Acquisition due diligence should test whether a business is worth owning, whether its earnings will survive the transfer, and whether the buyer can manage the risks at the proposed price. Review commercial prospects, financial evidence, legal obligations, people and integration needs together. A clean document room is not an investment decision.
This guide from Praevion Consulting Inc., a Toronto management consulting firm serving Ontario and Canada, explains five buyer checks. It focuses on the evidence needed before committing, with specialist advice matched to the transaction.
“The most useful acquisition question is not whether the business performed well under its current owner. It is whether those results can continue under yours, at a price that leaves room for uncertainty.”
Mehrzad Verdizadegan, PhD
CEO, Praevion Consulting Inc.
1. What should acquisition due diligence prove?
Write the reason for buying before examining the seller’s presentation. State which customers, capabilities or market position justify the purchase, what must remain true after closing, and which finding would cause you to withdraw. This gives the review a decision standard.
For each assumption, name the evidence and a reviewer. If the attraction is recurring revenue, inspect renewals, cancellations and contract terms. If it is technical expertise, establish who holds that knowledge and whether they intend to stay. BDC frames due diligence as testing the buyer’s investment assumptions, including commercial, financial and legal risks.
2. Can the earnings support the purchase?
Distinguish reported profit from earnings the new owner can sustain and cash available after operating needs. Ask an accountant to reconcile the figures, assess unusual adjustments and model working capital, investment requirements and financing obligations under realistic downside conditions.
BDC recommends reviewing historical accounts alongside current results and supporting records; a quality-of-earnings review examines the reliability and sustainability of earnings. Our practical test is to challenge every adjustment: would this cost disappear under new ownership, or would another cost replace it?
For example, removing an owner’s salary without allowing for replacement leadership overstates the benefit. Keep the purchase price, transaction costs, integration spending and cash buffer visible in one funding plan. Set acceptable downside limits with the lender before negotiating final terms.
3. What could disappear when ownership changes?
Assess the relationships and operating knowledge that hold the business together. A customer list does not prove customer loyalty, and a management chart does not prove independent leadership. Test concentration, contract renewal, supplier alternatives and the founder’s involvement in daily decisions.
| Assumption | Evidence to test | Decision consequence |
|---|---|---|
| Customers will stay | Renewals, margins and permitted customer discussions | Revise revenue assumptions or require transition support |
| Managers can operate independently | Delegated decisions and key-person interviews | Fund capability gaps before handover |
| Systems can support growth | Capacity, licences, incidents and upgrade costs | Include investment needs in the purchase case |
Use controlled access agreed with the seller. Employees and customers should not learn about confidential negotiations through an unplanned diligence request.
4. Which obligations could change the deal?
Have transaction counsel identify what the buyer will acquire, assume or need permission to transfer. Review contracts, employment obligations, disputes, permits, intellectual property and relevant regulatory approvals. The scope depends on the business and the proposed asset or share transaction.
Information sharing also needs controls. Where PIPEDA applies, section 7.2 makes the business-transaction exception conditional, including necessity, safeguards and an agreement limiting use. It is not permission to copy all employee or customer records. Ask counsel to confirm the applicable privacy regime and disclosure process.
5. Does buyer readiness match integration risk?
Decide whether the acquiring team has the time, leadership and funding to operate the combined business. Every material diligence finding should become a priced risk, a closing condition, an integration action or a reason to stop. Do not leave findings stranded in reports.
McKinsey’s large-deal research stresses protecting existing business momentum during integration. For a smaller buyer, the practical implication is to appoint someone to protect daily trading while another person coordinates the handover.
Praevion’s Canadian financial-services integration case describes unclear responsibilities and duplicate processes after an acquisition. Its qualitative, company-reported results illustrate why operational readiness belongs in the purchase decision; they do not establish an expected acquisition return.
Finish with a written decision: proceed, renegotiate, pause for missing evidence, or withdraw. Name who accepts each remaining risk and who owns the first action after closing.
Frequently asked questions
Buyers often need to distinguish a specialist report from an investment decision. These answers clarify the limits of financial review and the point at which uncertainty should change the transaction, rather than simply produce another request for documents.
Is a financial review enough before buying a business?
No. Financial review tests the numbers, but the buyer must also examine customer continuity, legal exposure, people and operating requirements. A profitable business can still be unsuitable if its value depends on relationships or capabilities that will not transfer.
When should a buyer walk away?
A buyer should consider withdrawing when material evidence remains unreliable, a major risk cannot be managed, or the price no longer supports an acceptable return. Define those conditions before negotiations intensify, then record the decision against the evidence rather than sunk advisory costs.
Praevion’s management consulting services help leaders assess operating readiness and execution risks. Discuss the management questions behind your acquisition. Explore related guidance in our Knowledge Hub.
General management guidance. Obtain qualified advice for transaction-specific legal, tax and financial decisions. Research reviewed 14 September 2026. CEO wording is an editorial perspective prepared for this article.
References
The sources below support the factual claims and professional guidance cited in this article. Praevion case outcomes are company-reported. The proposed decision tools and review intervals are practical recommendations, not universal benchmarks or guarantees of results.
- BDC, How to conduct due diligence when buying a business; updated 24 November 2025
- Justice Canada, PIPEDA section 7.2; current text consulted September 2026
- McKinsey, Post-close excellence in large-deal M&A; 29 June 2021
- Praevion Consulting Inc., Post-Merger Organizational Integration; company case study
Illustrative photographs, not client images, in order: Sebastian Herrmann, Jakub Żerdzicki, Dylan Gillis, Headway, on Unsplash, under the Unsplash licence.
