Last updated: 8 May 2026
Short answer: sustainability regulations affect businesses by turning climate, environmental, supply chain, and social impact questions into operating requirements. Some companies must report directly. Others feel the impact indirectly through customer questionnaires, supplier codes of conduct, lender requests, tender requirements, product claims rules, and contract clauses. The practical response is not to chase every rule at once. It is to identify which requirements actually touch the business, what data is needed, who owns that data internally, and what evidence can be produced when a customer, regulator, investor, or lender asks.
The sustainability regulatory landscape has become more complicated, not simpler. In some places, rules are expanding. In others, rules are being simplified, delayed, narrowed, or challenged. For businesses, that means the real question is no longer only "what does the law say?" It is also "which requirements are customers, investors, banks, marketplaces, and procurement teams passing down to us?"
This article explains how sustainability regulations affect businesses in practice, what changed in 2026, and how companies can prepare without turning compliance into a broad, unfocused ESG project.
Why sustainability regulation matters for business
Sustainability regulation changes business behavior because it creates consequences for data quality, governance, product design, supplier management, capital access, and public claims. A company may need to disclose emissions, explain climate risks, prove that products are not linked to deforestation, prepare supply chain due diligence evidence, substantiate environmental claims, or respond to a customer request for Scope 1, Scope 2, and Scope 3 emissions data.
For large companies, these obligations can sit directly in law. For smaller companies, they often arrive through the value chain. A multinational customer may be in scope of a reporting or due diligence rule, then ask suppliers for emissions data, labor practice information, procurement policies, energy usage, or site-level documentation. This is why sustainability regulation matters even when a business is not itself a listed company or a very large group.
The commercial impact is usually felt in five ways:
- More data requests: companies need reliable emissions, energy, waste, workforce, procurement, and supplier data.
- More evidence requests: customers increasingly ask for supporting documents, policies, methodologies, audit trails, or consultant letters.
- More internal ownership: finance, operations, HR, procurement, sales, and account teams may all own part of the response.
- More scrutiny of claims: sustainability marketing needs to be specific, supported, and careful.
- More contract pressure: sustainability clauses can become part of tenders, supplier onboarding, renewals, and financing.
What changed in 2026
In 2026, the direction of regulation is mixed. The overall move toward sustainability data and accountability continues, but the details are shifting.
In the EU, the Omnibus simplification package narrowed and delayed parts of the Corporate Sustainability Reporting Directive (CSRD) and Corporate Sustainability Due Diligence Directive (CSDDD). Under the simplified approach described by EU institutions, CSRD scope is narrowed to companies above new employee and turnover thresholds, while CSDDD scope is narrowed to very large companies with more than 5,000 employees and above EUR 1.5 billion net turnover. The CSDDD compliance date has also moved to July 2029.
That does not mean sustainability reporting disappeared. EU reporting still matters for companies in scope, and the Commission has been working on revised European Sustainability Reporting Standards (ESRS) designed to reduce mandatory datapoints and simplify reporting. It also matters for smaller companies because the revised framework includes limits on the information that larger companies can request from smaller value chain partners.
In the United States, federal climate disclosure has become more uncertain. The SEC adopted climate disclosure rules in 2024, stayed them during litigation, and then proposed rescinding them in May 2026. That makes US federal climate disclosure a moving target, but it does not remove all pressure. State-level rules, investor expectations, lender requirements, customer requests, and international supply chain demands can still affect US companies.
At the same time, the International Sustainability Standards Board (ISSB) has continued to become a reference point for sustainability-related financial disclosure. The IFRS Foundation has published jurisdictional profiles showing a growing number of jurisdictions adopting, using, or moving toward ISSB-aligned requirements. This matters because companies operating across borders may see similar climate and sustainability questions appear in different regulatory forms.
The main regulatory buckets companies should watch
Most companies do not need to become experts in every sustainability regulation. They need a working map of the rules and requests most likely to affect their business. The main buckets are:
1. Sustainability reporting rules
Reporting rules require companies to disclose sustainability information in a structured way. Examples include CSRD and ESRS in the EU, ISSB-aligned rules in various jurisdictions, local stock exchange sustainability reporting rules, and national climate disclosure requirements. These rules affect governance, data systems, materiality assessments, emissions calculations, and external reporting processes.
If your company is trying to understand EU reporting exposure, start with our guide to sustainability reporting under the CSRD and our practical overview of the European Sustainability Reporting Standards.
2. Climate and emissions rules
Climate regulation can require companies to measure greenhouse gas emissions, disclose climate risks, report on transition plans, or provide product or import-related carbon data. Even where direct legal requirements are limited, customer requests for emissions data are becoming more common.
For many companies, the first practical step is a reliable emissions baseline. That usually means collecting activity data, calculating Scope 1 and Scope 2 emissions, deciding which Scope 3 categories are relevant, and documenting the methodology. Keslio supports this through GHG emissions calculations.
3. Supply chain and due diligence rules
Due diligence rules focus on identifying, preventing, mitigating, and addressing adverse environmental and human rights impacts. The CSDDD is the most visible EU example, but supply chain due diligence also appears through customer codes of conduct, modern slavery requirements, deforestation rules, responsible sourcing policies, and sector-specific procurement expectations.
