About Lumsden McCormick

About Lumsden McCormick

Trusted CPAs for Over 70 Years.

With over 160 employees dedicated to serving Western New York and beyond, Lumsden McCormick is one of the leading certified public accounting and consulting firms in the state and is Buffalo, New York’s largest locally owned independent certified public accounting firm.

Our practice extends beyond traditional CPA services, offering specialized expertise in areas such as succession planning, corporate restructuring, due diligence, cash flow management, and managing operational financial risk. By maintaining dedicated service teams, we ensure every client receives insight and guidance tailored to their unique industry, goals, and circumstances.

Our People Peer Review Report

BDO Alliance

Global Reach, Local Commitment.

Lumsden McCormick is an independent member of the BDO Alliance USA (the Alliance), one of the nation’s largest associations of accounting and professional service firms. This partnership provides our clients with access to a nationwide network of knowledge, tools, and resources without compromising the personal attention, responsiveness, and trust that define our firm. Through the Alliance, we expand our capabilities while staying rooted in the Western New York community.

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Philanthropy

At Lumsden McCormick, community impact is more than a commitment — it’s who we are. Through contributions, sponsorships, and volunteer service, we support hundreds of civic and charitable organizations. Our employees lead and serve on nonprofit boards, participate in food drives, deliver hot meals, and contribute to campaigns for local organizations. Together, we give not only money, but time, energy, and leadership to strengthen the communities we call home.