Trademark and copyright infringement damages are calculated by quantifying one of three financial measures — the rights holder’s own lost profits, the profits the infringer earned from the wrongful use, or a reasonable royalty for the unauthorized use — and copyright owners additionally may elect statutory damages set by the court within a per-work range, choosing whichever measure the evidence supports and the law permits.
As a CPA, Accredited in Business Valuation (ABV), and forensic accountant who works as an economic-damages expert witness in Florida, I am brought into infringement cases to put a defensible number on financial harm — not to opine on whether a mark or a work was actually infringed. That distinction matters, so I will state it plainly here and stay inside it throughout: questions of validity, infringement, willfulness, and liability belong to counsel and the court. My job begins once those questions are framed. This article walks through how the dollars are built in both regimes, where trademark and copyright methodology overlaps, and where the two diverge in ways that change the analysis.
The Two Regimes at a High Level
Trademark damages live primarily under the federal Lanham Act, which lets a mark owner recover its own actual losses, the infringer’s profits, and the costs of the litigation, subject to the court’s discretion. Copyright damages live under the Copyright Act, which gives the owner a choice between proving actual damages plus the infringer’s added profits, or electing a statutory award within a defined range before judgment is entered.
Despite different statutes, the financial spine is the same in both. Almost every infringement damages analysis reduces to some combination of three building blocks:
- The owner’s lost profits — the margin the owner would have earned but for the infringement.
- The infringer’s gain — the profit the wrongdoer pocketed from using the mark or work, recovered to strip away ill-gotten benefit. This overlaps directly with the disgorgement of profits measure used across unjust-enrichment claims.
- A reasonable royalty — what a willing licensor and a willing licensee would have agreed to in a hypothetical license, used when neither lost profits nor disgorgement fits the facts cleanly.
The art of the engagement is choosing the right measure (or measures) for the facts, and — critically — never letting the same dollar of harm be counted twice across them. That anti-double-counting discipline is the through-line of this entire field, and it is the same rigor I apply in trade secret damages and other economic-damages work.
How a Brand Actually Creates Value (and Why It Drives the Method)
Before you can quantify what infringement took, you have to understand how the asset earned money in the first place. A trademark generates cash for its owner in a handful of distinct ways, and the way it earns dictates how you measure the loss.
- Volume-driven recognition. A strong mark functions as efficient advertising. Consumers see it and immediately know what they are getting, which pulls in sales that a no-name competitor would never capture. Harm here shows up as diverted unit sales.
- Premium pricing power. Some marks let the owner charge more for an otherwise comparable product because buyers associate the brand with quality. Harm here can show up as lost margin and as price erosion if confusion forces the owner to discount.
- Cost-of-substitution value. Many marks are not yet famous enough to pull customers or command a premium. Their worth is closer to what it would cost a buyer to build an equivalent name from scratch — a cost-savings figure rather than an ongoing cash-flow figure.
I spend time up front determining which of these describes the mark in front of me, because a mark that drives volume points toward lost profits, a mark that commands a premium points toward price erosion, and a mark whose value is mostly substitution cost points toward a royalty or a disgorgement framing. Skipping this step is how experts attach the wrong method to the facts.
Trademark Damages: The Owner’s Actual Losses
The first measure is the owner’s own lost profits. This is the cleanest theory, but it only fits when the parties actually compete and the infringement plausibly diverted business. If the wrongdoer’s use never realistically pulled a customer away — say the mark appeared in a context no buyer would act on — lost profits is the wrong tool and a royalty or disgorgement is the better fit.
When lost profits do apply, the mechanics mirror any other commercial lost-profits analysis. I determine the revenue the owner would have earned in a but-for world without the infringement, then subtract the incremental costs the owner would have incurred to produce that revenue. The result is lost margin, not lost revenue — a distinction that separates a credible analysis from an inflated one. I assess intervening market factors that have nothing to do with the defendant, and I bring the figures to present value relative to trial. The methodology tracks my broader lost-profits framework for commercial litigation.
