Demetrios Demetriou

Head of Back Office

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Accountant | Property Investor | Tax Expert

Demetrios Demetriou brings decades of hands-on experience supporting small and medium-sized businesses with their full range of compliance and advisory needs. Starting his career as a bookkeeper in the mid-1980s, Demetrios is entirely self-taught—a testament to his determination, discipline, and passion for the profession. Today, he is widely respected as a commercially astute accountant who combines technical expertise with practical, business-focused advice.

A highly valued member of The Charles Group, Demetrios is known for his unwavering honesty, integrity, and commitment to putting clients first. His ability to blend commercial thinking with deep tax knowledge has helped countless businesses thrive, while his personal values have built lasting client relationships that have stood the test of time. His dedication has been instrumental in shaping the growth and reputation of the practice over the years.

Outside of work, Demetrios enjoys travelling to Cyprus and is a devoted fan of Apoel Football Club. He is happily married to Georgina and values time spent with family and community.

Areas of Expertise

  • Decades of Accountancy & Business Experience
  • Longstanding Client Relationships
  • Commercial Tax Planning
  • Practical Problem Solving

Testimonials

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After working with Nicholas Charles for a year, we brought him on to join our board advisory team for BankToTheFuture.com because of his unique combination of financial tax advice, commercial understanding and ability to introduce the right connections at the right time. Nicholas has provided tax advice to our investors, facilitated introductions to investors as well as help us to implement controls and procedures to get the right balance of compliance, responsible procedures and good business practices. If you want somebody that understands the commercials of business and deal making combined with the technical skills of finance, tax and increasing shareholder value, Nicholas Charles is your man.

Simon Dixon | CEO & Co-Founder BankToTheFuture.com
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Nicholas has been an active supporter of our charity, and the Charles Group have sponsored our last three summer parties. He understands family businesses like ours but more importantly the need to give back to the local community and the life changing differences that can be brought about by charities. This is why we quickly became a client of the Charles Group. Nicholas appreciates that having a purpose greater than the individual needs of members can bring a family closer together as well as inspire the next generation. We admire Nicholas’ authentic approach towards Family Prosperity.

Paul Strank MBE and Irene Strank MBE | Founders of Paul Strank Roofing and the Paul Strank Charitable Trust
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I have worked with the Charles Group for 2 years on some very exciting projects and his ability to listen, provide objective advice and support my goals and ambitions has been a tremendous asset to me and my businesses. Nicholas cares deeply about those he works with and seeks to ensure great outcomes for all.

Penny Power OBE | Serial Entrepreneur
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The Charles Group has been our trusted accountants since we founded B-Engaged in 2013. Over the years, they’ve become an integral part of our journey, consistently going above and beyond to help us save money, optimize our structures, and minimize tax liabilities. They are more than accountants—they are key partners in our success.

Ehsen Shah | Founder and CEO of B-Engaged: Sports Marketing Activations Agency
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From our early days as a startup to becoming one of the largest suppliers to Assos and River Island, The Charles Group has been a constant and invaluable partner. They’ve played a vital role in reducing our overheads, analysing and advising on client profitability, setting up our internal bookkeeping systems, and providing invaluable business guidance. Their expertise has also helped us manage and reduce our growing tax liabilities. The team at The Charles Group has truly become part of our business family.

Gabby Chrysanthou | Director and co-founder of Loaded London