The important point for suppliers is indirect impact. A smaller company may not be directly covered by a due diligence law, but its customer may need supplier information to satisfy its own obligations. That can turn into questionnaires, evidence requests, contract clauses, site information, or annual refreshes. For a deeper explanation, see our guide to CSDDD and sustainability due diligence.
4. Product, packaging, and circular economy rules
Product-focused regulation affects design, packaging, recyclability, waste management, extended producer responsibility, product durability, and end-of-life obligations. For consumer goods, electronics, packaging, food, agriculture, and manufacturing companies, these rules can shape product development and supplier selection as much as reporting.
For example, extended producer responsibility laws can make companies responsible for packaging or product waste after sale. Deforestation-related rules can require traceability and due diligence for certain commodities and materials. Carbon border measures can affect importers and exporters of covered goods by requiring embedded-emissions information.
5. Green claims and communications rules
Marketing claims are becoming a compliance topic. Regulators are paying closer attention to vague claims such as "green", "eco-friendly", "carbon neutral", or "sustainable" when they are not supported by clear evidence. The business risk is not only legal. Unsupported claims can damage customer trust, investor confidence, and tender credibility.
If a company makes sustainability claims, it should be able to explain what the claim covers, what evidence supports it, what boundary was used, and what limitations apply. Our guide to greenwashing regulations explains this in more detail.
How regulations affect internal teams
Sustainability regulation often starts as a compliance issue, but implementation spreads across the company.
Finance may need to integrate sustainability data into reporting calendars, controls, and audit trails. Operations may own energy, fuel, waste, logistics, and site-level activity data. Procurement may need supplier questionnaires, contract clauses, and sourcing policies. HR may own workforce, diversity, training, health and safety, and grievance data. Sales and account teams may be the first to receive customer sustainability requests. Leadership may need to approve governance, risk, targets, and public statements.
This is why a sustainability regulation response should not sit with one person in isolation. A practical response needs owners, data sources, review points, and a clear decision on what is being prepared: a legal compliance response, a customer response, a sustainability report, an emissions calculation, or a broader strategy project.
The indirect impact on smaller businesses and suppliers
Many smaller companies assume sustainability regulation is only for large listed companies. That is often wrong in practice. Smaller companies can be pulled in through customer requirements, investor due diligence, bank questionnaires, tender scoring, marketplace rules, or parent-company reporting.
A supplier might receive a request asking for:
- Scope 1 and Scope 2 emissions
- relevant Scope 3 activity data
- energy consumption and renewable electricity evidence
- labor, human rights, health and safety, or grievance information
- supplier policies and procurement controls
- product or service-level carbon information
- certifications, policies, or methodology documentation
The first step is to read the actual request carefully. Is the customer asking for a company-level footprint, a specific product or service boundary, a policy, a questionnaire, a platform upload, a consultant letter, or an assurance requirement? These are different response paths. Keslio's supplier request support is designed for exactly this kind of practical triage.
Common mistakes companies make
Trying to comply with everything at once. The regulatory landscape is too broad for a generic response. Start by mapping what directly applies, what indirectly applies, and what is only useful background.
Starting calculations before interpreting the request. If a customer asks for service-level emissions but the company prepares only a company-level footprint, the work may not answer the request.
Keeping sustainability data outside normal controls. A spreadsheet can work at first, but companies still need source files, version control, assumptions, review notes, and named data owners.
Making broad claims without evidence. Public sustainability claims should be specific, limited, and backed by documentation.
Treating supplier requests as one-off admin. Many requests repeat annually. A good first response should create a reusable evidence base, not just a one-time answer.
A practical response plan
Companies can make regulation manageable by using a structured sequence:
- Map exposure: list the jurisdictions, entities, customers, sectors, and products that may trigger requirements.
- Separate direct and indirect obligations: identify what the law requires directly and what customers or investors are passing down.
- Define the response path: decide whether the immediate need is reporting, emissions calculation, supplier evidence, claims substantiation, or strategy.
- Build a data inventory: identify the metrics, source systems, owners, and evidence needed.
- Close the most urgent gaps: prioritize customer deadlines, legal deadlines, high-risk claims, and missing emissions data.
- Create reusable documentation: keep methodology notes, assumptions, policies, and supporting files in a form that can be refreshed.
- Review before submitting: check that the response matches the request, uses the right boundary, and avoids overclaiming.
When to get external support
External support is useful when the company has a real deadline, unclear request wording, limited internal sustainability capacity, or a need to produce customer-ready documentation. It is also useful when the business needs to coordinate across finance, operations, HR, procurement, and sales without building a full internal sustainability team.
Keslio can help companies review requirements, prepare reporting workplans, calculate emissions, respond to customer sustainability requests, and build practical documentation. We do not provide legal advice, and companies should involve legal counsel where interpretation of law, liability, or contractual obligations is required.
If you are facing a reporting requirement, start with reporting and communications support. If a customer or buyer has sent a specific request, start with supplier request support. If the main gap is emissions data, start with GHG emissions calculations. If the issue is broader business planning, Keslio can help through sustainability strategy.
Bottom line
Sustainability regulations affect businesses by making sustainability data, evidence, governance, and claims part of normal commercial life. The rules will continue to change, but the direction is clear: companies need to know their impacts, document their methods, respond credibly to stakeholders, and avoid unsupported claims.
The best response is practical. Understand the actual requirement, identify the right boundary, gather the right data, document the evidence, and build a process that can be repeated when the next regulation, tender, customer request, or investor question arrives.
