Financial Due Diligence Checklist Template

The headline multiple is agreed before diligence starts. What you actually pay depends on the EBITDA, working capital and net debt numbers that survive it.

Financial due diligence tests whether a target’s reported numbers support the price. This free checklist is for buy-side deal teams, corporate development and the advisers who run quality of earnings work for them. It covers normalised EBITDA, revenue and cash proof, working capital and the peg, net debt and debt-like items, tax exposures and the forecast. Answers recorded at the start switch on what each deal needs: a leakage review for locked box deals, the peg for completion accounts, and US or UK tax tasks. The deal lead approves the findings before they reach the investment committee.

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Last reviewed: October 2026

An Audit, a Quality of Earnings Review and Full Deal Diligence Answer Different Questions

A clean audit opinion says the accounts are free of material misstatement. It does not say the earnings will recur, that working capital is at a normal level or that every inherited liability is in the net debt schedule. Financial due diligence answers those questions, and its output goes straight into the price: adjusted EBITDA for the multiple, a peg or locked box balance sheet, and debt-like items to deduct.

A quality of earnings report is not an audit and gives no assurance opinion, so the scope, data cut-off and basis of preparation matter: lenders and warranty insurers look for them first. Our M&A Due Diligence Checklist coordinates all nine acquisition workstreams; this template is the detailed finance workstream under it.

Statutory audit

Are the accounts fairly stated?

Looks at: one year end, against GAAP.

Ignores: whether profit will recur or cash conversion holds.

Output: an opinion addressed to shareholders.

Financial due diligence

What are we really buying?

Looks at: monthly data over two to three years plus the trailing twelve months.

Work: normalise EBITDA, set the peg, find debt-like items, prove cash.

Output: numbers that move the price and the SPA.

Full M&A diligence

Should we do the deal at all?

Looks at: commercial, legal, tax, people, technology and ESG as well as finance.

Work: parallel workstreams run by different advisers.

Output: an investment committee paper.

What the Financial Due Diligence Checklist Covers

Six phases run on every deal. The locked box phase appears only when the price mechanism is a locked box, and individual tasks switch on for a vendor report, a completion accounts deal or the target’s tax jurisdiction.

Phase 1

Phase 1: Scope, Data Request & Basis of Preparation

Owned by the deal lead. The answers recorded here decide which later phases and tasks appear.

  • Record the deal basics — target, headline price or multiple, price mechanism (completion accounts or locked box), the target’s tax jurisdiction (US, UK or both) and whether a vendor due diligence report exists
  • Agree the scope and periods with the deal lead — commonly two to three financial years, the year to date and the trailing twelve months, by entity; note anything out of scope
  • Set the materiality threshold for adjustments and findings — so time goes on items that can move the price
  • Issue the financial information request list — trial balances, management accounts, bank statements, aged ledgers, tax returns and the budget
  • Record the reporting framework and any policy changes — US GAAP, IFRS or FRS 102; audited, reviewed or unaudited; changes in revenue, capitalisation or lease policies across the periods
  • Reconcile monthly trial balances to the annual accounts and management accounts — every later analysis builds on this tie-out
  • Read the vendor report and agree reliance terms — shown only when a vendor report exists; note its data cut-off, scope limits and the adjustments you do not accept
Phase 2

Phase 2: Quality of Earnings & Normalised EBITDA

Owned by the financial due diligence lead. Every adjustment carries its evidence as an attachment.

  • Build the EBITDA bridge — reported, then management-adjusted, then diligence-adjusted, each adjustment on its own line with a reference
  • Test each management adjustment against evidence — reject unsupported run-rate savings and synergies the buyer, not the seller, will create
  • Remove non-recurring and out-of-period items — litigation settlements, restructuring, one-off grants, prior-year corrections booked in the current year
  • Normalise owner and related-party costs — owner salaries and related-party rent restated to what the business will pay after completion
  • Label pro forma adjustments separately — acquisitions annualised, closed sites removed, new contracts; keep them apart from diligence adjustments
  • Check accounting policies for earnings quality — revenue recognition, capitalised development costs and lease accounting applied consistently across every period
  • Compare adjusted EBITDA with operating cash flow — low cash conversion is the most common sign that earnings are not what they seem
Phase 3

Phase 3: Revenue, Customers & Proof of Cash

  • Analyse revenue by customer, product, geography and channel — with top-ten concentration and any customer above the threshold you set in Phase 1
  • Split revenue growth into price and volume — and gross margin by product, so the forecast can be tested later
  • For recurring revenue, reconcile ARR or MRR to recognised revenue — and analyse churn and retention by cohort
  • Test cut-off and credit notes around period ends — bill-and-hold, side letters and credits raised after the year end
  • Review deferred and accrued income against contract terms — it feeds both working capital and the debt-like items debate
  • Perform a proof of cash for sample months — bank receipts and payments reconciled to recorded revenue and costs
Phase 4

Phase 4: Working Capital, Net Debt & Debt-Like Items

The two peg tasks are shown only when the price mechanism is completion accounts.

