Fintech adoption reshapes the stability of retail bank deposits by changing how customers hold, move, and perceive cash balances. Evidence reviewed by Jon Frost at the Bank for International Settlements highlights that faster payments, platform accounts, and nonbank deposit-like instruments increase the substitutability of traditional deposits, making them less captive to legacy banks. Douglas Arner at the University of Hong Kong documents how digital onboarding and alternative credit and savings products lower switching costs and can reallocate funding away from banks. Stijn Claessens at the International Monetary Fund frames these shifts as both opportunities for broader deposit mobilization and sources of new fragility through rapid flows.
Mechanisms
Key drivers include reduced friction in payments and account opening, the rise of big-tech and fintech wallet balances, and regulatory gaps that create digital disintermediation. When consumers can transfer funds instantly to an e-wallet or choose deposit-like products offered by nonbank platforms, the traditional stickiness of savings and checking accounts declines. This increases liquidity risk for banks because core retail deposits—historically a stable funding base—become more flight-prone in response to market signals or platform incentives. In jurisdictions with limited digital identity infrastructure, onboarding remains harder and deposits can stay relatively stable; in highly connected markets, switches happen faster.
Consequences and policy responses
Consequences combine risks and benefits. On one hand, fintech can enhance financial inclusion by mobilizing savings from previously unbanked populations, as documented across multiple country studies. On the other hand, the fragmentation of funding heightens the potential for runs, particularly when nonbank platforms lack access to lender-of-last-resort facilities. Regulators face a trade-off between fostering innovation and ensuring depositor protection; research from the Bank for International Settlements and the International Monetary Fund recommends adapting deposit insurance, expanding access to central-bank backstops where appropriate, and improving data-sharing and conduct rules to reduce contagion risk.
Human and cultural factors matter: trust in incumbent banks, the role of cash in local economies, and platform preferences vary across territories, affecting how quickly deposits move. Environmental and territorial nuances include reduced branch networks in rural areas, which can weaken local economic ties when deposits shift to distant platforms, and differing resilience based on national infrastructure. Policymakers and banks must therefore combine prudential measures with user-centered design and local engagement to preserve deposit stability while harnessing the benefits of fintech.