Colmer Winchester

Established in 2015, Colmer Winchester are a small, but established and growing firm of Chartered Certified Accountants based in Oxfordshire, providing finance expertise and business advice to SMEs. As trusted advisors to business owners, finance heads and entrepreneurs, our ethos is to place ourselves at the core of our clients’ businesses, actively collaborating and delivering insight that makes a difference. We enjoy getting to know the clients we help, and care deeply about their success. Not ‘just’ an accountancy practice, we support businesses on their journey from start-up, to growth and those in crisis. All informed by the latest finance technology – we are proud to be Xero Gold Champions - together with broad experience and knowledge of what leads to business growth. Our small, friendly team comprises co-founders Phil Colmer ACA and Andy Winchester FCCA, who have supported over 150 local (and not-so local!) SMEs to grow and succeed. Whether that’s using the latest technology to automate processes, provide an outsourced finance function, or leading growing businesses through VC funding rounds and more. In 2019, we were joined by Kate Holden ACA, who brings significant industry experience, business transformation expertise and a strategic vision. Harriet and Marianna make up the team – they make sure our clients are well supported at every interaction. How can we help your business? Whether it’s getting the key accounting fundamentals in place, re-engineering your business and finance processes, outsourcing your finance function or seeking funding rounds – we have it covered. Please get in touch to find out more – you can contact us on 01235 854086 and go to for the full range of services we offer.