Is Your Business Valuation Defensible? Six Tests Every Valuation Report Should Pass | IBV™

A business valuation report can look impressive and still be difficult to defend.

Page count, polished graphics and a precise-looking number do not establish that the right asset was valued, the evidence was reliable or the selected method was appropriate. The real test comes when someone asks:

Why should this conclusion be relied upon?

That question may be asked by a buyer, shareholder, accountant, lawyer, lender, court, regulator or the Australian Taxation Office. A credible report should be able to answer it by showing a logical path from the valuation question, through the evidence and methodology, to the conclusion.

A defensible business valuation is not one that can never be disputed. Valuation involves professional judgement, and informed valuers can sometimes reach different conclusions. Defensibility means that the report’s purpose, evidence, assumptions, methods and reasoning are transparent, internally consistent and appropriate for the stated use.

The six tests below provide a practical framework for assessing whether a business valuation report has those qualities. They are not a substitute for the requirements of a particular law, court, regulator or professional standard. They are the questions an informed reader should be able to answer before relying on the valuation.

What Makes a Business Valuation Defensible?

A valuation conclusion is an estimate, not an observable fact. Even when the final amount is expressed to the nearest dollar, the analysis may depend on judgements about maintainable earnings, future growth, business risk, comparable transactions, working capital and the transferability of goodwill.

That does not make valuation arbitrary.

A defensible report constrains judgement through a disciplined process. It defines the question, identifies the relevant evidence, explains how that evidence was assessed, applies recognised valuation approaches appropriately and discloses the material assumptions and limitations.

For valuations prepared for Australian tax purposes, the ATO’s guidance places significant emphasis on the process and evidence supporting the result. It identifies appropriate methodology, transparent assumptions, recorded evidence and cross-checking—where possible—as valuation fundamentals. The ATO also makes clear that, in a tax context, the taxpayer retains responsibility for providing a valuation that can be supported even when a professional valuer has been engaged.

Outside taxation, the applicable legal and professional requirements may differ. Nevertheless, the same broad principle remains valuable: a conclusion is more credible when another informed person can understand what was valued, what information was used and why the analysis supports the result.

The Six Tests Every Business Valuation Report Should Pass

Test 1: Does the Report Define the Correct Valuation Question?

A valuation can be competently calculated and still answer the wrong question.

Before considering earnings or multiples, the report should identify:

• the client and intended users;
• the purpose of the valuation;
• the business, asset or ownership interest being valued;
• the valuation date;
• the basis or standard of value;
• the premise of value, where relevant;
• the scope of work; and
• material restrictions on the report’s use.

Each element can affect the conclusion.

What Exactly Is Being Valued?

“The business” may refer to an operating business, selected assets, all the shares in a company, units in a trust or a particular ownership interest. Those are not automatically equivalent.

A company may own surplus cash, debt, property, investments or non-operating assets in addition to the trading business. A minority interest may carry different rights, influence and marketability from a controlling interest. The report should identify the legal or economic interest being valued rather than leaving the reader to infer it.

Why Is the Business Being Valued?

A report prepared for internal planning may not have the same scope or reporting requirements as one prepared for taxation, litigation, financial reporting or a shareholder transaction.

Purpose also affects the instructions. A valuation does not determine whether a tax concession applies, how a contract should be interpreted or what orders a court should make. Those are tax or legal questions for the relevant advisers or decision-maker. The valuer’s task should be defined so that the report answers the valuation question without straying into unsupported advice.

Why Does the Valuation Date Matter?

Value is assessed at a particular date using information and circumstances relevant to that date. Performance, market conditions, debt, contracts, staffing and risk can change materially over time.

Later information may sometimes help confirm circumstances that existed at the valuation date, but hindsight should not be used to rewrite what market participants could reasonably have known or anticipated at that time. For tax valuations, the relevant legislation may prescribe the required date.

