Summary. A working kit of damages instruments: a measures table with formulas by claim; a lost profits worksheet built around the fixed-versus-variable cost analysis that decides most commercial damages fights; document templates for discovery, expert engagement, demand, and settlement valuation; a motion-to-exclude outline and its opposition; jury instruction language and a verdict form; and the primary authorities.
SECTION A — MEASURES BY CLAIM
| Claim | Formula |
|---|---|
| Contract, generally (expectation) | Value of promised performance − costs saved + incidental + consequential − avoidable losses |
| Contract (reliance) | Out-of-pocket expenditures made in reliance, less losses the defendant proves would have occurred anyway |
| Contract (restitution) | Reasonable value of the benefit conferred on the defendant |
| UCC buyer — cover | (Cover price − contract price) × quantity + incidental + consequential − expenses saved (§ 2-712) |
| UCC buyer — no cover | (Market price at time of breach and place of tender − contract price) × quantity + incidental + consequential (§ 2-713) |
| UCC buyer — accepted nonconforming goods | Value as warranted − value as accepted, at time and place of acceptance (§ 2-714) |
| UCC seller — resale | Contract price − resale price + incidental − expenses saved (§ 2-706) |
| UCC seller — lost volume | Contract price − cost of performance (the lost profit, including reasonable overhead) (§ 2-708(2)) |
| Construction defect | Cost of repair, or diminution in value where repair is economically wasteful; less betterment |
| Employment (wrongful termination) | Back pay + front pay or reinstatement + benefits + statutory categories − mitigation earnings |
| Legal malpractice | Value of the underlying claim lost, × probability of success, × collectibility of the lost judgment |
| Fraud — out-of-pocket | Amount paid − value of what was received |
| Fraud — benefit of the bargain | Value as represented − value as received (available in some states only) |
| Conversion | Fair market value at the time and place of conversion + loss of use + consequential |
| Trade secret | Actual loss + unjust enrichment not captured by actual loss, or a reasonable royalty |
| Patent | Lost profits or reasonable royalty; enhanced up to treble for willfulness (35 U.S.C. § 284) |
| Copyright | Actual damages + infringer's profits, or statutory damages per work (17 U.S.C. § 504) |
| Trademark | Defendant's profits + plaintiff's damages + costs; trebling discretionary (15 U.S.C. § 1117) |
| Antitrust | Threefold the damages sustained + costs + reasonable attorney's fee (15 U.S.C. § 15) |
| Personal injury | Past + future medical, past + future lost earnings/capacity, past + future non-economic |
| Wrongful death | Pecuniary loss to survivors + loss of society; survival action adds the decedent's own pre-death damages |
| Nuisance/trespass | Permanent: diminution in value. Temporary: loss of use + discomfort + remediation |
| § 1983 | Compensatory for actual injury; nominal where a right is invaded without proved loss (Carey v. Piphus); not the abstract value of the right (Stachura) |
SECTION B — LOST PROFITS WORKSHEET
Step 1 — But-for revenue
| Input | Source | Value |
|---|---|---|
| Baseline volume per period | Historical order/production records, ___ periods | ______ |
| Number of periods lost | Contract term / recovery period | ______ |
| Unit price | Contract, or published index actuals | ______ |
| But-for revenue | volume × periods × price | ______ |
Step 2 — Avoided costs (the part that decides the case)
Classify every cost line. Only costs that actually stopped are subtracted.
| Cost line | Behavior | Avoided? | Evidence |
|---|---|---|---|
| Raw materials | Variable | Yes | GL / purchase records |
| Direct labor | Variable if actually reduced | Only if headcount fell | Payroll before/after |
| Freight out | Variable | Yes | Shipping invoices |
| Sales commissions | Variable | Yes | Commission statements |
| Utilities | Semi-variable | Partly — allocate by regression on volume | Utility bills + production volume |
| Maintenance | Semi-variable | Partly | Work orders |
| Rent / lease | Fixed | No | Lease + financial statements |
| Depreciation | Fixed | No | Fixed asset schedule |
| Management salaries | Fixed | No unless positions eliminated | Payroll |
| Insurance | Fixed | No | Policy + premium records |
| Total avoided costs | ______ |
The rule that moves the number most: a cost that continued unchanged after the breach was not saved and is not subtracted. Prove it with the before-and-after financial statements, not with an assumption.