The wrinkle unique to trademarks is causation. A mark works by influencing buyer behavior, and behavior is hard to trace cleanly. In a typical lost-profits case — a fire, a breached supply contract, a wrongly called loan — the cause and the lost sale both sit inside the plaintiff’s own records, and a before-and-after comparison does most of the work. In a trademark case, the lost sale often went somewhere, and figuring out where requires pulling the analysis into the infringer’s books. That is why trademark lost-profits figures frequently come out as a defensible range rather than a single point, and why holding the analysis to the reasonable-certainty standard takes extra care.
Corrective Advertising
When confusion damages the brand itself, the owner may need to spend money to repair the consumer perception the infringement muddied. The cost of that corrective advertising — the campaign needed to rebuild what was confused away — can itself be a component of actual damages. I quantify what a reasonable repair effort costs; whether the law allows it in a given case is counsel’s question.
Trademark Damages: Disgorging the Infringer’s Profits
The second trademark measure flips the lens from the owner’s loss to the infringer’s gain. Here the goal is to take away the profit the wrongdoer earned from using the mark, so that infringement does not pay. This is where the Lanham Act builds in a burden split that drives the entire calculation, and it is the single most important mechanical feature of trademark damages to understand.
The owner only has to prove the infringer’s sales. Once that is established, the burden shifts to the infringer to prove two things:
- the costs that should be deducted from those sales to arrive at profit, and
- the portion of the profit that is not attributable to the infringing mark — the share driven by the infringer’s own product quality, distribution, sales force, pricing, or other contributions.
This split is enormously consequential. It means a credible disgorgement analysis can begin with nothing more than the defendant’s revenue figures, and any gap in the defendant’s cost or apportionment proof works against the defendant, not the owner. My role on the owner’s side is to isolate the infringing revenue — the “accused sales” — from total revenue, then build a defensible profit figure. On the defense side, my role is exactly the mirror: to identify the legitimate costs that reduce the profit base and to quantify how much of the profit the brand had nothing to do with.
Finding the Accused Sales
Isolating infringing sales is genuinely hard, because companies track revenue by customer, product, location, and date — almost never by the advertising medium that produced the sale. Since a trademark functions as advertising, the data rarely lines up with the wrong. The practical solution is to sort the defendant’s revenue into evidence-based “buckets,” each tied to a degree of confidence that the sale flowed from the infringing use. Where a website wrongly carried a competitor’s mark, for example, I might separate web revenue tied to searches for the protected mark, then account for buyers who found the site online but bought in a store, and so on — building each bucket on the best available evidence and often leaning on a survey expert’s likelihood-of-confusion data to set the percentages. The number of buckets generally matches the number of distinct infringement claims, so that whatever the fact-finder decides on liability, a clean damages figure remains.
Trademark Damages: A Reasonable Royalty
The third measure asks what the parties would have agreed to in a hypothetical license negotiation — a willing licensor and a willing licensee, each standing in the parties’ shoes, bargaining at the time the infringement began. A royalty fits best when the companies do not directly compete, so the mark likely confused some consumers without actually diverting a sale.
The strength of the royalty approach is precision. A well-built royalty isolates the value of the mark itself from everything else that helped close the sale — the distribution network, the complementary products, the company’s general reputation. For a complex firm whose brand is only one of several intangibles driving revenue, that isolation can produce a cleaner measure of the harm the infringement specifically caused than a broad profit figure would. I anchor the rate in what the owner has charged to license the mark before, or what comparable marks command in the same market, rather than reverse-engineering a number to fit the verdict I want.
A word on enhancement and attorney fees: the Lanham Act allows courts to enhance an award and, in exceptional cases, to shift fees. Those are legal determinations for the court — not figures I compute as an accountant — and I keep them outside my damages number.
Copyright Damages: Actual Damages Plus the Infringer’s Added Profits
Copyright’s first path lets the owner recover actual damages plus any additional profits of the infringer not already captured in the actual-damages figure. The “not already captured” language is the anti-double-counting rule written directly into the statute, and respecting it is the central discipline of a copyright calculation.
Copyrights tend to earn value in one of two ways, and the two lead to very different analyses:
- Works sold or licensed to others — house plans, films, songs, software, published material. Because the owner makes money by selling copies or licenses, an infringer’s unauthorized copies can directly displace those sales. This is the scenario where lost profits genuinely fit.
