What Financial Due Diligence Should a Business Buyer Expect?

The decision in brief

Headline accounts alone are not a sound basis for agreeing a purchase price. As a buyer, you should expect financial due diligence to test financial performance, the balance sheet and future cash needs.

Reported profit can include adjustments, unpaid sales or costs that will change after acquisition, so it does not establish what you are buying. A useful review connects the accounts to supporting records and separates maintainable earnings from timing differences, unusual items and assumptions about future trading.

Start by agreeing which questions the review needs to answer, what information is available and how the findings will affect your decision.

Key Takeaways

• Financial due diligence tests earnings, cash requirements and liabilities against supporting records, rather than relying on headline accounts alone.
• Proposed profit adjustments need evidence, including whether costs are genuinely exceptional and whether replacement costs will arise after acquisition.
• Normal working capital and net debt can affect the amount payable, so their definitions belong in the deal terms.
• Findings should identify price implications, funding requirements and unresolved risks, with clear limits where information is incomplete.
• Agree the scope and fees before work starts, with depth proportionate to the business and transaction.

Buy-side financial due diligence should help you assess whether the financial evidence supports the proposed purchase. ICAEW identifies testing the deal rationale and supporting valuation as purposes of the work.

The scope depends on the business, transaction structure and available information. Reviewing statutory accounts is only one part of it. Financial due diligence does not replace separate legal, commercial or technical reviews.

A review of earnings, cash, working capital and liabilities

Maintainable earnings are the profits the business can reasonably sustain after supported adjustments. They are a basis for assessing value, not a guarantee of future performance.

Cash analysis examines how trading converts into money available to the business. Capital spending matters because equipment or systems may need investment even when reported profit appears healthy.

Working capital covers operating balances such as debtors, stock and creditors. The review should establish a normal level for the business. Net debt and other obligations need separate attention because they may reduce the purchase price or require cash after completion.

The records the buyer may be asked to provide

Most target records come from the seller, although your adviser may ask you to supply information already received. Expect requests for statutory accounts, monthly management accounts and balance sheets, general-ledger detail and board reports.

Customer or product breakdowns help explain trading. Aged debtor and creditor reports, stock schedules, bank statements, loan agreements and lease details support balance-sheet analysis. Tax returns and forecasts provide further evidence of liabilities and expected cash requirements.

Your adviser may also need your proposed deal terms, funding assumptions and acquisition model. Further requests should follow the questions raised by the records. Missing information should remain visible as a limitation, rather than being treated as evidence that no problem exists.

How advisers test profit, revenue and cash flow

Figures should be traced to source records and compared across periods. A total can reconcile to the accounts while still concealing a weak month, disputed sale or change in accounting treatment.

How quality of earnings reveals maintainable profit

A quality-of-earnings review explains the bridge between reported profit and adjusted EBITDA, or earnings before interest, tax, depreciation and amortisation.

Every proposed add-back needs evidence. Ask whether the cost was exceptional, whether it affected cash and whether it will recur under your ownership. A seller's description of a cost as "one-off" is not sufficient support.

Owner remuneration, related-party charges and accounting changes need particular care. Removing an owner's salary may increase adjusted earnings, but replacing their operational role can create a new cost. Monthly and segment-level trends should show whether the adjusted result reflects current trading.

How revenue, margins and working capital are checked

Contracts, invoices and cash receipts help test revenue where records allow. Revenue cut-off examines whether sales belong in the period reported. Recurring income needs support from contract terms and customer behaviour.

Customer concentration and margin trends should be examined alongside revenue growth. Higher sales do not establish stronger profitability if delivery costs rise faster.

Monthly debtor, creditor and stock movements reveal collection delays, payment patterns and seasonal funding needs. These movements inform a normalised working-capital target. Choosing an unusually low month can leave you paying the agreed price and then funding an operating shortfall.

