Read Microsoft’s fiscal-2026 income statement and you will struggle to find a better year in the company’s history: revenue of $331.8B, up 17.8%, a growth rate in the 93rd percentile of its own trailing records; an operating margin of 46.8% that brushes the all-time high; and net income up 31.3% to $133.7B.
Then read the cash flow statement.
What actually changed
Free cash flow (operating cash flow minus capital expenditure, the money actually available for buybacks, dividends and the balance sheet) fell 6.5% to $67.0B. Against revenue, that is a 20.2% FCF margin: not just low for Microsoft, but the lowest of any trailing-twelve-month window in the seventeen years of filings we analyse. The previous trough was 22.9%.
A company posting near-record accrual profitability and record-low cash profitability in the same filing is the single most analytically interesting thing in this 10-K.
Source: SEC EDGAR XBRL company facts, 10-K/10-Q filings. Quarterly cash-flow values derived from cumulative filings.
View chart data
| Period | Operating margin (TTM) | FCF margin (TTM) |
|---|---|---|
| FY24 Q2 | 44.2% | 29.6% |
| FY24 Q3 | 44.7% | 29.8% |
| FY24 Q4 | 44.6% | 30.2% |
| FY25 Q1 | 44.5% | 28.6% |
| FY25 Q2 | 45.0% | 26.7% |
| FY25 Q3 | 45.2% | 25.7% |
| FY25 Q4 | 45.6% | 25.4% |
| FY26 Q1 | 46.3% | 26.6% |
| FY26 Q2 | 46.7% | 25.3% |
| FY26 Q3 | 46.8% | 22.9% |
| FY26 Q4 | 46.8% | 20.2% |
| FY27 Q1 | 47.1% | 17.3% |
The wedge is capex, and it is enormous
The decoupling has a single, visible cause. Capital expenditure reached $115.9B in FY2026, up 79.6% in one year, and now absorbs 34.9% of revenue. For scale: for most of the past decade Microsoft spent roughly a tenth of revenue on capex; it now spends a third.
Crucially, the underlying cash engine has not weakened. Operating cash flow rose 34.4% to $182.9B, growing faster than revenue, faster even than net income. Microsoft is generating more cash than it ever has. It is also spending it on data-centre capacity faster than it generates it.
| FY2026 (TTM, to June 2026) | Value | Change YoY |
|---|---|---|
| Revenue | $331.8B | +17.8% |
| Operating margin | 46.8% | +1.2pp |
| Net income | $133.7B | +31.3% |
| Operating cash flow | $182.9B | +34.4% |
| Capital expenditure | $115.9B | +79.6% |
| Free cash flow | $67.0B | −6.5% |
| FCF margin | 20.2% | −5.2pp |
What it means for value
Our discounted-cash-flow model puts a number on the trade-off. If the 5.2pp fall in free-cash-flow margin over the past year proves permanent, it lowers Microsoft’s model value by 20.6%, all else equal. Each further point of margin given up to capex is worth another 5.0%.
The offset has to come from growth: five points of faster growth for five years would add 30.9% to model value, roughly cancelling the margin damage. That is the implicit bet in the capex programme, in valuation terms. The model is also sensitive to the return investors demand: a discount rate one point higher removes 15.9%. These are model values under stated assumptions, not a comparison with the share price.
How to think about it
The bull reading: this is investment, not deterioration. Capex of this scale is a choice, and the 34.4% growth in operating cash flow suggests the underlying business can fund it. If AI infrastructure earns anything like Microsoft’s historical returns on capital, today’s record-low FCF margin is the cost of tomorrow’s revenue base, and the depreciation now flowing through the income statement is being absorbed while margins still expand.
The bear reading: a dollar of capex is a dollar gone regardless of the accounting, and the income statement will feel this spending for years as depreciation compounds. A 46.8% operating margin already prices in excellent execution; the cash flow statement says shareholders are currently receiving less of each revenue dollar than at any point in the dataset. If AI revenue disappoints, the spending does not un-happen.
What the data cannot tell us (and we won’t pretend otherwise) is which reading wins. That depends on the return earned on the $115.9B, which no current filing discloses.
Bottom line
FY2026 was simultaneously Microsoft’s best income statement and its most expensive cash flow statement. Anyone quoting the 31.3% earnings growth without the 6.5% free-cash-flow decline, or vice versa, is telling half the story. The number to watch from here is not revenue growth; it is whether FCF margin stops falling while capex intensity stays above 30%.
