Financial Due Diligence
Executive Summary
Key Takeaways
- ✓ Financial due diligence establishes a normalized, reliable baseline of a target's historical financial performance, distinct from a forward-looking financial model review, which tests whether the forecast built on top of that baseline is structurally sound.
- ✓ Quality of earnings analysis is the central financial due diligence output, adjusting reported EBITDA for one-off, non-recurring, and non-operational items to arrive at a normalized figure the buyer can rely on as a pricing basis.
- ✓ Working capital analysis establishes a normalized net working capital level and trend, forming the basis for the net working capital peg — the target level the actual closing balance is measured against, with any shortfall or excess adjusting the final purchase price.
- ✓ Net debt and debt-like items — including off-balance-sheet obligations, deferred liabilities, and unfunded commitments — must be comprehensively identified, since an incomplete net debt bridge directly overstates the equity value a buyer is willing to pay.
- ✓ Every financial due diligence adjustment should be independently traceable to underlying data, not merely asserted, since normalized EBITDA and the net working capital peg are the two figures with the most direct dollar-for-dollar effect on the final purchase price.
Objective¶
This guide covers financial due diligence — the investigation of a target's historical financial performance, distinct from a forward-looking financial model review, within the M&A and Transaction Due Diligence pillar. Where a model review (covered on Financial Model Due Diligence) tests whether the forecast is structurally sound, financial due diligence tests whether the historical baseline that forecast is built on is reliable in the first place.
Core Areas¶
| Area | What It Establishes | Direct Effect on Pricing |
|---|---|---|
| Quality of earnings | Normalized EBITDA, adjusted for one-off and non-recurring items | Sets the earnings base a valuation multiple is applied to |
| Working capital analysis | Normalized net working capital level and seasonal trend | Sets the net working capital peg, a direct purchase price adjustment |
| Net debt and debt-like items | Comprehensive funded and off-balance-sheet obligations | Feeds the enterprise-value-to-equity-value bridge |
| Revenue quality | Recurring versus one-off revenue, customer concentration, contract terms | Informs forecast reliability and multiple applied |
| Capital expenditure history | Maintenance versus growth capex, deferred capex | Informs normalized free cash flow and future capex assumptions |
Quality of Earnings¶
The central financial due diligence deliverable — a detailed reconciliation from reported EBITDA to a normalized figure, removing one-off items (a litigation settlement, a one-time asset sale), non-recurring items (a restructuring charge unlikely to repeat), and non-operational items (owner compensation above market rate in a closely held business), and adjusting for any accounting policy differences between the target's historical presentation and the buyer's own standards. See Quality of Earnings for the full definition and adjustment categories.
Working Capital and the Net Working Capital Peg¶
Financial due diligence establishes a normalized net working capital level — typically a trailing twelve-month average, adjusted for seasonality — which becomes the net working capital peg written into the purchase agreement. At closing, the actual net working capital balance is measured against this peg, and any shortfall reduces the purchase price while any excess increases it, making an inaccurate or unrepresentative peg a direct, dollar-for-dollar pricing risk independent of the underlying business's real performance.
Net Debt and Debt-Like Items¶
A comprehensive net debt analysis extends beyond funded bank or bond debt to debt-like items that function economically as leverage or a deferred obligation — unfunded pension liabilities, finance lease obligations, deferred consideration from a prior acquisition, and material litigation reserves. An incomplete net debt bridge understates what a buyer is effectively assuming as part of the transaction and directly overstates the equity value the buyer is willing to pay, since enterprise value is converted to equity value by subtracting net debt.
Structural Checks Specific to Financial Due Diligence¶
| Check | What It Catches |
|---|---|
| Every quality of earnings adjustment traces to a specific, evidenced transaction or accounting entry | An unsupported normalization adjustment inflating EBITDA without evidentiary basis |
| Working capital peg calculation methodology is disclosed and consistently applied across the trailing period used | A peg calculated on a favorable, non-representative period rather than a genuine normalized average |
| Net debt bridge includes all debt-like items, not only funded bank and bond debt | An incomplete net debt figure that overstates the equity value paid |
| Quality of earnings findings reconcile to the acquisition model's normalized EBITDA input | A financial due diligence adjustment documented in a report but not actually reflected in the pricing model |
Common Failures¶
- Quality of earnings adjustments presented as a single net figure without a line-by-line reconciliation, making individual adjustments impossible to independently challenge.
- A net working capital peg calculated on an unrepresentative period (e.g., a seasonally favorable month) rather than a genuine normalized trailing average.
- Debt-like items — particularly unfunded pension obligations and finance lease liabilities — omitted from the net debt bridge, overstating equity value.
- Financial due diligence findings that never reach the acquisition model, leaving a normalized EBITDA figure calculated in a due diligence report that differs from the figure actually used to price the deal.
Continue Reading¶
Prerequisites¶
- M&A and Transaction Due Diligence — the parent pillar
- Due Diligence
Related Glossary¶
- Quality of Earnings
- Net Working Capital Peg
- Sources and Uses
- Working Capital Schedule
- Net Debt
- Enterprise Value
Related Technical Guides¶
Related Checklists¶
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Frequently Asked Questions
What is financial due diligence?
The investigation of a target company's historical financial performance — earnings quality, working capital trends, net debt, and off-balance-sheet obligations — to establish a normalized, reliable baseline before a transaction is priced.
How is financial due diligence different from a financial model review?
Financial due diligence establishes what actually happened historically and whether reported earnings are a reliable indicator of sustainable performance. A financial model review tests whether the forward-looking model built on top of that historical baseline — often incorporating the financial due diligence findings directly as inputs — is structurally sound and calculates correctly. The two are sequential and complementary; see Financial Model Due Diligence for the model-review-specific treatment.
