The True Cost of Patent Infringement Litigation: Enforcement and Defense in a Complex Market

Patent infringement litigation is often discussed in terms of high-profile disputes or headline verdicts. What receives less attention is the cost of getting there. Whether a company is enforcing its patent rights or defending against a claim, the financial impact of patent litigation can be significant long before a case ever reaches trial.

For many businesses, particularly those operating in technology-driven industries, patent litigation is no longer just a legal issue. It is a business consideration that can influence strategy, resource allocation and long-term planning.

Where the Costs Come From

The cost of patent litigation is driven by a combination of legal, technical, and procedural factors that apply to both enforcement and defense. Patent cases typically require specialized legal counsel with both litigation experience and technical knowledge. These professionals often command higher hourly rates due to the complexity of the subject matter. In addition, expert witnesses are frequently retained to analyze infringement, validity, and damages, adding another layer of expense.

Discovery is widely recognized as one of the most resource-intensive phases of litigation. Parties are required to produce and review large volumes of documents, including technical specifications, source code, internal communications, and financial records. This process often requires significant internal involvement from engineers, product managers, and executives, diverting attention from day-to-day operations.

Modern patent disputes also involve increasingly complex technologies. Software systems, artificial intelligence models, and integrated platforms require detailed analysis of how products function at a granular level. This complexity extends timelines and increases reliance on specialized expertise, further contributing to overall costs.

Post-grant proceedings, such as Inter Partes Review before the Patent Trial and Appeal Board, have added another dimension. These proceedings are often used alongside district court litigation, increasing both cost and strategic complexity.

The Cost of Enforcement

For patent owners, enforcing intellectual property rights requires a careful evaluation of both legal merit and financial feasibility. Data from the American Intellectual Property Law Association’s (AIPLA) 2025 Report of the Economic Survey illustrates how quickly costs can escalate. Even mid-range disputes involving between $1 million and $10 million at risk had a median reported cost of $600,000 through discovery, motions, and claim construction and $1 million through trial, post-trial proceedings, and appeal when applicable. For disputes involving $10 million to $25 million at risk, the corresponding median costs were $1.5 million and $3 million.

These costs force patent holders to make strategic decisions. A strong case on the merits does not always translate into a viable enforcement action if the expected recovery does not justify the expense. Smaller companies, in particular, may find themselves weighing whether to pursue enforcement or accept less favorable licensing terms.

This creates an imbalance in some markets. Organizations with greater financial resources may be more willing to test boundaries, while smaller patent holders may be limited in their ability to assert their rights.

Sioux Steel and the Cost of Enforcement

In Sioux Steel Company v. Prairie Land Millwright Services, Inc. and Duane Chaon, No. 1:16-cv-02212 (N.D. Ill.), Sioux Steel filed suit in 2016 to enforce a grain bin sweep patent. The dispute also required it to defend that patent in an inter partes review. Over six years later, after an eight-day trial, a jury awarded $11.4 million in lost profits and an additional reasonable royalty. The court further granted an injunction which preserved Sioux Steel’s exclusivity in the marketplace for its invention. Finally, in 2024 Prairie Land paid Sioux Steel $13.8 million including interests and costs.

Sioux Steel had obtained IP enforcement insurance before the infringement began, and its policy supported covered expenses in both proceedings, subject to its terms. A favorable judgment was achieved in part because the plaintiff had the supporting resources to fully adjudicate its rights.

The Cost of Defense

On the other side of the equation, defending a patent infringement claim presents its own set of challenges.

Costs begin during the initial case assessment, where companies must engage counsel, analyze the asserted patent, respond to the complaint, and evaluate potential exposure. This early phase can require coordination across legal and technical teams, often before a clear litigation strategy has been established.

As the case progresses, expenses continue to build through motion practice, discovery, and expert analysis. According to the (AIPLA) 2025 Report of the Economic Survey, cases involving $10 million to $25 million dollars at risk can result in several million dollars in total litigation costs through trial.

Importantly, defense costs are incurred regardless of outcome. A company may successfully defend against a claim and still face a substantial legal spend that cannot be recovered. This reality can influence settlement decisions and broader business strategy.

There is also an operational impact. Litigation can delay product launches, disrupt partnerships, and require significant management attention. Public disputes may also affect how customers and investors perceive a company, independent of the merits of the case.