Test 1 passes when: a reader can identify precisely what was valued, for whom, for what purpose, on what date and under what definition of value.

Test 2: Is the Valuer Competent, Objective and Properly Instructed?

A defensible process requires more than a spreadsheet. The person undertaking the work should have appropriate valuation knowledge, commercial judgement and experience relevant to the assignment.

The report or engagement documentation should allow the reader to understand:

• who performed and took responsibility for the valuation;
• the valuer’s relevant qualifications and experience;
• whether specialist assistance was used;
• whether the valuer acted independently;
• any actual or potential conflicts of interest;
• whether the fee depended on the valuation outcome; and
• whether the scope was restricted by the client or by unavailable information.

Independence and competence are different. A valuer may be free from conflicts but lack the experience required for a complex asset. Conversely, a technically capable adviser may have a relationship or financial interest that requires disclosure and management.

Independence Should Be Evidenced, Not Assumed

An “independent” label is meaningful only when the valuer’s objectivity has not been compromised and the engagement is not structured to reward a particular result.

APES 225 requires members of Chartered Accountants Australia and New Zealand, CPA Australia and the Institute of Public Accountants to comply with its independence requirements when a valuation service requires independence or is presented as independent. The standard also prohibits contingent fees for such services.

APES 225 does not formally govern a valuer who is not a member of one of those bodies. A non-member should therefore not state that an engagement was conducted in accordance with APES 225. The valuer may voluntarily adopt relevant procedures or principles reflected in the standard, but should accurately disclose the credentials and standards that do apply.

Scope Limitations Must Be Visible

Instructions can weaken a valuation if they prevent the valuer from performing work that would ordinarily be necessary. Examples may include being told not to analyse the industry, being denied customer data or being required to adopt management forecasts without adequate enquiry.

That does not mean every limited-scope engagement is invalid. It means the limitation, its potential effect and the nature of the resulting conclusion should be transparent.

APES 225 distinguishes between a Valuation Engagement, a Limited Scope Valuation Engagement and a Calculation Engagement. Those classifications formally apply to members governed by the standard, but the underlying distinction is useful for all clients: the scope of work affects what the conclusion can reasonably support.

Test 2 passes when: the valuer’s competence, objectivity, role and scope are clear, and no undisclosed restriction appears to have shaped the conclusion.

Test 3: Is the Valuation Supported by Sufficient and Relevant Evidence?

A conclusion is only as reliable as the evidence beneath it.

Depending on the engagement, relevant information may include:

• historical financial statements and tax returns;
• current management accounts;
• budgets and forecasts;
• revenue and margin by product, service or customer;
• details of owner remuneration and related-party transactions;
• debt, cash, working capital and surplus assets;
• customer, supplier and employee concentration;
• contracts, leases, licences and shareholder agreements;
• intellectual-property ownership;
• industry and economic information; and
• evidence supporting proposed adjustments to earnings.

The report should identify the specific information relied upon and explain the extent to which it was reviewed. It should not create the impression that the valuer audited or independently verified information if that work was not performed.

APES 225 expressly defines a valuation as not involving verification of the information concerning the asset being valued. At the same time, it requires members providing valuation services to gather sufficient and appropriate evidence—through means such as inspection, enquiry, computation and analysis—to provide reasonable grounds for the report and conclusion.

Those propositions are not contradictory. A valuation is not an audit, but neither should it involve unquestioningly transferring management’s numbers into a model.

Are the Earnings Adjustments Supported?

Maintainable earnings often require adjustments to reported results. These may relate to owner remuneration, personal expenses, non-commercial related-party transactions, non-recurring items or costs a buyer would need to introduce.

Every material adjustment should have:

• a clear description;
• an amount that can be traced to source information;
• a commercial rationale;
• consistency across the periods analysed; and
• appropriate treatment for tax, depreciation or other consequential effects, where relevant to the selected earnings measure.

