About us

Cox Costello & Horne has established itself as a leading regional accountancy firm. Based in Rickmansworth,
Hertfordshire we offer the breadth and experience of a larger practice whilst retaining the personal touch.
We pride ourselves on a high level of partner involvement in all our clients’ affairs.

For many years we have offered our clients fixed fees, so that you will never be surprised by an accountancy bill again.

We take satisfaction in ensuring that clients get our full attention and we endeavour to answer their questions quickly and comprehensively. Our aim has always been to provide a professional and friendly service to all our clients.

Our Background

Formed in 1997 by Mike Cox and Dermot Costello, we now have a team of  thirty professionals helping our clients with their tax and business requirements. We invest in our team to ensure a highly motivated and qualified workforce. Employing the latest systems, software and tools to help us deliver an excellent service to all our clients.

The Directors have a proven track record helping clients, from large multinationals to individuals who require assistance with their Tax Return. Unlike most firms of accountants, our Directors have a wide range of professional qualifications between them, which mean that we can identify the person most suited to assist with our clients’ requirements.