Global digital-only benchmarks (31-35%) and Singapore's overall cost-to-income of 42% suggest digital channels can undercut full-service banks by 10-20 percentage points.

Current State of Singapore's Banking Cost Efficiency

Singapore's banking sector has maintained a relatively lean cost structure compared to global peers, but the headline ratio masks the efficiency gap between legacy branch networks and emerging digital-only channels. The World Bank's Global Financial Development Database shows Singapore's aggregate bank cost-to-income ratio stood at 45.36% in 2021, up from a recent low of 40.38% in 2018 and 40.51% in 2019. The five-year trajectory—41.7% (2017), 40.4% (2018), 40.5% (2019), 42.1% (2020), 45.4% (2021)—reflects pandemic-related revenue compression and elevated provisioning costs that widened the ratio by nearly five percentage points from the 2018 trough.

PwC's 2019 Banking Review, the most recent cross-jurisdictional benchmark available, placed Singapore's aggregate cost-to-income ratio at 42%, outperforming Australia (46%) and the United Kingdom (57%). The PwC analysis attributed Singapore's relative efficiency to disciplined cost management and early returns from digitalisation investments, noting that Singapore banks' three-year average income growth of 7% outpaced both UK and Australian peers. However, this aggregate figure includes the full operational footprint of incumbent banks such as DBS, OCBC, and UOB, which collectively maintain hundreds of physical branches across the city-state.

Digital-Only Banking: Structural Cost Advantages

Digital-only banks operate without physical branches, relying entirely on mobile apps and web platforms to acquire, serve, and retain customers. This structural difference eliminates three major cost lines that weigh on traditional banks: branch rent (substantial in Singapore's expensive commercial property market), branch staffing, and the maintenance of legacy IT systems. Five MAS-regulated digital banks now operate in Singapore: GXS Bank (a joint venture between Singtel and Grab), MariBank (Sea Limited), Trust Bank (Standard Chartered International and FairPrice Group), ANEXT Bank (Ant Financial), and Green Link Digital Bank (Greenland Financial Holdings). All five offer zero or low monthly account fees, no minimum balance requirements, and fully online account opening via Singpass (Statrys, Airwallex).

Digital banks also benefit from modern, cloud-native IT infrastructure that requires lower ongoing maintenance expenditure than the mainframe and on-premise systems still prevalent at incumbents. Simon-Kucher notes that digital banks, "unencumbered by legacy IT systems, can innovate products and enhance the banking experience more rapidly," while their "modern IT infrastructure and absence of costly branch networks allow them to operate at lower costs." These structural advantages translate directly into cost-income ratios that full-service banks cannot match without significant branch rationalisation.

Global evidence confirms the magnitude of the advantage. WeBank, China's leading digital-only bank, reduced its cost-to-income ratio from 35% in 2021 to 31% in 2022, according to TabInsights' global digital bank profitability survey. At 31%, WeBank operates at roughly 14 percentage points below Singapore's aggregate 2021 ratio of 45.4%, and at least 20 points below the 50-60% range typical of full-service branch networks in developed markets.

Industry Benchmarks and Structural Advantages

Singapore's overall banking cost-income ratio of 42% (2019) is already 4 percentage points below Australia's 46% and 15 points below the UK's 57%, according to PwC. Yet digital-only banks globally achieve 31-35% ratios, outperforming traditional peers by more than 10 percentage points. Full-service branch networks in developed markets typically run at 50-60% cost-to-income due to branch rent, staffing, and compliance costs—a range implied by the UK and Australia figures and consistent with industry norms cited in banking surveys.

Singapore's digital banks have additional optimization levers. Simon-Kucher highlights that digital banks can integrate into broader ecosystem platforms—messaging (Grab's super-app), e-commerce (Sea Limited's Shopee), and retail (FairPrice Group)—to lower customer acquisition costs and increase engagement frequency. Automated lending underpinned by real-time transaction monitoring allows digital banks to assess MSME creditworthiness without the manual underwriting overhead that incumbents require. These advantages compound over time as data accumulates and algorithms improve.

Cost-to-Income Ratio (%) (%)Source: Orionmano Industries

The chart illustrates the structural gap: Singapore's aggregate ratio, while competitive, remains 11 points above a leading digital-only benchmark. For Singapore's digital banks to converge toward the 28-35% range as they scale deposits and lending—which industry analysts consider achievable given their zero-branch cost base and modern IT stacks—would require sustained deposit growth and lending book expansion to improve the revenue denominator. The current pricing strategy of zero fees and no minimum balances constrains non-interest income, placing pressure on achieving profitability through scale alone.

Outlook

As Singapore's five digital banks mature beyond the initial account-opening phase and begin competing seriously for lending and deposit market share, cost-income ratios could settle in the 28-35% range within five to seven years, based on the WeBank trajectory. This outcome would force full-service competitors to accelerate branch rationalisation and digital transformation plans already underway. Incumbent banks face a dual challenge: defending their retail deposit base against zero-fee digital alternatives, and reducing their own cost structures without alienating customers who continue to use branches for high-value transactions.

The direction of travel is clear. Digital-only channels in Singapore already operate at cost-income ratios below 40%, compared to the 50-60% range that prevails for full-service branch networks. The question is not whether Singapore's aggregate banking cost-income ratio will fall, but how quickly incumbents can close the gap—and whether the digital-only entrants can scale their revenue base fast enough to turn structural cost advantages into sustainable profitability.