Apple (NASDAQ: AAPL) turned in a September quarter that cleared the bar on both revenue and earnings. The $114.5 billion top line beat consensus by roughly 1%, while diluted EPS of $2.10 came in about 5.5% above the $1.99 estimate. Revenue grew 12% year over year, accelerating from the 5% clip in the prior quarter. EPS rose 14% from $1.85 a year ago.
Two engines drove the headline numbers. iPhone revenue hit $57.6 billion, a September quarter record and a 17.5% jump from $49.0 billion a year prior. Apple credited the iPhone Duo and iPhone 18 lineup, which launched during the quarter. Services revenue also set a record at $31.6 billion, up 10% year over year, reflecting continued expansion of the installed base and ecosystem engagement. iPhone and Services combined for 78% of total revenue, up from 76% in the year-ago quarter.
Gross margin landed at 47.9%, up from 47.2% a year ago. That includes a roughly 1 percentage point benefit from tariff refunds, which also added about $0.05 to EPS. Strip that out and gross margin would have been around 46.9%, roughly flat sequentially and slightly below the 47.2% reported a year ago. The tariff refund is a one-off, not a structural improvement in product cost. Operating income rose 9.9% to $35.6 billion, but operating margin contracted to 31.1% from 31.6% a year ago. R&D spending surged 32% to $11.7 billion. That ramp is the price of the product cycle Apple is promoting, including new Siri AI and home hardware.
Capital allocation stayed aggressive. Apple returned $28 billion to shareholders in the quarter, including $86.4 billion in share repurchases over the full fiscal year. That pace stands out given some strain showing in the cash position. Inventories ballooned to $14.5 billion from $5.7 billion a year ago, a 154% increase likely reflecting pre-building for the holiday quarter and component commitments. Accounts payable also jumped to $82.3 billion from $69.9 billion, suggesting Apple is stretching suppliers to manage working capital. Net cash (cash and marketable securities minus total debt) stood at $36.8 billion, down from $33.7 billion a year ago though still ample.
The installed base of active devices hit a record across all major product categories and geographies. That metric underpins the Services revenue trajectory. Services gross margin remained high at 75.9%, down slightly from 75.3% a year ago, while product gross margin improved to 37.2% from 36.2%, helped by the tariff refund and likely favorable mix from higher-priced iPhone models.
Management did not provide formal guidance for the December quarter, which is typical. The tone from CEO John Ternus and CFO Kevan Parekh was nonetheless confident. Ternus called the current lineup "the most ambitious yet." Parekh highlighted record operating cash flow of $28 billion. Still, the absence of a guidance raise despite a clear beat signals caution about the holiday quarter, possibly reflecting uncertainty around consumer demand or supply chain costs. The real story this quarter is not the beat itself but the sustainability of the iPhone upgrade cycle and whether the R&D spend starts to pay off in Services attach rates and product differentiation. The tariff refund was a one-off; the R&D ramp is permanent. Watch whether gross margins can hold above 47% without that benefit, and whether the inventory build turns into a liability if demand softens.