About Acumon
Acumon began as Johnsons Chartered Accountants, a respected West London practice. Today we're 90+ UK-based professionals serving everyone from startups to listed companies — and we've kept the personal service that got us here.
Same Standards. Bigger Ambitions.
Chartered Accountants, Auditors, and Advisors with a rich heritage and a forward-looking vision
Acumon Chartered Accountants represents the evolution of a firm with deep roots in the UK accounting profession. Previously operating as Johnsons Chartered Accountants, we have rebranded to Acumon to reflect our growth, expanded capabilities, and commitment to delivering exceptional value to our clients.
Our journey has been marked by strategic growth and a commitment to excellence. From our origins as a respected West London practice, we have evolved into a leading UK firm with 90+ UK-based staff, serving clients ranging from individuals to large corporations across the United Kingdom.
- ICAEW-registered audit firm — including PIE audit authorisation
- 100% UK-based team — your work is never offshored
- In-house software development team since 2020
Our Growth Story
Our growth has been both organic and strategic. Over the past several years, we have significantly expanded our team from 16 staff members in 2019 to 90 professionals in 2025.
This growth has been supported by strategic acquisitions that have enhanced our expertise and service offerings:
- 2021: Merger of Rutherfords with Johnsons Chartered Accountants, bringing additional expertise and expanding our client base
- 2025: Acquisition of Carter & Coley, further strengthening our capabilities and market presence
Each acquisition has been carefully integrated into Acumon, ensuring that clients benefit from expanded expertise while maintaining the high standards of service and personal attention that have defined our practice.
Our Core Values
Integrity
We conduct our business with the highest ethical standards, ensuring transparency and trust in all our client relationships.
Professionalism
Our team of qualified professionals brings extensive expertise and a commitment to continuous learning and development.
Long-Term Relationships
We build lasting partnerships with our clients, understanding their businesses deeply and providing tailored solutions.
Adding Value
Beyond compliance, we provide strategic insights and recommendations that help clients optimise their financial performance.
Flexibility
We adapt our services to meet the unique needs of each client, from start-ups to established businesses and high-net-worth individuals.
Efficiency
We leverage technology and streamlined processes to deliver high-quality services efficiently, maximising value for our clients.
Ready to Work With Us?
Whether you're looking for audit services, tax advice, accounts preparation, or business consulting, our team is ready to help. Contact us today to discuss how we can support your financial needs.
Get in Touch
Contact us today to discuss your requirements
Come See What 90+ Experts Under One Roof Feels Like
Tell us what you need. Within one business day, a qualified accountant will be in touch to talk it through and give you a clear, fixed-fee quote — no obligation.
Speak to a Specialist
Fill this in and we'll come back to you within one business day.
Thank you — we've got it
A qualified accountant will be in touch within one business day. Prefer to talk now? Call 020 8567 3451.