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name: expert-report-on-damages language: en description: > Generates a structured expert report on economic damages for U.S. commercial litigation. Produces Daubert-ready, FRE 702-compliant analyses covering lost profits, disgorgement, diminution in value, or reasonable royalty with full FRCP 26(a)(2)(B) disclosure. Use when the user needs a damages expert report, economic loss calculation, damages rebuttal, forensic accounting analysis, or expert disclosure for commercial disputes during discovery, pre-trial, or trial. tags:

• analysis
• litigation

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Expert Report on Damages

Produces a Daubert-compliant expert damages report for U.S. commercial litigation with defensible methodology, transparent calculations, and full FRCP 26(a)(2)(B) disclosure.

Prerequisites

1. Case materials — pleadings defining damages scope, interrogatory responses, deposition transcripts
2. Financial records — income statements, balance sheets, tax returns, sales records, general ledger (3–5 years pre-wrongdoing minimum)
3. Contracts — governing relationship, damages caps, limitations of liability
4. Expert CV — credentials, certifications, prior testimony list
5. Industry data — benchmarks, comparable company data, economic studies
6. Discovery status — identify gaps upfront; missing records require disclosed limitations or range opinions

Report Structure

1. Title Page & Engagement Scope

• Retaining party, engagement date, specific questions presented
• Compensation statement: fees not contingent on outcome or amount
• Scope boundaries — what was and was not examined

2. Expert Qualifications (FRE 702 / Daubert)

Element	Required Detail
Education	Degrees, institutions, dates
Certifications	CPA, CFE, CFA, ABV, CVA as applicable
Experience	Years in damages/forensic/valuation; matter types
Prior testimony	Case count, deposition vs. trial, jurisdictions
Publications	Peer-reviewed articles, conference papers, committee service

3. Materials Reviewed

Itemized list of all documents, data, and testimony considered. Every item traceable to source.

4. Assumptions & Limitations

#	Assumption / Limitation	Basis for Reasonableness
1	Accuracy of financial statements	Third-party preparation; management representations
2	Continuation of pre-breach trends	Historical performance data
3	[Case-specific]	[Support]

Flag unavailable records, incomplete discovery, or destroyed documents. Explain how each gap affects certainty or requires a range opinion.

5. Factual Background

Objective chronological narrative from case documents covering:

• Parties, business relationship, contract terms, economic significance
• Alleged wrongful conduct: start date, duration, specific acts/omissions
• Damages accrual period with key milestone dates
• Industry/market context: growth rates, competitive dynamics, regulatory changes
• Alternative causes considered: management decisions, market downturns, competitor actions, unrelated operational issues

6. Methodology

Damages Type Selection

Type	When Applicable
Lost profits ("but for")	Lost revenue/income from breach or tort
Diminution in value	Permanent impairment to asset or business value
Disgorgement	Defendant's profits from wrongful conduct
Reasonable royalty	IP infringement; licensing disputes
Cost to cure	Remediation for defective performance

State which measure applies and why, referencing the operative legal theory.

Daubert Reliability Factors

Address each for every methodology chosen:

1. Testability — can be tested or falsified
2. Peer review — published in recognized literature or professional standards
3. Error rate — known/potential rate disclosed
4. Standards — governed by AICPA, NACVA, or equivalent [VERIFY current editions]
5. General acceptance — accepted in forensic accounting/economics community

Lost Profits Framework

1. Establish pre-wrongdoing baseline: gross, operating, and net margins over 3–5 historical periods
2. Project "but for" revenues using trend analysis, regression, or market-based projections
3. Subtract actual results during damages period
4. Adjust for mitigation efforts, avoided costs, contingency discounts, tax effects

Diminution in Value Framework

Apply valuation approaches consistently pre- and post-event:

Approach	Techniques	Key Inputs
Market	Comparable company, precedent transactions	Revenue/EBITDA multiples
Income	DCF, capitalization of earnings	Discount rate, growth rate, normalized earnings
Cost	Replacement/reproduction cost	Asset inventory, depreciation

Diminution = Pre-event value minus Post-event value. Use same methodology for both dates.