Adjustments should not operate only in the direction that supports the preferred outcome. Adding back a one-off expense while ignoring the commercial salary required to replace an owner is not balanced analysis.

Are Forecasts Evidence-Based?

Forecasts should be tested against historical performance, current trading, capacity, contracts, the sales pipeline, required investment and relevant market conditions. A management forecast is an input—not proof that the forecast will occur.

The report should explain whether forecasts were prepared before the valuation, whether they have been revised and how their assumptions compare with demonstrated performance.

Test 3 passes when: material facts, adjustments and forecasts can be traced to credible sources, inconsistencies are addressed and the report states the extent of the valuer’s review.

Test 4: Is the Valuation Method Appropriate and Correctly Applied?

No valuation method is automatically correct for every business.

International Valuation Standards organise valuation methods under three principal approaches:

• the market approach, which uses market evidence involving identical or comparable assets;
• the income approach, which converts expected income or cash flow into a present value; and
• the cost approach, which considers the current replacement or reproduction cost of an asset’s service capacity.

For businesses and business interests, the relevance of each approach depends on the nature of the entity, the purpose and basis of value, the information available and the behaviour of market participants.

A defensible report should explain:

• which approaches and methods were considered;
• why the selected method suits the business and valuation purpose;
• how the method was applied;
• why other potentially relevant methods were not used;
• whether the method is consistent with the selected basis of value; and
• whether a secondary method or cross-check supports the conclusion.

A Multiple Is Not a Methodology by Itself

“Profit multiplied by four” is a calculation. It becomes meaningful only when the report explains:

• which profit measure is being used;
• how maintainable earnings were determined;
• whether the multiple represents enterprise or equity value;
• the source and relevance of the multiple;
• the risk and growth characteristics reflected in it; and
• how debt, cash, working capital and surplus assets are treated.

An industry rule of thumb may be a useful reasonableness check. It is rarely a substitute for business-specific analysis when substantial tax, legal or ownership decisions depend on the result.

Discounted Cash Flow Is Not Automatically More Accurate

A discounted cash flow model can be appropriate when forecasts are sufficiently reliable and the timing of cash flows matters. It can also create an illusion of precision if small changes in growth, margins, discount rate or terminal value materially change the conclusion.

The sophistication of the model does not compensate for weak inputs. The report should explain and test the assumptions that drive the result.

Cross-Checks Increase Confidence

The ATO recommends, where possible in tax valuations, applying a secondary or cross-check methodology to provide additional support for the primary method. APES 225 similarly says members should consider explaining other methods considered and why they were not relevant, and including enough calculation detail for a reader to understand the conclusion.

A cross-check should be genuinely informative. Repeating the same assumptions in a slightly different formula does not provide independent support.

Test 4 passes when: the selected method follows the facts, is applied consistently and is supported by a meaningful explanation and, where appropriate, a cross-check.

Test 5: Are the Assumptions, Inputs and Calculations Transparent?

Valuation cannot avoid assumptions. Defensibility depends on making the material assumptions visible and explaining their basis.

Important assumptions may concern:

• maintainable revenue, margins and expenses;
• customer retention and recurring revenue;
• owner replacement costs;
• forecast growth;
• working-capital requirements;
• capital expenditure;
• tax rates;
• discount or capitalisation rates;
• terminal value;
• market multiples;
• debt and surplus assets; and
• minority, control or marketability considerations.

A reader should not need to reverse-engineer the report to discover what produced the conclusion.

Can the Numbers Be Followed?

Transparency means that key calculations reconcile. Historical results should connect to adjusted earnings. Adjusted earnings should connect to the amount capitalised or forecast. Enterprise value should reconcile to equity value. The final conclusion should reconcile to the calculation pages.

“Replicable” does not necessarily mean that every competent valuer will reach the identical number. Judgement remains involved. It means the analytical pathway is documented well enough for an informed reader to understand the inputs, repeat the calculation and identify where professional judgement affected the result.

