Business Meeting

G Henderson & Co is a firm of Public Accountants & Registered Tax Agents located in Mona Vale / Warriewood

on Sydney's Northern Beaches. We provide accounting and tax services to Individuals and Businesses. 


G Henderson & Co are local accounting and taxation professionals who offer a wide range of services including income tax returns, financial and management accounting, bookkeeping and cloud accounting support, SMSF, company compliance, business startup and advice, just to name a few.

Rob P.
Director - Business Owner

"I have used Henderson and Co  the past 4 years for both my personal and business tax and they have been exceptional. I am constantly impressed by the timeliness, communication and attention to detail of their services. Horst is incredibly well informed and provides the personalised experience you look for in an accountant. My family and I could not be happier and have no reservations in recommending their services."

Sharon P.
Business Owner

"I strongly recommend Horst. He has fixed up all my financial paperwork in an easy and friendly manner. Nothing is too hard for him. He answers any questions that I may have (and I have plenty)! I wouldn't hesitate in taking my books to Horst for him to look at and advise. The best accountant I have ever used."

Jason & Nerida Y.
Business Owners

"Horst and the team at

G Henderson & Co have played a key part in the management of our business and personal financials for more than 12 years, including supporting us in transitioning to a digital accounting system.

Horst is always ready to step in with support and advice so that we can focus on running our business."

Stuart G.
Entrepreneur & Business Owner

“G Henderson provide great advise as well as accurate financial statements and tax returns. They are responsive and helpful and always provide me with the answers I need when I need them.”

Mike O.
Business Owner

"Strongly recommended. Horst has helped me ensure I set up my sole trader business correctly including accounting software, BAS submissions and GST advice. 3 months in to working with Horst, my business finances are nicely in order, I'm in an easy to manage routine to keep everything up to date and Horst is always at hand with strong and timely advice as needed."

Michael L.

"I have been a client Of Horst Holzinger at G Henderson and Co for the last 6 years.
In support of my work developing several businesses over that time, including a business purchase, a sale, and complex merger and acquisition activity, Horst has been a great accountant, a great adviser, and generally a great sounding board.
The latter point being especially relevant when supporting the appropriate financial management processes for each business respectively.
I would recommend Horst for any new client relationship, based on the diverse set of values and skill sets he consistently provides."


We invite all new prospective business clients, who are looking for an accounting professional, to a free face-to-face initial 1/2 hour consultation, call us today on 02 9979 2660 to make an appointment.