Automotive Metrics: Tesla's FSD Count and the Compensation Question

The definition of a software customer is becoming a significant point of contention in the electric vehicle sector.

Tesla has reported that it now holds 1.74 million active subscriptions for its Full Self-Driving technology, marking a 67% increase from the previous year. A specific footnote in the company's third-quarter 2026 shareholder letter clarifies that this total includes both monthly subscribers and owners who purchased the software upfront. This accounting method is explicitly tied to the 2025 CEO Performance Award, a compensation package that requires Elon Musk to reach specific operational milestones, including 10 million active FSD subscriptions, to earn his full pay.

The inclusion of upfront buyers in the subscription count has significant implications for how the company's growth is perceived. Since Tesla ceased selling FSD as a one-time purchase on February 14, 2026, new customers in the United States are limited to a $99 monthly plan. However, those who paid upfront prices reaching as high as $15,000 before that date remain in the active count for as long as their vehicles are operational. The only exclusion from this metric is free trials, meaning hundreds of thousands of owners who were sold unsupervised self-driving capabilities years ago are currently being counted as active subscribers despite Tesla not yet delivering that specific level of autonomy.

This counting methodology is consistent with other figures in the shareholder letter. Tesla’s cumulative delivery count, now at 10.2 million, also includes unsupervised Robotaxis placed into commercial operation to align with the 20 million vehicle milestone required for the CEO’s compensation. While Tesla noted that 260,000 net new FSD subscriptions were added in the third quarter, its best performance to date, the company has not disclosed how many of the 1.74 million total accounts are currently paying the monthly fee. This lack of clarity remains a point of interest for investors, particularly since the company reported 1.28 million accounts under this definition in April.

In North America, Tesla claims that more than 75% of new deliveries in the third quarter included FSD subscriptions, representing a nearly twenty percentage point increase from the previous quarter. The company attributes this demand directly to the availability of the software. However, the letter does not define exactly how this attach rate is calculated. It is unclear whether this figure accounts for introductory offers or how many of those initial buyers remain active after several months, a distinction that is crucial for understanding the true retention rate of the service.

The timeline to reach the 10 million active subscription milestone varies depending on the growth rate used. At the current pace of the last quarter, it would take approximately eight years to reach the target. If the average growth over the last 12 months of roughly 700,000 accounts per year is maintained, the timeline extends to about 12 years. The compensation award remains active until 2035, and as of June 30, Tesla considered only the 20 million vehicle delivery milestone to be probable. The board has written these specific definitions into the contract, making the precise nature of the active base a critical factor in the CEO's potential payout.