2024 Inflation Adjustments
On November 9, 2023, the IRS issued Revenue Procedure 2023-34, announcing the 2024 inflation-adjusted amounts for various tax items.
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Our professionals provide assurance, tax, and advisory services to clients locally, regionally and across the nation.
Audit & Other Assurance Services
Our audit and assurance services identify opportunities to improve accounting information systems, tighten financial control, and, ultimately, enable management to obtain the most accurate information for making strategic decisions.
Tax Services
Our firm is a leader in tax compliance and sophisticated tax planning strategies. The scope of our tax practice goes far beyond routine tax return preparation for businesses, individuals and trusts.
Advisory Services
Our consulting professionals have substantial experience and are committed to providing clients with valuable information to help them make the best business planning decisions.
Industries & Specialties
Utilizing a niche team approach and organizing around your unique industry enables us to develop an in-depth understanding of your business.
Locally Owned, Serving Pittsburgh & Beyond
Sisterson was founded in Pittsburgh, Pennsylvania, and our headquarters is still located downtown in the city's first skyscraper, the Grant Building. Our firm has lived through the Great Depresson, the rise and fall of the steel industry, and the emergence of the technology sector in our city. We proudly serve clients outside of the region and around the country but we are truly a Pittsburgh-based firm.
A Rich History of Success Since 1926
Today, we we stand atop the shoulders of our founders, our employees, and all of the valued clients we’ve served, as we prepare to usher in our next hundred years. We’re proud of our history. And we’re thrilled about our future.
Firm Culture
One firm, one office, one mission. The employees and partners of Sisterson work out of one office, in the Grant Building, in downtown Pittsburgh.
Life at Sisterson
Our collaborative environment, work-life balance and commitment to the non-profit community.
Meet our Team
For 96 years, our professionals have served clients large and small with the same standard of service.
View Open Positions
Sisterson is very interested in recruiting and retaining individuals committed to providing and supporting quality client service.
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IRS suspends processing of ERTC claims
In the face of a flood of illegitimate claims for the Employee Retention Tax Credit (ERTC), the IRS has imposed an immediate moratorium through at least the end of 2023 on processing new claims for the credit.
Before Your Nonprofit Celebrates That New Grant ...
Most not-for-profits believe they cannot afford to turn down offers of financial support. At the same time, such organizations should not blindly accept funding simply because it is offered. Some grants may come with excessive administrative burdens, cost inefficiencies and lost opportunities.