Preparing Financial Evidence for a Damages Expert: A Practical Guide for Legal Teams

Preparing financial evidence for a damages expert can involve gathering and organising a substantial amount of financial and factual material. The information required will depend on the nature of the dispute, the period of loss being considered and the questions within the scope of the expert's instruction.

For solicitors and other legal professionals, presenting financial evidence in a clear and organised way may help a damages expert understand the financial issues and identify areas where further information or clarification may be required.

This guide looks at the types of financial evidence that may be relevant and some practical points for legal teams to consider when preparing material for a damages or quantum expert.

What Is Financial Evidence in a Damages Claim?

Financial evidence can include records that help explain a claimant's or defendant's financial position, income, expenditure, business performance or other monetary matters relevant to the dispute.

The appropriate evidence will vary between cases. A personal injury claim may involve employment and earnings information, while a commercial dispute may involve accounting records, sales data, budgets and financial forecasts.

The objective is not necessarily to provide every financial document available. The relevant material will depend on the issues the expert has been asked to consider and the information needed for the particular assessment.

For an overview of the types of work covered, visit the damages expert witness services available through Damages Expert Witness.

What Information May a Damages Expert Need?

Historical Financial Records

Depending on the circumstances, relevant historical records may include:

• Annual accounts
• Management accounts
• Profit and loss statements
• Balance sheets
• General ledgers
• Bank statements
• Tax records
• Payroll records
• Invoices and receipts
• Sales records
• Business expenditure records

Historical information may help an expert examine financial performance before and after an event or during a relevant period.

The appropriate comparison period will depend on the facts of the case and the financial issues being considered.

Employment and Earnings Information

Where a claim involves an individual's financial loss, potentially relevant documents may include:

• Payslips
• Employment contracts
• P60s and P11Ds where applicable
• Self-assessment records
• Bonus or commission information
• Records of overtime
• Evidence concerning previous earnings
• Employment history
• Information concerning changes in working arrangements

The expert may also need factual information concerning employment, career progression and other circumstances that are relevant to the financial assessment.

Business Records

Commercial damages claims may require more detailed business information, such as:

• Financial statements
• Management accounts
• Sales data
• Customer records
• Product or service information
• Pricing information
• Budgets
• Internal forecasts
• Business plans
• Cost information
• Details of significant contracts
• Relevant correspondence concerning financial performance

The documents required will depend on the nature of the alleged loss and the approach the expert considers appropriate.

How to Organise Financial Evidence

Providing documents in a logical structure may make it easier to identify what information has been supplied and whether further material may be required.

Separate Different Categories of Evidence

Where practical, financial documents can be grouped into categories such as:

1. Historical financial records
2. Current financial records
3. Employment and earnings information
4. Forecasts and budgets
5. Business records
6. Supporting factual evidence
7. Relevant correspondence

The structure should reflect the requirements of the individual case rather than follow a fixed format.

Identify the Relevant Periods

It can be useful to identify the dates covered by each set of financial records.

For example, a legal team may distinguish between:

• The period before the relevant event
• The period immediately following the event
• The period during which loss is alleged to have occurred
• The period for which future loss is being considered

Clear identification of dates may help the expert understand the relationship between the financial records and the period under consideration.

Keep the Source of Information Clear

Where financial figures have been extracted or summarised, it can be helpful to retain information showing where those figures came from.

For example, a summary of turnover may be supported by underlying accounting records from which the figures were obtained.

This can help distinguish an original accounting figure from a management estimate, forecast or calculation prepared specifically for the dispute.

Forecasts, Budgets and Projections

Some damages assessments may require consideration of what might have happened if a particular event had not occurred.

Financial forecasts, budgets and business plans may therefore be relevant, particularly in commercial damages disputes.

A forecast is different from a historical financial result because it represents an expectation or projection made at a particular point in time. It may depend on assumptions concerning future trading conditions, revenue, costs or other factors.

Information That May Help Explain a Forecast

Depending on the circumstances, an expert may need information about:

• When the forecast was prepared
• Who prepared it
• The purpose for which it was prepared
• The assumptions used
• Previous versions of the forecast
• Actual results available when it was prepared
• Subsequent actual performance
• Changes in the underlying business circumstances

This material may provide context for the expert's consideration of the forecast and its relevance to the financial issues being examined.

Dealing With Missing Financial Records

Financial evidence is not always complete. Records may be unavailable, lost, destroyed or never created. There may also be periods for which only partial information exists.

Where an important record is unavailable, it may be useful to identify the gap and explain what is known about it.

