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Trusted by Alberta's Business Leaders

Relationships built on precision, trust, and over four decades of proven financial performance.

R. Derrick Colling Professional Corporation office

A Legacy of Financial Excellence

Since 1982, R. Derrick Colling Professional Corporation has been the quiet financial engine behind many of Sherwood Park and Edmonton's most successful enterprises. In an industry where trust is paramount, our greatest asset is the longevity of our client relationships. We don't just act as tax preparers; we serve as lifelong financial partners.

Read what our long-term clients have to say about our commitment to their financial health, corporate governance, and personal wealth preservation.

What Our Clients Say

★★★★★

I've been working with my accountant for the past 16 years, handling both my business and personal taxes. Throughout all these years, their professionalism, accuracy, and reliability have been exceptional. They have always been responsive, knowledgeable, and willing to go the extra mile to make sure everything is done properly and on time. It's a great comfort to know my finances are in such capable hands. I truly appreciate the long-standing support and highly recommend their services.

Jana IyerGoogle Review · 5 stars
★★★★★

I was planning to refer Derrick to a colleague but came across a previous review, which I found surprising. He is a bit old school, he provides all the necessary documents by mail, complete with envelopes and stamps for returning signatures. He keeps a copy for his records to file electronically and one for the client. My husband and I have been using his services for years, and he's always been informative and helpful, especially when guiding us through our future business plans. I highly recommend him.

Lexy EBBB Accredited Review · 5 stars · August 2025