What is quality of earnings analysis?
The core financial due diligence exercise of adjusting a target's reported EBITDA for one-off, non-recurring, and non-operational items, arriving at a normalized figure that more reliably represents sustainable, ongoing earnings — see Quality of Earnings.
Why does financial due diligence focus so heavily on working capital?
Because the net working capital peg — the target level established during diligence — directly adjusts the final purchase price dollar-for-dollar against the actual closing balance, making an inaccurate or unrepresentative peg one of the most direct ways a transaction can be mispriced.
What is included in a comprehensive net debt analysis?
Not just funded debt, but debt-like items — deferred consideration, unfunded pension obligations, finance lease liabilities, and other off-balance-sheet commitments — since an incomplete net debt bridge understates what a buyer is effectively assuming and overstates the equity value it is willing to pay.
How do financial due diligence findings flow into the transaction model?
Normalized EBITDA becomes the earnings base the valuation multiple is applied to; the net working capital peg becomes a specific purchase price adjustment mechanism; the net debt figure feeds the enterprise-value-to-equity-value bridge — see the existing EV-to-Equity Bridge glossary page and Sources and Uses.
Related Articles
M&A and Transaction Due Diligence
Transaction due diligence is the structured process by which a party to a proposed transaction — most often a buyer, but also a seller preparing for sale or a lender financing the deal — investigates a target business before committing capital. It is organized into distinct workstreams (financial, commercial, operational, technical, legal, tax, ESG), run from one of three process postures (buy-side, sell-side, or vendor), and its findings feed directly into the financial model used to price the transaction and support the investment decision. This page is the hub for the Knowledge Centre's transaction due diligence content: what due diligence is, how each workstream and process posture differs, and how model risk specifically enters a transaction — the angle this platform is built to address in depth.
Quality of Earnings
Quality of earnings (QoE) analysis is the central financial due diligence deliverable — a detailed reconciliation from a target's reported EBITDA to a normalized figure, removing one-off items, non-recurring items, and non-operational items to arrive at a figure that more reliably represents sustainable, ongoing earnings. Because the resulting normalized EBITDA is typically the earnings base a transaction's valuation multiple is applied to, an unsupported or aggressive quality of earnings adjustment has a direct, dollar-for-dollar effect on the price paid.
Net Working Capital Peg
The net working capital peg is a target level of net working capital, established during financial due diligence and written into the purchase agreement, against which the target's actual net working capital balance at closing is measured. Any shortfall below the peg reduces the purchase price, and any excess above it increases the purchase price, dollar for dollar — making the peg's calculation methodology one of the most commercially significant, and most frequently disputed, mechanics in a transaction.
Sources and Uses (of Funds)
A sources and uses statement is the schedule in a project finance model that lists every source of funding for a transaction, senior debt, subordinated debt, sponsor equity, grants, and any other funding instrument, against every use of that funding, construction costs, capitalized interest during construction, reserve account funding, financing fees, and contingency. The two sides must reconcile to the same total with no unexplained balancing figure. It is typically the first schedule built in a project finance model and the one lenders review first, because it is the clearest single statement of how a transaction is actually funded and what that funding is spent on.
Financial Model Audit Checklist
This checklist sets out the core structural checks that apply to any financial model regardless of sector or transaction type — formula integrity, circularity, linking, formatting, and output consistency. It is the flagship, general-purpose reference for teams running an internal review before a model is submitted for external audit, financing, or committee approval. Sector-specific and audience-specific checklists elsewhere in this section build on it rather than repeating it.
Acquisition Model Checklist
This checklist covers the structural checks specific to acquisition and M&A models, on top of the general financial model audit baseline. It focuses on the mechanics unique to deal models — synergy assumption traceability, purchase price allocation, debt and equity funding structures, and consistency between standalone and pro-forma combined entity figures. It is intended for buy-side and sell-side teams, and advisors, reviewing a model ahead of a transaction decision.
Merger Model and Accretion/Dilution Structure
A merger model tests whether a proposed acquisition increases or decreases the acquirer's earnings per share — the accretion/dilution result — by combining standalone projections for the acquirer and target with the mechanics specific to the transaction itself: purchase price allocation and the resulting goodwill, the financing structure (cash, new debt, or newly issued stock, in any combination), and any synergies expected from the combination. This guide covers the build sequence in full: standalone projections first, then purchase price allocation, then the financing structure and its effect on pro-forma shares and interest expense, then synergies traced to specific line items rather than a single aggregate assumption, and finally the accretion/dilution calculation itself, with the structural checks that catch the errors most specific to this model type.
Working Capital Schedule
A working capital schedule is the section of a financial model that calculates the period-by-period movements in a company's or project's net current assets — the difference between current assets (principally trade receivables) and current liabilities (principally trade payables and accrued liabilities). It translates revenue and cost accruals from the income statement into actual cash flows by capturing the timing difference between when economic activity is recognised and when cash is received or paid. Working capital is defined as: The working capital schedule calculates the change in net working capital in each period, which is a cash flow adjustment in the cash flow statement: - An increase in net working capital is a cash outflow (cash is being absorbed into receivables or inventory) - A decrease in net working capital is a cash inflow (cash is being released from payables or receivables)
Net Debt
Net debt is a company's total interest-bearing debt minus its cash and cash equivalents, and in some definitions its short-term investments. It represents the debt burden actually carried by the business after netting off readily available liquid resources that could, in principle, be applied against that debt. Net debt is the single largest and most consequential deduction in the standard bridge from enterprise value, the output of an FCFF-based DCF, to equity value, the value attributable to shareholders, and it must be measured as of the same valuation date as the DCF itself.