Step 3 — Incremental profit = But-for revenue − avoided costs = ______
Step 4 — Mitigation credit = incremental profit on replacement business the plaintiff could not have taken but for the breach = ( ______ )
Step 5 — Alternative cause adjustment. Document how the model isolates the conduct at issue. If the model measures a specific contract, product line, or customer, most firm-wide events become irrelevant.
Step 6 — Present value. Discount future losses at a supported rate. Show the calculation at three rates.
Step 7 — Prejudgment interest on accrued components, per component accrual date.
TOTAL: ______
SECTION C — TEMPLATES
C-1. Itemization interrogatory (serve early)
INTERROGATORY NO. __: Separately state each category of damages you claim in this action. For each category, state (a) the total amount claimed; (b) the method of calculation, including each input, assumption, and formula used; (c) the time period to which it relates; (d) each document that supports it, identified by Bates number; and (e) each person with knowledge of the facts underlying it. If any category has not yet been calculated, state so expressly and identify the information you contend is necessary to calculate it.
C-2. Damages document requests (core set)
- Financial statements (audited, reviewed, or compiled) for [period].
- Federal and state income tax returns for [period], with all schedules.
- General ledger, trial balance, and chart of accounts for [period], in native electronic format.
- Sales data by customer, product, and period for [period], in native format with a data dictionary.
- All budgets, forecasts, projections, and business plans prepared during [period], and all documents identifying to whom each was provided.
- All submissions to lenders, investors, sureties, or insurers containing financial projections during [period].
- All documents relating to any customer, contract, or opportunity you contend was lost as a result of the conduct alleged.
- All documents relating to efforts to mitigate, including opportunities considered and declined, and the reasons.
- All documents relating to any other cause of a change in your revenues, profits, or operations during [period], including personnel departures, competitive entry, financing changes, regulatory action, supply disruption, and product problems.
- All insurance policies under which any part of the claimed loss may be covered, and all claims made under them.
- All communications with [third party] relating to [the subject].
- Documents sufficient to show your cost structure, including which costs vary with production or sales volume.
C-3. Expert engagement scope (letter language)
You are retained to render opinions on the following: (1) whether [Plaintiff] suffered economic loss as a result of the conduct described in the Complaint; and (2) the amount of that loss. Your engagement includes reviewing the documents produced in this action, requesting any additional data you require, and preparing a report complying with Federal Rule of Civil Procedure 26(a)(2)(B).
Please advise in writing, within fourteen days, of any data or documents you will need that have not been produced, so that we may seek them in discovery.
Your compensation is $____ per hour and is not contingent on the outcome. We will provide you with documents rather than narrative summaries. Please retain all materials you review. Draft reports and most communications with counsel are protected under Rule 26(b)(4), but the facts and data we provide you, any assumptions we ask you to adopt, and your compensation are discoverable.
C-4. Demand letter framework
- The claim — one paragraph, no adjectives.
- Liability — the two or three documents that establish it, quoted.
- Damages — the itemized schedule, with a total. Attach the supporting documents.
- Foreseeability — what your client communicated to the recipient, and when.
- Mitigation — what your client did to limit the loss.
- Fee and interest exposure — the statute or clause, and the running total.
- The demand — a number and a deadline.
- Where an insurer is involved — a clear statement that the demand is within policy limits and will remain open until [date].