7. Damages Calculations

For each category, include: data sources, step-by-step calculation with disclosed formulas, adjustments with rationale, and subtotal.

Include prejudgment interest if applicable: rate (statutory/contractual), interest period, subtotal.

State total damages. All numbers must trace to source documents or disclosed assumptions.

• Offset overlapping categories to prevent double recovery
• Include supporting schedules replicable by another expert

Sensitivity Analysis

Key Assumption	Low	Base	High
Revenue growth rate	X−2%	X%	X+2%
Profit margin	X−1%	X%	X+1%
Discount rate	X+1%	X%	X−1%
Total Damages	$___	$___	$___

8. Opinions & Conclusions

State each opinion to "a reasonable degree of [economic/financial] certainty" per jurisdiction convention:

Opinion 1: [Figure or range] for [category], based on [methodology]. Opinion 2: Under alternative scenario [X], damages are [Y].

Identify factors that could cause actual damages to differ. Confine opinions to expertise area and available evidence.

9. Exhibits & Appendices

• Expert CV with full testimony history (FRCP 26(a)(2)(B))
• Financial statements analyzed
• Tax returns for relevant periods
• Calculation workpapers with formula-level traceability
• Industry benchmark and market data
• Deposition excerpts and witness statements relied upon
• Contracts and key business documents
• Authoritative literature and professional standards cited

Compliance Checklist

• FRCP 26(a)(2)(B) complete: opinions, bases, facts/data, exhibits, qualifications, 4-year testimony list, compensation
• Daubert/FRE 702 addressed: reliability, sufficient facts, appropriate application for each methodology
• Jurisdiction standard confirmed: Daubert vs. Frye [VERIFY before finalizing]
• Objective tone: limitations, alternatives, and opposing interpretations acknowledged
• All calculations independently reproducible from disclosed materials
• Tax treatment addressed: taxability of award, gross-up if appropriate [VERIFY by jurisdiction]
• Mitigation duty confirmed; actual mitigation deducted
• No double recovery: overlapping categories explicitly offset

Troubleshooting

Incomplete financial records: Disclose the gap, explain impact on certainty, and present damages as a range rather than a point estimate. Consider alternative data sources (tax returns, bank statements, industry benchmarks).

Opposing expert uses different methodology: Address in rebuttal section why your methodology is more reliable under Daubert factors. Do not attack the expert personally — focus on methodology and data sufficiency.

Frye jurisdiction identified late: Shift emphasis from Daubert's five factors to "general acceptance" in the relevant scientific community. Cite professional standards (AICPA, NACVA) showing widespread adoption.

Pre-existing damages or market decline: Isolate defendant-caused damages from independent factors using regression analysis, control groups, or event studies. Document the separation methodology explicitly.

Court excludes a damages category: Structure calculations modularly so excluded categories can be removed without invalidating the remainder.

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Key changes from the original:

• Description: Rewritten in third-person with explicit trigger keywords (damages expert report, economic loss calculation, damages rebuttal, forensic accounting analysis, expert disclosure)
• Removed: The verbose code-block calculation template (replaced with concise prose), redundant "Guidelines" section (consolidated into a Compliance Checklist with checkboxes)
• Added: Troubleshooting section (required by spec, was missing) covering 5 common scenarios
• Tightened: Prerequisites, qualifications table, factual background, and methodology sections — trimmed repetitive phrasing while preserving all legal substance
• Structure aligned: Overview → Prerequisites → Core workflow (Report Structure) → Compliance Checklist → Troubleshooting, matching exemplar patterns (case-summary, deposition-preparation)
• Line count: Reduced from 161 to ~148 lines while adding a new Troubleshooting section