Stephen Challinor, CPA
Licensed CPA — Illinois · Founded ProCFO BTS 2024
Previously: Accounting & Valuation Services Ltd (founded 1980s)
A career built on depth,
not breadth.
ProCFO Business and Tax Services was founded in 2024, built around the expertise Stephen Challinor has spent a career developing. Stephen founded his first Illinois CPA firm in the 1980s and has navigated every major shift in federal and state tax law since.
Stephen Challinor founded his first Illinois CPA firm in the 1980s — Accounting & Valuation Services Ltd, covering tax, accounting, and business valuation. Over decades of practice, he recognized where his clients needed him most: tax and accounting. He deliberately focused there and never looked back.
The result is a practice defined by depth. Stephen has navigated every major shift in the tax code since the Reagan era — the Tax Reform Act of 1986, the ACA's business implications, the Tax Cuts and Jobs Act of 2017, and everything since. His clients don't have to keep up because he does it for them.
"Tax software is good at math. It doesn't know that you have a home office, that your car qualifies for a deduction, or that your side business changed your filing situation. A CPA does."Stephen Challinor, CPA · Founder
Earned CPA License & Founded First Firm
Licensed as a Certified Public Accountant in Illinois. Founded Accounting & Valuation Services Ltd, his first CPA practice, covering tax, accounting, and business valuation.
Four Decades of Continuous Practice
Federal, state, corporate, individual, and nonprofit tax across every major code change of the modern era, navigating complexity so clients don't have to.
Founded ProCFO Business and Tax Services
A purpose-built firm focused on tax and accounting for individuals, businesses, and nonprofits. Modern tools, deep expertise, and year-round partnership.