The Line Sponsors Cannot Cross: Reading Holland & Knight on PE Sponsor Independence in Professional-Services MSOs

MARKET INSIGHTS · PE SPONSOR INDEPENDENCE

The Line Sponsors Cannot Cross: Reading Holland & Knight on PE Sponsor Independence in Professional-Services MSOs

Holland & Knight has placed the regulatory line on the record. The structural-tax line, set by Section 482, runs alongside it. In a properly built professional-services MSO, both lines have to hold — and neither one alone is sufficient.

By Alex Jones, EA, CFP®, ChFC®, CLU®, CEPA, Founder & CEO, Guardian Tax Consultants® · July 10, 2025 · 8 min read

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Holland & Knight’s legal-services transactions team has been the most active institutional voice in print on what private-equity sponsorship of a professional-services practice can and cannot look like. The firm’s July 10, 2025 insight by Joshua E. Porte, Trisha M. Rich, and Leonard C. Brahin, Restructuring Law Firms Through Management Service Organizations, is worth reading carefully. It frames the institutional independence test that any sponsored Management Services Organization in a licensed-practice setting has to satisfy — and it draws the line between sponsor involvement in the management entity and inappropriate involvement in the licensed-attest, legal-advice, or clinical function. The line exists. The line is fact-specific. And whether the structure has crossed it materially affects both regulatory posture and structural-tax posture.

This note is GTC’s commentary on that work. We treat the H&K framing as the regulatory baseline, accept it as such, and add the overlay that is most often missing from the deal-team conversation: the Internal Revenue Code §482 line that runs in parallel to the regulatory line and is enforced through a different examination posture. The institutional read is that the two lines converge in one place — the substantiation file behind the management fee — and that the dual-discipline question they raise belongs in the sponsor diligence package, not in the post-close clean-up file.

The framing Holland & Knight has placed on the record

The H&K piece is institutionally important because it states the architectural premise of a sponsored professional-services MSO without softening it. At closing, the management entity acquires substantially all of the operating practice’s administrative assets, while certain assets are specifically excluded from the transfer — client records, engagement letters, and the lawyer-employment agreements through which professional services are delivered. The licensed practice continues as its own entity. The sponsor’s economic interest sits in the management entity. The two entities are bound by a long-term management services agreement that defines the scope, the price, and the disclaimers around professional judgment.

The Porte–Rich–Brahin observation worth highlighting is structural rather than rhetorical: properly designed MSO documents must keep the operating practice closely connected with the management entity insofar as permitted under applicable law, while never letting the management entity interfere with the professional judgment or decision-making of the licensed practice. That is the regulatory line. It is the same line drawn by ABA Model Rule 5.4 on professional independence of a lawyer, by the state-board rules on independence in CPA practice, and by the corporate-practice-of-medicine doctrine in clinical settings. The H&K piece names the line in the legal context, but the underlying architecture travels across the licensed professions.

One direct line from the H&K commentary captures the institutional posture: the documents must preserve and safeguard “the independence of the law firm entity and its lawyers.” That phrasing is exactly right. It is also the phrasing that connects to the second line — the one that runs through the tax code.

The regulatory line in the licensure rules

The regulatory line, in the H&K formulation, has two operating components. The first is the fee-structure constraint. Because Rule 5.4 prohibits fee-sharing between attorneys and non-attorneys, the management fee paid from a sponsored law-firm operating entity to its MSO generally cannot be priced as a percentage of revenue. The fee is instead structured as a flat monthly amount, a cost-plus arrangement, or another formulation that is not directly tied to firm revenues or matter outcomes. The second is the professional-judgment carve-out. The MSA must affirmatively disclaim any management-entity authority over the lawyer’s independent professional judgment, the lawyer-client relationship, or the case-level decision-making that licensure rules reserve to the licensed professional.

H&K’s reading of the Texas Committee on Professional Ethics’ Opinion 706 reinforces the same point. Texas confirmed that a lawyer may engage a non-lawyer-owned MSO for support services so long as the fee is not a percentage of revenue, and so long as the lawyer’s independent professional judgment is preserved. The regulatory posture in CPA practice runs along an analogous structure: the licensed-attest function must retain professional independence under the applicable state-board rules, and the management entity’s economic involvement in the licensed practice cannot displace that independence. In the clinical context, the corporate-practice-of-medicine doctrine reaches the same destination from a different direction.

