Market Size And Forecast: Sustainability Assurance Services 2025-2031 (Global)
25 Mar, 2026
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Executive Summary
This report helps sustainability professionals and service providers better understand the current state of and future developments in the sustainability assurance services market, covering limited and reasonable assurance. The Verdantix market size and forecasting model incorporates census data, regulatory and macroeconomic drivers, service providers’ revenue data and global survey responses to forecast the global sustainability assurance services market until 2031. The model also segments the market by region and industry. Verdantix shows that the global market was worth over $1.8 billion in 2025 and will grow at a CAGR of 18% from 2025 to 2031.Summary for decision-makers
Increasing regulatory requirements and stakeholder pressure will drive firms to obtain assurance for sustainability data
Market size data reflect revenues and trends for sustainability assurance providers
The sustainability assurance services market was worth over $1.8 billion in 2025
The sustainability assurance services market has evolved since 2023
Regulations continue to drive demand for sustainability assurance
The sustainability assurance services market will reach over $4.9 billion in 2031
Figure 1. Breakdown of industries included in our market size and forecast
Figure 2. Geographic breakdown of core countries in six regions
Figure 3. Types of sustainability assurance services
Figure 4. Verdantix market size and forecast methodology
Figure 5. Sustainability assurance services market share by region: 2025
Figure 6. Sustainability assurance services market share by industry: 2025
Figure 7. Timeline of key sustainability assurance requirements
Figure 8. Sustainability assurance services spend by region: 2025-2031
Figure 9. Sustainability assurance services spend by industry: 2025-2031
Center for Audit Quality (CAQ), European Commission, EY, Hong Kong Trade Development Council (HKTDC), International Association of Economics and Finance, International Auditing and Assurance Standards
Board (IAASB), International Monetary Fund (IMF), International Organization for Standardization
(ISO), International Sustainability Standards Board (ISSB), Japan Financial Services Agency, KEY ESG, LSEG, S&P Global, Securities and Exchange Board of India (SEBI), UN, US Securities and
Exchange Commission (SEC)
About the Authors

Jessica Pransky
Principal Analyst
Jessica is a Principal Analyst at Verdantix, specializing in providing insights to sustainability leaders and analysing ESG and sustainability reporting software. She advises ...
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Kim Knickle
Research Director
Kim Knickle is a Research Director at Verdantix, bringing more than two decades of analyst experience to the evolving world of sustainability. Her current research spans ESG a...
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