  • Agree the definition of net working capital — trade items only; cash, borrowings, tax and debt-like items sit elsewhere so nothing is counted twice
  • Analyse monthly net working capital over 12 to 24 months — normalised for one-offs, with seasonality and any stretching of creditors before the sale
  • Propose the working capital peg — commonly an average of normalised monthly balances over the trailing twelve months, adjusted for seasonality and growth
  • Draft the completion accounts policies with legal counsel — the hierarchy of specific policies, consistency with past accounts, then GAAP
  • Build the net debt schedule — borrowings, accrued interest, finance leases, overdrafts, and cash that is trapped or held for customers
  • List debt-like items for negotiation — unpaid prior-period tax, accrued bonuses, deferred consideration, pension deficits, dilapidations, aged payables and, by agreement, deferred revenue
  • Split capital expenditure into maintenance and growth — record any deferred maintenance as a debt-like item or a price point
Phase 5 — Locked Box Only

Phase 5: Locked Box Balance Sheet & Leakage

Shown only when the price mechanism is a locked box. There is no post-completion true-up, so the work happens before signing.

  • Assess the locked box balance sheet — its date, whether it was audited or reviewed, and how far it sits from the expected signing date
  • Test cash, debt and working capital at the locked box date — the price is fixed on these balances
  • Identify leakage since the locked box date — dividends, management fees, bonuses, related-party payments and seller transaction costs paid by the target
  • Agree the permitted leakage schedule with legal counsel — ordinary salaries and items in the budget the buyer has seen
  • Review bank movements from the locked box date to signing — every payment to a seller or connected party is explained
Phase 6

Phase 6: Tax Exposures

US and UK tasks are shown from the jurisdiction answer in Phase 1. Specialist tax advisers usually own this phase.

  • Map open tax years and enquiries — filed returns, payments and any audits or enquiries in progress
  • US: review state nexus — sales tax registration under economic nexus rules since the 2018 Wayfair decision, and state income tax filings
  • US: review federal positions — research cost treatment under sections 174 and 174A, entity classification and any elections that shape the deal structure
  • UK: review corporation tax, VAT and PAYE — including off-payroll working (IR35) status decisions for contractors and any research and development claims
  • Quantify each exposure and propose its treatment — a specific indemnity, a debt-like deduction, an escrow or a warranty and insurance point
Phase 7

Phase 7: Forecast Review, Findings & Sign-Off

The deal lead approves the findings report. A Not approved answer returns it to the due diligence lead and holds the checklist.

  • Rebase the forecast on diligence-adjusted EBITDA — the forecast should start from the number you accept, not the one in the deck
  • Test forecast assumptions against history — growth, margin and working capital assumptions compared with what Phases 2 to 4 found
  • Summarise price impact — adjusted EBITDA times the multiple, less net debt and debt-like items, plus or minus the working capital adjustment
  • List SPA protections for each finding — warranties, specific indemnities, escrow or a price reduction
  • Draft the findings report with its scope limitations and data cut-off date — lenders and insurers will rely on these
  • Deal lead approval of the findings report — before it goes to the investment committee or the lender

Where the Numbers Move the Price

Most findings land in the earnings the multiple applies to, the net debt deducted from enterprise value, or the working capital adjustment. Treatment is negotiated deal by deal, so read the table as a starting point, not a rule.

