Tesla's FSD (Supervised) Attach Rate Hit 75% on New Vehicles. Here's Why That Single Number Could Matter More Than Robotaxi for the Stock in 2027.

Tesla's Full Self-Driving (Supervised) subscription attach rate hit 75% on new vehicles in the third quarter of 2026, a 20 percentage point increase from the previous quarter. With approximately 1.74 million active paid FSD customers worldwide, this represents a 67% annual growth. Roughly half of these subscribers use monthly payments, potentially creating a predictable software business alongside Tesla's automotive operations.

If Tesla reaches 2 million paying monthly subscribers at $99 per month, that would generate approximately $2.38 billion in annualized subscription revenue and $3.56 billion with 3 million subscribers. While a 75% sign-up rate is impressive, a higher retention rate would be more valuable. FSD is not autonomous and drivers must remain attentive.

Nevertheless, Tesla's robotaxi business faces regulatory and operational uncertainties. However, FSD subscriptions provide measurable growth and opportunities for a multibillion-dollar software revenue stream. Three key numbers to watch in 2027 are total paid FSD customers, the percentage paying monthly, and customer retention.