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Investigation Services in the UK - Market Size, Industry Analysis, Trends and Forecasts (2025-2029)

Heydon Thomas Heydon Thomas London, United Kingdom Last Updated: June 2025 SIC UK-N803

Revenue

£1.2bn

2025-26

£1.2bn

Past 5-Year Growth

Profit

£XXX.Xm

Employees

25,348

Businesses

7,767

Wages

£XXX.Xm

Investigation Services in the UK industry analysis

The private investigations industry covers both investigations for individuals and corporate clients, which make up the bulk of revenue. A weakening trend in M&A activity has led to a slump in demand for corporate investigations in Europe. Companies usually hire corporate investigators to conduct due diligence prior to a potential merger or acquisition. However, from 2019 to 2023, M&A activity in Europe slumped, which is attributed to high interest rates in the UK and Eurozone, making it difficult for companies to fund high-value deals. According to data from Kroll, 2023 saw European target M&A plummet to a ten-year low, restricting opportunities for investigation firms in corporate intelligence, fraud risk assessment and asset tracing. Overall, investigation services revenue is projected to dip at a compound annual rate of 0.3% over the five years through 2025, alongside an expected hike of 1.5% in 2025, reaching €1.2 billion.

Trends and Insights

  • Falling M&A activity dampens the need for European corporate investigations. Shrinking merger and acquisition activity between 2019 and 2023 due to steep interest rates has subdued businesses' demand for due diligence checks before pursuing high-value deals.
  • M&A downturn hits corporate investigation demand. The lull in European merger and acquisition activities, driven by low business confidence and high interest rates, is diminishing the need for corporate investigations.
  • The industry is highly fragmented. There are many PIs that offer services to just the local area. Corporate investigation is a more concentrated, with legal firms offering investigation services across multiple countries.
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Top Questions Answered in this Report

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What is the market size of the Investigation Services industry in the United Kingdom in 2025?

The market size of the Investigation Services industry in the United Kingdom is £1.2bn in 2025.

How many businesses are there in the Investigation Services industry in the United Kingdom in 2025?

There are 7,767 businesses in the Investigation Services industry in the United Kingdom, which has grown at a CAGR of 3.3 % between 2020 and 2025.

Has the Investigation Services industry in the United Kingdom grown or declined over the past 5 years?

The market size of the Investigation Services industry in the United Kingdom has been growing at a CAGR of 0.9 % between 2020 and 2025.

What is the forecast growth of the Investigation Services industry in the United Kingdom over the next 5 years?

Over the next five years, the Investigation Services industry in the United Kingdom is expected to grow.

What does the Investigation Services industry in the United Kingdom include?

Corporate investigations and Private investigations are part of the Investigation Services industry in the United Kingdom.

How competitive is the Investigation Services industry in the United Kingdom?

The level of competition is high and steady in the Investigation Services industry in the United Kingdom.

Everything you need in one report

  • Reliable market estimates from 2015-2030
  • Competitive analysis, industry segmentation, financial benchmarks
  • Powerful SWOT, Porter’s Five Forces and risk management frameworks
  • Online membership platform with PDF, Word, Excel and PPT exports

Table of Contents

External Environment

Highlights

Trends
  • Regulation & Policy
  • Assistance

Key Takeaways

Some countries require private investigators to obtain licenses. A few countries in Europe require private investigators to obtain licenses to operate, which may involve fees, training and qualification requirements.

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External Drivers

Analysis

What demographic and macroeconomic factors impact the Investigation Services in the UK industry?

Financial Benchmarks

Highlights

Trends
  • Profit Margin
  • Average Wage
  • Largest Cost

Key Takeaways

Investigation providers rake in profit. This is due to their ability to charge premium prices for specialist services in a competitive market, while maintaining low costs.

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Cost Structure

Charts
  • Share of Economy vs. Investment Matrix
  • Industry Cost Structure Benchmarks:
    • Marketing
    • Depreciation
    • Profit
    • Purchases
    • Wages
    • Rent
    • Utilities
    • Other
Analysis

What trends impact cost in the Investigation Services in the UK industry?


Key Ratios

Data tables
  • IVA/Revenue (2015-2030)
  • Imports/Demand (2015-2030)
  • Exports/Revenue (2015-2030)
  • Revenue per Employee (2015-2030)
  • Wages/Revenue (2015-2030)
  • Employees per Establishment (2015-2030)
  • Average Wage (2015-2030)

Country Benchmarks

European Leaders & Laggards

Data Tables

Top and bottom five countries listed for each:

  • Revenue Growth (2025)
  • Business Growth (2025)
  • Job Growth (2025)

European Country Performance

Data Tables

Rankings available for 37 countries. Statistics ranked include:

  • IVA/Revenue (2025)
  • Imports/Demand (2025)
  • Exports/Revenue (2025)
  • Revenue per Employee (2025)
  • Wages/Revenue (2025)
  • Employees per Establishment (2025)
  • Average Wage (2025)

Structural Comparison

Data Tables

Trends in 37 countries benchmarked against trends in Europe

  • Concentration
  • Competition
  • Barriers to Entry
  • Buyer Power
  • Supplier Power
  • Volatility
  • Capital Intensity
  • Innovation
  • Life Cycle

Key Statistics

Industry Data

Data Tables

Including values and annual change:

  • Revenue (2015-2030)
  • IVA (2015-2030)
  • Establishments (2015-2030)
  • Enterprises (2015-2030)
  • Employment (2015-2030)
  • Exports (2015-2030)
  • Imports (2015-2030)
  • Wages (2015-2030)

Methodology

Where does IBISWorld source its data?

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