Deloitte175

Join us for a celebration of 175 years of making an impact that matters.





Time portal

Journey through time and around the world as you learn about Deloitte’s impact to talent, society and clients over the last 175 years.



Global HQ, United States | The dot is born | 2009 Singapore | Global Deloitte University | 2016 Nigeria | Nigerian origins | 1944 Middle East | The first in the Middle East | 1980 Tokyo, Japan | Japanese origins | 1968 India | Sir S.B. Billimoria | 1928 Washington DC, US | The Lincoln proclamation | 1864 London, UK | A typical workday | 1847 London, UK | Professional accountancy | 1870 United States | Developing future leaders | 2019 United States | A commitment to leadership and learning | 2018 Johannesburg, SA | A progressive leader | 1905 United States | A progressive leader | 2003 United States | The first | 1920 London, UK | Deloitte + 1 | 1857 London, UK | A Role Model Founder: Empowering Lives for Generations | 1897 St. Petersburg, Russia | Arrival in St. Petersburg | 1913 Nigeria | Connections in Nigeria | 1960 Beijing, China | The first in Beijing | 1984 Tokyo, Japan | An international force | 1968 Norway | The company of trust | 1916 Germany | A unified Germany | 1990 Montreal, Canada | Canadian beginnings | 1858 Australia | Australian beginnings | 1880 United States | Introducing…AUDITAPE | 1967 Los Angeles US | Innovative technology | 1928 United States | The power of an idea | 1970 London, UK | New technology | 1983 United States | Built on Trust | 1898 United States | Haskins meets Sells | 1893 Global HQ US | Strategic alliances | 2018 Washington DC, US | Haskins & Sells and the U.S. Post Office | 1895 Chicago, United States | Impact in Chicago | 1901 Minnesota, US | Baking off | 1963 Global HQ US | A merger of equals | 1989 United States | Maintaining independence | 1962 Middle East | Extreme conditions | 1949 Middle East | Traveling for business | 1950 Middle East | Growth in the Middle East | 1971 Middle East | Saba joins the network | 1978 London, UK | The beginning | 1845 London | More than a railway auditor | 1880 UK | Cutting edge connections | 2019 UK | "Driving" change | 1970 London | At the circus | 1901 UK | The first and second revolutions | 1845 India | Indian beginnings | 1928 India | Focus on service | 1965 New Zealand | National and global reach | 1980 Canada | National and global reach | 1980 United States | National and global reach | 1980 South Africa | Dedication to equality | 1929 United States | Sells Plan for Peace | 1915 Global HQ, United States | WorldClass ambition | 2018 Tokyo, Japan | Founder's wisdom | 2011 South Africa | Pim's commitment | 1905 Canada | Collaborating for impact | 2018 New York, United States | Relief in WWI | 1919 Johannesburg, SA | From London to Johannesburg | 1890 UK Southall | His works do follow him | 1897 New York, United States | A sign of things to come | 1901 Amsterdam | The greenest building in the world | 2019 Singapore | A "greenhouse" for complex problems | 2019 France | The French connection | 1845 United States | The first Japanese CPA in the U.S. | 1970 Japan | The first Japanese CPA in the U.S.| 1970 United States | Birth of the peer review system | 1970
1845
1845
2020

Past Is Prologue


2020 marks 175 years of Deloitte people making an impact that matters. It’s an enduring story that began in 1845 with William Welch Deloitte. An individual with an ideal, integrity and incentive to build something that would last. Someone who understood the power of connection as a way to grow. It was the start of a thriving global organization, which has grown to more than 300,000 people proudly carrying forth a legacy of connection and collaboration. Ideals that remain the bedrock of today’s Deloitte—an organization with the multidimensional perspectives necessary to solve the world’s greatest challenges— in business and society.

It’s in our DNA.

It’s how we make an impact that matters. We’ve been a human catalyst at the intersection of business and technology since the advent of the steam engine. We’ve served clients through three industrial revolutions. We’re more than ready to lead through the fourth. We’re not trusted because we’ve existed for 175 years. We’ve existed for 175 years because we’re trustworthy. That’s why clients choose Deloitte.

