Stablecoin Flow: The $500 Billion Deposit Drain and $1 Trillion Treasury Demand

The core threat to traditional banking is a massive, quantifiable drain on its funding base. Standard Chartered's latest analysis projects that as much as $500 billion in U.S. bank deposits could migrate to stablecoins by the end of 2028. That figure represents roughly one-third of all U.S. bank deposits and signals a structural shift away from deposit-driven banking models.

The mechanism is payments. Stablecoin adoption is accelerating through everyday transactions, not just speculative trading. Visa-linked card spend hit a $3.5 billion annualized run rate last quarter, a 460% year-over-year surge. This volume is the direct channel for deposit outflows, as users move funds from checking accounts into stablecoins for spending and settlement.

Regional banks are the most vulnerable. Their business model is built on net interest margins, which rely heavily on low-cost deposits. When deposits flee to stablecoins, it directly pressures their core earnings. In contrast, diversified and investment banks are relatively insulated by broader revenue streams. The risk is compounded by regulatory uncertainty, as debates over stablecoin yield loopholes intensify on Capitol Hill.

The Treasury Demand Engine: $1 Trillion in New T-Bill Buyers

The outflow from banks is matched by a massive new inflow into U.S. Treasuries. As stablecoin issuers like Tether and Circle build reserves to back their tokens, they are projected to become some of the biggest buyers of short-term debt. Standard Chartered analysts expect these companies to purchase between $800 billion to $1 trillion in short-term Treasury bills by 2028.

This creates a structural shift in demand. The report warns that this surge could push total short-term Treasury demand to $2.2 trillion, potentially outpacing supply by about $900 billion over the next three years. The Treasury may respond by pausing its 30-year bond auctions for up to three years to prioritize T-bill issuance, a move that would effectively suspend long-dated debt sales.

The scale is immense. Even with recent market stagnation, the stablecoin market is projected to reach $2 trillion by 2028. To back that growth, issuers need safe, liquid assets, making T-bills a natural choice. This new demand could force a historic reshaping of the U.S. debt portfolio, with the Treasury leveraging the excess to manage its borrowing strategy and potentially keep long-term yields in check.

Catalysts and Risks: The Path to 2028

The projected $500 billion deposit drain and $1 trillion Treasury demand hinge on a single, accelerating driver: transaction volume. Stablecoin payments have exploded, with annualized volume hitting $122 billion in 2025 and total transaction volume exceeding $34 trillion last year. This growth is the engine for deposit outflows, as users move funds from bank accounts to stablecoins for everyday spending and settlement. The pace of this migration will determine if the 2028 targets are met or missed.

A key secondary catalyst is the expansion of stablecoin lending. The market has already originated $670 billion in loans over five years, creating a new layer of demand for reserves. As lending grows, so does the need for issuers to hold backing assets, further fueling Treasury purchases. This creates a feedback loop where payments drive deposits out, and lending drives reserves in.

The primary risk is regulatory uncertainty. While the US adopted stablecoin legislation in mid-2025, its full impact on adoption and the market's complex structure remains unclear. The market is far more varied than a simple "dollar-pegged" definition suggests, with over a hundred stablecoins in circulation using different mechanisms. Regulatory clarity is needed to resolve these definitional questions and govern the diverse products, which could either accelerate or stall the predicted flows.