How to Carry Out a Due Diligence Investigation

Due diligence should help you decide whether to buy, on what terms and with what plan for ownership. It is most useful when it tests the assumptions behind your offer. Collecting documents is only the beginning.

Write down the investment case

Set out why the business is attractive, what must remain true for the price to make sense, and what would cause you to reconsider. If the attraction is dependable recurring income, investigate renewal rates and customer concentration. If it is a valuable brand, investigate ownership, protection and dependence on particular people.

Give each workstream an owner

Agree the scope of financial, tax, legal, commercial and operational investigations with your advisers. Include specialist areas where relevant, such as property, pensions, environmental matters or regulated activity. Record what is outside each adviser’s instruction so gaps do not hide between reports.

Keep confidentiality and access arrangements proportionate to the information involved. Restrict sensitive material to those who need it, and take advice before exchanging personal or competitively sensitive information.

Use one evidence and issue tracker

A useful tracker contains the question, requested evidence, response, date, reviewer, outstanding point and proposed action. Distinguish “received” from “reviewed” and “resolved”. If a seller says that a contract renews automatically, locate the contract and check the relevant terms.

Combine documentary review with appropriate conversations and operational checks. Ask the same practical question from different angles: a customer concentration issue may appear in revenue reports, contract terms and management interviews.

Connect findings to the decision

Summarise material findings in a short decision paper. Possible responses include further evidence, a revised valuation, a condition to completion, a contractual protection, an integration action or declining the opportunity. Your advisers should explain which response addresses the actual risk and which exposure remains.

For example, learning that the seller personally owns a key trade mark is not resolved by placing the registration in the data room. You need a plan for the relevant rights and a check that the agreed transaction delivers it.

Carry the findings into ownership

Build the post-acquisition action list while investigating. Assign responsibility for contract renewals, systems changes, customer retention and missing policies. The due diligence pack helps organise requests; the buyer workbook helps organise decisions. Neither replaces professional investigation of the transaction.