What the H&K piece does well is to treat this regulatory architecture as a discipline rather than a checklist. The line is not crossed by a single deal term; it is crossed by the cumulative economic and operational effect of a structure that begins to control what licensure rules say only the licensed professional can control. Whether the structure has crossed the line is a facts-and-circumstances question, and the documents alone do not settle it.

The §482 line in the structural-tax architecture

The second line runs through the tax code, and it is enforced by a different agency on a different examination calendar. Under §482 and Treasury Regulation §1.482-9, the management fee paid between a related operating practice and its MSO must satisfy the arm’s-length standard. That standard is not satisfied by the labels in the MSA. It is satisfied by a functional analysis of the services rendered, an identification of the assets used and risks borne by each party, a benchmarking exercise against comparable transactions, and a written record of the methodology applied to select among the ordered methods the regulation prescribes — services cost, comparable uncontrolled services price, gross services margin, cost of services plus, comparable profits, or profit split.

The structural-tax point worth surfacing is that the §482 standard interacts with the regulatory standard in a specific way. If the management fee is structured as a percentage of practice revenues to satisfy a sponsor’s economic model, the regulatory line is crossed before §482 has a chance to weigh in. If the fee is structured as flat or cost-plus to satisfy the regulatory constraint, the §482 question becomes whether the chosen amount produces an arm’s-length result — supportable under the regulation’s ordered methods — for the services actually rendered. The institutional risk is that the structure satisfies one line by violating the other, or that it satisfies neither line cleanly and relies on the absence of examination as its working theory of the case.

The same logic explains why §269A — the personal-service-corporation reallocation authority — sits in the background of every sponsored professional-services MSO. The provision empowers the Service to reallocate income and deductions between a personal service corporation and its owner-employees when the principal purpose of the entity is the avoidance of tax. The risk is not theoretical in a sponsored structure that has been over-architected to push professional-fee revenue through a non-licensed management entity. The deduction itself sits in §162 as an ordinary and necessary business expense, and the deduction has to survive each of the three statutory tests in series.

Where the two lines converge — the dual-discipline question

The two lines converge in one place: the contemporaneous substantiation file that documents both the regulatory architecture of the structure and the economic basis for the related-party management fee. The H&K piece is rigorous on the regulatory side of that file. The structural-tax side of the same file requires a discipline that is not native to deal counsel or to sponsor diligence teams — the economic-analysis methodology that Treasury Regulation §1.482-9 contemplates for related-party services. In our reading, the institutional gap in many sponsored professional-services MSO transactions is not the regulatory line; H&K and counsel of similar quality hold that line carefully. The gap is the §482 line, where the file is often built late, built thin, or assumed to have been built by someone else.

The dual-discipline question is therefore practical. Who, in the deal architecture, owns the regulatory substantiation file under licensure rules? Who, in the same architecture, owns the §482 substantiation file under Treasury Regulation §1.482-9? In the structures that survive examination on both sides, the answers are clear at closing. In the structures that do not, the question is asked for the first time during examination — on either side — and the file is built backward. The pattern we observe in the published commentary is that the regulatory file is treated as a closing deliverable and the §482 file is treated as a tax-season afterthought. The institutional read on H&K’s framing is that the two files should travel together.

This is the same observation that the Handler Thayer / Wells Hall memorandum tradition has been making in the closely-held planning context for two decades. It is the same observation that surfaced in the Q4 2025 conversations with Top-100 CPA tax partners on private equity in CPA firms. And it is the observation that the deal teams structuring the next wave of professional-services MSO transactions will benefit from carrying into the term-sheet phase rather than into the post-close governance phase.

The closing observation

H&K’s work on professional-services MSOs has done the institutional job of putting the regulatory architecture in print, naming the line that sponsors cannot cross, and treating the question with the seriousness it deserves. The complementary work, on the structural-tax side, is to make sure the §482 substantiation file is built with the same discipline and on the same calendar — not after the deal closes, not after the return is signed, and not after the examination has begun. The dual-discipline question is the institutional question. A sponsored professional-services MSO is well-built when both lines hold and both files exist. It is exposed when either one is missing. More commentary and technical briefs are available in the Insights library.

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