Accounting firms in Pittsburgh: 812 offices, a market weighted toward CPA firms, and Pennsylvania's firm license rules

This page is for western Pennsylvania businesses, nonprofits and households choosing an accountant, accountants and students sizing up local employers, and companies that sell to accounting firms. It covers the Census count, the mix of firm types, Pennsylvania's firm licensing law, the IRS preparer file and how to prospect the market.

Pittsburgh by the numbers

County Business Patterns (CBP) 2023, NAICS 5412 (accounting, tax preparation, bookkeeping and payroll services), Pittsburgh, PA Metro Area (CBSA 38300):

Lawrence County's employee total was published but flagged as high-noise: confidentiality noise changed it by 5% or more. By our ranking of the CBP metro file, Pittsburgh is 32nd among US metro areas by number of accounting offices. CBP counts establishments with paid employees, not firms, and leaves out the self-employed.

A market weighted toward CPA firms

By size, 473 offices have 1 to 4 employees, 188 have 5 to 9, 72 have 10 to 19, 48 have 20 to 49, 19 have 50 to 99, 4 have 100 to 249 and 6 have 250 to 499. The Census Bureau doesn't publish the 500 to 999 and 1,000-or-more cells; subtracting from the total leaves 2 offices with 500 or more employees. Allegheny County's classes hold all six offices with 250 to 499. Only 58% of offices have fewer than five employees, against 70% to 73% in New York City, Chicago and Houston.

Census doesn't name firms, and SEC EDGAR has no listed accounting companies to add, since its industry list has no accounting code. The largest networks are the Big 4 accounting firms.

Pennsylvania's firm license rules

Pennsylvania's CPA Law, first enacted in 1947, sets out who can practice:

• A firm needs a license. A person other than an individual can't practice public accounting in Pennsylvania unless it holds a firm license from the State Board of Accountancy or qualifies under the law's mobility section for out-of-state firms.
• Apply within 30 days. A new firm must apply for its initial license within 30 days of forming and, under the law as amended in 2025, designate a licensee responsible for the firm's registration.
• Ownership. At least one general partner or owner must be a licensed CPA or public accountant, and other owners must generally hold a license too, with limited room for qualified non-licensee owners.
• Attest work. Audits and other attest work in the state must be under the charge of a licensed CPA or public accountant, and no unlicensed person can take final responsibility for it.

Check a firm or CPA in the Pennsylvania Licensing System, the state's online license search.

How to choose, and check, a Pittsburgh accountant

1. Decide whether you need attest work. Audited or reviewed statements for a lender, funder or buyer need a licensed CPA firm.
2. Look up the firm and the signing CPA in PALS.
3. For tax work, check the credential. The IRS's August 2026 preparer listing, released under the Freedom of Information Act, has 5,017 preparers with a metro business address: 1,728 CPAs, 510 enrolled agents and 360 attorneys. 2,262 (45%) have no IRS credential and no Annual Filing Season Program record. The city of Pittsburgh lists 2,312 preparers, 872 of them CPAs. Only CPAs, enrolled agents and attorneys have unlimited IRS representation rights.
4. Avoid refund-based fees and never sign a blank return, as the IRS advises.
5. Public company audits need a PCAOB-registered firm; at the end of 2025, 646 US firms were registered.

Jobs and pay

Bureau of Labor Statistics, May 2025, Pittsburgh metro:

CBP puts pay per employee at the metro's CPA offices at $85,635, our calculation from payroll.

Selling to Pittsburgh accounting firms

Illustrative example. The company and rates are invented; the counts come from CBP and the IRS listing.

Three Rivers Practice Partners (threeriverspp.example) buys and merges small CPA practices whose founders want to retire. Its target is CPA firms with 5 to 19 employees: the metro has 188 + 72 = 260 offices of that size, and at the CPA share of 48%, an illustrative 125 are CPA firms. The IRS listing helps rank them: 48 business names in the metro list five or more CPAs. Three Rivers writes a personal letter to each founding partner in June, when the season is over, and expects a long cycle: at an illustrative 4% response, 5 first meetings a year.

Dear [first name],

[Firm] has served [town] clients for [number] years, and I imagine you've thought about what happens to the practice, and your staff, when you step back.

We're a Pittsburgh group that joins with local firms on the founder's timetable: clients keep the same people, the name can stay, and the partners decide the pace.

If it would help to compare notes, I'd be glad to meet for coffee in [neighborhood] this summer. There's no agenda beyond that.

Sincerely,
[Your name]

Researching each firm's partners and history is the slow part; Bebop finds matching firms and writes a playbook for each. The list of accounting firms covers who decides at a firm, and how many accountants there are explains the IRS file.

Local sources

Next step: see how a similar-sized midwestern market compares in accounting firms in Grand Rapids.