Chartered Accountants Delivering Quality, Clarity & Value.
We're a full-service firm providing trusted accountancy and business advisory support, founded in London and serving clients across the UK and internationally. With a focus on quality, clarity and compliance, we deliver tailored accounting, tax and advisory solutions that optimise your business and personal finances. Our team of 90+ professionals are all UK-based, ensuring consistent quality and local expertise. We'll optimise your business and personal finances by providing tailored services to meet your specific needs.
Why Choose Acumon?
Trusted by businesses across London with proven expertise and UK-based staff
UK-Based Staff
All our professionals are based in the UK to maximise quality and accessibility
Registered Audit Firm
Fully regulated and trusted by businesses across London and the UK
HMRC Experience
Many of our tax staff have previously worked for HMRC
Our Core Services
Comprehensive accounting solutions tailored to your business needs. Each service includes a dedicated specialist and clear deliverables.
We're a registered audit firm and act as an external auditor for UK PLCs, limited companies, charities, and international subsidiaries.
On-demand UK-based accounts service. Save time, frustration and costs with accurate bookkeeping, VAT and management accounts.
Expert tax guidance from UK-qualified professionals. Optimise your tax position and manage compliance through strategic planning and advisory support.
Comprehensive risk management, technology assurance, governance and internal audit services for CFOs and Finance Directors.
Reduce risks, strengthen negotiations, minimise taxes and improve performance with our fast, flexible advisory team.
Comprehensive payroll management service ensuring accurate, timely, and compliant payroll processing.
Comprehensive business support services including business advisory, consultancy, bookkeeping, VAT compliance, and management accounts.
Expert company secretarial services for UK companies, including Companies House filings, statutory compliance, and corporate governance.
ICAEW-accredited probate and estate administration services with integrated tax planning expertise. Fixed-fee probate services.
Comprehensive operations services including operational excellence, systems implementation, project management, and fee protection insurance.
Comprehensive operations services including operational excellence, systems implementation, project management, and fee protection insurance.
We're a registered audit firm and act as an external auditor for UK PLCs, limited companies, charities, and international subsidiaries.
On-demand UK-based accounts service. Save time, frustration and costs with accurate bookkeeping, VAT and management accounts.
Expert tax guidance from UK-qualified professionals. Optimise your tax position and manage compliance through strategic planning and advisory support.
Comprehensive risk management, technology assurance, governance and internal audit services for CFOs and Finance Directors.
Reduce risks, strengthen negotiations, minimise taxes and improve performance with our fast, flexible advisory team.
Comprehensive payroll management service ensuring accurate, timely, and compliant payroll processing.
Comprehensive business support services including business advisory, consultancy, bookkeeping, VAT compliance, and management accounts.
Expert company secretarial services for UK companies, including Companies House filings, statutory compliance, and corporate governance.
ICAEW-accredited probate and estate administration services with integrated tax planning expertise. Fixed-fee probate services.
Comprehensive operations services including operational excellence, systems implementation, project management, and fee protection insurance.
We're a registered audit firm and act as an external auditor for UK PLCs, limited companies, charities, and international subsidiaries.
About Us
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.
The rebranding to Acumon represents more than just a name change—it reflects our vision for the future while honouring the strong foundation built over many years of dedicated service to our clients.
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, while our turnover has grown from £1.2 million to almost £10 million in the same period.
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.
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.
As a full-service firm of Chartered Accountants, we provide comprehensive services across audit, accounts, tax advisory, and business consulting. Our team includes:
- Audit Services: We are a registered audit firm authorised by the ICAEW, with Responsible Individuals qualified to conduct Public Interest Entity (PIE) audits. Our audit experience includes UK PLCs, limited companies, charities, and international subsidiaries.
- Tax Advisory: Our tax team includes many professionals who have previously worked for HMRC, providing deep insights into tax legislation and compliance. We offer comprehensive tax planning and advisory services for both individuals and businesses.
- Accounts & Bookkeeping: We provide full-service accounts preparation, bookkeeping, and management accounting services, helping clients maintain accurate financial records and make informed business decisions.
- Business Advisory: Our advisory services include due diligence, MBO/MBI support, business valuations, succession planning, and strategic consulting to help clients achieve their business objectives.
- Software Development: Acumon is one of the few UK accounting firms to have a dedicated software development team. Our journey in software development began in 2020 when we hired David Cartwright, a strategic move that positioned us as a firm ready for the future. This investment in technology enables us to develop bespoke solutions, automate processes, and deliver innovative services that enhance efficiency and value for our clients.
Our team of 90+ UK-based professionals brings diverse expertise across accounting, tax, audit, technology, and business advisory. From qualified Chartered Accountants and Chartered Tax Advisors to software developers and business consultants, our team combines traditional accounting excellence with innovative technology solutions.
Many of our tax professionals have previously worked for HMRC, providing unique insights into tax legislation and compliance. Our audit team includes Responsible Individuals qualified to conduct Public Interest Entity (PIE) audits, while our technology team develops bespoke solutions that enhance efficiency and value for our clients.
UK-Based Team: All 90+ of our staff are based in the UK, ensuring quality, accessibility, and a deep understanding of UK accounting standards and tax legislation.
Proven Track Record: Our growth from £1.2 million to almost £10 million turnover demonstrates our ability to deliver value and build lasting client relationships.
Comprehensive Expertise: Our team brings diverse experience across multiple sectors, from technology and manufacturing to charities and high-net-worth individuals.
Regulatory Credibility: As a registered audit firm with ICAEW authorisation and FRC Responsible Individual status, we meet the highest regulatory standards.
Client-Focused Approach: We tailor our services to meet each client's specific needs, providing practical, actionable advice that helps businesses and individuals achieve their financial goals.
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