Are Market Inputs Genuinely Comparable?

Comparable transactions or listed companies should be selected and interpreted carefully. Relevant differences may include size, profitability, growth, geography, customer concentration, recurring revenue, asset intensity, owner dependence and transaction structure.

The report should identify the evidence at a level permitted by confidentiality and data licences, explain the selection criteria and disclose material adjustments. A broad “industry average multiple” with no source, date or comparability analysis is difficult to test.

Does Sensitivity Analysis Reveal the Real Risk?

Sensitivity analysis can show how the conclusion changes when material assumptions change. It is particularly valuable where the result is highly dependent on forecasts, terminal growth, discount rates or a narrow range of market multiples.

Sensitivity analysis does not excuse an unsupported central assumption. Its purpose is to expose the effect of uncertainty, not to make any assumption acceptable.

Test 5 passes when: the material assumptions are disclosed, the inputs have an identifiable basis and the calculations can be followed from source information to conclusion.

Test 6: Does the Conclusion Follow Logically From the Analysis?

The final test brings everything together.

A conclusion is not defensible merely because each section of the report exists. The sections must be consistent with one another.

Check whether:

• the conclusion relates to the asset and valuation date defined at the beginning;
• the selected method is consistent with the stated basis and premise of value;
• the risk discussion is reflected in the multiple, capitalisation rate or discount rate;
• forecast growth is consistent with capacity and required investment;
• debt, cash, working capital and surplus assets are treated consistently;
• cross-checks support—or adequately explain differences from—the primary result;
• limitations and qualifications are carried into the conclusion; and
• the final value does not imply false precision beyond the quality of the evidence.

The report should also make clear whether the conclusion is a single amount or a range and what that form of conclusion means within the engagement.

A Range Is Not Necessarily a Weakness

A range may appropriately reflect uncertainty in the evidence or the reasonable outcomes supported by different assumptions. A single amount may be required for a particular purpose, but presenting one figure does not eliminate uncertainty.

What matters is whether the chosen conclusion is supported by the analysis rather than selected from it.

Report Length Is Not the Measure of Quality

A long report may still avoid the critical issues. A concise report may be robust if it clearly communicates the scope, evidence, methodology, assumptions and conclusion required for the engagement.

APES 225 requires governed members’ written valuation reports to communicate specified matters, including the asset, valuation date, purpose, scope, basis and premise of value, independence status, methods, information relied upon, material assumptions, conclusion and material qualifications. The exact requirements for a non-member or another engagement may differ, but those elements provide a useful benchmark for what an informed reader needs.

Test 6 passes when: the conclusion is the logical outcome of the report—not an unsupported number placed after the analysis.

Business Valuation Report Red Flags

The following warning signs do not prove that a valuation is wrong. They indicate questions that should be answered before the report is relied upon:

• the asset or ownership interest is described vaguely;
• no clear valuation date is stated;
• the purpose and intended users are unclear;
• the report does not define the basis or standard of value;
• the valuer’s qualifications, role or independence are not disclosed;
• material scope limitations are hidden or minimised;
• management figures are accepted without visible analysis;
• earnings adjustments are unsupported or consistently one-sided;
• forecasts materially exceed historical performance without explanation;
• an industry multiple is used without a source or comparability analysis;
• the report does not explain why the selected method is appropriate;
• calculations cannot be reconciled to the final conclusion;
• enterprise value and equity value are confused;
• debt, working capital or surplus assets are treated inconsistently;
• significant assumptions appear only in fine print; or
• the conclusion is more precise than the evidence appears to support.

One red flag may have a reasonable explanation. Several unresolved red flags suggest that the valuation should be reviewed before it supports a consequential decision.

How to Review a Business Valuation Report in Ten Minutes

A complete technical review takes longer, but an initial reading can identify whether the report deserves closer attention.

