Introduction

Survey data shows most companies still cannot demonstrate sustainability ROI with confidence. The Conference Board found that 41 percent of executives call their company’s measurement of sustainability ROI either underperforming or uncertain, compared with only 17 percent who say the same about traditional financial ROI. That gap is becoming harder to leave unaddressed as the regulatory mandates that once justified sustainability spending are scaled back in both the European Union and the United States, leaving companies with less cover and more reason to make the financial case themselves.

Key Takeaways

• Regulatory retreat in the European Union and the United States means a legal mandate cannot be assumed as the default justification for sustainability spend, elevating financial proof as the primary business case.
• The ROSI framework, developed at NYU Stern, converts sustainability activity into line items finance teams already track, including cost savings, revenue growth, productivity, and risk reduction.
• A materiality assessment should determine which sustainability issues merit an ROI case, rather than attempting to quantify everything at once.
• Direct cost savings, such as reduced energy or material spend, are the most straightforward way to show sustainability ROI, since they map directly onto operating budget lines finance can verify.
• Building credibility with finance works best one initiative at a time, with clear ownership and documented results guiding each successive case.

Why Does Sustainability ROI Matter More Than Ever?

Two of the world’s largest disclosure regimes pulled back from mandatory sustainability reporting within months of each other in 2026.

• European Union: The Omnibus I Directive narrowed CSRD to companies with more than 1,000 employees and above 450 million euros in turnover, raised the CSDDD threshold to more than 5,000 employees and above 1.5 billion euros, and a July 3, 2026 delegated act simplified the underlying reporting standards themselves.
• United States: The SEC proposed on May 29, 2026 to rescind its 2024 federal climate disclosure rule in its entirety, with no climate specific replacement.
• California: SB 253’s reporting deadline moved from August 10 to November 10, 2026 but the law remains fully in effect, while SB 261 is currently paused under a Ninth Circuit injunction.

For companies caught in the middle, a legal mandate cannot be counted on to justify a sustainability budget line. The Conference Board found that 41 percent of executives call their company’s measurement of sustainability ROI underperforming or uncertain, versus only 17 percent for traditional financial ROI. Closing that gap is now the central task for sustainability leaders working without a guaranteed regulatory backstop.

What Practices Do Companies Actually Use to Prove Sustainability ROI?

Companies that successfully demonstrate sustainability ROI generally work in two stages rather than following a single formula.

The first stage builds the number itself:

• A recognized financial framework, most commonly ROSI, that translates sustainability activity into line items finance already tracks.
• A materiality assessment paired with SMART targets that narrows focus and establishes a baseline.
• Quantified direct cost savings, such as energy, water, waste, and materials, that map onto existing budget lines.

The second stage makes that number hold up inside the organization:

• Named ownership of ROI reporting, usually the CFO or a cross functional committee.
• An incremental approach: proving the case one initiative at a time before scaling.

Each is covered in more depth below.

How Does the ROSI Framework Translate Sustainability Into Financial Terms?

The Return on Sustainability Investment framework, known as ROSI, was developed by NYU Stern’s Center for Sustainable Business. Instead of reporting standalone metrics like tons of carbon avoided, ROSI converts sustainability outcomes into categories CFOs already use to evaluate any investment: cost savings, revenue growth, productivity gains, and risk reduction. This matters because many finance functions still treat sustainability spending as a cost rather than a source of value, and expressing results in familiar financial language helps sustainability leaders compete for internal funding rather than defend it every year.

Why Start With a Materiality Assessment Before Calculating ROI?

Calculating ROI across every sustainability activity at once produces a diffuse, unconvincing case. A materiality assessment narrows the focus to the issues most financially significant to the business and documents a current state baseline to measure against. Each issue selected should carry a specific, measurable, achievable, relevant, and time bound target, since this creates the before and after comparison any ROI calculation depends on. Without that baseline, even a well designed framework has nothing concrete to measure against.

How Do You Quantify Direct Cost Savings for Sustainability ROI?

Direct cost savings are the most straightforward sustainability benefit to build an ROI case around, since they map onto operating budget lines finance already tracks:

• Energy: equipment retrofits and optimized HVAC or lighting reduce utility bills.
• Water: reduced use lowers municipal water and wastewater charges.
• Waste: diversion and recycling programs cut disposal and landfill tipping fees.
• Materials: lighter packaging or recycled inputs reduce per-unit procurement costs.

Because each ties to an existing invoice, utility bill, or purchase order, finance teams can verify the savings independently rather than relying on the sustainability team’s own estimate, making this the strongest starting point for a broader ROI case.

Who Should Own Sustainability ROI Reporting?

Sustainability ROI reporting holds up better with a named owner, typically the CFO or a cross functional committee, running it on the same cadence as the company’s financial disclosures. Without that ownership, the work tends to happen inconsistently, often only when a stakeholder request or audit forces it. Ownership also shapes whether sustainability performance connects to incentive structures, though compensation practices vary widely enough across companies and years that any specific figure should be confirmed directly rather than assumed from a single survey.

How Do You Build Credibility With Finance Over Time?

Sustainability leaders who build lasting credibility with finance avoid trying to prove ROI across the entire portfolio in one reporting cycle. Instead, they apply the chosen framework to a single initiative, document the result in full, and use that case as a template for the next one. This incremental approach produces a verifiable track record while letting the methodology be refined before it is applied more broadly.

Conclusion

As regulatory mandates recede in both the European Union and the United States, sustainability programs increasingly need to justify themselves on financial terms rather than legal ones. Frameworks like ROSI, paired with a disciplined baseline, verified direct cost savings, clear ownership, and an incremental approach to proof, give sustainability leaders a credible way to make that case.

Building this case starts with reliable data. Companies ready to move from anecdotal sustainability claims to a documented, financially grounded ROI case should begin by establishing verified Scope 1, Scope 2, and Scope 3 emissions data as the foundation, using a carbon accounting platform such as ASUENE to support the measurement and reporting work that any credible ROI calculation depends on.

Why Work with ASUENE Inc.?

ASUENE is a key player in carbon accounting, offering a comprehensive platform that measures, reduces, and reports emissions, including Scope 1-3. ASUENE serves over 56,000 clients worldwide, providing an all-in-one solution that integrates GHG accounting, ESG supply chain management, a Carbon Credit exchange platform, and third-party verification.

ASUENE supports companies in achieving net-zero goals through advanced technology, consulting services, and an extensive network.