Average Cost of Patent Litigation in the US: 2026 Benchmarks & Cost-Reduction Strategies

1. What Does Patent Litigation Actually Cost?

The average cost of patent litigation in the US in 2026 ranges from roughly $600,000 to over $3.6 millionper side through trial, depending primarily on the amount at risk in the dispute. According to AIPLA benchmarks, even a relatively modest case with under $1 million at stake costs $300,000 through discovery alone, while high-stakes disputes exceeding $25 million routinely surpass $3.6 million through trial. These figures cover the full lifecycle—from pre-filing investigation through post-trial motions—and include attorney fees, expert witness costs, e-discovery expenses, and court-related charges.

The single biggest determinant of total cost is the amount in controversy. Higher-stakes cases attract larger legal teams, more extensive discovery, multiple expert witnesses, and longer trial durations. But the litigation landscape itself is shifting: over 75% of patent cases settle before trial, with 40% settling within the first year. The timing of settlement matters enormously—a case resolved during early discovery may consume only 30–40% of the through-trial estimate.

Other factors that influence cost include the complexity of the technology, the number of patents asserted, venue selection, whether the case involves standard-essential patents (SEPs), and whether the parties pursue parallel proceedings at the PTAB or the International Trade Commission (ITC). The rise of litigation funding—now a $19.3 billion global market projected to reach $53.2 billion by 2035—has also reshaped the economics, with an estimated 50–75% of patent lawsuits against major tech companies now involving suspected third-party funding.

It is also worth noting that these figures represent per-side costs. A plaintiff and defendant in the same case may each spend comparable amounts, meaning the total resources consumed by a single patent dispute can easily double the numbers below.

2. Cost Benchmarks by Amount in Controversy

The American Intellectual Property Law Association (AIPLA) has conducted biennial surveys of patent litigation costs for decades, and those benchmarks remain the most widely cited reference points in the industry. The figures below reflect current AIPLA data for 2026, broken down by amount at risk and litigation phase.

Several patterns emerge from these benchmarks. Discovery is the most expensive phase, consistently consuming 50–65% of total litigation spend. This is driven largely by the cost of document collection, review, and production—document review alone accounts for 70–80% of all discovery spending. Pre-trial motions, including claim construction (Markman hearings), account for a significant portion of pre-discovery costs, while trial preparation and the trial itself round out the remainder.

Cases that settle before trial—which represents over 75% of all filings—will obviously cost less than these through-trial figures. Roughly 40% of patent cases settle within the first year, often before the bulk of discovery spending has occurred. A case settled on the courthouse steps, by contrast, may have already consumed 80–90% of projected costs.

3. Where the Money Goes

Understanding the composition of patent litigation expenses helps identify opportunities for cost control. The four major cost categories are outlined below.

4. Cost Differences by Venue

Venue selection is a strategic decision that directly impacts litigation cost and timeline. In 2025, patent filings were heavily concentrated: the Eastern District of Texas alone captured 27.7% of all patent cases nationally, followed by the Western District of Texas at 11.5% and the District of Delaware at 11.4%. Each venue carries distinct cost implications.

Venue selection involves trade-offs beyond raw cost. The Southern District of New York offers the fastest path to trial at approximately 16.7 months, but demands intensive monthly spending to meet compressed deadlines. Delaware, by contrast, takes nearly 44 months on average—spreading costs over a longer period but increasing the risk of total spend creep as additional motions and disputes arise. The Eastern District of Texas has reclaimed its position as the dominant patent venue, handling more than one in four cases filed nationally.

The ITC merits special attention. While it does not award monetary damages, an exclusion order can be far more valuable than any damages award because it blocks infringing products at the border. With a roughly 45% trial rate—far higher than district courts—ITC investigations are among the most expensive patent proceedings in the US, often running $3–$6 million per side due to the compressed 15–18 month schedule and broad discovery obligations.

5. Patent Trial & Appeal Board (PTAB) as a Lower-Cost Alternative

For parties seeking to challenge patent validity without the expense of full district court litigation, the Patent Trial and Appeal Board (PTAB) offers a significantly more cost-effective path. Total costs for an inter partes review (IPR) typically range from $300,000–$600,000per side—a fraction of district court litigation. However, the PTAB landscape is evolving: 1,281 petitions were filed in 2025, a 5.8% decrease from the prior year, and the institution rate has declined to 56% in FY2026 from a historical average of roughly 67%.