How cash, debt and hidden obligations are reconciled

Cash conversion should explain the difference between earnings and actual cash movements. Capital spending, tax payments, financing and working-capital changes require separate analysis.

Advisers reconcile bank balances and finance agreements, then investigate potential debt-like items. These may include lease liabilities, deferred consideration, pension obligations and other future cash outflows.

An accounting classification does not settle the purchase-price treatment. The deal documents need agreed definitions of cash, debt and debt-like items, with consistent treatment across the calculations.

How findings can change the price and protect the buyer

A useful financial due diligence report connects findings to transaction decisions. Expect an adjusted-earnings bridge, net-debt reconciliation and working-capital analysis, together with cash-flow findings and forecast risks.

Separate supported conclusions from unresolved questions. If projected growth depends on hiring, new contracts or improved collections, identify the assumptions and their cash consequences. A forecast can be internally consistent without being commercially achievable.

The report should also distinguish a valuation issue from a funding requirement. A business can support the negotiated price yet require additional cash shortly after completion.

Red flags that deserve a closer look

Unsupported profit adjustments, weakening recent trading and unexplained gaps between profit and cash need investigation. None establishes that the business is a bad purchase on its own.

Overdue or disputed debtors may affect recoverable value. Unusual stock levels can indicate seasonal preparation, slow-moving goods or unreliable records. The explanation changes the financial consequence.

Customer concentration, tax exposures and forecasts that repeatedly miss actual results also deserve attention. Separate a documented liability from a possible exposure, and quantify the effect where evidence permits. If records remain unreliable, the uncertainty should affect the scope, confidence in valuation or deal protections.

Turning financial risks into clear deal terms

Agree what counts as cash, debt and debt-like items before relying on an equity-value calculation. The same applies to the working-capital target and the accounting rules used to measure it.

Completion accounts use actual balances at completion, followed by a post-completion adjustment. Clear rules reduce disagreement about classifications, provisions and calculation methods.

A working-capital target is only useful if the target and completion calculation use consistent definitions and accounting rules.

Identified liabilities may require a price adjustment, specific contractual protection or another agreed treatment. Financial due diligence informs those decisions, but the sale agreement needs legal advice. It does not replace it.

Frequently Asked Questions

When should a buyer start financial due diligence?

Start once you have enough information and access to assess the opportunity meaningfully. Timing depends on the deal and the quality of the records. An early review can identify issues before detailed negotiations, although further work may be needed as terms and information develop.

How long does financial due diligence take?

Duration depends on the target's size, complexity, record quality and speed of information sharing. Agree a timetable around the transaction's decision points, with responsibility for responding to requests. Incomplete records or unresolved findings can extend the work; there is no reliable standard duration for every purchase.

Is financial due diligence the same as an audit?

An audit gives an opinion on financial statements within its agreed scope. Financial due diligence is a deal-focused review of matters affecting value, cash requirements and risk. Audited accounts can support the work, but they do not answer every acquisition question or establish the appropriate purchase price.

Does a smaller business still need financial due diligence?

The depth and cost can be scaled to the transaction. A focused review may be appropriate for a smaller business, but you still need evidence about earnings, cash, working capital and liabilities. Limited scope should be explicit, including which risks remain outside the agreed work.

Who pays for financial due diligence?

The buyer commonly appoints and pays their own adviser, although arrangements vary by transaction. Scope and fees should be agreed before work starts. Separate the initial review from any additional work that may be needed if findings require deeper investigation or the transaction structure changes.

Agree a focused scope before committing

Good financial due diligence tests the financial story behind the accounts and its implications for your purchase. The strongest output connects evidence about earnings, cash requirements and liabilities to price and deal terms.

Agree a focused scope before committing to the purchase, including the questions that could change your decision and any limits on the work. Keep unresolved matters visible rather than treating an incomplete review as a clean result.

We can help scope transaction support using the information already available and your proposed deal terms. You do not need a complete data room to begin that discussion.