The Urban Middle-Income Squeeze in Malaysia: A Conceptual Framework of Financial Strain, Behavioural Adaptation and Perceived Inequality

The financial well-being of urban middle-income households in developing economies is an urgent yet theoretically underexplored issue. In Malaysia, the Middle 40 percent (M40) group faces a middle-income squeeze, where wage growth has failed to keep pace with rising urban costs, leaving them ineligible for means-tested aid but lacking the financial resilience of higher income-earners. Existing research largely links financial vulnerability to absolute poverty among the Bottom 40 percent (B40), treating financial strain, financial behaviour, and perceived inequality as separate factors. This leaves the M40’s financial erosion conceptually disjointed and untested as a cohesive system. This paper fills that gap by proposing an integrated framework positioning financial well-being as shaped by strain and perceived inequality, with financial behaviour as a mediator and household size as a moderator. It draws on the Family Economic Stress Model, Relative Deprivation Theory, and the Life Cycle Hypothesis to explain how economic pressure, social comparison, and life-stage disruptions interact. By synthesising these three theoretical lenses the framework repositions financial well-being, rather than income or poverty status alone, as the central outcome of interest for Malaysia’s structurally underserved urban middle class, and offers a theoretically grounded and testable basis for future empirical validation and policy design.