May 2026: 2.07% (B+ grade)

California inventionINDEX May 2026: 2.07% (B+ grade)

The inventionINDEX measures innovation output by comparing GDP growth with patent production growth. 

Anything over C grade is positive sentiment; anything under C is negative outlook/sentiment. Using that sentiment, it is possible to observe trends over time, and also compare states/countries. In doing so, we can predict which states have the best chance to recover economically from the pandemic (or any other economic incident that may occur).

California inventionINDEX Scores – Last 12 months

The California inventionINDEX for May 2026 stands at 2.07%, earning a solid B+ rating and marking a vital recovery from the previous month. In April 2026, the index plummeted to its lowest point in the recorded 60-month history, registering a concerning 1.04% and a C rating. The swift upward trajectory in May demonstrates the inherent resilience of the state’s innovation ecosystem, showing that the dramatic drop in April was a temporary aberration rather than the start of a prolonged downturn. This immediate rebound suggests that foundational drivers of inventive output remain active and capable of rapid stabilization.

When evaluated against the broader historical context, the May 2026 score of 2.07% reveals a performance that is stabilizing but still slightly below the multi-year baseline. Over the past 60 months, the historical average for the index hovers around 2.36%, indicating that while the current month reflects an improvement, there is still progress to be made to return to peak historical health. The index reached its pinnacle in October 2023 with a score of 4.05% and an A+ rating, driven by an exceptional surge in creative output. While current figures are a far cry from that historic peak, they demonstrate a return to the steady, moderate growth patterns that characterized much of 2021 and 2022.

Achieving a higher score and an elevated grade carries substantial positive outcomes for the regional economy and the broader technological landscape. High grades, such as the A and A+ ratings frequently observed throughout 2023 and mid-2024, signal a robust and highly productive climate for research, development, and intellectual property creation. These strong metrics serve as a powerful signal to the market, boosting venture capital confidence, accelerating investment in early-stage startups, and fostering high-value job creation. A thriving invention index demonstrates that systemic infrastructure, corporate investments, and academic research are effectively aligning to cultivate groundbreaking advancements, thereby reinforcing California’s standing as a global epicenter of innovation.

Conversely, a lower score and a depressed rating carry serious negative implications for the long-term vitality of the innovation sector. The sharp decline witnessed in April 2026 highlights the vulnerability of the pipeline to external pressures, such as macroeconomic volatility, rising capital costs, or shifting regulatory frameworks. When the index remains depressed, it indicates a slowdown in patent filings and a potential contraction in entrepreneurial risk-taking. If left unchecked, prolonged periods of low activity can lead to a reduction in competitive advantages, causing top-tier talent and venture capital to migrate to more favorable regions, which ultimately diminishes the state’s capacity to pioneer future technologies.

Discussion:

In May, the California inventionINDEX scored a positive sentiment which was lower than the previous year’s average but outperformed the downward trend for the year. This is similar to the prior 12 months, which experienced a slight downward trend. 

As the economy continues to stabilize in the post-pandemic era, it remains uncertain whether any backlog of applications still exists or if the department has returned to normal processing timelines. The inventionINDEX could also be affected by lingering consequences from the pandemic, such as company closures, reduced workforces, and limited R&D capabilities, which may still be impacting current operations.

Learn More:

Are you thinking of patenting any of your bright ideas? Did you know your research work could be eligible for the R&D Tax Credit and you can receive up to 14% back on your expenses? To find out more, please check out our free online eligibility test.

Swanson Reed’s California office provides R&D tax credit consulting and advisory services to Pasadena, Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, Oakland, Bakersfield, Anaheim, Santa Ana, Riverside, Stockton, Chula Vista, Irvine, Fremont, San Bernardino, Modesto, Oxnard and Fontana.

Feel free to book a quick teleconference with one of R&D tax specialists if you would like to learn more about R&D tax credit opportunities.

Who We Are:

Swanson Reed is the largest Specialist R&D tax credit advisory firm in the United States. With offices nationwide, we are one of the only firms globally to exclusively provide R&D tax credit consulting services to our clients. We have been exclusively providing R&D tax credit claim preparation and audit compliance solutions for over 30 years. 

Swanson Reed hosts daily free webinars and provides free IRS CE and CPE credits for CPAs.  For more information please visit us at www.swansonreed.com/free-webinars or contact your usual Swanson Reed representative.