About Us

Accountants based in Newmarket

Xtax tailored for your Accounting Needs

Xtax was founded in 2003 by Jon Sadler, following 12 years of experience at HMRC. Jon specialises in Personal Tax and property issues. Xtax has built an experienced team of professionals, here to serve all of your accountancy needs in Newmarket and surrounding. All of the Xtax team are highly competent, experienced, professional and friendly. With our combined experiences, you can be assured that your accountancy needs are in safe hands.

We pride ourselves on our commitment to provide a professional service at all times, whilst maintaining the highest quality of work. Xtax is here to support you and take care of all of your accountancy needs, we work on a fixed fee basis with no hidden charges and free telephone advice for existing customers. We have worked with a wide range of businesses and individuals, giving us valuable skills and experience.

Xtax is committed to delivering maximum value to our clients

We continually monitor, update and improve our services, but our way of working remains the same.

  • Understanding your ideas, needs and aspirations
  • Clear thinking to help grow your business/personal wealth
  • Communicating with you effectively
  • Professionalism delivered by a team embracing excellence

You can have confidence in the support from a dedicated team, who will manage and take responsibility for providing the best accountancy service and solutions possible.

Meet The Xtax Team

Our team are professional, experienced and friendly. We are here to support you every step of the way.

Jon set up Xtax in 2003, following 12 years of experience at HMRC. Jon has a wealth of knowledge in personal taxation, tax planning and capital gains issues. Jon also has extensive experience in assisting clients with both residential and commercial property/land purchases. Outside of work, he likes to get out on the golf course and enjoys running.

Jonathon Sadler – Director

Corinne joined Xtax in 2008 after 20 years of experience at HMRC. ‘Corinne deals with all aspects of payroll/auto enrolment pensions, VAT and the Construction Industry Scheme. She enjoys holidays and yoga/pilates practice.

Corinne Sadler – Director

Louise qualified as a Chartered Certified Accountant in 2008, after completing her training with an Accountancy practice in Cambridge. Louise joined XTax in 2011 and specialises working with corporate clients. Louise enjoys spending time with her young family, shopping and socialising.

Louise Kennedy – Accountant

Andy has been a management accountant for over 30 years and has hands-on experience of day to day bookkeeping, payroll, VAT and preparation of management accounts. Outside of work, Andy is a keen season ticket holder at Norwich City.

Andrew Gibson – Accountant

Anthony is CIMA (Chartered Institute of Management Accountants) qualified and joined the Xtax team in 2012. Ant works with corporate and self-employed clients. Ant has a keen interest in cycling and golf outside of work.

Anthony Preece – Accountant


Tracey joined Xtax in April 2015. Tracey deals with a variety of administration tasks and we’re not sure how we coped without her! Tracey enjoys time with her family, meals out and catching up with friends.

Tracey Achner – Admin Assistant 

The latest addition to the team Brian Smith has a wealth of experience in all aspects of accounting, business advice, and cross border taxation. Brian has a Business Studies honors degree (British), majoring in accounting and marketing, with a wide range of experience, over 30 years, in the manufacturing, engineering, and project management sectors in Europe, UK, Ireland, Denmark, USA, and Japan. Most recently returned from a 13-year working sojourn in South Africa. Brian works closely with start-up and growth companies and specializes in due diligence, business valuation, business plan writing, presentation to investors, and post-investment management of financial reporting. Outside of work Brian plays hockey, enjoys cycling, reading, and learning.

Brian Smith 

Jo is a Chartered Certified Accountant (FCCA) with over 20 years of experience working in both practice and industry (Oil & Gas and Pharmaceuticals). More recently, Jo has studied for a Masters in Business Administration (MBA), gaining a distinction grade. Jo joined Xtax in 2018 and specialises in working with small companies. Free time is mostly taken up with her 2 young children, but hobbies include yoga, going to the gym and a spot of shopping!

Jo Cosgrove – Accountant

Marie has over 20 years’ experience as a tax accountant and became a member of the Association of Taxation Technicians in 2002.  She is also a member of the Institute of Certified Bookkeepers. She specialises in preparing accounts and tax returns for individuals, self-employed, landlords, trusts and estates.  Marie loves to travel and tries to go to new destinations whenever possible. In her spare time, she enjoys trying out new recipes in the kitchen and socialising with friends.

We have a great relationship with the staff at Xtax and often refer our landlord clients to them, confident in the knowledge that they will handle their affairs efficiently and professionally. We have worked with Jon on several large land transactions and his knowledge proved invaluable in the recent sale of a £2million development, however he is more than happy to assist in the smaller projects, such as homeowners selling off part of their garden for redevelopment.

~ Rob Lewis &, Balmforth Estate Agents

As a Newmarket based business, I was looking for a local accountant who would understand my business needs and offer a more individually tailored approach. Xtax deal with my accounts, VAT and payroll. Louise is very approachable and knowledgeable and I know my tax affairs are in good hands with Xtax.

Gary Witham, Newmarket Sports

Anthony at Xtax has been our accountant for the last 5 years. Knowing that our accountancy affairs are being looked after by Anthony gives us the peace of mind to focus on our day to day business operations. The whole team at Xtax are friendly and helpful and we hope to work with them for many years to come!

Janet Harris, Harris Steel Services Ltd

Xtax Accountancy Services have been my accountants for over 13 years. From being self employed, Xtax has steered me in the right direction to grow my business in the most efficient way, to the successful limited company it now is. Jon, Louise and Andy are always on hand to give help and advice and I have recommended several other clients to them over the years with no hesitation.

~ Nick Sebastian, Sebastian Brickwork Ltd

What Our Clients are Saying

Providing a proactive approach to support you and help grow your business.

From Our Facebook

Why Switch to Xtax

We have been the foundations of many sole-traders and companies based in Newmarket & around the UK.
Our fair fixed price policy has allowed our customers to flourish whilst we maintain their accounts.
Switch to Xtax today and worry no more!

Contact Information

Call us on: (01638) 482 624

Email us at: jon@xtax.org.uk

Our Address: 8 Abernant Drive, Newmarket, Suffolk, CB8 0FH

© Copyright 2018 Xtax Accountancy Services Ltd
Company number 08429206