Oxford accountants, tax and business advisors
We turn financial confusion into confident decisions. Expert accounting and tax advice for businesses and individuals.
Clear advice.
Smarter decisions.
Better results.
Focused on your financial future
We're an independent, ICAEW-registered chartered accountancy practice in Oxford — not a national firm or franchise. We're small enough to know every client personally, with twenty years of experience in complex tax and accounting work for limited companies, small businesses and private clients.
What our clients say
Simon has been a huge help to our business since its formation in 2017. He is knowledgeable, friendly, and always quick to respond. He comes with the highest recommendations.
Simon has been an invaluable help at Inner Citadel, always making our accounting processes smooth and stress-free. He takes the time to explain everything clearly, ensuring we fully understand our finances.
Meet the founder
Simon M. Antonis, FCA is the founder of Simon Maughan & Co. He began his career at KPMG and has spent two decades helping businesses of all sizes make sense of their finances, from personal tax returns to limited company accounts and complex financial structures. He is a Fellow of the Institute of Chartered Accountants in England and Wales, the most senior designation ICAEW awards. If you become a client, that experience is what you get, directly.
Your local Oxford accountant
Our practice in North Oxford, between Jericho and Summertown. We're independent and local, working with clients across Oxfordshire and nationally. Happy to meet at our Oxford practice, visit you at your premises, or work together remotely, whatever suits you best.
Whether you are looking for a personal tax advisor or a business accountant, we can provide a personalised service backed by real local expertise. Pictured: our office on Warnborough Road.
Services we offer
Company formation
Starting a business is exciting — but picking a name is the easy part. The real decisions are structure (sole trader or limited company) and getting your limited company set-up right from day one. We'll walk you through it, and help you plan for growth from there.
Set up your company
Corporation tax, VAT & employer tax services
Business taxes can be tricky, but we make them simple. We handle corporation tax, VAT and employer taxes for limited companies, and make sure you're not missing reliefs like capital allowances or R&D tax relief.
More about business tax
Personal tax planning and advice
Life transitions call for smart tax planning, whether you're receiving an inheritance, investing, trading, or changing careers. We handle self-assessment tax returns and help manage capital gains and inheritance tax, so you stay compliant and keep more of what's yours.
More about personal tax
Cloud accounting
Keeping track of finances doesn't have to be a hassle. We set up and manage Xero, QuickBooks, FreeAgent and others, so your transactions are categorised automatically, your reports stay real-time, and you remain compliant with Making Tax Digital.
More about cloud accounting
Business and CFO advisory services
Whether you're a start-up, scale-up or established business, we give you strategic financial guidance without the cost of a full-time CFO. For founders, that covers the decisions that are expensive to undo: SEIS/EIS and EMI options, share structure, and getting investment-ready.
More about CFO advisory
Year-end accounts
We prepare your year-end accounts accurately and on time, keeping you compliant with HMRC and Companies House. We'll also file your corporation tax return alongside them, so both are done together.
More about year-end accountsSmall business accounting and tax services
Designed with small businesses and limited companies in mind. From company formation, payroll and compliance through to growth planning.
View small business accounting servicesAccountant for contractors and consultants
Expert support for contractors, freelancers and consultants. Set up a limited company, navigate IR35 regulations and optimise your tax efficiency.
View contractor accounting servicesGet in touch
Book a discovery call to talk through how we can help with personal tax or business accounting.
Contact us