C-5. Settlement valuation model
Expected value =
P(liability)
× P(damages evidence survives exclusion)
× E[award]
− expected fees and costs to verdict
− fee-shifting exposure × P(loss)
× time-value discount (years to verdict at discount rate r)
× collectibility factor
Run at three award levels:
HIGH = the expert model
MID = the model less the two most vulnerable components
LOW = the fallback measure (reliance / restitution / statutory)
Collectibility factor — assets, insurance limits, competing creditors, and the debtor's structure. On a judgment-proof defendant this term dominates every other input in the model.
SECTION D — MOTION PRACTICE
D-1. Motion to exclude a damages expert — outline
I. INTRODUCTION
The opinion measures the wrong thing, rests on unverified inputs,
and assumes the causation plaintiff must prove.
II. LEGAL STANDARD
Rule 702 as amended: proponent must show by a preponderance that the
opinion rests on sufficient facts, uses reliable methods, and
reliably applies them. Daubert; Kumho Tire (financial experts);
Joiner (analytical gap).
III. ARGUMENT
A. The model does not fit the claim.
- It measures harm from conduct not at issue / no longer in the case.
- Comcast v. Behrend.
B. The inputs are unverified client assertions.
- List each: source, page, absence of corroboration.
- Rule 703 does not permit reliance on this kind of material.
C. The expert assumed causation.
- No alternative cause is addressed.
- Identify each documented alternative cause the expert ignored.
D. The cost analysis is unsupported.
- Fixed costs treated as avoided / variable costs retained.
- Cite the financial statements that contradict the treatment.
E. The methodology was created for litigation.
- Never used by this expert or the field outside a lawsuit.
IV. THE EXCLUSION IS DISPOSITIVE
Without the opinion there is no evidence of amount, and the
damages element fails as a matter of law. [Cross-reference to the
concurrently filed motion for summary judgment.]
D-2. Opposition — outline
I. The challenge goes to weight, not admissibility.
II. The method is standard in the field and used outside litigation.
III. Every input is sourced. [Table: input | source | Bates number.]
IV. The model isolates the conduct at issue. [Explain the design choice
that makes firm-wide events irrelevant.]
V. Alternative causes are addressed at pp. __–__.
VI. Any residual uncertainty is the defendant's creation, and a
wrongdoer may not profit from it. Story Parchment; Bigelow.
VII. Alternatively, narrow the opinion rather than strike it, or permit
supplementation.
SECTION E — INSTRUCTIONS AND VERDICT FORM
E-1. Reasonable certainty
The plaintiff must prove that it was damaged by the defendant's conduct. The fact that the plaintiff suffered some damage must be proved with reasonable certainty. The exact amount need not be proved with mathematical precision. If you find that the plaintiff suffered damage, you may determine the amount from the evidence, using a just and reasonable estimate based on relevant data. Where the defendant's own conduct has made the amount difficult to determine, that difficulty does not prevent you from awarding damages.
E-2. Mitigation (burden on defendant)
A plaintiff may not recover damages that it could have avoided through reasonable effort. The defendant has the burden of proving both that the plaintiff failed to make reasonable efforts to avoid a loss and the amount by which the loss could have been reduced. The plaintiff is required to act reasonably, not perfectly, and is not required to take steps that would involve undue risk, expense, or humiliation. Reasonable expenses the plaintiff incurred in attempting to avoid loss are themselves recoverable.
E-3. Consequential damages (foreseeability)
In addition to direct losses, the plaintiff may recover losses that resulted from the breach if, at the time the parties made the contract, the defendant had reason to know that such losses would probably result from a breach. In deciding this, you may consider what the defendant knew about the plaintiff's business and circumstances and what the plaintiff communicated to the defendant.
E-4. Punitive damages — nonparty harm
In deciding the amount of punitive damages, you may consider whether the defendant's conduct posed a risk of harm to persons other than the plaintiff, because that may bear on how reprehensible the conduct was. However, you may not add to the award in order to punish the defendant for harm it may have caused to persons who are not parties to this case.
(Adapted from the limitation announced in Philip Morris USA v. Williams.)
