When a contract is breached, a trade secret is taken, a distributor is terminated improperly, or a business is disrupted by someone else’s conduct, the injured party has to prove not just that harm occurred but how much. Courts require damages to be proven with reasonable certainty, and the evidence has to be more than an owner’s belief about what the business would have done.
This article covers the analytical framework, the accepted methods, and the places where damages claims most often fail.
General information on damages analysis, not legal advice. Damages law varies by jurisdiction and claim type; work with counsel.
The but-for framework
Every damages calculation rests on a comparison between two worlds:
- The actual world, what happened, which is observable in the records
- The but-for world, what would have happened absent the wrongful conduct, which must be constructed
Damages are the difference. The entire dispute is usually about the but-for world.
Constructing it requires the expert to isolate the effect of the defendant’s conduct from every other force acting on the business during the same period: a recession, a new competitor, a tariff change, the loss of a key employee for unrelated reasons, the plaintiff’s own operational problems. A plaintiff whose revenue fell during a period when the entire industry fell has a causation problem before they have a quantification problem.
The standard of proof
Reasonable certainty applies to the fact of damages, but courts generally allow more latitude on the amount, reasoning that a wrongdoer should not escape liability because their conduct made precise measurement impossible.
That latitude is not unlimited. Claims fail when the calculation rests on speculation about a business with no track record, on projections never used in the ordinary course, or on assumptions that cannot be tied to evidence.
New and unestablished businesses face the hardest path. Some jurisdictions historically barred lost profits for businesses with no operating history; most have moved toward allowing them where reliable evidence exists. Reliable evidence in that setting usually means comparable operations by the same management, industry benchmarks for similar ventures, pre-dispute business plans prepared for financing rather than for litigation, or actual results from a comparable location.
The accepted methods
Before-and-after
Compares the plaintiff’s performance before the wrongful conduct to performance after. Simple, intuitive, and strong where the business was stable and the conduct is the only significant intervening change.
Weak where the business was growing or declining independently, where the market shifted, or where the plaintiff also changed strategy during the period. Trend adjustment and industry normalization are usually necessary.
Yardstick
Compares the plaintiff to a benchmark: other locations of the same company unaffected by the conduct, comparable competitors, industry data, or the plaintiff’s own other product lines.
Strength depends entirely on the comparability of the yardstick. A defendant will attack any dissimilarity in market, size, management, or timing. The best yardstick is usually the plaintiff’s own unaffected operations.
Projections and business plans
Uses forecasts prepared in the ordinary course before the dispute. Contemporaneous forecasts prepared for lenders or a board carry far more weight than forecasts prepared for litigation. Their reliability is tested against the plaintiff’s historical accuracy in forecasting.
Market share
Estimates the share the plaintiff would have captured in the but-for world, applied to total market size. Common in antitrust and intellectual property matters. Requires credible market definition and sizing.
Cost-based and reliance measures
Where lost profits cannot be proven, recovery may be available for wasted expenditures made in reliance on the contract, or for the cost of remediation. This is often the fallback, and it is typically smaller.
Incremental profit, not revenue
The most common technical error in damages claims, and the easiest for a defendant to attack.
Damages are lost profits, meaning lost revenue less the costs that would have been incurred to earn that revenue. Those are incremental costs: the variable costs of the additional sales, plus any step-fixed costs that would have been triggered.
Fixed costs that the plaintiff incurred regardless of the lost sales are not deducted, because they did not change. Rent on a facility that was already leased, existing salaried staff, and existing insurance generally remain.
The line between fixed and variable is fact-specific and heavily contested. Determining it requires an actual cost behavior analysis of the plaintiff’s records, not a percentage pulled from a prior case. Regression analysis of cost behavior against volume is one defensible approach.
Capacity is a related test. If the plaintiff was operating at capacity, could the lost sales have been served at all without additional investment? If additional capacity would have been required, its cost belongs in the calculation.
The loss period
Damages run for the period during which the effect of the conduct persisted. Determining its length is often as consequential as the annual amount.
Considerations include the contract term and any renewal expectation, how long it would take a reasonable business to replace the lost relationship or rebuild, the useful life of the misappropriated asset in trade secret cases, and evidence of when the plaintiff’s performance returned to the but-for trend.
Claims asserting perpetual damages from a discrete event rarely survive.
Mitigation
The injured party generally must take reasonable steps to reduce the loss. Sales made to replacement customers, costs avoided, and assets redeployed all reduce damages. A defendant will look hard for failure to mitigate, and a plaintiff’s expert who ignores obvious mitigation evidence loses credibility on everything else.
Costs reasonably incurred in mitigating are typically recoverable.
Present value and prejudgment interest
Past losses are generally brought forward, and future losses are discounted to present value. The appropriate discount rate is contested: some argue for a risk-adjusted rate reflecting the uncertainty of the lost profits, others for a lower rate on the reasoning that the entitlement itself is now fixed. The choice should be reasoned and disclosed.
Prejudgment interest is a legal question with statutory rates in many jurisdictions. The expert typically presents the calculation on counsel’s instruction rather than opining on entitlement.
What survives cross-examination
- Causation addressed head-on. Not assumed. The report should show why other factors do not explain the loss.
- Contemporaneous documents. Forecasts, board packages, and correspondence created before the dispute.
- Cost behavior analysis from the plaintiff’s own records, not an assumed margin.
- Sensitivity analysis. Showing how the conclusion moves with key assumptions demonstrates transparency rather than weakness.
- Alternative calculations. Where two methods are available, agreement between them is powerful corroboration.
- Conservative assumptions where evidence is thin. An aggressive claim invites the trier of fact to discount everything.
- Clear separation of fact assumptions from expert opinion. Assumptions supplied by counsel should be identified as such.
FAQ
Can a startup with no revenue claim lost profits?
It is harder, and some jurisdictions are more restrictive, but claims can succeed where reliable evidence exists in the form of comparable operations, pre-dispute plans prepared for financing, or industry benchmarks.
Are lost profits the same as lost business value?
No. Lost profits measure income lost over a defined period. Lost business value measures the diminution in the value of the enterprise itself. Claiming both for the same harm can constitute double recovery and is a common target for challenge.
Who pays for the damages expert?
The retaining party. Experts should not be compensated contingent on outcome, and contingency arrangements can compromise admissibility.
When should the expert be engaged?
Early. Expert input on what evidence to seek in discovery frequently determines whether a claim can be quantified at all.
