Private Equity and Law Firms: The Law Firm MSO Playbook

Private Equity and Law Firms

The Law Firm MSO Playbook

Series Introduction

Private equity cannot buy a law firm the way it buys an ordinary operating company. Because nonlawyer investors generally cannot acquire the professional practice directly, a law-firm management services organization transaction succeeds only if the parties build a separate, valuable, and durable services business without transferring professional control or an impermissible interest in legal fees.

This series examines the structure from both sides of the transaction: whether the MSO is a genuine investable business; what private equity is actually acquiring; how a law firm can prepare before a buyer appears; how the management fee holds up under professional-responsibility and tax principles; and how the acquisition and rollover may be taxed. References to private equity may also include family offices, independent sponsors, private-credit providers, and other nonlawyer investors where the same considerations apply.

Article 1

Private Equity Is Looking at Law Firms: Can the MSO Model Withstand Scrutiny?

The capital is moving into law firms, but the conventional acquisition playbook stops at the professional entity. Private equity has reshaped portions of the professional-services market. Health care practices, dental groups, accounting firms, and other regulated businesses have increasingly looked to outside investment to fund growth, improve operations, and address succession. Law firms are now entering that conversation, but the same playbook cannot simply be copied: nonlawyer ownership and professional-independence rules change the architecture from the first term sheet.

Picture a successful law firm at an inflection point. It has an established client base and a strong market position, but its next phase of growth demands significant investment in technology, recruiting, marketing, financial systems, and professional management. Senior partners are confronting succession and the value they have spent years creating. The next generation wants continued growth and a meaningful path to ownership.

Then a private equity sponsor calls, and the real structuring work begins.

The sponsor is not proposing to acquire the law firm directly. Instead, it proposes to invest in a management company that would own specified business assets, employ administrative personnel, and provide services to the lawyer-owned firm under a long-term agreement.

The headline question is valuation. The threshold question is structural: Can the parties create a services business that is sufficiently separate from the law practice to be investable, sufficiently integrated to create meaningful value, and sufficiently limited to preserve the law firm’s professional independence?

The premise behind the structure

A law-firm management services organization, commonly called an MSO, is designed to separate the professional practice of law from the business platform that supports it. That separation must also satisfy the jurisdiction’s applicable version of Model Rule 5.4 (or its equivalent), which generally prohibits nonlawyer ownership of, or fee-sharing with, a law firm.

The lawyer-owned law firm continues to enter into client engagements, provide legal advice, exercise professional judgment, supervise lawyers, maintain client files and trust accounts, and remain responsible for its obligations to clients. The MSO provides defined business and administrative services. Depending on the structure, it may employ administrative personnel, own or license technology, manage facilities and vendors, and provide financial, human-resources, marketing, cybersecurity, and other operational support.

The two entities are connected through a management services agreement, or MSA. The MSA defines the services the MSO will provide, how it will be compensated, which powers remain with the law firm, what information the MSO may receive, and how the relationship can change or end.

That structure looks simple on an organization chart, but it is not simple in operation because most law firms were not built as two separate businesses.

The firm’s people, systems, finances, reputation, and client relationships are interconnected. Technology may be a business asset, but it may contain privileged communications, client files, and attorney work product. Marketing may be an administrative function, but advertising and intake can implicate conflicts, confidentiality, professional rules, and formation of the attorney-client relationship. Billing requires administrative processing, but rates, write-offs, fee disputes, and the treatment of client funds may require lawyer judgment. These overlaps are where otherwise attractive structures begin to fail.

Creating two entities does not resolve those overlaps. The parties must map what each entity will actually own, employ, operate, control, risk, and receive, and test that allocation against how the firm works in practice.

A viable MSO must conduct a genuine services business. A credible MSO typically employs an experienced management team, owns or licenses technology, maintains administrative systems, negotiates vendor relationships, operates facilities, and deploys capital to improve the platform. The parties must be able to explain what the MSO does, which expenses it bears, which assets it uses, which risks it assumes, and why the law firm purchases those services.

If the MSO owns little, employs few people, and performs limited functions, the investor may be purchasing only the expectation of payments under a long-term contract with the law firm. That is materially different from acquiring an operating company with transferable assets, operating expertise, and multiple sources of enterprise value. It is also where a headline valuation can outrun the business actually being acquired.

The MSA therefore carries considerable weight. It is often the MSO’s principal revenue-producing asset, and the structure’s primary vulnerability. Private equity needs enough contractual durability to support its investment. The law firm needs sufficient flexibility to protect clients, respond to professional obligations, and address inadequate services or regulatory change.

An agreement designed to make the MSO’s revenue virtually irrevocable may strengthen the investment model while undermining the premise that the law firm remains meaningfully independent. Conversely, an arrangement the law firm can terminate with little friction may not support the value assigned to the MSO.

The right balance cannot be determined by the agreement’s length or stated term. It turns on whether the MSO has operating substance and whether the law firm remains capable of carrying out its professional obligations.

Professional independence is more than ownership

In most jurisdictions, lawyer ownership is essential, but it is only the starting point as some jurisdictions require 100% lawyer ownership of the professional entity, while others permit limited nonlawyer participation under defined conditions. Ownership alone does not answer every professional-responsibility question.

Private equity may reasonably expect financial reporting, budget oversight, approval rights over significant MSO capital expenditures, and protection against extraordinary indebtedness. Those rights can be necessary to oversee the services business and protect invested capital.

