Mergers and acquisitions usually look like wins. The press release goes out, the wire hits the bank, and everyone toasts the deal. The litigation, when it comes, almost always shows up later. By then, the parties are deep into integration, the purchase price is already spent, and the leverage has shifted.
For owners of professional services firms, the danger is not the headline antitrust case. It is the quieter cluster of issues buried inside the deal documents, the diligence file, and the post-closing integration plan. According to the BRG M&A Disputes Report 2025, nearly half of dealmakers expect even more disputes this year as deal volume climbs and regulators recalibrate. A separate Harvard Law School Forum on Corporate Governance analysis shows that litigation risk is now baked into how acquirers value targets in the first place.
This article walks through the litigation traps that most often surface in mergers and acquisitions of professional services firms, and how Florida sellers and buyers can spot them before they turn into a lawsuit.
Why Professional Services Deals Carry Extra Litigation Risk
Professional services firms (law, accounting, engineering, consulting, medical, architecture, financial advisory) are different from product companies in three ways that drive litigation:
- The value of the business walks out the door at 5 p.m. each day.
- Client relationships are personal, not contractual.
- Licensing, ethics rules, and fiduciary duties layer on top of standard deal law.
Those features make the post-closing integration plan every bit as legally important as the purchase agreement itself. When key producers leave or clients refuse to follow, both sides start hunting for someone to blame, and the deal documents become evidence.
Risk #1: Diligence Gaps That Become Fraud Claims
The single most common source of post-closing litigation is the buyer who later argues the seller hid something. In Florida, that argument typically takes the form of a fraud or fraud in the inducement claim, a fraudulent misrepresentation claim, or a breach of representations and warranties.
The numbers are sobering. A Norton Rose Fulbright industry survey reports that roughly one in five representations and warranties insurance policies issued from 2016 to 2018 produced a claim within three years. Breach of financial statement representations alone accounts for over a third of total claim dollars paid.
Sellers reduce this risk by:
- Building a clean, complete data room before the buyer ever asks.
- Disclosing problems on a schedule, not in a hallway conversation.
- Pushing for tight definitions of “Material Adverse Effect,” “Knowledge,” and “Ordinary Course.”
Buyers reduce this risk by running rigorous transactional due diligence and documenting what was reviewed and when. Skipping diligence to close fast is the most expensive shortcut in the deal.
Risk #2: Earnouts That Read Like a Lawsuit Waiting to Happen
Earnouts solve a valuation problem by deferring part of the price until the business hits future targets. They also produce some of the most predictable litigation in M&A. According to Freshfields’ analysis of recent earnout litigation trends, the number of U.S. lawsuits involving earnouts nearly doubled between early 2022 and early 2023.
The classic dispute looks like this. The seller stays on. The buyer makes operating decisions that the seller believes were designed to depress the earnout. The seller sues for breach of contract and for breach of the implied covenant of good faith and fair dealing.
A Sidley Austin review of recent decisions confirms that courts will not rewrite a clear contract under the guise of good faith. If the agreement gives the buyer broad operating discretion, sellers usually lose.
To keep an earnout from becoming a complaint, the parties should:
- Pick measurable targets (revenue or EBITDA computed by a defined formula) rather than vague “best efforts” goals.
- Spell out the buyer’s operating obligations during the earnout period.
- Define the accounting methodology in writing, including any GAAP exceptions.
- Include a fast, neutral dispute resolution mechanism for calculation disagreements.
Risk #3: Successor Liability in Asset Deals
Buyers often choose an asset purchase precisely to avoid the seller’s liabilities. Florida law generally honors that choice, but with four important exceptions. Under longstanding Florida doctrine, a successor entity can be saddled with the predecessor’s debts when (1) the successor expressly or impliedly assumes them, (2) the transaction is a de facto merger, (3) the successor is a mere continuation of the predecessor, or (4) the deal is a fraudulent attempt to dodge creditors. The Florida Bar’s analysis of successor liability in employment cases is a good primer on how courts apply these exceptions.
Professional services deals are especially prone to “mere continuation” findings because the new entity often keeps the same name, same office, same staff, and same clients. To preserve the asset-deal bargain, the parties should clearly identify excluded liabilities, structure consideration so it is not a pure exchange of equity for assets, and avoid the kind of overlap that signals a fraudulent transfer to creditors.
If the seller’s old liabilities later threaten the buyer’s solvency, bankruptcy and restructuring counsel may be the only way out, and that is a very expensive seat to land in.
Risk #4: Non-Competes, Non-Solicits, and Trade Secrets
In a professional services deal, the people are the asset. If the rainmakers walk and take clients with them, the buyer paid for goodwill it cannot keep.
Florida is one of the most protective states in the country for restrictive covenants. Section 542.335 of the Florida Statutes (read it here) makes non-competes enforceable when they are reasonable in time, area, and line of business and supported by a “legitimate business interest.” For sale-of-business covenants, restraints up to seven years are presumed reasonable. The 2025 Florida CHOICE Act layered an even more employer-friendly regime on top for higher-earning employees.