That’s our legacy. That’s our future.

Stories

Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
The Ties That Bind: William Welch Deloitte, Railroads and the Birth of Professional Accounting
Founder William Welch Deloitte became a leader in the burgeoning field of accounting just as the industrialization of England gave rise to the urgent need for financial discipline.
The Ties That Bind: William Welch Deloitte, Railroads and the Birth of Professional Accounting
Elijah W. Sells and the Intersection of Compassion and Action
Elijah W. Sells, a cofounder of Deloitte legacy firm Haskins & Sells, produced a detailed peace plan during World War I that shared similarities with the plan for the League of Nations
Elijah W. Sells and the Intersection of Compassion and Action
From Typewriters to AI: Deloitte, Governments and the Dockery Commission
Deloitte’s reputation as a consultant to governments on implementing new technologies dates back to before the founding of Haskins & Sells (Deloitte LLP predecessor) in the US .
From Typewriters to AI: Deloitte, Governments and the Dockery Commission
Becoming the Green Dot
Deloitte’s distinctive Green Dot emerged out of a period of transition for the organization, but has since become a beloved and iconic symbol that embodies unity and a shared purpose for people around the world.
Becoming the Green Dot
Citizens of the World: The Foundation and Global Growth of Deloitte’s Footprint
From its earliest days, Deloitte worked with clients around the world, embracing a global outlook that would lead to the international network of member firms serving 150 countries and territories today.
Citizens of the World: The Foundation and Global Growth of Deloitte’s Footprint
The Lincoln Proclamation and Deloitte’s legacy of multigenerational service
The Lincoln Proclamation, which records Lincoln’s decision for posterity, has become a treasured part of Deloitte’s history.
The Lincoln Proclamation and Deloitte’s legacy of multigenerational service
Planting the Seeds of Leadership
Deloitte’s tradition of growing leaders from within extends deep into the organization’s history and continues today with numerous internal initiatives dedicated to helping its talented professionals grow and realize their potential.
Planting the Seeds of Leadership
Leading the Way in Technological Innovation
Deloitte became the world’s foremost auditing and professional services provider due in part to its dedication to technological innovation.
Leading the Way in Technological Innovation
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
The Ties That Bind: William Welch Deloitte, Railroads and the Birth of Professional Accounting
Founder William Welch Deloitte became a leader in the burgeoning field of accounting just as the industrialization of England gave rise to the urgent need for financial discipline.
The Ties That Bind: William Welch Deloitte, Railroads and the Birth of Professional Accounting
Elijah W. Sells and the Intersection of Compassion and Action
Elijah W. Sells, a cofounder of Deloitte legacy firm Haskins & Sells, produced a detailed peace plan during World War I that shared similarities with the plan for the League of Nations
Elijah W. Sells and the Intersection of Compassion and Action
From Typewriters to AI: Deloitte, Governments and the Dockery Commission
Deloitte’s reputation as a consultant to governments on implementing new technologies dates back to before the founding of Haskins & Sells (Deloitte LLP predecessor) in the US .
From Typewriters to AI: Deloitte, Governments and the Dockery Commission
Building for the next 175: Deloitte’s Journey to Iconic
Deloitte Global CEO Punit Renjen challenges Deloitte professionals to break down barriers and work together to transform the organization from the largest professional services provider into an iconic one.
Building for the next 175: Deloitte’s Journey to Iconic
Becoming the Green Dot
Deloitte’s distinctive Green Dot emerged out of a period of transition for the organization, but has since become a beloved and iconic symbol that embodies unity and a shared purpose for people around the world.
Becoming the Green Dot
Citizens of the World: The Foundation and Global Growth of Deloitte’s Footprint
From its earliest days, Deloitte worked with clients around the world, embracing a global outlook that would lead to the international network of member firms serving 150 countries and territories today.
Citizens of the World: The Foundation and Global Growth of Deloitte’s Footprint
The Lincoln Proclamation and Deloitte’s legacy of multigenerational service
The Lincoln Proclamation, which records Lincoln’s decision for posterity, has become a treasured part of Deloitte’s history.
The Lincoln Proclamation and Deloitte’s legacy of multigenerational service
Planting the Seeds of Leadership
