Regulations Are Rising: What SMB Leaders Should Know

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 science-based targets and what it means to set a reduction goal that holds up under scrutiny. This chapter shifts from what you commit to internally to what the outside world is starting to require. Climate regulation is expanding, and even businesses that aren't directly in its scope are feeling its effects through their customers, lenders, and supply chain relationships.

The Regulatory Landscape Is Changing Fast

For most of the past two decades, climate disclosure was voluntary. Companies that measured and reported their emissions did so because they wanted to, not because they had to. That era is ending.

A wave of mandatory climate disclosure rules is now in various stages of adoption across major economies. The specifics vary by jurisdiction, but the direction is consistent: large companies are being required to measure, disclose, and in some cases act on their climate-related risks and emissions. And because large companies have supply chains full of smaller suppliers, the pressure doesn't stop at the regulatory threshold.

The Rules That Matter Most Right Now

• California's Climate Laws. California passed two landmark climate bills in 2023. SB 253 requires large companies doing business in California, defined as those with over one billion dollars in annual revenue, to disclose their Scope 1, 2, and 3 emissions publicly. SB 261 requires a separate set of companies to disclose climate-related financial risks. These are among the most far-reaching corporate climate disclosure rules in the United States, and because California's economy is so large, they effectively set a national standard for companies operating there.
• The SEC Climate Disclosure Rule. The U.S. Securities and Exchange Commission finalized a climate disclosure rule requiring publicly traded companies to report material climate-related risks and, for larger filers, their Scope 1 and 2 emissions. The rule has faced legal challenges that have slowed implementation, but the direction of travel is clear: emissions disclosure is moving from voluntary to mandatory for public companies.
• The EU Corporate Sustainability Reporting Directive (CSRD). The European Union's CSRD requires large companies operating in the EU to report detailed sustainability information, including emissions across all three scopes, under a standardized framework. It also extends to non-EU companies with significant EU revenue. CSRD is widely considered the most comprehensive mandatory sustainability reporting framework currently in force anywhere in the world.
• Emerging rules elsewhere. The UK, Australia, and several other major economies are developing or have adopted their own mandatory climate disclosure frameworks. The global trend is toward convergence around Scope 1, 2, and 3 reporting aligned with recognized standards like the GHG Protocol and the Task Force on Climate-related Financial Disclosures (TCFD).

Why This Matters If You're Not Directly Regulated

This is the part most small and mid-sized business leaders miss. If your company falls below the revenue thresholds in these rules, you may assume they don't apply to you. That assumption is increasingly risky for two reasons.

First, Scope 3. As we've covered throughout this series, Scope 3 captures the emissions that happen across a company's value chain, including its suppliers. When a large corporation is required to disclose its Scope 3 emissions, it needs data from its suppliers to do so accurately. That data request flows downstream to you, often in the form of a supplier questionnaire, an EcoVadis assessment, or a CDP supply chain disclosure. The regulation applies to your customer, but the data requirement lands on your desk.

Second, financial relationships. Banks, insurers, and investors are increasingly required or expected to assess the climate risk in their portfolios. That means lenders may start asking about your emissions profile as part of credit decisions, and insurers may factor climate exposure into coverage and pricing. Even if no government regulation directly applies to your business, your financial relationships may bring equivalent pressure through a different door.

Greenwashing Risk Is Also Rising

Alongside mandatory disclosure rules, regulators in the EU, the UK, and the United States are increasing enforcement around misleading environmental claims. The EU's Green Claims Directive sets strict standards for what companies can say about their sustainability performance, requiring claims to be substantiated, specific, and independently verified. The U.S. Federal Trade Commission's Green Guides, which govern environmental marketing claims, are currently under review and expected to be updated with stricter standards.

The practical implication: vague claims like "eco-friendly," "sustainable," or "carbon neutral" are under increasing scrutiny. If you make them, you need to be able to back them up with documented, verifiable data.

What to Do This Week

• Identify your largest customers and check whether they are subject to CSRD, California's climate laws, or the SEC rule. If they are, a Scope 3 data request from them is a question of when, not if. Getting your inventory in order now means you're ready when it arrives.
• Review any environmental claims in your current marketing materials. For each one, ask whether it is specific, measurable, and substantiated by documented data. If the answer is no, update or remove the claim before it creates regulatory or reputational risk.
• Talk to your bank or primary lender about whether they have a climate risk assessment process. Some financial institutions are ahead of others on this. Knowing where your lender stands helps you anticipate whether your emissions profile will factor into future credit conversations.

How Aclymate Helps

Aclymate is built to produce the kind of documented, scope-organized emissions inventory that mandatory disclosure frameworks require. Whether your customer needs your Scope 3 data for their CSRD report, your lender wants to understand your climate risk profile, or you need to substantiate an environmental claim in your marketing, the platform gives you verified numbers and documented methodology to point to. On Aclymate One, your Carbon Bookkeeper monitors the regulatory landscape and helps you understand which requirements are relevant to your business and your customers, so you're never caught off guard by a rule you didn't know was coming.

The Takeaway

Climate regulation is no longer a large-company problem. The rules apply directly to large companies, but the data requirements, the procurement pressure, and the financial scrutiny flow downstream to smaller businesses through supply chains, customer relationships, and lending decisions. The businesses that are already measuring, already documenting, and already building credible reporting are the ones that will handle this transition smoothly. The ones that aren't will be scrambling to catch up on someone else's deadline.

The regulations are rising. The question is whether you're ready before the waterline reaches you.