1.74 Million: How Tesla Counts Its Software Milestone

Automakers have long used specific definitions to highlight growth, but few are as tightly linked to executive pay as Tesla's latest software metric. The company recently reported a significant jump in its Full Self-Driving numbers, a figure that now stands at 1.74 million active subscriptions. This total represents a 67% increase compared to the same period last year, a rate of expansion that underscores the scale of Tesla's software ecosystem.

The definition behind this number is the key to understanding the report. A footnote in the Q3 2026 shareholder letter clarifies that the metric includes both upfront payments and monthly subscriptions. This approach aligns directly with the 2025 CEO Performance Award. By counting owners who purchased the software outright, even if they did so years ago, Tesla inflates the active user base. This is a critical distinction because 10 million active subscriptions is a specific milestone required for the CEO to earn parts of his compensation package.

The inclusion of one-time buyers raises questions about the current revenue model. Tesla stopped selling Full Self-Driving as a one-time purchase on February 14, 2026. New customers in the United States can now only access the feature through a monthly subscription priced at $99. However, those who paid upfront, with prices that previously reached $15,000, remain in the count as long as their vehicles are active. The only group excluded from this total is those on free trials. This method of counting means that a significant portion of the 1.74 million figure does not represent recurring monthly revenue.

Tesla has not disclosed how many of these users are currently paying the monthly fee. In April, the company reported 1.28 million active subscriptions using the same definition. Six months later, the number rose to 1.74 million, but the breakdown between legacy buyers and new subscribers remains unclear. This lack of transparency makes it difficult for investors to gauge the true momentum of the recurring revenue stream. The same accounting approach appears in other parts of the shareholder letter, such as the cumulative delivery figure, which now stands at 10.2 million.

The delivery count also includes unsupervised Robotaxis placed into commercial operation. This addition aligns with another milestone in the pay package, which targets 20 million total vehicles. Tesla claims that more than 75% of new deliveries in North America included FSD subscriptions in the third quarter. The company describes this as a nearly twenty percentage point increase from the previous quarter. It also states its belief that the software is driving demand in markets where it is available, though it does not define exactly how the attach rate is calculated.

The 75% figure is substantial, but the letter does not specify if it includes introductory offers or if it tracks long-term retention. The active subscription metric excludes free trials, but the company does not say if the same rule applies to the attach rate. This ambiguity leaves room for interpretation regarding how many new buyers are sticking with the service after their initial trial period. The road to the 10 million milestone is long, with the CEO's award consisting of 12 tranches. Each tranche requires both a market cap milestone and an operational achievement.

As of June 30, Tesla considered only the 20 million delivery milestone probable. Other targets include 1 million Optimus robots, 1 million robotaxis, and specific adjusted EBITDA goals. The company added 260,000 net FSD subscriptions in the third quarter, marking its best quarter yet. At this current pace, it would take approximately eight years to reach 10 million. If the company maintains the average pace of the last 12 months, which was about 700,000 per year, the timeline extends to nearly 12 years. The award remains valid until 2035.

Counting upfront buyers is not inherently incorrect, as those vehicles do have the software installed. The issue lies in labeling them as subscribers and presenting the total as evidence of momentum. The definition was crafted to align with the compensation plan rather than to provide a clear picture of the business for investors. The board wrote this definition, and the CEO's pay depends on it. The company knows the exact number of people paying $99 a month, but it has not shared that data publicly.

The attach rate offers a more interesting potential signal, assuming it holds up over time. A 75% take rate on a monthly product would represent a strong business performance. Investors are left waiting for clarity on retention rates, specifically how many North American buyers who started subscriptions in the second quarter are still paying today. For now, the 1.74 million figure stands as Tesla's headline software metric, a number that reflects both legacy sales and new adoption.

This metric will likely remain a focal point as Tesla moves toward its long-term goals. The combination of upfront sales and monthly subscriptions creates a complex picture of the company's software business. While the growth rate is impressive, the underlying composition of that growth remains opaque. The board and management have set the stage for a long race to 10 million, with the clock running until 2035. Until Tesla provides more granular data on monthly payers, the 1.74 million figure will remain a blended measure of past and present adoption.