In private equity, deals move fast – but value is created by what happens before, during and after the transaction.
Due diligence in acquisitions and mergers is core to this process. Done well, it protects value, accelerates confidence and sets the foundations for scalable growth. Done poorly, it creates risks that linger long after completion.
For PE‑backed businesses, due diligence isn’t a one‑off exercise. It’s a repeatable discipline that supports buy‑and‑build strategies, underpins exit value and ensures management teams stay in control under intense investor scrutiny.
This guide breaks down what due diligence really involves, what investors look for, common red flags, and how Cooper Parry supports PE‑backed businesses through the entire investment lifecycle.
What is due diligence?
Due diligence is the process of validating a business before an investment, acquisition or divestment. But in a private equity environment especially, it goes far deeper than confirming the headline numbers.
Due diligence in M&A is about understanding:
- The value of the business today – sustainability of earnings, market opportunity and competitive proposition of the business
- Where risk sits – operationally, financially, technologically and structurally
- How the target fits into a wider value creation plan
For PE‑backed businesses, due diligence happens repeatedly:
- On entry
- On each bolt‑on acquisition
- During refinancing or restructuring
- In preparation for exit
That’s why building strong internal processes and using experienced advisers who understand the PE investment lifecycle is critical from day one.
What Due Diligence in M&A Really Focuses On
While scope varies by deal, most acquisitions follow a similar due diligence process, designed to answer one fundamental question: what is the business actually worth once risks are stripped out?
Key areas of focus typically include:
Quality and sustainability of earnings
Investors want to understand maintainable EBITDA, not statutory profit. This includes:
- Normalising one‑off income and costs, and known changes to the business
- Assessing recurring revenue
- Understanding margin stability
Working capital and cash conversion
Cash matters. A strong P&L with weak cash generation is a red flag. Due diligence will assess:
- Working capital requirements and seasonality
- Cash flow volatility
- Capex and other ongoing cash requirements
Operational and integration risk
Particularly in buy‑and‑build strategies, investors examine:
- Operational complexity
- Dependency on key individuals
- Ability to integrate systems, people and processes
Technology and data
Modern diligence increasingly includes:
- Systems resilience and scalability
- Data quality and reporting integrity
- Cyber and technology risks
Tax and legal risks
Identifying any potential issues with regards to the historical tax and legal position of the business, including:
- Potential exposure from historical tax positions taken
- Ongoing litigation or historical non-compliance
Together, this creates a picture that informs valuation, deal structure and post‑deal priorities.
Investor Due Diligence: What Do Investors Look For?
Understanding investor due diligence is key for management teams preparing for scrutiny.
Private equity investors typically look for:
- A credible earnings base with clear visibility and evidenced growth potential
- Robust financial reporting they can trust
- Risks they understand – and can price
- A platform capable of supporting growth and bolt‑ons
Investors aren’t risk‑averse – but they hate surprises. The role of due diligence is to surface issues early, quantify impact and build confidence in the next phase of growth for the business.
Common Due Diligence Red Flags
Some issues appear again and again across deals, and a strong diligence process will highlight and explain these red flags.
Common red flag report due diligence themes include:
- Over‑reliance on key customers or individuals
- Poor cash conversion relative to profits
- Earnings inflated by non‑recurring items
- Cash liabilities potentially arising post-deal
- Weak financial controls or inconsistent reporting
- Technology platforms that don’t scale with growth
Effective due diligence focusses investor attention on the issues that matter most, even in complex transactions. Addressing these early can significantly improve confidence in valuation and deal execution.
Preparing for Due Diligence: A Finance Function Checklist for PE‑Backed Businesses
The best due diligence outcomes are achieved when management teams are prepared.
When preparing for financial due diligence in particular, PE‑backed businesses should ensure:
- Clear, timely and consistent management accounts
- Well‑documented accounting policies and practices
- Visibility on revenue sustainability, margins and industry-standard KPIs
- Robust working capital and cash flow analyses
- A clear bridge between statutory accounts and underlying EBITDA
Just as importantly, teams need the capacity to keep running the business while responding to diligence requests.
Many PE‑backed businesses later spin the above into a structured M&A due diligence checklist – tailored separately for buying and selling – to support repeatable deal execution.
The Role of External Advisors in Due Diligence
In a PE environment, due diligence is rarely handled in isolation. It requires joined‑up expertise across multiple disciplines.
At Cooper Parry, we’re a fast-growing, PE-backed business ourselves. So, we’ve shaped our services to deliver holistic support and help you create value with:
- Corporate Finance shaping buy-side strategy: identifying targets, evaluating valuations, advising on negotiation tactics and managing the full M&A process.
- Transaction Services delivering robust financial due diligence, focused on maintainable EBITDA, working capital, cash conversion and key risks.
- Tax specialists structure the deal effectively from day one, preventing any “day two surprises”.
- Debt Advisory maps the lending landscape and supports efficient acquisition financing.
- Digital specialists carry out technology due diligence, assessing data, systems, cyber resilience and early synergy potential.
- Audit teams providing assurance relating to the financial statements to investors and other stakeholders.
- Legal specialists working alongside investors to guide them through the deal, providing support that balances commercial objectives with appropriate protection
The power comes from coordination, and each insight feeds into the broader investment thesis.
Beyond the Deal: Setting Up for Long‑Term Value Creation
Due diligence should never end at completion. For PE‑backed businesses, early diligence findings often shape:
- The 100‑day plan
- Integration roadmaps
- Reporting enhancements
- Future bolt‑on strategies
- Value creation strategy
Businesses that treat diligence as a value creation tool, not just a transaction hurdle, are better placed to scale predictably and maintain momentum across multiple acquisitions.
This is where repeatable processes, consistent metrics and aligned advisers make a measurable difference.
How Cooper Parry Supports PE‑Backed Businesses
Due diligence is just one aspect of a fast‑paced private equity lifecycle – but it influences every step that follows.
Cooper Parry supports PE houses, portfolio companies and leadership teams through every stage of that journey, from acquisition to exit, with joined‑up expertise that creates and protects value.
Acquisition
- Buy‑side M&A strategy and execution
- Financial, tax and legal due diligence
- Tax and deal structuring
- Technology diligence and risk assessment
- Acquisition financing
- Audit transitions, interim finance support and KPI dashboards
- Post-deal Digital support with enterprise system integration, digital transformation and ongoing cyber risk management
Planning for Growth
- Strengthening finance functions and reporting
- Preparing for further bolt‑ons
- Refining capital structures
- Designing scalable systems and processes
Value Creation
- Supporting repeat acquisitions through consistent diligence
- Integrating bolt‑ons efficiently
- Optimising tax and funding as the group evolves
- Enhancing technology, data and insight
Exit Readiness
- Vendor due diligence and sell‑side advisory
- Tax‑efficient exit structuring
- Demonstrating credible, sustainable performance
- Advising management teams on their equity incentive arrangements.
From and Law– we’re one team with a huge range of powerful, interconnected offerings. Get in touch to find out how we can support you through the entire PE investment lifecycle today.
