Buying an existing business is meant to be less risky than starting one from scratch. You’re acquiring a proven customer base, a working team, and a track record instead of building all three from nothing. That advantage only holds if the due diligence behind the purchase is genuinely thorough. For first-time buyers, it often isn’t, not through carelessness but because they don’t yet know which questions matter most.

Most first-time buyers focus heavily on the numbers: turnover, profit margin, asset value. That’s necessary but not sufficient. Some of the biggest risks in an acquisition sit outside the financials entirely, and they’re the ones that tend to get skipped.

Beyond the Financials: What Standard Checklists Miss

A basic due diligence checklist will tell you to review three years of accounts, check the balance sheet, and confirm outstanding liabilities. Fine as far as it goes. But for a business operating in Ireland specifically, there’s a second layer that generic templates don’t cover.

• Is the company actually in good standing with the CRO? A search of the Companies Registration Office should confirm the company’s filing history is current, that there are no outstanding annual returns, and that the shareholding structure matches what you’ve been told. Gaps here can point to wider governance problems, or complicate the transaction itself.
• Is there a Revenue tax clearance certificate, and is it current? Buyers sometimes assume a clean set of accounts means a clean tax position. It doesn’t automatically. A current tax clearance certificate, and a clear picture of any past Revenue audits or settlements, should be part of any offer that goes beyond a handshake.
• What happens to the lease? If the business operates from leased premises, the lease itself needs separate scrutiny from the business accounts. Commercial leases in Ireland often require landlord consent to assign, and terms can include break clauses, rent review dates, or repairing obligations that materially affect what you’re taking on. A business can look financially sound and still come with a lease that undermines the deal.
• What are your obligations to existing staff? Under Irish and EU transfer of undertakings rules, employees generally transfer to the new owner on their existing terms and conditions when a business changes hands. First-time buyers are frequently surprised to learn they can’t simply renegotiate contracts, roles, or pay on day one. Understanding what you’re inheriting on the employment side, including any pension obligations or long-service liabilities, needs to happen before you agree a price, not after.

Questions About the Business Itself, Not Just Its Numbers

• How much of the business depends on the current owner personally? This is one of the most consistently underestimated risks in SME acquisitions. If key customer relationships, supplier terms, or institutional knowledge live entirely with the outgoing owner and haven’t been documented or transferred, the business you’re buying may perform very differently once they’ve left.
• How concentrated is the customer base? A business earning most of its revenue from two or three clients carries a different risk profile than one with a broad base, even if the headline turnover is identical. Ask what happens to those relationships post-sale, and whether contracts are formalised or based on goodwill.
• Are there contracts, licences, or accreditations tied specifically to the current owner or entity? Certain sector licences, insurance arrangements, or supplier accreditations may not transfer automatically with a change of ownership. Confirming what needs to be reapplied for, and how long that takes, should happen well before completion.

Due diligence isn’t a formality between agreeing a price and signing contracts. Done properly, it can change the price, the structure of the deal, or whether it proceeds at all.

Why This Stage Determines the Deal, Not Just the Price

Buyers who treat due diligence as a box-ticking exercise tend to be the ones who discover problems after completion, when their options for addressing them are far more limited.

Working with an independent advisor through this stage means having someone whose job is to find the problems before you own them, not after.