Thinking Beyond Numbers

Serving our clients with integrity, trust and professionalism for over 70 years.

When you put your business or personal financial interests in the hands of McCay Duff ’s professionals, you can rest assured that everything is done with your best interests in mind.

As your trusted advisors, we strive to give you personalized service tailored to your specific needs. Whether it is helping you or your company maximize wealth and minimize taxes, or helping your not-for-profit meet statutory requirements and reach its own goals, we improve accountability and are always there for you.

Accounting and Assurance

Our team of professionals will work with you to present a clear and accurate picture of your financial position so you can make sound financial decisions.

Business Advisory

 Our business advisory specialists can assist with launching, buying or selling a business, shareholder agreements, business valuations and much more.

Estate and Succession Planning

With our intimate knowledge of the tax system, McCay Duff is the perfect choice for estate, financial and succession planning services.


We build our service around you and your needs.

We serve a wide range of industries

From automotive, advertising and retail industries to medical professionals, developers and dairy producers, McCay Duff’s financial specialists are proud to service a broad Canadian cross-section of clients. Regardless of your personal or business interests, we can give you the financial advice – and peace of mind – that you deserve.

Tax Services

Our team of tax professionals will work with you to ensure the tax system works in your favour.

Valuations & Consulting

We offer a variety of advisory services including business valuation, litigation support and forensic accounting.

Expert Articles

Our team of professionals regularly write and publish articles providing relevant financial information on a wide range of industries.


What sets us apart ...

Established in 1946, McCay Duff, Chartered Professional Accountants has become synonymous with integrity, trust and professionalism in the National Capital Region. We provide a full suite of accounting services to a broad list of clients from a wide range of sectors.


We are committed to keeping you informed to ensure you have peace of mind.


We focus on the big picture—we set you up for success and make your life easier by taking care of all of your accounting and financial-services needs.


Our competitive rates make success achievable and affordable.


Our team approach ensures you get the best service and advice possible.


As your trusted advisors, we strive to give you personalized service that is tailored to your specific needs. 


Our easy-to-find downtown location makes working with us convenient.

What Clients are Saying

We take pride in helping you achieve results.

Serving Businesses for Over 70 Years

Providing excellent service to our clients is of utmost importance to our team. See what our clients have to say about our services.

McCay Duff has been at my side for more than 20 years, through good times and bad. Not only do they provide great accounting services, but I know I can count on them to give me sound and reasoned financial advice, the kind that lets me sleep well at night.

President, Voice Innovate Corporation

As a small-business person, it seems I am constantly reacting to changing circumstances. The people of McCay Duff are always there when I need them—they always find the time to meet with me, discuss the issues and give me valuable, helpful advice.

President, AMS Imaging Inc.
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