Oxford-based accounting practice committed to providing exceptional accounting services and strategic business guidance.
We work with both individuals and small to medium-sized businesses.
Meet the founder
Simon M. Antonis
Founder and Director, FCA

Simon M. Antonis
Founder and Director, FCA
Simon's love for numbers and helping people has shaped his 20-year career in finance. After qualifying as a chartered accountant in 2007, he worked with KPMG in Edinburgh, gaining experience with businesses of all shapes and sizes. Today, he is a Fellow of The Institute of Chartered Accountants in England & Wales (ICAEW), bringing deep expertise to his work.
Simon uses his skills to help businesses and individuals make sense of their finances, offering clear advice that cuts through complexity. He also serves as a board member, where he plays a key role in designing financial structures for clients, ensuring both compliance and efficiency.
At the heart of Simon's work is a simple goal: to make financial management less stressful and more understandable for everyone he works with.
Working together

Based in central Oxford (OX2), our accounting practice brings expert financial support to businesses across Oxfordshire and the wider UK, including clients in Oxford, Abingdon, Witney, Didcot, Bicester, Banbury, London and Henley-on-Thames.
Whether you're an individual seeking tax advice, a startup or an established business, we'll help you find the right approach to support your needs and business goals.
What our clients say
When our charity's revenue increased to a level that required its annual return to be independently audited, we embarked on a search to identify a suitable firm. Simon Maughan & Co came highly recommended, so we decided to engage with them. We have never looked back.
Simon's professionalism and reliability make working with him a pleasure. I highly recommend Simon for anyone looking for a trustworthy and supportive accountant.