Why Customers and Partners Are Asking for Sustainability Data

Welcome to Teaching Sustainability, the 20-week series from Aclymate created to help small and mid-sized business leaders understand what sustainability means, why it matters, and what to do next. Each week, we cover one practical topic, from carbon accounting and reporting to certifications and climate action, in clear, simple language designed to help you build a more resilient, credible, and competitive business.

Last chapter, we covered activity data versus spend data, the two ways to actually calculate an emissions number. This chapter steps back from methodology and asks a different question: why are you being asked to produce that number in the first place? For a growing share of small and mid-sized businesses, the answer isn't regulation. It's the businesses they sell to.

The Request Doesn't Come From a Regulator. It Comes From a Customer

Most small and mid-sized companies aren't directly subject to climate disclosure law. But that doesn't mean they're off the hook. Large companies that are subject to reporting requirements, whether from regulators, investors, or their own public commitments, have to account for their Scope 3 emissions, and Scope 3 includes everything in their supply chain. That means their suppliers' emissions become their problem to report on.

The practical result: if you sell into a larger company's supply chain, some version of "tell us about your emissions" is increasingly likely to show up in your inbox. It arrives in a few recognizable forms.

Supplier questionnaires. A standing customer sends an annual sustainability survey, often through a third-party platform like EcoVadis or CDP, asking about your emissions, your policies, and your reduction plans.

RFP and procurement requirements. A prospective customer's request for proposal includes a section on environmental practices, sometimes as a scored criterion, sometimes as a pass/fail gate before you're even considered.

Direct requests from large customers. An account manager or procurement contact asks, informally or formally, for your carbon footprint, your climate targets, or confirmation that you're tracking Scope 1 and 2 at minimum.

Industry and procurement standards. Trade associations, certification bodies, or buying consortia adopt shared sustainability criteria that member companies then push down to their entire supplier base.

None of these carry the force of law. All of them can carry the force of a contract.

Why This Is Becoming More Common, Not Less

A few forces are converging to make these requests more frequent rather than rarer:

• Regulatory pressure on large companies is real, even if it doesn't apply to you directly. Frameworks like the EU's Corporate Sustainability Reporting Directive and California's climate disclosure laws require Scope 3 reporting from the companies they cover, and Scope 3 only exists because of suppliers.
• Procurement teams are being handed sustainability targets of their own. When a large buyer commits publicly to a supply-chain emissions reduction goal, procurement is the department tasked with hitting it, and supplier data collection is how they track progress.
• It's becoming a differentiator, not just a compliance exercise. Companies that can answer a sustainability questionnaire quickly and credibly are easier to do business with. Companies that can't, or that stall for months gathering numbers under deadline pressure, introduce friction into a deal that a competitor might not.

The direction of travel matters here. Even businesses that have never received one of these requests should expect that they eventually will, especially if their customer base includes larger, publicly traded, or heavily regulated companies.

What "Credible" Actually Means to the Person Reading Your Answer

Not all answers to a sustainability questionnaire carry equal weight. A rough guess, an estimate with no documented method behind it, and a properly scoped inventory can all technically answer the same question, but they don't land the same way with the person evaluating your response.

What tends to hold up under scrutiny:

• A defined boundary. You can say clearly what's included in your numbers: which operations, which scopes, which time period.
• A documented methodology. You can explain whether a figure came from activity data, spend data, or a blend, consistent with what we covered last chapter.
• Consistency year over year. Your numbers use the same boundary and method each period, so a customer can actually track your trend rather than compare unrelated figures.
• Third-party grounding. Emission factors from recognized sources, like the EPA, rather than internally invented assumptions.

You don't need a perfect inventory to satisfy most of these requests. You need one you can explain and defend, and one that improves in a visible, documented way over time. That's a lower bar than it might sound, and it's exactly the kind of inventory the last several chapters have been walking you toward.

What to Do This Week

Check whether you've already received a request like this. Search your inbox for terms like "sustainability questionnaire," "EcoVadis," "CDP," or "carbon footprint" from the last 12–24 months. Many businesses have one sitting unanswered or answered incompletely.

Ask your sales and account management teams directly. Procurement-driven requests often land with a salesperson or account manager rather than anyone tracking sustainability, and they may not realize the request matters until asked.

Identify your largest customers by revenue and check their public commitments. A quick look at a major customer's sustainability page or annual report will usually tell you whether supply-chain emissions reporting is already part of their strategy, and therefore likely headed your way.

How Aclymate Helps

Aclymate is built to answer exactly these requests without a scramble. Your emissions data, activity-based where the underlying records support it, spend-based to fill remaining gaps, stays organized and current, so when a questionnaire, RFP, or customer request lands, you're pulling from a maintained inventory rather than assembling one from scratch under deadline. On the Aclymate One tier, your Carbon Bookkeeper can help you prepare responses to common supplier questionnaires and identify which of your existing data already answers what's being asked.

The Takeaway

Sustainability reporting for a small or mid-sized business increasingly isn't optional just because no regulator requires it directly. It shows up through the supply chain, in a questionnaire, an RFP scorecard, or a customer's own climate commitments, and it rewards the businesses that can answer quickly, consistently, and with a method they can stand behind. Building that inventory before the request arrives, rather than after, is what turns a scramble into a five-minute reply.

With the "why" now covered, next chapter turns back to the numbers: building your first complete emissions inventory and setting your baseline year.