Record non-interest income and cost discipline offset net interest margin compression, keeping operating efficiency near historical lows.

Singapore's three largest lenders—DBS Group Holdings, Oversea-Chinese Banking Corporation (OCBC), and United Overseas Bank (UOB)—maintained cost-to-income ratios within a 42–45% band in fiscal year 2025, as record fee income from wealth management and treasury activities absorbed the drag from a 14-to-29 basis point compression in net interest margins across the trio. The range implies a flat-to-modest improvement from the World Bank composite reading of 45.36% for Singapore's banking sector in 2021 (Sources 5, 6), reflecting structural efficiency gains from digitalization investments and branch rationalization even as top-line pressure from lower rates intensified.

Aggregate Cost-to-Income Ratio Holds at 42-45%

The collective cost-to-income ratio for DBS, OCBC, and UOB averaged 42–45% in FY2025, per industry data, anchored against the World Bank's 45.36% figure for the Singapore banking system in 2021 (Sources 1, 5, 6). The narrow band signals that operating expense discipline—underpinned by prolonged digitalization programs and a multi-year reduction in physical branch footprints—has held steady through a period of revenue mix disruption.

DBS, the largest of the three by total income, reported total income of SGD 14.6 billion in FY2025, up 1% year-on-year, while OCBC delivered a record total income of SGD 14.6 billion and UOB reported total income of SGD 13.8 billion, down 3% (Source 3). The International Monetary Fund's 2025 Article IV consultation on Singapore described the banking system as "well-capitalized" with a capital adequacy ratio of 18.9% as of Q1 2025, and "banks remain profitable" with strong liquidity positions (Source 7). The cost-to-income stability suggests that management teams have successfully contained operating expense growth even as revenue composition shifted away from net interest income toward fee-based earnings.

Non-Interest Income Surges to Record Levels

Fee and commission income across the three banks reached unprecedented levels in FY2025, acting as the primary offset to net interest margin compression.

DBS net fee income rose 18% year-on-year to a record SGD 4.90 billion, while treasury customer sales increased 14% to a new high of SGD 2.14 billion (Source 2). The bank's overall non-interest income grew 16% to SGD 5.5 billion (Source 3). OCBC's net fee income climbed 22% to SGD 2.4 billion, led by a 34% surge in wealth management fees, while insurance income from Great Eastern Holdings rose 17% to SGD 1.1 billion (Source 3). UOB's net fee and commission income reached a record SGD 2.6 billion, up 7% year-on-year, fueled by an 18% increase in wealth management fees and a 13% rise in loan-related fees (Source 3).

Growth Rate (%)Source: Orionmano Industries

DBS's annual report attributed the fee income strength to "growth in custody fees across both traditional securities and digital assets," as well as a 45% jump in investment banking fees to SGD 146 million and a 14% increase in loan-related fees to SGD 733 million (Source 2). OCBC's diversified model delivered insurance income growth via Great Eastern, while UOB's regional franchise supported wealth-fee expansion across Southeast Asia.

Net Interest Margin Compression Weighs on Interest Income

The revenue mix shift was necessitated by a sustained compression in net interest margins across all three banks. DBS's NIM compressed 29 basis points to 1.91%, driving a 6% decline in net interest income to SGD 9.2 billion (Source 3). OCBC's NIM declined to 1.80% in Q4 2025 (Source 4). UOB's NIM narrowed 14 basis points to 1.89%, contributing to a 3% dip in net interest income to SGD 9.4 billion (Source 3).

Loan growth remained positive but did not fully compensate for margin compression. DBS reported constant-currency customer loans of SGD 341.1 billion, up 9% year-on-year (Source 3). UOB's gross customer loans grew 4% to SGD 352.2 billion (Source 3). OCBC's loan growth was more modest, with Q4 2025 quarter-on-quarter expansion of 1.3% and year-on-year growth of 3.8%, as the bank deployed surplus deposits into higher-yielding assets (Source 4).

The margin headwinds stemmed from the normalization of interest rate cycles across developed markets, with Singapore's benchmark rates declining from 2024 peaks. Lower deposit repricing lags and competitive loan pricing compressed spreads, making the fee income surge structurally critical to maintaining overall profitability.

Digital and Wealth Capabilities Drive Structural Shift

The fee income acceleration reflects deliberate investment in digital wealth platforms and asset-gathering capabilities that are reshaping revenue composition beyond the interest rate cycle.

DBS reported higher custody fees from both traditional securities and digital assets, alongside increased cash management fees from payment activity and stronger client wallet share (Source 2). The bank's treasury customer sales hit a new high of SGD 2.14 billion, driven by capital flows within Asia and between Asia and the Gulf Cooperation Council (Source 2).

OCBC's wealth fees surged 34% year-on-year, while its insurance income from Great Eastern grew 17%, reflecting cross-sell synergies from its bancassurance model (Source 3). The broader digital wealth ecosystem in Singapore is expanding: digital wealth platform Syfe surpassed SGD 10 billion in assets under management in Q4 2025 and achieved group-wide profitability in the same quarter, indicating that digital-native investment platforms are scaling rapidly (Source 4).

UOB's record fee income was led by an 18% rise in wealth management fees, supported by its regional branch network and growing high-net-worth client base across ASEAN markets (Source 3). Analysts at UOB Kay Hian projected that DBS's wealth management fees would increase 44% year-on-year in Q4 2025, driven by buoyant equity market sentiment and continued AUM expansion, though with a mild 6% quarter-on-quarter seasonal pullback (Source 4).

The structural shift toward wealth management and digital asset servicing provides a durable offset to NIM headwinds, though the pace of further cost-to-income ratio improvement may moderate if cost discipline relaxes or credit provisions rise. UOB in FY2025 set aside SGD 2.0 billion in total allowances as a pre-emptive measure, a strategic decision that reduced net profit 23% to SGD 4.7 billion (Source 3). DBS and OCBC maintained exceptionally low non-performing loan ratios of 0.9% for seven consecutive quarters, signaling that asset quality remains robust even as macroeconomic uncertainty persists (Source 3). The collective trajectory points to fee-driven income growth as the primary lever for maintaining operational efficiency near historical lows, with the 42–45% cost-to-income band likely to persist absent a material deterioration in credit conditions.