E-5. Punitive damages — the guideposts
If you decide to award punitive damages, you should consider: (1) how reprehensible the defendant's conduct was, including whether the harm was physical rather than economic, whether the conduct showed indifference to the health or safety of others, whether the plaintiff was financially vulnerable, whether the conduct was repeated rather than isolated, and whether the harm resulted from intentional deceit rather than accident; (2) the relationship between the amount of punitive damages and the actual or potential harm suffered by the plaintiff; and (3) the civil penalties authorized or imposed in comparable cases.
(Tracking the guideposts of BMW of North America v. Gore and State Farm v. Campbell.)
E-6. Verdict form
QUESTION 1. Do you find for the plaintiff on the claim for breach of contract?
[ ] Yes [ ] No (If No, proceed to Question 4.)
QUESTION 2. What amount do you award for each of the following?
a. Direct damages $ __________
b. Incidental damages $ __________
c. Consequential damages $ __________
QUESTION 3. By what amount, if any, could the plaintiff reasonably have
avoided the losses above? $ __________
QUESTION 4. Do you find for the plaintiff on the claim for negligence?
[ ] Yes [ ] No (If No, proceed to Question 7.)
QUESTION 5. What amount do you award for:
a. Past medical expenses $ __________
b. Future medical expenses $ __________
c. Past lost earnings $ __________
d. Future lost earning capacity $ __________
e. Past pain, suffering, and loss of
enjoyment of life $ __________
f. Future pain, suffering, and loss
of enjoyment of life $ __________
QUESTION 6. Assign percentages of fault (total 100%):
Plaintiff ____% Defendant ____% Nonparty ____%
QUESTION 7. Do you find by clear and convincing evidence that the
defendant acted with [malice / fraud / oppression]?
[ ] Yes [ ] No
[If Yes, the court will conduct a separate proceeding on
the amount of punitive damages.]
SECTION F — PRIMARY AUTHORITY
- Story Parchment Co. v. Paterson Parchment Paper Co., 282 U.S. 555 (1931) — uncertainty in amount does not defeat recovery where the wrongdoer created it.
- Bigelow v. RKO Radio Pictures, Inc., 327 U.S. 251 (1946) — a jury may make a just and reasonable estimate from relevant data.
- Carey v. Piphus, 435 U.S. 247 (1978) and Memphis Community School District v. Stachura, 477 U.S. 299 (1986) — compensation for actual injury, not for the abstract value of a right.
- Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993) · General Electric Co. v. Joiner, 522 U.S. 136 (1997) · Kumho Tire Co. v. Carmichael, 526 U.S. 137 (1999).
- Comcast Corp. v. Behrend, 569 U.S. 27 (2013) — the damages model must be consistent with the liability theory.
- BMW of North America, Inc. v. Gore, 517 U.S. 559 (1996) · State Farm v. Campbell, 538 U.S. 408 (2003) · Philip Morris USA v. Williams, 549 U.S. 346 (2007) · Exxon Shipping Co. v. Baker, 554 U.S. 471 (2008).
- TransUnion LLC v. Ramirez, 594 U.S. 413 (2021) — concrete harm is required even where a statute is violated.
- FRE 702 · FRE 703 · FRCP 26 · FRCP 54 · 28 U.S.C. § 1920.
- Restatement (Second) of Contracts §§ 344–356; Restatement (Second) of Torts §§ 901–932; UCC §§ 2-706, 2-708, 2-712, 2-713, 2-714, 2-715.
Related documents
- Proving Damages in Civil Litigation
- Building a Damages Case: A Practical Guide from Pleading to Verdict
- Damages Proof and Expert Model Checklist
- Fee Shifting and Litigation Cost Recovery Toolkit
- Expert Witness Toolkit
- Contract Construction Toolkit
- Personal Injury Claim Toolkit
- Civil Rights Litigation Toolkit
This toolkit is educational and not legal advice. Damages formulas, caps, collateral source rules, punitive damages procedures, and interest computations vary substantially by jurisdiction. Adapt every template to local rules and confirm each measure against governing law before use.