Item Usual home What to ask Phase
One-off legal or restructuring costsEBITDA adjustmentHas the same “one-off” appeared every year?2
Owner salary below marketEBITDA adjustment, downwardsWhat will a replacement cost after completion?2
Stretched creditors before the saleWorking capital or debt-likeAre payment days longer than the historical pattern?4
Deferred revenueWorking capital or debt-like, by agreementWhat does it cost to deliver the service already paid for?3, 4
Accrued bonuses and unpaid prior-year taxDebt-likeWas it earned or incurred before completion?4, 6
Earn-outs from the target’s own acquisitionsDebt-likeWhat is the likely payout, and when?4
Dividends or fees paid to sellers after the locked box dateLeakage, repaid pound for poundWas it on the permitted leakage list?5

The second table compares the two price mechanisms. US deals usually use a closing working capital adjustment, which works like completion accounts. Locked boxes are common in UK and European auctions.

Question Completion accounts or closing adjustment Locked box
When is the balance sheet fixed?At completion, then trued up afterwardsAt a past date before signing
Who bears trading risk between those dates?The seller, until completionThe buyer, from the locked box date
Key diligence outputWorking capital peg and accounting policiesLocked box balance sheet and leakage list
Main dispute riskPost-completion argument over the accountsLeakage claims

Watch lease accounting when comparing EBITDA. Under IFRS 16, lease costs leave EBITDA and reappear as depreciation and interest; under US GAAP (ASC 842), an operating lease stays in operating costs as a straight-line charge. Amendments to FRS 102 for periods beginning on or after 1 January 2026 bring most UK leases onto the balance sheet and add a five-step revenue model, so a UK target’s 2026 EBITDA may not compare with 2025. Check the lender’s covenant definitions too.

Why Run Financial Due Diligence in CheckFlow?

1

One checklist per deal, set up in a minute

The price mechanism, tax jurisdiction and vendor report answers shape the checklist. Conditional logic hides the locked box phase on a completion accounts deal and the US tax tasks on a UK target.

2

Adjustments with their evidence attached

Each adjustment task holds the schedule, the support and the comments that settled it, so when the seller challenges a number the reasoning is on the task.

3

Deadlines that match the deal timetable

Due dates are offsets from the day the checklist starts, so the plan moves with the deal timetable. The approval task on the findings report stops anything going to committee unsigned, and the activity trail exports with timestamps.

CheckFlow is not a data room, spreadsheet model or accounting system. Documents stay in the data room and the analysis stays in your workbooks. CheckFlow runs the workflow around them: who owns each analysis, what is still waiting on the seller, and who approved the report. Advisers running several deals see every open task in the Tasks grid; the professional services overview shows other client workflows.

For the full acquisition, pair this with the M&A Due Diligence Checklist or, for a sponsor-backed buyout, the Private Equity Due Diligence Checklist. If the target owns its premises, the Commercial Property Acquisition Due Diligence Checklist covers title, environmental and condition work. Sellers preparing for a process can use the Investor Data Room Checklist to get their documents in order first.

Frequently Asked Questions

What does financial due diligence include?

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The core is a quality of earnings analysis that turns reported EBITDA into a sustainable, diligence-adjusted figure. Around it sit revenue and customer analysis, a proof of cash, working capital and the peg, net debt and debt-like items, tax exposures and a forecast review. The findings feed the price, the purchase agreement and the lender’s credit paper.

Is a quality of earnings report the same as an audit?

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No. An audit gives an opinion on whether year-end accounts are fairly stated. A quality of earnings report gives no assurance opinion; it analyses monthly data to show which earnings recur, adjusts for one-off and owner-related items, and tests cash conversion. In the US it is commonly performed as a consulting engagement. Audited targets still need one.

How is the net working capital peg calculated?

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The peg is the level of working capital the buyer expects to receive with the business. It is commonly the average of normalised monthly balances over the trailing twelve months, so seasonal peaks and troughs even out, then adjusted for growth or known changes. If completion working capital is below the peg, the price falls by the shortfall; above it, the price rises.

What are debt-like items in due diligence?

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They are obligations that are not borrowings but will cost the buyer cash after completion for something that happened before it. Common examples are unpaid prior-period tax, accrued bonuses, deferred consideration from earlier acquisitions, pension deficits, dilapidations and deferred maintenance. Buyers deduct them from enterprise value alongside net debt; sellers argue some belong in working capital, deferred revenue most often.

What is the difference between buy-side and sell-side quality of earnings?

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A sell-side report, often called vendor due diligence in the UK, is commissioned by the seller before a sale so bidders work from the same analysis and problems surface early. A buy-side review is commissioned by the buyer and tests the numbers from the buyer’s point of view. Where one exists, buyers usually agree reliance terms and run targeted top-up work rather than starting again.

Is CheckFlow free for this template?

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