Deloitte Luxembourg

Our story begins with our purpose: making an impact that matters. Our founder, William Welch Deloitte, understood this well. In 1845, he had a vision to build something that would last.

Understanding the power of connection, collaboration, and innovation, he established Deloitte as a small accountancy firm. And because of his legacy, Deloitte has grown into a thriving global organization of more than 470,000 people who are dedicated to changing the world.

These founding beliefs have driven our growth for over 180 years and are the bedrock of today's Deloitte and our goal of solving the world's greatest challenges—in business and society.

Deloitte also has a long history in Luxembourg. What started in the 1950s as a small accountancy practice, “l'Agence,” is today a multidisciplinary firm of more than 2,600 employees. Deloitte Luxembourg celebrated its 75th anniversary in 2025.

At Deloitte, we believe we have a responsibility to be a force for good and lead the way on the increasingly complex challenges society faces.

WorldImpact is our portfolio of initiatives focused on making a tangible impact on society’s biggest challenges and creating a more sustainable and inclusive world.

Making an impact that matters, together

All our successes, the differences we make for our clients, our people and in our communities around the globe, come down to our purpose: to make an impact that matters. It is this simple statement that defines each decision, each connection and drives us—always. To uphold integrity and promote a culture of inclusion. To build better futures. Our Shared Values are at the core of each decision we make, how we act and help us to deliver impact how and where it matters most: lead the way, serve with integrity, take care of each other, foster inclusion, and collaborate for measurable impact. To attract and retain the best talent, Deloitte places our people at the center, anchored on four pillars: connect for impact, empower to lead, drive your career, and inclusion for all.

Read on to learn more about how we bring these values to life in our day-to-day actions and initiatives.