Yet those same protections can affect the law firm if they extend to professional staffing, client acceptance, billing judgments, technology required for legal work, or the resources available to serve clients. Control can arise through contractual rights, economic pressure, information access, and remedies, even when the investor owns no equity in the professional entity. Ethics opinions and enforcement actions in several jurisdictions have examined whether economic arrangements with nonlawyers create an impermissible sharing of legal fees or interfere with professional judgment, even absent direct equity ownership. See, e.g., N.C. 2001 Formal Ethics Op. 2 (contracting with management company to administer law office) later reaffirmed in N.C. 2003 Formal Ethics Op. 6 (contracting with a PEO); D.C. Bar Ethics Op. 304 (outsourcing HR functions to employee management company); Tex. Prof’l Ethics Op. 706 (2025) (nonlawyer-owned support services company permitted but cannot be compensated based on a percentage of law-firm revenue). This is a common point at which a compliant-looking structure becomes vulnerable in operation.

Financial capacity matters just as much. A law firm may formally possess authority over professional matters but lack the personnel, working capital, technology, or systems needed to exercise it. If it cannot hire necessary lawyers, fund client matters, maintain professional insurance, or access essential technology without investor approval, its independence is more formal than real.

The structure must therefore be assessed from the standpoint of what the professional entity can actually do, especially when its judgment conflicts with the investor’s financial objectives.

The structure after closing

A law-firm MSO cannot be designed only for the parties and economic conditions existing at closing. The relationship must operate through revenue declines, lawyer departures, client losses, management disagreements, technology failures, financing issues, regulatory developments, and eventual changes in MSO ownership.

The investor must understand how the platform performs if significant lawyers leave or the law firm’s revenue declines. The law firm must understand whether it can continue serving clients if the MSO experiences financial distress, fails to provide essential services, or is acquired by an owner the lawyers regard as unsuitable.

The arrangement becomes more complicated as the platform grows. New offices, additional firms, new jurisdictions, and expanded technology can alter the service model and professional-responsibility analysis. A fee and governance structure appropriate for the initial firm can become misaligned after several acquisitions.

This creates a recurring tension. The more thoroughly the MSO owns and controls the infrastructure supporting the law firm, the more durable the services relationship may appear. That same dependence can create difficulty if the law firm cannot replace inadequate services or obtain the systems and information needed to satisfy its professional duties. The parties should not make the relationship fragile. They also cannot make the professional practice incapable of functioning without the MSO’s continued acquiescence.

Why firms are considering the model

These challenges do not eliminate the opportunity. A properly designed MSO can create meaningful value for both the operating platform and the law firm.

Outside investment can fund technology, administrative personnel, facilities, marketing infrastructure, and geographic or practice-area growth. The MSO can develop financial and operational capabilities that partners would struggle to build while managing a law practice. Existing owners may obtain partial liquidity, and the structure can support a broader succession strategy.

The planning process also benefits a firm that never accepts private equity. Developing an MSO forces the firm to determine who owns its assets, who employs its personnel, who enters into its contracts, how information moves through its systems, and what it costs to provide administrative support. It imposes greater discipline on financial reporting, business decision-making, and the boundary between professional authority and administration.

Those benefits do not make an MSO appropriate for every law firm. Some firms lack a sufficiently distinct administrative platform. Others depend too heavily on individual lawyer relationships or practices that do not lend themselves to a scalable service model. Still others may conclude that the capital and operating benefits do not justify the complexity, loss of flexibility, or changes to partner economics.

The decision should begin with the firm’s objectives and operating reality, not with a structure presented by a buyer.

Forming an MSO is easy. Building a defensible services enterprise is not. The harder task is building a services enterprise with identifiable assets, personnel, capital, business risks, and contractual rights while leaving the professional entity capable of satisfying its obligations to clients. That is where deals often go wrong because the documents describe separation, but the operating model leaves one entity dependent on the other for value or professional capacity.  As a result, this requires evidence of operating substance at the MSO, substantive professional and financial independence at the law firm, and a relationship capable of surviving circumstances neither side expects when the deal closes.

If those elements cannot be reconciled, neither a higher valuation nor a more detailed MSA will resolve the underlying conflict. If they can, the MSO can provide a structure through which a law firm obtains capital, modernizes its operations, and addresses growth or succession without transferring the professional practice itself.

Next in the series

Next: “What Private Equity Actually Owns – And What it Cannot.” An ascribed value means little until the parties identify which systems, people, contracts, goodwill, and payment rights can actually move to the MSO, and which cannot. This answer should define the deal before any price is set.

Contact Messerli Kramer

An MSO transaction can fail before closing if the services business is not truly separable, the management fee cannot be supported, or the law firm has surrendered more practical independence than the documents acknowledge. Messerli Kramer helps firms and investors test those fault lines before a valuation, LOI, or MSA hardens the wrong assumptions. A focused review before the parties underwrite value, negotiate exclusivity, or lock in the MSA is the prudent way to identify structural problems while they can still be solved.

Contact Michael Britten to discuss.

This article is intended for general informational purposes and does not constitute legal or tax advice. Applicable ownership, fee-sharing, professional-responsibility, and tax requirements vary by jurisdiction and depend on the specific facts and structure. Reading this article does not create an attorney-client relationship.