Deloitte’s tradition of growing leaders from within extends deep into the organization’s history and continues today with numerous internal initiatives dedicated to helping its talented professionals grow and realize their potential.
Planting the Seeds of Leadership
Leading the Way in Technological Innovation
Deloitte became the world’s foremost auditing and professional services provider due in part to its dedication to technological innovation.
Leading the Way in Technological Innovation
From Acceptance to Inclusion
Deloitte legacy firms have a long history of promoting diversity and inclusion around the globe. For Deloitte today, cultural inclusion remains a top priority amid the knowledge that it’s still a work in progress.
From Acceptance to Inclusion
A Role Model Founder: Empowering Lives for Generations
Founder William Welch Deloitte’s contributions to his hometown of Southall in the United Kingdom are still in evidence today.
A Role Model Founder: Empowering Lives for Generations
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
Building for the next 175: Deloitte’s Journey to Iconic
Deloitte Global CEO Punit Renjen challenges Deloitte professionals to break down barriers and work together to transform the organization from the largest professional services provider into an iconic one.
Building for the next 175: Deloitte’s Journey to Iconic
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
Planting the Seeds of Leadership
Deloitte’s tradition of growing leaders from within extends deep into the organization’s history and continues today with numerous internal initiatives dedicated to helping its talented professionals grow and realize their potential.
Planting the Seeds of Leadership
From Acceptance to Inclusion
Deloitte legacy firms have a long history of promoting diversity and inclusion around the globe. For Deloitte today, cultural inclusion remains a top priority amid the knowledge that it’s still a work in progress.
From Acceptance to Inclusion
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
From Typewriters to AI: Deloitte, Governments and the Dockery Commission
Deloitte’s reputation as a consultant to governments on implementing new technologies dates back to before the founding of Haskins & Sells (Deloitte LLP predecessor) in the US .
From Typewriters to AI: Deloitte, Governments and the Dockery Commission
Leading the Way in Technological Innovation
Deloitte became the world’s foremost auditing and professional services provider due in part to its dedication to technological innovation.
Leading the Way in Technological Innovation
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
The Ties That Bind: William Welch Deloitte, Railroads and the Birth of Professional Accounting
Founder William Welch Deloitte became a leader in the burgeoning field of accounting just as the industrialization of England gave rise to the urgent need for financial discipline.
The Ties That Bind: William Welch Deloitte, Railroads and the Birth of Professional Accountin
The Lincoln Proclamation and Deloitte’s legacy of multigenerational service
The Lincoln Proclamation, which records Lincoln’s decision for posterity, has become a treasured part of Deloitte’s history.
The Lincoln Proclamation and Deloitte’s legacy of multigenerational service
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
Elijah W. Sells and the Intersection of Compassion and Action
Elijah W. Sells, a cofounder of Deloitte legacy firm Haskins & Sells, produced a detailed peace plan during World War I that shared similarities with the plan for the League of Nations
Elijah W. Sells and the Intersection of Compassion and Action
Our DNA
Deloitte’s founders, alumni, and people today have navigated confidently through 175 years of making an impact that matters to clients, to society and to each other. The following stories illustrate moments of impact and connection since 1845 and how Deloitte’s shared values continue to shape who we are today.
Citizens of the World: The Foundation and Global Growth of Deloitte’s Footprint
From its earliest days, Deloitte worked with clients around the world, embracing a global outlook that would lead to the international network of member firms serving 150 countries and territories today.
Citizens of the World: The Foundation and Global Growth of Deloitte’s Footprint
Becoming the Green Dot
Deloitte’s distinctive Green Dot emerged out of a period of transition for the organization, but has since become a beloved and iconic symbol that embodies unity and a shared purpose for people around the world.
Becoming the Green Dot
A Role Model Founder: Empowering Lives for Generations
Founder William Welch Deloitte’s contributions to his hometown of Southall in the United Kingdom are still in evidence today.
A Role Model Founder: Empowering Lives for Generations