GTA Accountants & Finance Network

Clayton is a small business advocate, tax ninja, cloud accounting and technology enthusiast, and lifelong student of culture and leadership. Clayton is Achen Henderson's Office Managing Partner and is a Canadian tax specialist and has a background in tax compliance, planning and strategy. He started his career in an international accounting firm's assurance practice and then transitioned into a tax career with a Big 4 firm before co-founding Achen Henderson. He has worked with a wide variety of clients ranging from owner-managed small business to publicly traded oil and gas companies and has testified before the finance committee in the Canadian parliament about tax issues for private companies. He specializes in the taxation of private companies, transactions, and high-net-worth families.

David is a former partner of the large international firm environment, who has broken from the pack to work with servicing clients of the small to medium sized accounting and law firms across the country. David has worked in the practice area for over 25 years and runs his practice from his Calgary office. David has worked in both public practice (Big 4/7) and government and has been instrumental in devising unique indirect tax solutions and identifying savings opportunities for clients, while also managing their indirect tax compliance risks, including many years of indirect tax controversy and audit support.

Located in Calgary, David focuses on the real estate and energy sectors and assists clients in managing their compliance with sales, excise, carbon and fuels taxes. David has also worked with a diverse set of clients across numerous industries from NPO’s and charities through to large multi‐national energy companies. He has the indirect tax knowledge and experience to help solve clients important indirect tax problems. David works closely and proactively with his clients to manage their indirect tax advisory, planning, audit support and controversy.

David is a CPA and CMA and has been a Certified Management Accountant (Alberta) since 1999 and a Chartered Professional Account (Canada) since 2015. He is also a past cochair of the Sales and Indirect Tax committee of Canadian Association of Petroleum Producers. David’s work with this and other committees, he was a liaison between industry and government and engaged in various indirect tax issues, interfacing and working with industry colleagues and government finance and program administration officials. David has published numerous articles, papers and presentations on a variety of indirect tax matters.