This article forms part of The Acquisition Success Series, a four-part guide for business owners considering acquisitions, covering strategic fit, pre-Heads testing and deal structuring, formal due diligence, and post-acquisition value realisation.
Once Heads of Terms have been agreed, the buyer usually moves into formal due diligence. By this stage, the headline price, proposed structure, key assumptions and transition principles may already have been discussed, but they should not be treated as final simply because they have been written down.
Formal due diligence should test whether the assumptions behind the Heads of Terms still stand up.
The purpose is not to look for problems for the sake of it. The purpose is to confirm what the buyer is acquiring, identify risks that need to be addressed, and decide whether the agreed price, structure and protections remain appropriate before completion.
Use due diligence to confirm, challenge and refine the deal
Formal due diligence should not become a long list of disconnected findings. It should help the buyer answer a more practical question: does the deal still make sense based on the terms proposed?
The process should focus on the areas that affect value, risk, legal protections, completion readiness and the buyer’s first phase of ownership.
| Due diligence area | What should be confirmed | Possible deal impact |
|---|---|---|
| Financial performance | Historical accounts, management accounts, revenue trends, gross margin, adjusted EBITDA and cash flow. | Confirms whether maintainable earnings support the valuation, or whether price and funding assumptions need to be revisited. |
| Revenue quality | Recurring income, project-based work, seasonality, customer concentration, pricing and churn. | Shows whether income is stable and repeatable, or whether deferred consideration, retention assumptions or protections are needed. |
| Working capital | Debtors, creditors, stock, accrued income, deferred income and normal working capital requirements. | Helps ensure the business is transferred with enough working capital to trade properly after completion. |
| Customers and contracts | Contract terms, renewal history, customer dependency, relationship ownership and change-of-control issues. | Tests whether revenue is properly protected and whether customer risk should affect structure or completion conditions. |
| Pipeline and forecast | Pipeline evidence, conversion rates, capacity, assumptions and sensitivity analysis. | Confirms whether future growth is realistic or whether the upfront price should be reduced or linked to future performance. |
| People and management | Employment terms, salaries, key employees, retention risk, management structure and succession. | Identifies whether the business can operate after the seller steps back and whether retention or transition measures are needed. |
| Systems and reporting | Accounting systems, operational systems, CRM, reporting quality, data controls and cybersecurity. | Shows whether the buyer can monitor and manage the business properly after completion, or whether remediation costs should be considered. |
| Legal, tax and compliance | Leases, finance agreements, supplier contracts, disputes, licences, tax, VAT, PAYE, pensions and regulatory compliance. | Identifies liabilities or obligations that may require warranties, indemnities, price adjustment or resolution before completion. |
| Transition requirements | Seller handover, customer communication, employee communication and operational knowledge transfer. | Confirms what must happen before and after completion to protect value and avoid disruption. |
The most useful due diligence does not simply say whether something is “good” or “bad”. It explains the commercial consequence.
If the findings confirm the assumptions behind the Heads of Terms, the buyer can proceed with greater confidence. If they do not, the buyer may need to revisit price, adjust the structure, seek stronger protections, delay completion or, in some cases, walk away.
The key is to keep the process focused. Formal due diligence should be detailed, but it should not become unfocused. The buyer should keep returning to four questions: does the investment case still hold, does the price still make sense, does the structure still protect the buyer, and what must be addressed before completion?
The deal should improve as diligence progresses
The best due diligence processes do not simply produce a report at the end; they improve the quality of the transaction as the process develops.
They help the buyer understand the business more clearly, refine the valuation, improve the deal structure, identify legal protections, prepare for completion and plan the first phase of ownership.
That does not mean every issue should lead to a price reduction. Some risks can be addressed through structure, warranties, indemnities, transition arrangements, completion conditions or post-completion planning. However, material findings should not be ignored simply because the buyer wants to maintain momentum.
At Randall & Payne, we help business owners and management teams use formal due diligence to test the deal, not just review the information. This includes reviewing financial performance, maintainable earnings, working capital, valuation assumptions, risk areas, deal structure and the key issues that should be addressed before completion.
If you are acquiring a business, formal due diligence should give you more than information. It should give you confidence that the deal still makes sense, that the terms reflect the risk, and that you are prepared for ownership after completion.
For more information contact Hari Pillai, Corporate Finance Manager, on 01242 776000 or hari.pillai@randall-payne.co.uk.