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Business Details
46 Years
experience
Trusted Accounting & Tax Services in London
Established in the late 1980s, Ratnam & Co & Co has grown into one of Northwest London's leading accountancy practices. Our firm builds upon decades of combined experience from our lead professionals, offering tailored financial solutions to businesses and high-net-worth individuals. We specialise in complex tax investigations, having successfully represented clients against HMRC on multiple occasions. Our services span annual accounts, payroll management, and strategic business advisory, supported by cloud accounting technology for real-time financial insights.

With a client base built on trust and dependability, we maintain a loyal following through our commitment to compliance, transparency, and personalised service. Our team's expertise in international finance and property tax planning ensures comprehensive support for diverse client needs. We prioritise understanding each client's unique circumstances to deliver actionable advice that drives business growth and financial security.
Services
Annual accounts Bookkeeping Business start-ups Company secretarial CIS services Corporation tax Making Tax Digital Payroll management Self-assessment VAT returns
Details
  • Year established: 1980
Highlights and features
  • We have over 30 years' experience in UK and international accountancy services
  • Our team successfully handles complex HMRC investigations and tax disputes
  • We implement cloud accounting systems for real-time financial management
  • We provide tailored business start-up support with tax-efficient structuring
  • Our client retention rate exceeds 90% through personalised service delivery
What people say
Exceptional services Knowledgeable team Reliable partner Game-changer Top-notch service
Services
Annual accounts
We prepare statutory accounts for Companies House and HMRC submissions. Our service includes financial analysis, cash-flow projections, and compliance checks. Businesses benefit from early preparation to ensure regulatory compliance and informed financial decision-making.
Bookkeeping
Cloud-based bookkeeping services with monthly reporting. We manage data entry, reconciliations, and VAT returns. Clients gain accurate real-time financial insights while focusing on core business operations without compliance concerns.
Business start-ups
Comprehensive start-up support including company formation, tax structure advice, and business planning. We help new businesses establish proper accounting systems and access appropriate financing options for sustainable growth.
CIS services
Specialist Construction Industry Scheme compliance services. We handle contractor and subcontractor registrations, monthly returns, and tax deductions. Clients receive expert guidance to meet CIS requirements while optimising tax positions.
Corporation tax
Corporation tax return preparation and compliance services. Our experts explain tax liabilities clearly and implement planning strategies to reduce liabilities. Businesses receive proactive support for HMRC compliance and tax-efficient operations.
People
Sam Ratnam
Founder
Chartered Accountant with 40+ years' experience. Established Ratnam & Co & Co in the late 1980s after working with HMRC and international financial institutions. Recognised for successfully challenging HMRC in complex tax cases.
Gopin Ratnam
Partner
Experienced business advisor specialising in strategic financial solutions. Focuses on delivering creative solutions that address business challenges while maintaining compliance with regulatory requirements.
Questions
What accounting services do you offer for small businesses?
We provide annual accounts preparation, bookkeeping, payroll management, and tax compliance services specifically tailored for small businesses.
How do you handle HMRC tax investigations?
Our experts with 40+ years' experience represent clients in tax disputes, having successfully challenged HMRC decisions in complex cases.
Do you support business start-ups?
Yes, we offer comprehensive start-up support including company formation, tax structure advice, and business planning services.
Are you compliant with Making Tax Digital requirements?
Yes, we use compatible software to ensure all VAT and income tax filings meet HMRC's digital requirements.
What areas do you cover?
Primarily serving Northwest London, with clients across the UK and internationally through our cloud accounting systems.