Apple’s fiscal second quarter of 2026 was a clean top-line win: revenue reached $111.2 billion, up 17% year over year, and Apple called it its best March quarter ever ^[1]. The more revealing detail was below the revenue line. Research and development spending reached $11.4 billion, up roughly 34% year over year, which put R&D at about 10.3% of quarterly revenue ^[1][9].

The quarter at a glance

Metric	Fiscal Q2 2026 result	Why it mattered
Revenue	$111.2 billion, up 17% year over year	Apple’s best March quarter ever [1]
Diluted EPS	$2.01, up 22% year over year	Another March-quarter record [1]
Products net sales	$80.2 billion	Products remained the majority of revenue [5]
Services net sales	$31.0 billion	Services reached an all-time high [5]
iPhone	March-quarter revenue record	Apple cited strong demand for the iPhone 17 lineup; a third-party earnings summary put iPhone revenue growth at about 22% year over year [1][4]
R&D expense	$11.4 billion, up about 34% year over year	The highest quarterly R&D figure reported in the available coverage [9]

What drove Apple’s record March quarter

iPhone was the clearest growth engine

Apple specifically highlighted a March-quarter iPhone revenue record, saying demand for the iPhone 17 lineup fueled the result ^[1]. A separate earnings-call summary reported iPhone revenue growth of about 22% year over year, despite supply constraints affecting some iPhone and Mac models ^[4].

That matters because Apple’s record was not simply a Services story or a margin story. The company’s core hardware franchise still did a large share of the work, with Products generating $80.2 billion in net sales for the quarter ^[5].

Services added scale with another record

Services net sales reached $31.0 billion, setting an all-time high ^[5]. Against total revenue of $111.2 billion, that means Services represented roughly 28% of Apple’s quarterly revenue ^[1][5].

The Services result helped make the quarter broader than a single-product beat. Apple also said revenue grew by double digits across every geographic segment ^[1].

Earnings and cash flow reinforced the headline

The March quarter was not just a revenue record. Diluted earnings per share rose 22% year over year to $2.01 ^[1]. Apple also generated more than $28 billion in operating cash flow during the quarter, according to a filing summary ^[5].

Why R&D crossed 10% of revenue

The explanation is mostly arithmetic: R&D grew much faster than revenue.

Apple reported $111.2 billion in quarterly revenue ^[1]. Available reporting put R&D expense at $11.4 billion, up about 34% year over year ^[9]. Divide $11.4 billion by $111.2 billion and the R&D ratio is about 10.3%.

So the 10% milestone was not caused by weak sales. Sales were strong: revenue was up 17% and set a March-quarter record ^[1]. The ratio rose because R&D grew at roughly twice the pace of revenue ^[1][9].

What Apple appears to be spending on

The provided sources do not break Apple’s R&D expense into project-level categories, so the safest reading is a broad investment ramp rather than a single disclosed program. Still, the direction is clear.

9to5Mac linked Apple’s record R&D spending to the wider industry push into AI development ^[9]. A separate earnings-call summary said Apple was investing more in R&D across products and services ^[4]. Taken together, the reporting points to AI as a major pressure point, but not the only possible use of the spending.

The bottom line

Apple’s record March quarter was driven by a familiar combination: iPhone strength, a new Services high, broad geographic growth, and solid earnings performance ^[1][5]. The R&D milestone tells a different story: Apple is increasing investment faster than revenue is growing, with available reporting pointing especially to AI and broader product-and-services development ^[4][9].

That is the key takeaway from the quarter: Apple delivered a record present while spending more aggressively on the future.