- Works the owner uses internally — a proprietary process design that cuts the owner’s own costs. Here the owner usually loses no sales at all, so lost profits are near zero and the analysis moves to disgorgement or a royalty.
When lost profits apply, the build mirrors the trademark and general commercial approach: revenue the owner would have earned but for the infringement, less incremental cost, equals lost margin. A tempting shortcut — treating each infringing sale as a one-for-one lost sale for the owner — usually overstates the harm. If the infringing copies sold far cheaper than the original, some of those buyers would never have paid the owner’s price at all; assuming otherwise treats demand as perfectly inelastic, which it almost never is. So I test the substitution assumption rather than swallow it.
Apportioning the Infringer’s Profit
The disgorgement side of copyright carries the same apportionment requirement that runs through trademark and trade-secret work: the recoverable profit is only the share attributable to the copyrighted work, not the defendant’s entire margin. A builder who used a stolen house plan still earned most of his profit from land, labor, materials, and construction skill — the design was a small slice. A film that incorporated infringing material still earned most of its return from the cast, the marketing, and the studio’s distribution. The honest question is always: how much of this profit actually flows from the protected work, and how much from everything the defendant brought to the table? Answering it is where forensic discipline earns its keep.
Copyright Damages: Statutory Damages
Copyright offers something trademark does not — the option to elect statutory damages instead of proving actual damages and profits. The owner may make this election any time before final judgment. Statutory damages are set by the court within a per-work range: a standard range that the court can push higher when the infringement is found willful and lower when the infringer proves it acted innocently. (Eligibility generally turns on timely registration — a legal prerequisite for counsel, not an accounting input.)
Why would an owner give up a proven actual-damages number for a court-set figure? Usually for one of these reasons:
- The actual harm is small or hard to prove. When lost profits and disgorgement would net little — or when the evidence to build them is thin — a statutory award per work can exceed what the economic proof would support.
- Many works were infringed. Statutory damages accrue per work infringed, so a defendant who copied a large catalog can face a sum that dwarfs the modest profit on any single piece.
- Willfulness is in play. Where the conduct supports a willful finding, the higher end of the statutory range becomes a powerful lever.
Conversely, an owner with strong proof of large actual damages or substantial infringer profits will usually skip statutory damages, because the calculated number is bigger. The election is a strategic decision counsel makes; my contribution is to quantify the actual-damages-and-profits path cleanly so the choice can be made on real numbers. The role I play in framing all of this is part of my broader expert witness and litigation support practice.
A Labeled Hypothetical: Disgorgement With Cost Deduction and Apportionment
The figures below are hypothetical and invented to illustrate the mechanics. They are not drawn from any actual case or client engagement.
Suppose an infringer used a protected mark on a product line and the books show the following. The owner’s burden is to establish the infringing sales; the infringer’s burden is to prove its deductible costs and the share of profit unrelated to the mark.
| Step | Description | Amount |
|---|---|---|
| 1 | Accused (infringing) sales — owner’s burden | $4,000,000 |
| 2 | Less: cost of goods sold — infringer’s burden | ($2,300,000) |
| 3 | Less: directly attributable selling costs — infringer’s burden | ($500,000) |
| 4 | Profit base before apportionment | $1,200,000 |
| 5 | Share of profit attributable to the mark (40%) — apportionment | 40% |
| 6 | Disgorgeable profit attributable to infringement | $480,000 |
The discipline lives in Steps 2 through 5. If the infringer fails to prove its costs, the profit base stays high. If it fails to prove apportionment, the full $1,200,000 is exposed rather than $480,000. And if the owner separately claimed its own lost profits on the same diverted sales, those overlapping units would have to be removed from one measure or the other — never recovered twice. That is the anti-double-counting rule in action.
To complete the picture, contrast a royalty framing on the same facts: if a comparable license for this kind of mark ran, say, 6% of sales, the royalty measure would yield roughly $240,000 on the $4,000,000 of accused sales — a different number reflecting a different theory of the harm, and one you would never simply add on top of the disgorgement figure.