• Inter Partes Review (IPR): The most common PTAB proceeding, an IPR challenges patent validity based on prior art patents and printed publications. When claims are instituted, the results are decisive: 76.56% of instituted claims are ultimately cancelled. The proceeding must be completed within 12–18 months of institution, making it far faster than district court alternatives.
• Post-Grant Review (PGR): Available only within nine months of a patent’s issuance, PGR permits challenges on any ground of invalidity, including § 101 eligibility and § 112 written description. PGR costs are comparable to IPR but filings remain less common due to the narrow filing window.
• Ex Parte Reexamination: As IPR institution rates have tightened, ex parte reexamination filings surged 66% in 2025, reflecting a strategic shift by practitioners seeking alternative administrative challenges with different procedural dynamics and no estoppel risk.

PTAB proceedings carry important strategic limitations. They address only patent validity—not infringement—and the estoppel provisions of 35 U.S.C. § 315(e) prevent petitioners from raising in subsequent litigation any invalidity ground that was raised or reasonably could have been raised during the IPR. With the institution rate declining to 56%, the strategic calculus has shifted: petitioners face a meaningful risk that their challenge will not even be heard, while still incurring $100,000–$200,000 in petition preparation costs. The 66% surge in ex parte reexamination filings suggests practitioners are actively seeking alternatives.

6. Strategies to Reduce Litigation Costs

While patent litigation is inherently expensive, several well-established strategies can reduce costs without sacrificing case quality.

1. Early case assessment (ECA). Before committing to full-scale litigation, invest in a focused, time-limited evaluation of the patent’s strength, the accused product’s design, and likely damages. A well-executed ECA—typically costing $30,000–$75,000—can identify cases that should be settled early or abandoned entirely, avoiding millions in downstream spend. Given that 40% of patent cases settle within the first year, early assessment is essential for avoiding unnecessary discovery costs.
2. Litigation funding. The global litigation funding market has reached $19.3 billion in 2025 and is projected to grow to $53.2 billion by 2035. Third-party funders finance patent cases in exchange for a share of any recovery, typically requiring a 2–3x return on their investment. This shifts financial risk from the patent holder to the funder while providing access to top-tier counsel. An estimated 50–75% of patent lawsuits against major technology companies now involve suspected third-party funding, making this a mainstream component of patent litigation economics.
3. AI-powered document review and claim charting. Artificial intelligence is transforming patent litigation economics. One Am Law 100 firm reported cutting document review time by 67% using AI tools, while AI-assisted claim charting delivers 70–90% time savings compared to manual preparation. Thomson Reuters projects that AI will save 240 hours per legal professional annually. With document review consuming 70–80% of discovery budgets, these tools represent the highest-impact cost reduction lever available today. Courts in multiple jurisdictions have approved technology-assisted review (TAR) protocols, and the Sedona Conference has published best-practice guidelines.
4. Phased discovery. Rather than opening all discovery at once, negotiate with the court to phase discovery—starting with claim construction and limited technical discovery before expanding to damages-related discovery. If early rulings on claim scope narrow the case or prompt settlement, the parties avoid the cost of full damages discovery entirely. Several courts, including N.D. California and D. Delaware, have local rules that support phased approaches.
5. Mediation and arbitration. Alternative dispute resolution (ADR) can resolve patent disputes at a fraction of trial cost. Mediation, typically costing $20,000–$50,000, is non-binding but resolves a surprising percentage of cases when conducted after Markman rulings give both sides a clearer view of the claim construction landscape. Binding arbitration is more expensive ($100,000–$300,000) but still substantially cheaper than trial and produces a final, enforceable result.

7. When Patent Litigation Is Worth the Investment

Given the substantial costs outlined above, patent litigation should be approached as a business investment, not merely a legal exercise. With NPEs filing 55.4% of all patent cases and litigation funders requiring 2–3x returns, the economics of enforcement demand disciplined analysis.

The fundamental calculation is straightforward: expected recovery (damages × probability of success) must exceed total litigation costs by a sufficient margin to justify the risk, the management distraction, and the opportunity cost of capital deployed over a multi-year timeline.

Sophisticated patent holders also consider the portfolio effect of litigation. A successful enforcement action against one infringer can strengthen licensing negotiations with others, creating a multiplier effect on portfolio value that goes beyond the direct damages recovered in any single case. Conversely, an unsuccessful enforcement action can weaken the perceived strength of the entire portfolio.

Ultimately, the decision to litigate should be informed by rigorous analysis, not instinct. With 4,531 cases filed in 2025 and rising, the competitive landscape for patent enforcement continues to intensify. By combining accurate cost estimates with realistic damages projections and probability assessments, patent holders can allocate enforcement resources where they will generate the greatest return.

Sources

Selected primary or official reference materials used for this guide.

• AIPLA Report of the Economic Survey
• PTAB Statistics — USPTO
• GAO Report: Information on Third-Party Funding of Patent Litigation (GAO-25-107214)