Step 1: Read the Instructions and Conclusion First

Confirm what was valued, why, at what date and under what definition of value. Then check that the conclusion answers that exact question.

Step 2: Find the Maintainable Earnings Bridge

Trace reported results to adjusted earnings. Identify the largest adjustments and ask whether the source and commercial rationale are evident.

Step 3: Identify the Primary Method

The method should be stated plainly. Look for an explanation of why it was selected and how it was applied.

Step 4: Locate the Critical Assumptions

Find the multiple, discount rate, capitalisation rate, forecast growth, margin and terminal-value assumptions that have the greatest effect on the result.

Step 5: Reconcile Enterprise Value to Equity Value

If relevant, check the treatment of debt, cash, surplus assets, non-operating liabilities and working capital.

Step 6: Read the Limitations and Qualifications

Understand what information was unavailable, what was not verified, who may rely on the report and whether a restricted scope affected the conclusion.

This initial review will not determine whether every technical judgement is correct. It will reveal whether the report provides a visible path for a deeper review.

When Is a Defensible Business Valuation Particularly Important?

The consequences of weak support increase when the valuation affects tax, ownership, legal rights or substantial capital.

Business Valuations for Tax and CGT Purposes

Australian tax provisions may require or depend upon market value. The correct valuation question must be tied to the relevant provision, asset and date. The ATO’s guidance identifies methodology, evidence, transparency, recorded assumptions and documentation as important to valuation credibility.

The ATO also states that, in the tax context, the onus for providing a replicable and defensible valuation remains with the taxpayer even when a professional is engaged. Taxpayers should obtain advice from their registered tax practitioner or tax lawyer about the applicable provision and use the valuer to determine value within properly defined instructions.

Business Valuations for Shareholder and Partnership Transactions

When an owner enters or exits, the parties may disagree about the asset, valuation date, control, marketability, debt, surplus assets or contractual rights. A clearly defined and transparent report can narrow the disagreement and give advisers a reasoned starting point.

Business Valuations for Succession Planning

Family, management and employee transitions can involve competing ideas of fairness. An independent valuation can identify the value already created and provide a credible foundation for discussing price, funding and ownership terms. It does not replace legal, tax and financial planning.

Business Valuations for Disputes and Litigation

Where proceedings are contemplated, the lawyer should help define the question and procedural context before the valuation begins. A general commercial report may not satisfy the requirements applying to expert evidence.

Business Valuations Before a Sale or Acquisition

A defensible valuation does not dictate the eventual transaction price. It helps an owner or buyer understand the earnings, risks, assets and assumptions underlying a negotiating position. Deal-specific synergies, finance, warranties, earn-outs and other terms may still affect price.

A Defensible Valuation Starts With a Defensible Scope

Many valuation problems begin before the analysis starts. The asset, purpose, date, intended users and required scope should be agreed at the engagement stage.

Clear instructions allow the valuer to request the right information, select an appropriate method and report at a level proportionate to the decision. They also help the client understand what the valuation will—and will not—answer.

IBV provides independent business valuations for Australian business owners, accountants, advisers and organisations. Each engagement begins by defining the valuation question and the evidence required to answer it.

Do you need a business valuation that can withstand informed scrutiny? Speak confidentially with IBV about the purpose, scope and report appropriate for your circumstances.

Editorial note: This article provides general information only. It does not constitute taxation, legal, financial or investment advice. Requirements depend on the applicable law, professional standard, transaction and circumstances. Obtain advice from appropriately qualified professionals before acting.

Sources and Further Reading

1. Australian Taxation Office, Market valuation of assets.
2. Australian Taxation Office, Market valuation for tax purposes.
3. Accounting Professional & Ethical Standards Board, APES 225 Valuation Services, revised October 2024; effective from 1 January 2025.
4. International Valuation Standards Council, International Valuation Standards—standards overview, including IVS 101, IVS 103, IVS 104, IVS 106 and IVS 200.