Not having them is not disqualifying; having them simplifies the response.
The ten most common questions
Across EcoVadis, Sedex, IntegrityNext, CDP, and direct questionnaires:
- What were your total Scope 1 and 2 greenhouse gas emissions last year?
- What percentage of your energy comes from renewable sources?
- Do you have a formal environmental policy? Provide a copy.
- Any major environmental incidents or regulatory violations in the past three years?
- What is your total recordable incident rate for employee injuries?
- Do you have a formal health and safety management system?
- Do you have a code of conduct or ethics policy?
- Do you assess your own suppliers for sustainability risk?
- Do you hold any third-party sustainability certifications?
- Have you set targets to reduce carbon emissions?
Most other questions are variations on these or requests for supporting documents.
What a credible response is
Customers assessing suppliers expect honesty, consistency, and evidence that you understand what you report. Not perfection.
Real data. If consumption was 180,000 kWh, report 180,000 kWh. If unknown, say the data does not exist yet and when it will. Customers working with hundreds of suppliers identify inflated or inconsistent figures quickly; a discovered inaccuracy damages trust more than an acknowledged gap.
Supporting documents. A policy document is more credible than a yes. An energy bill is more credible than a self-reported figure. A safety record summary is more credible than a rate without context.
Consistency. If next year's numbers change significantly without explanation, questions follow. A repeatable data process matters for next year as much as this one.
Preparing before the survey arrives
Reactive preparation produces lower-quality responses and takes longer. For a first ESG questionnaire, the gaps are significant, and some need a full year of tracking to close.
The practical minimum:
- Energy: monthly utility bills, totalled annually
- Waste: weight or volume disposed and recycled, from the hauler on request
- Emissions: a basic Scope 1 and 2 calculation from energy and fuel data
- Policies: written environmental, health and safety, and ethics policies, signed
- Incidents: a log of workplace injuries and environmental incidents maintained through the year
For the emissions line, the free carbon calculator does the conversion from energy and fuel figures.
This takes a short session each month. The alternative is reconstructing a year in the week before the deadline.
Data you do not have
Missing ESG data is the most common difficulty. Acknowledge the gap, explain why the data is unavailable, and state what is being done to collect it.
Most platforms and surveys have a "not applicable" or "data not yet available" option per question. Use it rather than invent a number. "We did not track this metric last year and have now implemented [process] to collect it" scores better than an obviously estimated figure. Where sector benchmarks are used as proxies, label them as estimates in the notes field.
Scoring and what follows
Customers handle results differently. Some use scoring platforms — EcoVadis produces a 0–100 score. Others categorize suppliers as low, medium, or high risk, with higher-risk suppliers subject to audit or corrective action. If the customer uses EcoVadis, the free EcoVadis readiness check shows preparedness before the assessment opens.
Most customers set a minimum threshold rather than seeking the highest rating. Find out what it is. A response that clears the threshold and covers the material topics credibly is sufficient.
A score below threshold usually brings a corrective action plan request: a list of gaps and the steps you commit to, with timelines. It is an invitation to improve, not a termination notice.
For multiple questionnaires from different customers, one master data set adapted to each format is worth the setup. The data is the same; the presentation differs.
A repeatable process
The first survey takes longest because the data infrastructure is built from nothing. After it, record what data was used, where it came from, and which gaps were acknowledged. That gap list is the collection plan for the year. When the next survey arrives, from the same customer or another, the answers exist.