One Firm. One Vision.

We are pleased to announce that Insero & Company CPAs, P.C. and Ciaschi, Dietershagen, Little, Mickelson & Company, LLP have merged to form Insero & Co. CPAs as of January 1, 2016.
Click here to read the full press release.

The same quality service team you already know
Over 125 team members in Ithaca, Cortland, Watkins Glen, Corning, and Rochester
Global reach, national strength, and local presence
Deep technical bench
Industry experience in government, not-for-profit, family businesses, employee benefit plans, and outsourced accounting

About You

Choose the option below that best describes you to learn how we can assist you



I am an owner or Employee of a business

From privately-held family businesses to multi-national corporations, our team can deliver the expertise you need with a service model you'll love.

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Government and
Not-for-Profit Agencies

I represent a Government or Not-for-profit Agency

Whether your organization needs an audit or you could use expertise beyond your own staff, our specialists are here to help.

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I am an individual with personal accounting needs

If you're looking for personal accounting services, from tax preparation to estate planning, our team will partner with you to help you meet your objectives.

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About Us

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Join the Team

Take your career to a higher standard

At Insero, you're not just a number, you're an individual with aspirations. Learn why we're the #1 Small Business Top Workplace in Rochester and one of the Best Accounting Firms to Work for in the U.S.

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Meet the Team

meet our leadership team

Our partners, principals, and managers are committed to providing you with the expertise you need and the quality of service you deserve.

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You Deserve The Highest Standard

Insero & Co. CPAs has grown into one of the premier public accounting firms in Western, Central, Upstate, and the Southern Tier of New York through uncompromising commitment to serving clients through hard work, tenacity, passion, and focus. Whether through audit, tax, outsourced accounting, risk management, or business advisory services, you can count on us to listen to your situation, deliver solutions to your challenges, and bring you the ideas to take you and your business to the next level of success. Please, explore our site and learn more about Insero's promise to deliver our clients The Highest Standard.