Recognized as one of the top accounting firms by the Philadelphia Business Journal

Isdaner Recognized on Top 25 Accounting Firm List: One of the Few Independent Locally Owned Firms In Philadelphia area.

Named a 2016 top ranked accounting firm by Advisory HQ

Learn about some of the factors which led us to be named as one of Advisory HQ's 2016’s top 11 accounting firms in Philadelphia.

A membership with MSI Global Alliance

Isdaner & Company, LLC is a member firm of MSI Global Alliance, a leading international association of independent professional firms.

Our only business is your business.


Isdaner & Company specialists provide accounting and tax services as well as: litigation support, trust & estate services, employee benefit plan audits, business consulting & auditing.


Our CPAs, CFEs and MBAs provide accounting and business services to clients in healthcare, long-term care, nonprofit, government, real estate, manufacturing and distribution, retail, construction & other business sectors.


Isdaner & Company, a Philadelphia area accounting firm, has a variety of resources available for your use. Feel free to browse through articles staff wrote and presentations we offered. Check out our list of State Agencies as well as tax information. Read the latest issue of our enewsletter, Isdaner Insights.

Sign up for our Newsletter & Tax Alert

Read the latest Isdaner Insights or Tax Alert.

Headlines from December 27, 2016 Isdaner Insights: Change in Some Filing Due Dates, IRS Publishes Travel Per Diem Rates for Fiscal Year 2017, Tax-Advantaged Ways to Help Educate the Grandchildren, Meal Deductions: Tax Rest for the Weary, and Decrease the Chance of an IRS Audit

Isdaner in the News

Things to come? A look at Trump’s and House Republicans’ tax proposals

November 15, 2016

Beginning Jan. 20, 2017, the Republican Party will be in control of both houses of the U.S. Congress as well…

Read our Blog

New Tax Due Dates & Extension Periods for Most Entities for Tax Year 2016!

December 6, 2016

As part of the highway funding bill passed in July of 2016, many tax return due dates are changed. The…