Octane Fitness and the Cost of Defense

In ICON Health & Fitness, Inc. v. Octane Fitness, LLC, 2011 WL 2457914 (D. Minn. June 17, 2011), Octane was accused of infringing a much larger competitor’s patent on elliptical exercise machines. Octane obtained summary judgment of noninfringement, and sought its fees. The case eventually reached the U.S. Supreme Court. After the Court unanimously changed interpretation of the 35 U.S.C. § 285 standard, Octane eventually secured more than $1.6 million in attorney fees.

Octane had obtained IP defense insurance before the dispute arose. When the plaintiff challenged the reasonableness of Octane’s fee claim, the district court’s fee order noted that the carrier’s review of counsel’s bills helped support the reasonable assessment of those fees. Through multiple appeals and remands, the suit took over 10 years to resolve. Having coverage not only supported the defense expenses but also helped Octane stay in the case long enough to recover most of its legal expenses.

Increasing Pressure from AI and NPE Activity

Recent developments in technology and litigation trends have further increased the cost and complexity of patent disputes. Artificial intelligence and software-related patents are playing a larger role in litigation. Disputes involving these technologies often require deep technical analysis of algorithms, data processing methods, and system architecture. This adds to both the duration and cost of cases.

In Recentive Analytics, Inc. v. Fox Corp., 134 F.4th 1205 (Fed. Cir. 2025), the Federal Circuit affirmed dismissal at the pleadings stage of claims from four patents involving machine learning. The court found that the patents applied generic machine learning to event schedules and television network maps without an inventive concept under 35 U.S.C. § 101. The early ruling shows why a budget for an AI patent case must account for threshold eligibility motions as well as technical discovery that may follow.

At the same time, non-practicing entities continue to contribute to overall litigation activity. Because these entities are not subject to counterclaims of infringement, they can present unique challenges for operating companies. Both defending against and pursuing claims in this environment requires substantial financial resources. AIPLA’s Economic Survey shows the cost of patent litigation involving NPEs is 35% higher than litigation with competitors.

In EscapeX IP, LLC v. Google LLC, No. 24-1201 (Fed. Cir. Nov. 25, 2025), a patent owner the court described as a nonpracticing entity sued Google over YouTube features. After EscapeX agreed to dismiss the suit, the district court awarded Google $191,302.18 in attorney fees and costs, then another $63,525.30 for opposing a motion to amend the judgment. The Federal Circuit affirmed, explaining that NPE status alone was not the basis for the fee award; the claims and litigation conduct drove the ruling. Those awards document expenses in this dispute, not a general cost estimate for NPE litigation.

Business Impact Beyond Legal Fees

The cost of patent litigation extends beyond legal invoices. Companies involved in disputes often face operational uncertainty. Internal resources are redirected toward litigation, and strategic initiatives may be delayed. In some cases, businesses adjust product development plans or avoid certain areas of innovation altogether due to litigation risk.

For smaller and mid-sized companies, a single patent infringement dispute can represent a meaningful financial burden. Larger organizations must account for litigation costs as part of their broader risk management and financial planning.

Financial and Strategic Approaches

Given the scale of potential costs, companies are increasingly exploring ways to manage patent litigation risk. Traditional approaches include licensing discussions, early settlement strategies, and joint ventures, all of which may help avoid prolonged disputes. Freedom-to-operate analyses and proactive IP strategy can also reduce the likelihood of litigation.

Third-party litigation funding has become more prevalent, allowing companies to pursue claims with external capital in exchange for a portion of any recovery. While this can improve access to resources, it also introduces additional considerations around control and economic outcomes.

Insurance-based structures have also developed in this area. Historically more common on the defense side, some policies are structured to address both defense costs and the expense of enforcing patent rights. These arrangements can provide a defined framework for managing litigation-related financial exposure, though they require underwriting and alignment with specific coverage terms.

Each of these approaches involves tradeoffs, and companies must evaluate them in the context of their objectives and risk tolerance.

Looking Ahead

The cost of patent litigation shows no signs of slowing. As technology continues to evolve and legal processes grow more complex, both enforcement and defense are likely to remain resource-intensive.

Patent rights continue to play an important role in protecting innovation, but their value is closely tied to a company’s ability to act on them. In today’s environment, that ability depends not only on legal strength, but also on financial preparedness. For companies operating in competitive and technology-driven markets, understanding the full cost of patent litigation and managing the risk of those costs becomes crucial to protecting their business.

Disclosure: The author’s company was involved in the Octane Fitness and Sioux Steel cases detailed in this article.