DBS, OCBC, and UOB collectively hold over 80% of retail banking deposits in Singapore, cementing a dominance that international lenders have chipped at only at the margins.

The Concentration Thesis

The Singapore retail banking market remains one of Asia’s most concentrated, with the three local banking groups—DBS, OCBC, and UOB—capturing an estimated 80–85% of domestic retail deposits. DBS alone accounts for approximately 29–31% of the market, according to industry estimates, making it the clear leader by both deposit share and total assets. OCBC holds roughly 23–25%, and UOB completes the trio with approximately 22–24%. Together, the three banks have maintained this commanding position for over a decade, with the four largest banks in total capturing 81% of consumers, according to the ResearchAndMarkets.com “Singapore Retail Banking: Competitor Benchmarking” report published in June 2025.

This concentration is not merely a function of inertia. The Big Three benefit from deep customer relationships, extensive branch networks, and dominance across high-value products such as premium accounts, investments, and insurance. The market’s high proportion of mass affluent consumers—a demographic that tends to concentrate deposits and multi-product relationships at a primary bank—reinforces the incumbents’ advantage.

Deposit Growth Dynamics

Even as net interest margins contracted in 2025—DBS’s NIM fell 9 basis points quarter-on-quarter to 1.96% in 3Q25, while OCBC and UOB dropped to 1.84% and 1.82%, respectively—deposit growth remained robust across all three lenders. DBS posted 4% sequential and 9% year-on-year deposit growth in 3Q25, with its CASA (current account, savings account) ratio at 53.4%. OCBC’s deposits grew 1% quarter-on-quarter and 11% year-on-year, with a CASA ratio of 50.3%. UOB reported 4% sequential and 5% year-on-year deposit growth, with the highest CASA ratio of the three at 57.9%.

The strength of deposit inflows has allowed DBS to record growth in net interest income even as rates fell—the only bank among the three to achieve a full-year increase, with FY2025 net interest income rising 0.5% to S$14.5 billion. UOB and OCBC posted declines of 3.3% and 6.2%, respectively, according to their FY2025 financial results.

Percent (%)Source: Orionmano Industries

Competitive Pressure from International Banks

Despite the Big Three’s aggregate deposit share, the competitive landscape is not static. International banks such as HSBC and Citibank have managed to gain market share from local banks in mortgages, loans, credit cards, and deposits, according to the ResearchAndMarkets report. This suggests that foreign players have been able to offer more attractive product bundles, particularly in the credit and transactional banking space. Digital-only entrants—including GXS Bank and Trust Bank, the latter a joint venture between Standard Chartered and FairPrice Group—have also added pressure at the lower end of the deposit pyramid.

However, the international banks have not dislodged the local giants in core deposit relationships. DBS serves over 4 million retail customers in Singapore across 18 markets, while OCBC and UOB each maintain multi-million retail customer bases. Switching costs remain high, reinforced by integrated mortgage, insurance, and wealth management offerings.

Fee Income as a Diversification Strategy

The Big Three have increasingly leaned on fee-based revenue to offset net interest margin compression. Net fee and commission income posted double-digit year-on-year growth in FY2025: OCBC led with a 22.4% increase to S$2.411 billion, followed by DBS at 17.5% to S$4.898 billion, and UOB at 7.3% to S$2.569 billion. Wealth management fees were a particularly strong tailwind, with DBS reporting record wealth management fee income and record treasury customer sales in 3Q25, while OCBC similarly saw record wealth management fees.

Valuation and Investor Positioning

The banks command divergent valuations that reflect their respective market positions. As of 13 January 2026, DBS traded at a price-to-book ratio of 2.39x, OCBC at 1.49x, and UOB at 1.19x. Forward P/E stood at 14.47x for DBS, 11.92x for OCBC, and 10.67x for UOB. Analysts broadly view DBS and OCBC as ‘buy’ opportunities, while UOB attracts a ‘hold’ rating, according to consensus data compiled by IG as of November 2025 and by StashAway as of January 2026.

Dividend yields remain a key draw for income-oriented investors: UOB offers the highest yield at 6.65% for 2025, while DBS and OCBC yield 5.18% and 5.24%, respectively. OCBC has formally raised its payout ratio target to 60%, signaling greater confidence in capital returns.

Outlook

The Big Three’s deposit dominance is unlikely to erode materially in the near term. The banks benefit from the Monetary Authority of Singapore’s regulatory framework, which imposes higher capital requirements on foreign branches. Meanwhile, the shift toward fee income—particularly wealth management—provides a buffer against further rate normalisation. The key risk is not that international banks will capture deposit share in aggregate, but that they will continue to peel off higher-value segments such as affluent credit card and mortgage customers, compressing margins at the margin.

In a low-growth, high-concentration market, the competitive battle is shifting from volume to value—and the Big Three remain firmly in control.