Where Trademark and Copyright Diverge — and Where They Don’t
Pulling the threads together:
- Shared rigor. Both regimes use lost profits, disgorgement of the infringer’s gain, and a reasonable royalty. Both demand apportionment — separating the value of the protected asset from everything else that drove the revenue. Both forbid double-counting the same economic harm across measures.
- The trademark-specific feature is the Lanham Act burden split: the owner proves sales, the infringer proves costs and the non-attributable share. That single rule shapes how every trademark disgorgement number gets built.
- The copyright-specific feature is the statutory-damages election: a court-set, per-work alternative the owner can choose before judgment, with the range moving up for willful conduct and down for innocent conduct — a lever with no trademark equivalent.
These same disgorgement and apportionment principles appear across the intellectual-property damages family, including patent infringement damages and trade secret damages, which sit alongside trademark and copyright as the sibling IP measures. Where the owner also had a duty to limit its harm, the mitigation analysis folds in as well. And underlying every one of these measures is the same causation question — whether the financial loss actually flows from the wrong — which I address through a disciplined causation analysis.
FAQ
What is the difference between trademark and copyright damages?
Both let a rights holder recover its own lost profits, the infringer’s profits, or a reasonable royalty. The two principal differences are mechanical: trademark law under the Lanham Act splits the burden of proof in a disgorgement claim — the owner proves the infringer’s sales and the infringer must prove its deductible costs and the share of profit unrelated to the mark — while copyright law uniquely allows the owner to elect statutory damages set by the court within a per-work range instead of proving actual damages and profits.
How is disgorgement of an infringer’s profits calculated?
Start with the infringing (accused) sales, subtract the costs properly attributable to producing those sales to reach a profit base, then apportion — keeping only the share of that profit driven by the protected mark or work rather than by the defendant’s own product, pricing, distribution, or reputation. Under the Lanham Act, the owner only has to establish the sales figure; proving the deductions and the non-attributable portion falls to the infringer.
When would a plaintiff choose statutory damages over actual damages in a copyright case?
When the calculated actual harm is small or hard to prove, when many separate works were infringed so a per-work award compounds, or when the conduct supports a willful finding that pushes toward the high end of the statutory range. An owner with strong proof of large actual losses or substantial infringer profits usually skips statutory damages because the calculated figure is bigger.
What is apportionment, and why does it matter so much?
Apportionment separates the profit or loss caused by the infringement from everything else that contributed to the revenue. A builder who used a stolen design still earned most of his profit from land, labor, and materials; only a small slice traces to the design. Failing to apportion is the most common way infringement damages get overstated, and it is the discipline that holds an analysis together across trademark, copyright, patent, and trade-secret matters.
Can a plaintiff recover both lost profits and the infringer’s profits?
Sometimes — but never on the same dollars of harm. If certain sales would have gone to the owner, those are lost profits; if other sales would have gone to the infringer regardless, the owner may reach those through disgorgement; and for any sales that overlap, the owner recovers under one measure or the other, not both. Eliminating that overlap is the anti-double-counting rule built into both statutes.
How do I reach you about an infringement damages matter?
I work with counsel on the financial-damages side of trademark and copyright disputes — quantifying lost profits, the infringer’s gain, and reasonable royalties to a defensible standard, while liability and legal questions stay with the attorneys and the court. This work is typically billed hourly, at approximately $400 per hour, the Florida market average. You can reach me at 954-282-9615 to discuss whether a damages analysis fits your case.
About the Author
Joey Friedman is a CPA, Accredited in Business Valuation (ABV), and forensic accountant who holds a Master of Accounting and a Master of International Business and is a member of the AICPA and the Association of Certified Fraud Examiners. He also holds a Florida real estate license. Beyond those credentials, he has personally owned and operated more than a dozen of his own businesses across industries including marketing, printing, transportation, restaurants, hospitality and entertainment, and event planning — so he measures the financial harm from infringement with both a forensic accountant’s rigor and an owner-operator’s first-hand understanding of how a brand, a name, and accumulated goodwill actually drive sales.