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Business Details
47 Years
experience
Trusted Accounting and Tax Advisory Services in London
Established in London in 1979 by George Mouktaris & Co & Co, our team of proactive and reliable accountants supports clients locally and globally. With over four decades of experience, we prioritise professionalism, expertise, and relationships to foster client success. Our services span accounting, taxation, and advisory, tailored to entrepreneurs, owner-managed businesses, and international entities. We specialise in financial clarity, timely guidance, and bespoke solutions for wealth preservation and business growth. Our teams deep understanding of UK and international tax landscapes, coupled with technological innovation, positions us as trusted advisors.

We maintain membership with the Institute of Chartered Accountants in England and Wales (ICAEW), ensuring adherence to rigorous professional standards. Our international reach, supported by multilingual capabilities, enables comprehensive solutions for clients in sectors like IT, e-commerce, and property. Client testimonials highlight our proactive support, technical excellence, and commitment to long-term partnerships. We combine sector-specific knowledge with a client-centric approach, ensuring tailored advice for both corporate and private clients.
Services
Accounting Audit and Assurance Cloud Accounting Company Formation Forensic Accounting Payroll Services Personal Tax Corporate Tax VAT Advisory R&D Tax Relief
Details
  • Year established: 1979
Highlights and features
  • 40+ years of expertise in UK and international tax landscapes
  • Personalised, client-focused advisory services with multilingual support
  • Cloud accounting specialists enabling real-time financial management
  • Proven track record with entrepreneurs and complex international structures
  • Proactive compliance and strategic planning for wealth preservation
Associations and certifications
  • Institute of Chartered Accountants in England and Wales (ICAEW)
What people say
Highest recommendation Essential partners Timely guidance Proactive and reliable Dynamic service range
Services
Accounting
We provide comprehensive accounting services, including statutory financial statements, cloud accounting, and bookkeeping. Our team ensures accurate financial reporting aligned with UK and international standards. Clients benefit from real-time data integration, enabling strategic decision-making and compliance with regulatory requirements.
Tax Planning
Our tax planning services cater to UK and non-UK domiciled clients, focusing on inheritance tax, corporate tax, and international tax strategies. We deliver tailored solutions to optimise tax efficiency while ensuring compliance with evolving regulations.
Audit and Assurance
As registered auditors, we conduct statutory and non-statutory audits to assess financial health and internal controls. Our reports provide stakeholders with confidence in financial accuracy and operational effectiveness, adhering to ICAEW standards.
Cloud Accounting
Our cloud accounting solutions streamline financial management through real-time data access and automation. We implement systems like Xero and QuickBooks, offering clients interactive dashboards, cash flow forecasting, and seamless HMRC compliance.
R&D Tax Relief
We assist tech and R&D-focused businesses in claiming tax relief for innovative projects. Our services include eligibility assessments, HMRC compliance, and advance assurance to maximise refunds or tax credits for qualifying expenditures.
People
George A Mouktaris
Principal and Founder
George founded Mouktaris & Co & Co in 1979, bringing over 40 years of experience in accounting and tax advisory. He specialises in corporate finance and international tax planning, guiding clients through complex regulatory landscapes.
Eliana OShea
Personal Tax Manager
Eliana leads our personal tax division with 25+ years of expertise in UK tax compliance and wealth preservation. She advises high-net-worth individuals and non-domiciled clients on inheritance tax and cross-border tax strategies.
Anastasis G Mouktaris
Business and Tax Adviser
Anastasis provides strategic tax and business advisory services, focusing on entrepreneurs and tech startups. His expertise includes R&D tax relief, corporate restructuring, and international expansion planning.
Questions
What accounting services do you offer?
We provide statutory financial statements, cloud accounting, bookkeeping, and real-time financial reporting tailored to startups and growing businesses.
Do you specialise in tax planning for non-UK domiciles?
Yes, we offer bespoke tax planning for non-UK domiciliaries, including remittance basis claims and clean capital segregation.
How does cloud accounting benefit my business?
Cloud accounting enables real-time financial management, automated reporting, and seamless collaboration to enhance decision-making and efficiency.
Can you assist with company formation?
We guide clients on optimal business structures and handle UK/offshore company formation, including secretarial services and bank account setup.
What payroll and HR services are available?
We manage end-to-end payroll, CIS payroll, pensions auto-enrolment, and compliance with HMRC regulations.
Do you support R&D tax relief claims?
Yes, we help technology and innovation-driven businesses claim R&D tax relief, including advance assurance and compliance statements.