How to Value a Private Investigation Firm in 2026

Private investigation firms are one of the more misunderstood businesses I run into. Owners assume their book of business is worth more than it is because they confuse personal reputation with transferable enterprise value. Buyers assume every PI firm is a one-person shop chasing cheating spouses. Both are wrong, and the gap between those assumptions is where deals get made.

A well-run PI firm with corporate clients and a licensed bench of investigators is a real business that trades at real multiples. A solo PI with a Rolodex of divorce attorneys is worth almost nothing once the owner walks away. Understanding which one you have is the first step to a realistic valuation.

The Two PI Firms That Sell

When I look at a private investigation business, the first question I ask is: who is the client base? Because there are really two different businesses hiding under the same NAICS code.

Consumer-facing PI firms — the ones doing domestic surveillance, infidelity cases, missing persons, and background checks for individuals — are project-based, emotionally driven, and almost entirely dependent on the owner's marketing and reputation. They trade at 1.0-1.8x SDE, and most of them don't sell at all. The work doesn't transfer.

Corporate and legal PI firms — doing insurance fraud surveillance, workers' comp investigations, skip tracing for collection agencies, corporate due diligence, and litigation support for law firms — are an entirely different animal. These firms have recurring vendor relationships, master service agreements, and predictable caseloads. They trade at 2.0-3.0x SDE, and the best of them get strategic interest from larger investigation platforms.

The difference matters. A $1.2M revenue PI firm with $280K SDE doing consumer work might sell for $350-450K to another licensed investigator who wants a book of cases. The same revenue and SDE doing insurance defense work for three regional carriers sells for $650-800K, and the buyer pool includes both competing PI firms and insurance-services consolidators.

Why Corporate Accounts Are Worth 2x Consumer Work

When an insurance carrier or a law firm sends you a case, they're not hiring you personally. They're assigning work to a vendor in their approved panel. Those panels are sticky. Once you're in, you stay in — as long as you hit turnaround times, keep your licensing current, and maintain your E&O insurance. That stickiness is exactly what a buyer is paying for.

I've seen PI firms with 60-70% of revenue coming from three or four insurance carriers trade at the top of the range because the buyer can underwrite those relationships. The carrier doesn't care who owns the firm; they care that the work gets done and the reports are defensible in court. That's transferable value, and it's why SDE-based valuation actually understates what these firms are worth in a strategic sale.

The flip side is customer concentration risk. If 80% of your revenue comes from one carrier, a buyer will discount heavily because losing that account wipes out the business. The sweet spot is 3-6 corporate clients where no single account is more than 30% of revenue.

Licensing Is the Hidden Value Driver

Private investigation is regulated at the state level, and the rules vary wildly. California, Texas, Florida, and New York all require individual licenses with experience requirements that can take 3-6 years to accumulate. A buyer who doesn't already hold a license in your state faces a real problem: they can acquire the business, but they can't legally run it without a qualified manager on staff.

This creates two dynamics that affect valuation. First, firms with multiple licensed investigators on payroll are worth more because the licensing transfers with the employees. Second, sellers who are willing to stay on as the licensed qualifying agent for 12-24 months post-close command a premium, because they're essentially renting their license to the buyer while a replacement gets trained up.

If you're a solo licensed PI with no other licensed staff, your exit options narrow dramatically. The only realistic buyers are other licensed PIs in your state, and the multiple compresses toward the bottom of the range.

What Buyers Actually Look At

I've walked buyers through a lot of PI firm diligence, and the checklist is remarkably consistent.

• Case management system: Firms still running on spreadsheets and email get marked down. A proper case management platform — even something basic like CROSStrax or PInow — signals operational maturity and makes the business transferable.
• Average case value and turnaround time: Buyers want to see consistent throughput. A firm averaging $1,200 per case with 10-day turnaround is easier to underwrite than one with a wild mix of $300 background checks and $15,000 surveillance jobs.
• Subcontractor vs employee mix: Using 1099 field investigators is normal in this industry, but buyers get nervous when the entire field operation is contractors. It creates worker classification risk and makes the business harder to scale.
• E&O insurance history: Claims history matters. A single bad claim can make a firm uninsurable, which means unsellable.

The Consolidators Nobody Talks About

There isn't a dominant national PI roll-up the way there is in dental or HVAC, but there are quiet acquirers. Command Investigations, Delta Group, and Frasco have all been active buying regional insurance-defense PI firms. Sedgwick and other insurance-services giants occasionally pick up specialty firms to bring capabilities in-house. Private equity has been circling the space for years without anyone running a clean platform play.

What this means practically: if your firm does insurance defense work and generates $500K+ in SDE, you should be running a competitive process rather than taking the first offer from a local competitor. The strategic buyers exist, but they won't find you unless you go find them.

What Destroys PI Firm Value

Owner is the only rainmaker. If every corporate account came from your personal relationships and nobody else in the firm talks to the clients, the business walks out the door with you. Start transitioning client relationships to a senior investigator or operations manager at least 18 months before you sell.

No documented procedures. PI work has a lot of tribal knowledge — how to handle a specific carrier's report format, which courts require in-person filing, how to run a proper mobile surveillance. If none of that is written down, the buyer is inheriting a black box.

Sketchy case files. Buyers will read case files during diligence. If your reports are thin, your chain of custody is loose, or you have cases that could create liability, they'll find them. Clean up the file room before you go to market.

Lapsed licensing or insurance. Any gap in your state license, E&O coverage, or workers' comp is a deal-killer. Due diligence will surface it, and buyers walk away from regulatory risk.

Maximizing Your Exit Value

If you're 2-3 years from selling a PI firm, the playbook is straightforward. Shift as much revenue as possible from consumer work to corporate and legal accounts. Bring on at least one additional licensed investigator so the business isn't license-dependent on you personally. Document your SOPs, standardize your report templates, and migrate to a real case management system. Get your books reviewed by a CPA — not just tax returns, actual sale-ready financials.

Done right, these changes can take a firm from the 1.5x SDE "just another PI shop" bucket into the 2.5-3.0x SDE "real business with transferable value" bucket. On a $300K SDE firm, that's the difference between a $450K exit and a $900K exit — for the same underlying cash flow.

The Bottom Line

Private investigation is a services business that lives or dies on transferable relationships and regulatory compliance. The firms that sell well are the ones where the owner has systematically removed themselves from the critical path — licensed staff, documented processes, diversified corporate accounts, and a case management system a buyer can actually use on day one. Everything else is a lifestyle business, and lifestyle businesses don't command institutional multiples.