Two practical points get litigated again and again:
- Assignment. A non-compete assigned from seller to buyer must be expressly assignable. If the contract is silent, courts may refuse to enforce it. Counsel should review every key person’s agreement before signing the LOI.
- Trade secrets. When a former producer leaves with the client list and pricing data, the case usually pairs an unfair competition and restrictive covenants claim with a misappropriation of trade secrets claim. A buyer who has not built a real trade secret protection program before closing will struggle to win that fight.
Risk #5: Dissenting Shareholders and Appraisal Rights
For Florida corporations, Section 607.1302 of the Florida Business Corporation Act gives certain shareholders the right to demand the “fair value” of their shares when the corporation merges, converts, or sells substantially all of its assets. The deal closes anyway, but the dissenting shareholder gets to fight in court over what the shares were really worth.
Appraisal cases are quiet, technical, and expensive. They turn on valuation expert testimony, and they can take years. A recent Fasken summary of appraisal jurisprudence shows that courts are increasingly willing to award fair value above or below the deal price when the process was flawed.
Buyers and sellers should:
- Identify every shareholder who could trigger appraisal rights long before the vote.
- Follow the notice and procedure rules in Section 607.1302 to the letter.
- Build the valuation record (third-party fairness opinion, market check, board minutes) as if a court will read it.
For closely held firms, related fights often surface as direct shareholder disputes or derivative litigation, particularly where the appraisal rights process is mishandled.
Risk #6: Regulatory Approvals, Antitrust, and Licensing
Antitrust reviews catch most owners by surprise because professional services firms rarely think of themselves as monopolists. They do not have to.
Federally, the Hart-Scott-Rodino Act requires premerger notification once a deal crosses size thresholds set each year by the Federal Trade Commission. The 2026 thresholds raise the size-of-transaction floor to roughly $133.9 million. Below that floor, federal pre-clearance is usually not required, but the deal can still be challenged after the fact.
In Florida, the Florida Antitrust Act of 1980 prohibits agreements and conduct that restrain trade or attempt monopolization. The Florida Business Corporation Act, specifically Section 607.1101, governs how plans of merger are adopted and approved. The Florida Bar’s commentary on recent amendments explains how those rules have been modernized.
Industry licensing adds another layer. A medical practice acquisition triggers Florida Department of Health rules. An accounting firm sale touches the Florida Board of Accountancy regulations. A law firm combination implicates Florida Bar rules on partnership and fee sharing. Skipping any of these is a recipe for an enforcement action that delays or unwinds the deal.
Risk #7: Cybersecurity and Data Privacy Inheritance
When a buyer acquires a target, the buyer also inherits the target’s data privacy obligations and cyber exposure. Plaintiffs and regulators have figured this out. A data breach that occurred under the seller’s watch can become the buyer’s class action after closing.
Diligence should include a real cybersecurity assessment, not just a checked box. Reps and warranties should cover prior incidents, system controls, and regulatory inquiries. The integration plan should treat data systems as a regulated environment, not a back-office task.
Risk #8: Fights That Land Before the Deal Even Closes
Not every M&A lawsuit happens after closing. Some happen in the middle of the deal:
- A target’s minority owner sues the board for breach of fiduciary duty.
- A bidder accuses the target of breaching exclusivity.
- A buyer sues to specifically enforce closing or to invoke a Material Adverse Effect.
- A third party claims tortious interference over a stolen deal.
These cases are urgent, expensive, and usually require a trial team that can move at the same speed as the transactional team. That is why most experienced firms keep business litigation and corporate governance counsel on the same line.
How to De-Risk Before You Sign the LOI
A handful of disciplines will eliminate most of the litigation risk hidden in a typical professional services M&A transaction:
Start governance early
Tighten member, shareholder, and partner agreements before the deal, not during it.
Run real diligence
Use a structured due diligence workflow with a written checklist.
Map the deal structure
Know whether you are doing a stock deal, asset deal, statutory merger, or share exchange, and understand the litigation profile of each.
Lock in the people
Update non-competes, non-solicits, and confidentiality agreements before the buyer ever sees the data room.
Plan integration on Day 1
The first 90 days after closing produce most of the post-closing claims. A real plan, not a slide.
Hire counsel who has lived through the disputes
Working with attorneys who advise entrepreneurs buying and selling businesses and who have actually litigated these issues is the surest way to avoid them.
How Jimerson Birr Helps
Jimerson Birr advises owners, executives, and investors throughout Florida on the full life cycle of a professional services transaction, from term sheet through integration, through any post-closing dispute that arises. Our combined transactional and litigation bench handles common transactional requirements for corporate mergers and acquisitions for clients across the professional services industry, including law firms, accounting firms, engineering firms, healthcare practices, and consulting groups.
If you are evaluating a deal, negotiating one, or already on the wrong end of one, contact our office to schedule a consultation. Catching a problem before signing is almost always cheaper than litigating it after closing.