Investigation and Background Checking NAICS 561611

        Investigation and Background Checking

Unlock access to the full platform with more than 900 industry reports and local economic insights.

Get Free Trial

Get access to this Industry Profile including 18+ chapters and more than 50 pages of industry research.

Purchase Report

Industry Summary

The 3,800 investigative services firms gather, analyze, and report information to uncover facts, resolve disputes, and/or support decision-making. Day-to-day investigative activities vary but include conducting interviews; searching online, public, and court records; conducting surveillance; writing reports that summarize findings; and sharing the results with clients. Firms may specialize in a particular type of work, such as background checks, occupational fraud, or workplace theft.

Competition from Alternative Sources

Private investigative services companies compete with alternative sources, including general security firms, consulting companies, and in-house resources.

Legal Limitations

Because private investigators are not police officers, their authority is limited.


Recent Developments

Apr 9, 2026 - Specialization in the PI Segment Fast Becoming a Differentiator
  • The private investigation industry is undergoing a significant structural shift toward specialization. According to WifiTalents, roughly 60% of PIs now focus on a niche, with broad generalists giving way to experts in cyberfraud, digital forensics, cryptocurrency tracing, corporate espionage, and insurance fraud - the last of which accounts for 30% of mid-to-large agency workloads. WifiTalents also reports that corporate work now represents nearly 35% of total market share, and electronic discovery is the fastest-growing financial segment in the industry. Clients are increasingly willing to pay premium rates for targeted expertise, particularly in forensic accounting, cyber threat analysis, and asset tracing, according to Fact.MR. Larger firms are responding through M&A, acquiring boutique specialists rather than building capabilities in-house, a trend noted by Data Insights Market. Specialization has become one of the primary factors driving hiring and contracting decisions, with certifications and niche training now essential to compete in the industry.
  • Wages in investigation, guard, and armored car services have risen sharply as employers compete for skilled workers amid growing demand for private security and investigative expertise. According to the US Bureau of Labor Statistics, average hourly pay for nonsupervisory employees in the industry reached $24.26 per hour in November 2025, a 6% increase from a year earlier and 79% higher than a decade ago. The investigation segment has been particularly affected by rising corporate needs for fraud detection, background checks, cybersecurity analysis, and compliance reviews, driven by increasing data breaches and regulatory pressures. Many employers are also contending with shortages of qualified investigators, especially those with law enforcement, legal, or technical backgrounds, which has intensified competition and pushed wages higher. Inflation and broader wage pressures have added momentum, but demand-side factors remain the main driver.
  • US Senators Chris Murphy and Richard Blumenthal of Connecticut are leading the Background Check Expansion Act, federal legislation to require background checks on all gun sales, including those by private sellers and online transactions, closing loopholes in existing law. The bill was reintroduced with support from dozens of Democratic senators and has a companion measure in the House. It would extend the current system - which now only mandates checks for sales by licensed dealers - to cover nearly all firearm transfers, with limited exceptions. Proponents argue this “universal background check” approach is strongly supported by most Americans and would reduce gun violence by keeping firearms from prohibited purchasers. The effort builds on previous Murphy-led campaigns and broader gun safety advocacy in Congress, though it still faces political hurdles in a divided legislature.
  • Technology is reshaping the private investigation industry, making modern PIs more efficient and credible. AI and machine learning now power complex data analysis, from fraud detection to facial recognition, while open-source intelligence tools help investigators legally gather and verify vast amounts of online information. Surveillance has gone high-tech as drones provide discreet, high-quality footage from hard-to-reach places. Professional credibility is also getting a boost through smart digital badges featuring QR codes, NFC chips, and anti-counterfeit designs. With more than 70% of evidence now digital, demand for digital forensics continues to surge, enabling recovery of deleted messages, hidden files, and cybercrime trails. Real-time GPS trackers, cloud-based case management systems, and stronger cybersecurity protocols further streamline operations and protect sensitive data.

Industry Revenue

Investigation and Background Checking


Industry Structure

Industry size & Structure

The average investigative services provider operates out of a single location, employs between 10 and 15 workers, and generates $1-2 million annually.

    • The investigative services industry consists of about 3,800 firms that employ over 45,000 workers and generate over $6 billion annually.
    • The industry is concentrated at the top and fragmented at the bottom; the top 50 companies account for about 60% of industry revenue.
    • Franchises account for less than 2% of the industry.
    • Large firms include Securitas USA, Advantage Investigations, and Digistream.

                                  Industry Forecast

                                  Industry Forecast
                                  Investigation and Background Checking Industry Growth
                                  Source: Vertical IQ and Inforum

                                  Vertical IQ Industry Report

                                  For anyone actively digging deeper into a specific industry.

                                  50+ pages of timely industry insights

                                  18+ chapters

                                  PDF delivered to your inbox

                                  Privacy Preference Center