A customer has sent an ESG data request: a spreadsheet attached to a short note, or an automated invitation to a platform. It asks about carbon emissions, supplier diversity, human rights policies.
This is happening to suppliers across every sector. You are not behind. Before responding, establish what the customer needs and why.
| First question | Short answer |
|---|---|
| Why are they asking? | Regulation, mainly the EU's CSRD. They report on their supply chain and need supplier data to do it. |
| What do they want? | Carbon footprint data, environmental policies, social and governance basics, and the documents behind them. |
| Do I have this data? | Most of it, scattered: utility bills, HR records, safety logs, existing policies. |
| What if I cannot meet the deadline? | Acknowledge receipt, give a realistic date, submit what you have. Do not go silent. |
| What if I do not respond? | Estimation from industry averages, a non-responsive flag, and over time a procurement disadvantage. |
Why customers ask now
The Corporate Sustainability Reporting Directive requires large companies to report detailed sustainability data, including their supply chain's impact. Your customer may need to report Scope 3 emissions, which include emissions from purchased goods and services. Without your data they estimate, flag a gap, or look for a supplier who can provide it.
The customer has auditors and deadlines. The quality of your response affects their compliance. It is not optional for them, which makes it increasingly not optional for you.
What customers want
Carbon footprint data. The greenhouse gas emissions associated with what you supply: Scope 1 (direct emissions from your operations), Scope 2 (purchased electricity), and where available Scope 3 (your own supply chain). At minimum, a carbon intensity or total emissions figure they can use. The free carbon calculator turns energy bills and fuel records into a Scope 1 and 2 figure.
Environmental policies. A documented policy; targets for reducing emissions. Evidence that the topic is managed systematically.
Social and governance basics. Labor practice, health and safety, diversity, anti-corruption, governance structures. Depth varies widely between customers.
Evidence. Policies, certificates, data sources behind the answers.
Most of this exists across the organization. The work is organizing it into the requested format.
The response, step by step
1. Do not let the deadline pass in silence. If the full questionnaire cannot be completed in time, acknowledge receipt and give a realistic timeline. Silence damages the relationship more than an incomplete response. The free time estimator gives an hours figure by questionnaire type and how much data you already track.
2. Identify the format. Custom spreadsheet, EcoVadis, CDP Supply Chain, Sedex SAQ. Each has its own structure and its own distinction between required and optional. For several platforms at once, EcoVadis vs CDP vs Sedex explains the differences.
3. Map questions to existing data. Energy consumption: utility bills. Employee count: HR. Safety incidents: operations. Mark what can be answered now and what needs new collection.
4. Handle gaps. You will not have everything. Distinguish measured from estimated; explain the method; state what is not tracked. Missing ESG data covers the wording. Customers expect gaps from suppliers early in the process. They do not expect fabrication.
5. Attach the evidence. If you claim an environmental policy, attach it. If you cite a certification, include the certificate. If you calculated emissions, explain how.
6. Submit and record what was hard. What could not be provided is the tracking list for next year.
What to keep for next time
Save the response work rather than letting it disappear into email:
| Item | Why it matters next time |
|---|---|
| Completed questionnaire or spreadsheet | A starting point for repeat questions |
| Energy, fuel, water, and waste figures | The most common environmental data requests |
| Methodology notes | Whether each number is measured, estimated, or not tracked |
| Current policies and certificates | Evidence for yes/no answers |
| Customer-specific wording | Consistent responses across portals |
This is the bridge from one urgent request to an ESG response system.
What good responses look like
They arrive promptly, even if incomplete: "we are gathering emissions data and will provide it by [date]."
They are specific: "we reduced energy consumption by 8% in 2025 through LED lighting and HVAC optimization", not "we are committed to sustainability".
They state limits: "we do not currently track Scope 3 emissions and plan to implement tracking in [quarter]."
They attach documentation. Every claim backed by a policy, certificate, or data source.
They treat the request as relationship maintenance rather than a compliance formality.
Common mistakes
Waiting for a perfect answer. Submit what you have by the deadline; improve next time.
Generic statements. Customers read hundreds of responses. Sustainability language without data or evidence reads as disengagement.
Treating it as a one-off. Each request is then a scramble. A system turns it into routine.
Assuming nobody verifies. Customers and auditors do. Inconsistencies between claim and documentation are trust problems.
Responding outside the platform. If the customer asks for an EcoVadis, Sedex, or CDP submission, that is their chosen system. A different channel creates work for everyone.
Long-term capability
Suppliers who handle this well are not larger or better resourced. They track data through the year, document policies once and update annually, and keep answers that adapt to different formats. It does not require a sustainability team. It requires treating ESG data as business information: accurate, current, accessible when asked for.
For a first questionnaire, where to start covers the foundation.
If you do not respond
Not immediately serious: most customers do not drop a good supplier over one incomplete questionnaire. Over time, as regulation tightens and competitors build capability, inability to respond becomes a liability. Some customers estimate your impact with industry averages, which usually looks worse than actual data. Others factor responsiveness into procurement. Some require minimum scores on platforms such as EcoVadis as a condition of business.
The aim is not to become a sustainability expert. It is to be a supplier who provides what customers need, when they need it. ESG data is the newest addition to that expectation.
Official References
- Corporate Sustainability Reporting Directive (European Commission)
- GHG Protocol Scope 3 Standard
- CDP Supply Chain