Big Tech's AI Spending Projected to Reach $2.8 Trillion by 2029

Citigroup forecasts that Big Tech companies will spend over $2.8 trillion on artificial intelligence by 2029. This estimate is based on the growing demand for AI solutions and the increasing investment in AI technology. The forecast is expected to drive growth in the tech sector and have a significant impact on the global economy.

Citigroup has forecasted that Big Tech companies will spend over $2.8 trillion on artificial intelligence by 2029, driven by increasing demand for AI solutions and substantial investments in AI technology. This estimate underscores the growing importance of AI in the tech sector and its potential impact on the global economy.

The forecast highlights the significant role AI is playing in the industry. Companies like NVIDIA, Google, and Microsoft are leading the charge, investing heavily in AI infrastructure and cloud services. NVIDIA's recent announcement to invest up to $100 billion in OpenAI, providing both equity and AI chips, is a prime example of this trend AI Stocks Frenzy: Nvidia’s $100B Bet & Other Big Moves Ignite Markets (Sept 28–29, 2025)^[1]. Google's parent company, Alphabet, has also seen its stock valuation hit $3 trillion on AI optimism and a favorable U.S. court ruling .

Microsoft has reported booming Azure growth and a record $30 billion capex plan, while Alphabet's Google Cloud cited a $106 billion sales backlog, mostly from AI clients . These investments are not just confined to the U.S. but are also seen in China, where Alibaba's stock jumped after unveiling a partnership with NVIDIA and plans for global AI data centers .

While the investment in AI is substantial, there are also concerns about antitrust issues and regulatory scrutiny. Analysts have warned that deals like NVIDIA's investment in OpenAI could fuel antitrust concerns . Additionally, the European Union is gearing up to impose a record fine on Google under its new Digital Markets Act , and U.S. regulators remain watchful over AI exports and research in sensitive areas .

Despite these concerns, the forecast suggests that the AI market is expected to grow significantly. Analysts like Bill Gross have warned of potential "malinvestment" if the current trends continue, but others see continued upside with more infrastructure buildouts and spending . The U.S. fiscal stimulus, which includes trillions in tax cuts and spending, could also drive real-demand in various sectors, including energy, biotech, and defense .

As the AI party continues to mature, investors are advised to adopt a balanced strategy, favoring cyclicals, infrastructure, and value stocks. This approach can help mitigate the risks associated with overinvestment in AI and ensure a more sustainable growth trajectory for the tech sector.