Alphabet makes most of its money by showing ads. When someone searches on Google, watches a video on YouTube, or visits a website that uses Google's ad tools, advertisers pay Alphabet to put their message in front of that person. The more people who search and watch, the more valuable those ad slots become. On top of advertising, Alphabet earns money from Google Cloud, which rents computing power and software tools to businesses, and from consumer subscriptions like YouTube TV, YouTube Premium, and Google One. A smaller group of experimental companies, called Other Bets, includes Waymo's self-driving ride service. Advertising is still the engine, but cloud and subscriptions are growing faster. The diagram below traces where the money goes.

Five years of financial data tell a consistent story: Alphabet is a machine that converts enormous revenue into even more enormous cash. Revenue climbed from $257.6 billion in 2021 to $402.8 billion in 2025, a gain of roughly 56% over four years. Gross margin, the share of each dollar left after the direct cost of delivering services, actually improved over that stretch, rising from about 56.9% in 2021 to nearly 59.7% in 2025. That means Alphabet kept more of each new dollar it earned, not less.

Cash generation followed the same upward path. Operating cash flow, the money left after paying every bill to run the business, rose from $91.7 billion in 2021 to $164.7 billion in 2025. That is not a small jump. It means the business nearly doubled how much actual cash it produced in four years. Free cash flow, which subtracts the cost of building new infrastructure, was more constrained, moving from $67.0 billion in 2021 to $73.3 billion in 2025, because capital spending surged. In 2025 alone, Alphabet spent $91.4 billion on property and equipment, mostly data centers and servers for AI. That is nearly double the $52.5 billion it spent in 2024.

One number in the 2025 data stands out differently. Net debt flipped from negative to positive, meaning Alphabet went from having more cash than debt to carrying more debt than cash for the first time in this five-year window. Net debt moved from negative $12.6 billion at the end of 2024 to positive $15.8 billion at the end of 2025. Alphabet issued $37.3 billion in new bonds during 2025 to fund infrastructure and acquisitions, including a planned $32.0 billion purchase of cloud security company Wiz. The company still holds $126.8 billion in cash and short-term securities, so this is not a distress signal. But it marks a real change in how Alphabet is financing its AI build-out.

Google Cloud is the fastest-growing part of the business right now. Its revenue rose from $43.2 billion in 2024 to $58.7 billion in 2025, a 36% jump in a single year. Its operating income more than doubled in the same period, from $6.1 billion to $13.9 billion. That matters because advertising margins are higher today, but cloud is closing the gap and growing faster. Google Services still produced $139.4 billion in operating income in 2025, dwarfing everything else. The whole enterprise depends on that advertising engine staying healthy.

The risks facing Alphabet are specific and serious, not just the usual fine print. The biggest is legal. In December 2025, a court ruled against Google in a US Department of Justice antitrust case over its search business and advertising technology. The court ordered remedies that include restrictions on how Google distributes its services and requirements to share search data with competitors. Google has appealed, but the outcome is genuinely uncertain. A second regulatory threat comes from the European Commission, which fined Alphabet 3.5 billion euros, accrued in the third quarter of 2025. General and administrative expenses jumped $7.3 billion year over year in 2025, largely because of that fine and other legal accruals totaling $1.4 billion.

Beyond the courtroom, there are two other specific risks worth naming. First, more than 70% of Alphabet's revenue still comes from online advertising. Advertisers can cancel contracts at any time. An economic downturn, or technology that blocks personalized ads more effectively, would hit revenue quickly. Second, Alphabet depends on a small number of suppliers for the specialized chips its AI systems require. Disruptions from trade tensions, tariffs, or energy shortages could delay data center construction and slow cloud growth at exactly the moment Alphabet is betting the most on it.

Alphabet is also spending heavily on Other Bets, which lost $7.5 billion in operating income in 2025. Waymo alone generated a $2.1 billion employee compensation charge in the fourth quarter of 2025 based on an estimated stock valuation. In February 2026, Alphabet funded the significant majority of a $16.0 billion investment round into Waymo. These businesses are consuming real cash while producing very little revenue. Other Bets brought in only $1.5 billion in revenue in 2025, against that $7.5 billion loss.