Identify Known Limitations

Where relevant, the legal team can identify:

• Which records are unavailable
• The period affected
• Why the records are unavailable, where known
• Whether alternative records exist
• Whether estimates have previously been prepared

This does not resolve the evidential issue by itself. It may, however, give the expert a clearer understanding of the material available for the assessment.

Distinguish Estimates From Historical Records

Where an amount has been estimated rather than taken directly from an underlying record, that distinction should remain clear.

An estimate prepared for the purposes of a claim is different from an amount appearing in an original accounting record.

Clear labelling may help the expert distinguish source evidence from assumptions, estimates and subsequent calculations.

Explaining Significant Changes in Financial Data

Material changes in revenue, costs, earnings or profitability may require factual context.

Depending on the case, changes may relate to matters such as:

• Expansion or contraction
• Loss or acquisition of customers
• Changes in pricing
• Changes in staffing
• New contracts
• Changes in operating costs
• Market conditions
• Other significant business events

Where the legal team has relevant factual evidence explaining a material change, that information can be included with the financial material provided to the expert.

The expert can then consider how the available evidence relates to the financial analysis within the scope of the instruction.

Keeping Evidence and Assumptions Distinct

A damages calculation may involve assumptions about matters such as:

• Expected revenue
• Future costs
• Expected earnings
• Customer retention
• Business growth
• Career progression
• Duration of loss

These matters may not all be established by historical financial records.

It can therefore be helpful to distinguish documentary evidence from assumptions and estimates. This allows the expert to identify the basis on which different figures or scenarios are being considered.

Preparing a Financial Chronology

A financial chronology may help provide context where the financial position changed over time.

Depending on the case, it may include events such as:

• Commencement of employment
• Business expansion
• Major contracts
• Relevant incidents
• Changes in working arrangements
• Changes in turnover
• Periods of absence
• Changes in staffing
• Termination of contracts

A chronology does not replace the underlying evidence. It can instead help connect relevant financial records with the factual events to which they relate.

What Can the Legal Team Explain to the Damages Expert?

The instruction should make clear the financial questions the expert is being asked to consider and provide sufficient factual and procedural context for those questions.

The Nature of the Dispute

The expert may need relevant background information to understand why particular financial evidence is being considered.

The Relevant Period

The dates or periods under consideration can be identified, subject to any issues that remain disputed.

The Issues Requiring Expert Analysis

The financial questions for the expert can be distinguished from matters outside the expert's area of expertise or scope of instruction.

Areas of Uncertainty

Where important evidence is incomplete, disputed or subject to different factual accounts, identifying those issues may help the expert understand the limitations of the material provided.

A Practical Financial Evidence Checklist

Before providing material to a damages expert, a legal team may wish to consider whether it has identified the following:

• Relevant historical financial records
• Relevant current financial records
• Employment and earnings information, where applicable
• Business records, where applicable
• Budgets and forecasts
• Information supporting significant financial changes
• Relevant tax and payroll information
• Underlying documents supporting important figures
• Details of missing or unavailable records
• Identification of estimates and assumptions
• Relevant factual chronology
• Clear identification of the questions for the expert

This checklist is not exhaustive. The appropriate evidence will depend on the particular dispute and the scope of the damages expert's instruction.

Reviewing the Evidence Before the Expert Starts

A final review may help identify obvious gaps or inconsistencies before the material is provided.

The legal team may wish to consider whether:

• The financial records cover the relevant periods
• Figures in different documents appear consistent
• Important assumptions have been identified
• Forecasts can be distinguished from actual results
• Missing documents have been identified
• Relevant supporting records have been included
• The expert's questions are clearly defined

This review does not replace the expert's independent analysis. It is intended to help ensure that the expert receives a sufficiently coherent set of relevant materials from which to begin the financial assessment.

Conclusion

Preparing financial evidence for a damages expert involves more than collecting accounting documents. Depending on the case, the relevant material may include financial records, employment information, business data, forecasts, factual explanations and documents supporting particular figures or assumptions.

A structured approach may help distinguish historical evidence from estimates, identify missing information and provide the expert with appropriate context for the financial questions within the scope of the instruction.

The exact evidence required will depend on the nature of the dispute, the issues in question and the expert's instructions. Legal teams should therefore consider the specific requirements and circumstances of the individual case when preparing material for a damages or quantum assessment.

If you need to provide details about a matter for consideration, you can use the Damages Expert Witness contact page.

Disclaimer: This article provides general information about preparing financial evidence for a damages expert and is not legal, accounting or expert-witness advice. The appropriate evidence and approach will depend on the facts and issues of the individual case.

Last Reviewed: September 2026