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Sunset on the Andean mountains in Cusco, Peru

Welcome to Cooper Arias LLP

Are you looking for a firm large enough to offer a full array of accounting, taxation, auditing and consulting services, but small enough to know you on a personal level? Then look no further than Cooper Arias LLP. The firm started in 1988 as a small one person operation, and has grown today to a staff of 31 in three offices, and includes 9 CPA's, each offering top-notch credentials and experience. Whether you need accounting, auditing, tax planning, estate and trust work, small business consulting, or a full complement of other individualized services, we will give you the full resources you would expect only from a large accounting firm while maintaining the personal touch.

Cooper Arias, LLP has offices in Orange, Rockland and Sullivan Counties to better serve clients in the tri-state area and Hudson Valley.


*The COVID-19 virus has shut down many businesses and is creating a lot of misinformation

It is official that the April 15, 2020 due date for federal returns has been extended to July 15, 2020.There are no additional penalties or interest charges for anyone that owes money and does not pay until July 15, 2020.

What is important to know however, is that this is for income taxes only.Other taxes, such as payroll and sales taxes are fiduciary taxes and are due on their regular scheduled dates.These are taxes that have been withheld from employees or customers to be remitted to the appropriate agency and do not have any deferrals.

More information on assistance available through the CARES Act can be found here and here. Our Resources page is also updated with the most current information and helpful links.


View our privacy policy here.


Member : American Institute of CPAs and New York State Society of CPAs

Tax Center

Our convenient Tax Center provides an array of tax information all in one place. Click here for more information...

Financial Calculators

Our convenient Financial Calculators can help you plan for your future. Click here for more information...

Paycheck Calculators

Click here to use our handy Paycheck Calculators...