
Contentious Tax Bulletin
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Glossary
Buy-side due diligence is the structured investigation undertaken by a prospective purchaser before acquiring a business or investment. It involves reviewing financial, tax, legal and commercial matters to assess risks, validate value and inform transaction decisions.
Buy-side due diligence is conducted by or on behalf of an acquiring party in a merger, acquisition or investment transaction. Its purpose is to evaluate the target business and identify issues that may affect price, deal structure or post-transaction integration.
The process typically includes financial due diligence, which analyses historical performance, earnings quality, working capital and cash flow; tax due diligence, which reviews tax compliance, exposures and structuring considerations; legal due diligence, which examines contracts, liabilities and regulatory matters; and commercial due diligence, which assesses market position, customer base and growth prospects.
In the UK, findings from buy-side due diligence often inform share purchase agreements, warranties, indemnities and completion accounts mechanisms. It supports informed decision-making and helps purchasers understand both the risks and opportunities associated with the transaction.
Key characteristics of Buy-Side Due Diligence include:
Buy-side due diligence generally follows these stages:
A UK private equity firm agrees heads of terms to acquire a technology company. Financial advisers review recurring revenue, profitability and working capital trends. Tax specialists assess corporation tax compliance and potential exposures. Legal advisers examine material contracts and contingent liabilities. The combined findings influence the agreed purchase price and warranty protections in the share purchase agreement.
Buy-side due diligence does not guarantee that all risks will be identified.
It does not replace the need for contractual protections in transaction documents.
It is not limited to financial review alone.
Its purpose is to provide the buyer with an independent assessment of the target business, highlighting financial performance, risks, liabilities and commercial considerations that may affect valuation and deal terms.
The timeframe varies depending on transaction size and complexity, but it typically aligns with the agreed transaction timetable and may range from a few weeks to several months.
It is usually performed by external professional advisers, including accountants, tax advisers, lawyers and commercial consultants, appointed by the buyer.
Buy-side due diligence is commissioned by the purchaser. Vendor due diligence is commissioned by the seller and shared with potential buyers during a sale process.
We always recommend that you seek advice from a suitably qualified adviser before taking any action. The information in this glossary entry only serves as a guide and no responsibility for loss occasioned by any person acting or refraining from action as a result of this material can be accepted by the authors or the firm.
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