Broadcom's two-year AI forecast runs $166 billion beyond its signed backlog

Management's forecast for the next two fiscal years comes to $345 billion of AI revenue, $115 billion in fiscal 2027 and $230 billion in fiscal 2028 ^[11][2]. Set that against the $179.2 billion of remaining performance obligations on the books at August 2 ^[6] and about $165.8 billion of the forecast is still uncontracted ^[3]. Last quarter the backlog grew by $14.6 billion ^[13]. At that pace the shortfall takes roughly eleven quarters to sign ^[4]. The reported figures do not split remaining performance obligations between AI and everything else ^[14], so the uncontracted share of the AI forecast is larger than $165.8 billion.

Inside the quarter, semiconductor solutions was $20.8 billion of the $29.6 billion total ^[5][4], which leaves $8.8 billion outside that bucket ^[5] and $4.1 billion of semiconductors that are not AI ^[6]. Everything other than AI came to $12.9 billion ^[7]. The fourth-quarter guide of $34.8 billion in total revenue and $21.7 billion of AI ^[10][9] implies $13.1 billion of non-AI ^[8], an increase of 1.6% ^[9], and puts AI at 62% of the company ^[10].

The growth rates back out to a steep ramp. A 221% increase means the same quarter a year earlier produced $5.2 billion of AI revenue ^[11], and the 54% sequential jump means the quarter immediately before produced $10.8 billion ^[12]. Add the guided fourth quarter to the reported third and you get $38.4 billion, about two thirds of the $58 billion full-year figure ^[13], leaving roughly $19.6 billion for the first half if both numbers refer to the same fiscal year ^[14].

The three annual figures are each close to double the one before, $58 billion to $115 billion to $230 billion ^[16]. The 2028 number on its own is 1.65 times the company's current total revenue run rate, taking the guided fourth quarter times four ^[15].

In my view the backlog underwrites the next four to six quarters and says very little about 2028, because $179.2 billion is 6.1 quarters of revenue at the third quarter's rate ^[17]. The counter-thesis is straightforward: custom accelerator programmes get contracted in stages, a buyer committing to 2028 volume signs for it during 2027, and net backlog additions accelerate from here. There is also the duller possibility that the 2028 figure is a design-win pipeline converted to dollars at list volumes. If net additions stay near $14.6 billion a quarter through fiscal 2027, fiscal 2028 will open with the $230 billion forecast and the contracts behind it still unsigned.