The question "what does ey do" points directly to one of the world’s most influential professional services firms. Ernst & Young, commonly known as EY, operates at the intersection of business, technology, and regulation, helping organizations navigate complexity with confidence. With a presence in more than 150 countries, the firm shapes how companies report performance, manage risk, and unlock value in an increasingly volatile environment.
Core Lines of Service
EY delivers integrated assurance, advisory, and transaction services that address critical priorities for boards, investors, and executive teams. The organization’s capabilities span audit, tax, consulting, and strategic transactions, allowing it to coordinate across disciplines on a single client initiative. This cohesive model helps clients connect financial reporting with operational insight, turning data into actionable strategy rather than isolated compliance.
Audit and Assurance in a Complex World
At the heart of EY’s identity is its audit and assurance practice, which provides independent examination of financial statements and internal controls. The team evaluates risk, tests processes, and applies advanced analytics to detect anomalies that may not be visible through traditional sampling. As regulators and stakeholders demand higher transparency, EY enhances audit quality with technology, standardized methodologies, and sector-specific expertise.
Risk Management and Internal Controls
Beyond statutory audits, EY helps organizations design, implement, and assess enterprise risk management frameworks. These engagements cover financial reporting controls, cybersecurity resilience, regulatory compliance, and operational continuity. By mapping controls against global standards, the firm enables management to identify gaps, prioritize investments, and demonstrate robust governance to auditors and regulators.
Advisory and Consulting for Growth
EY’s advisory services focus on strategy, performance improvement, and transformation initiatives that align with long-term value creation. Practitioners work on topics such as enterprise architecture, data and analytics, sustainability reporting, and mergers integration. This work often intersects with technology implementation, where EY coordinates digital roadmaps with existing systems to minimize disruption and maximize adoption.
Tax Strategy and Compliance
Tax remains a critical pillar of EY’s service portfolio, encompassing compliance, planning, and global policy analysis. The team advises on transfer pricing, indirect taxes, incentives, and restructuring, helping organizations optimize positions while managing regulatory exposure. With ongoing international tax reforms, EY actively supports clients in implementing new regimes and aligning structures with evolving legislation.
Transaction and Corporate Finance Services
In M&A and capital markets, EY provides due diligence, valuation, and integration support that influence deal outcomes and post-close success. The firm also assists with IPOs, debt offerings, and investor communications, ensuring that financial narratives are clear, reliable, and aligned with market expectations. This end-to-end approach helps clients time transactions, manage stakeholder expectations, and structure terms that reflect true value.
Technology, Data, and Innovation
EY invests heavily in technology and data capabilities, building tools that enhance audit execution, risk assessment, and advisory impact. The firm leverages artificial intelligence, automation, and advanced analytics to improve accuracy, reduce repetitive work, and surface insights faster. These innovations not only increase efficiency but also enable teams to focus on higher-value judgment and client collaboration.
Sustainability and Purpose-Driven Consulting
Increasingly, clients turn to EY for help measuring and reporting environmental, social, and governance performance. The firm assists with metrics frameworks, assurance services, and strategy development around decarbonization, diversity, and responsible supply chains. By embedding sustainability into core decision-making, EY helps organizations strengthen resilience, meet stakeholder expectations, and capitalize on emerging opportunities.
