Microsoft (MSFT): Its Best Quarter Ever — But $140B of AI Capex Is Eating the Cash Flow

Microsoft Corporation (MSFT) Q4 FY2026 — Microsoft (MSFT) reported fiscal Q4 2026 (quarter ended June 30, 2026) after the close on July 29, 2026, alongside its FY26 10-K. Revenue was $90.007B, +18% YoY (+17% constant currency) versus roughly $87.6B expected; GAAP diluted EPS $4.81 (+32%) and adjusted EPS $4.74 versus about $4.24 expected; operating income $40.6B (+18%) at a 45.1% margin. Azure and other cloud services grew 43% (43% cc), accelerating from 39/40/39/40 in the four prior quarters, and Azure crossed $100B of annual revenue for the first time. Microsoft Cloud revenue was $59.3B (+27%) but its gross margin fell to 65% — a fourth consecutive quarterly decline from 68%, which management attributes to sales mix shift to Azure and continued AI infrastructure investment. Commercial remaining performance obligation reached $678B (+84%; +25% excluding OpenAI) with a 2.3-year weighted-average duration. Microsoft 365 Copilot passed 30 million paid seats (from 15M two quarters ago) while M365 commercial seat growth stayed at +6% for a sixth straight quarter — so Copilot is ARPU, not seats. For the full fiscal year: revenue $331.8B (+18%), operating income $155.2B (+21%) at a 46.8% margin (+120bps), GAAP EPS $17.95 (+32%). The problem is cash: FY26 cash additions to property and equipment were $115.9B plus $24.6B of finance-lease additions (~$140.6B, 42.4% of revenue versus 22.9% in FY24), so free cash flow fell for a third straight year to about $67.0B (from $71.6B and $74.1B) and Q4 free cash flow dropped 23% to $19.6B. Leases signed but not yet commenced jumped from $92.7B to $329.1B. Depreciation is up 126% in two years to $34.3B. Microsoft funded all of it with zero new debt, drawing cash down 18.7% to $76.8B, lifting finance-lease liabilities 44% to $66.6B and stretching unpaid capex in payables by $19.8B to $26.7B. Return on invested capital fell from about 24.5% to 22.8% as invested capital grew 26.9% against 18.1% NOPAT growth. The quarter's beat also included a $3.2B Anthropic gain that is not mentioned once in the 10-K, and the FY27 extension of data-centre and office-building useful lives from 15 to 25 years was disclosed only on the call. The stock closed at $390.54 (-0.71%) on July 29 before the print and traded at $425.01 (+8.83%) in the after-hours session at 7:59pm ET. Our owner-earnings DCF — operating cash flow less expensed stock comp less a maintenance-capex charge of about $52.8B — lands at a base case near $385 at a 9% discount rate (bear $232, bull $497), so $425.01 is roughly 9% above our value; the reverse DCF says today's price requires owner earnings to compound near 10% a year for five years against our ~7%. Our call: HOLD, 3/5 — an A-grade franchise at a price that needs the AI capex to work. Wall Street is at a BUY consensus with a ~$538 average target (66 buy / 16 hold / 0 sell, 82 analysts, all dated on or before July 28 and therefore pre-print), implying about +27%, so we DIFFER and are materially more cautious. Microsoft just printed the best quarter in its history — and its stock spent the previous twelve months falling. Fiscal Q4 2026 (quarter ended June 30, 2026, reported after the close on July 29): revenue $90.007B, +18% YoY and +17% in constant currency, against roughly $87.6B expected. GAAP diluted EPS $4.81, up 32%; adjusted EPS $4.74 versus about $4.24 expected. Operating income $40.6B, +18%, at a 45.1% margin. Azure grew 43% — accelerating from 39, 40, 39 and 40 in the four prior quarters — and crossed $100 billion of annual revenue for the first time, with management stating plainly that customer demand continues to exceed supply. The contracted commercial backlog hit $678B, up 84%, and still up 25% excluding OpenAI. Microsoft 365 Copilot passed 30 million paid seats, tripling in three quarters, while M365 commercial seat growth stayed pinned at +6% for a sixth straight quarter — the Copilot story is ARPU, not seats. For the full year: revenue $331.8B (+18%), operating income $155.2B (+21%), operating margin 46.8% (+120bps), GAAP EPS $17.95. So why did the market cap fall 25% across fiscal 2026? One line: cash. Microsoft spent $115.9B of cash on property and equipment plus $24.6B of finance leases — about $140.6B, or 42.4% of revenue, up from 22.9% two years ago — and free cash flow fell for a third consecutive year to roughly $67.0B, with Q4 free cash flow down 23%. Microsoft Cloud gross margin has now fallen four quarters running, 68% to 65%, for reasons management itself calls structural: mix shift to Azure and continued AI infrastructure investment. Depreciation is up 126% in two years. Leases signed but not yet commenced went from $92.7B to $329.1B. Return on invested capital slipped from ~24.5% to ~22.8% because invested capital grew 27% while operating profit after tax grew 18% — the first time at this scale that Microsoft is compounding capital faster than profit. We also flag two disclosure issues: the $3.2B Anthropic gain inside the earnings beat is not mentioned once in the 10-K, and the FY27 extension of building useful lives from 15 to 25 years — which also reclassifies future data-centre leases out of the capex line — was spoken on the call only. Our owner-earnings DCF (operating cash flow, less expensed stock comp, less a ~$52.8B maintenance-capex charge reflecting what it costs to replace a $432B gross asset base) lands at a base case near $385 per share at 9%, with a bear case of $232 and a bull case of $497 if six-year server lives hold and the fleet really is pre-sold. The stock closed at $390.54 the afternoon it reported — within 1.5% of our number — then traded at $425.01 after hours, about 9% above it. Run the DCF backwards and $425 requires owner earnings to compound near 10% a year for five years; our work says about 7%. Our call: HOLD, 3/5. The franchise grades an A; the price does not. We would be buyers back under about $350. Wall Street is overwhelmingly bullish — a BUY consensus, 66 buys against 16 holds and no sells, average target near $538, every one of those targets published on or before July 28 and therefore pre-print — so we DIFFER, and materially. Watch free cash flow, Microsoft Cloud gross margin, and return on invested capital every quarter; they will settle the argument. Not financial advice. THE CALL: HOLD (3/5, THE BEST QUARTER IT HAS EVER PRINTED — AT A PRICE THAT NEEDS THE AI CAPEX TO WORK) — base-case value ~$385.00 vs ~$425.01 today. What to watch: the free-cash-flow line inflecting would turn us more constructive — capital spending flattening while Azure holds above 40% growth, which would reverse three years of falling free cash flow almost immediately; that is not imminent, since management guided capex over $50 billion for Q1 FY2027 and growing for the full year; the risks to respect are the opposite — Microsoft Cloud gross margin slipping below 63%, Azure decelerating into the mid-thirties, or a fourth consecutive year of falling free cash flow, and note that management's only FY2027 cash commitment is that Microsoft will remain free-cash-flow positive, a strikingly low bar for this company Also on YouTube: @ChargedAlpha DISCLAIMER: For informational and educational purposes only. Not financial advice. Do your own research before any investment decision.