In the third quarter of 2025, murabaha (cost-plus-profit sale financing contract) and commodity murabaha accounted for 78.7% of global Islamic financing, while profit-and-loss sharing contracts remained residual (IFSB, 2026). Half a century after the first institutions appeared, the principle presented as the foundation of Islamic finance is not its practice. This paper asks why, and what institutional architecture could remedy it. It locates the origin of the phenomenon upstream of the balance sheet, in the choice of institutional vehicle: modern Islamic finance took shape by adopting the commercial bank as its form, together with the liabilities that define it, which imposed a funding structure incompatible with risk sharing on the asset side. This constraint is a special case of a more general impossibility, formulated here as the trilemma of Islamic intermediation: no institution can simultaneously issue liabilities convertible at par on demand, hold assets in genuine profit-and-loss sharing, and operate without an external loss absorber. The proposition draws on the monetary theory of information insensitivity. Normative assessment proceeds through Ibn Ashur’s maqasid al-mal, crossed with Ahmed’s typology and applied to the pairing a contract forms with the architecture that houses it. It yields a result the paper does not exempt its own proposals from: musharaka, a Shariah-based contract, produces a Shariah-compliant outcome once housed within an unchanged liability architecture. The paper proposes a three-tier architecture and establishes, through the alpha factor, that the prudential lock barring this transition is the endogenous sanction of mimicry and loosens under existing rules.

This paper argues that the contemporary paradox of Islamic finance is not primarily a doctrinal failure, nor the result of insufficient demand, but rather the consequence of uneven institutional capacity across jurisdictions. Despite strong normative appeal, sustained sectoral growth, and the expansion of Islamic finance across more than 140 countries, the industry remains unevenly institutionalized, geographically concentrated, and operationally fragmented. To explain this gap, the paper develops an institutional capacity framework structured around three dimensions: normative coherence, institutional credibility, and operational capacity. It shows that Islamic finance requires not only Shariah-compliant products, but also harmonized and intelligible standards, credible governance mechanisms, transparent Shariah supervision, effective audit structures, professional expertise, market infrastructure, and deep ecosystems. By applying this framework to current debates on standardization, Shariah governance, perceived authenticity, market depth, and ecosystem development, the paper suggests that the future of Islamic finance depends on its ability to transform Shariah principles into coherent standards, credible institutions, and operationally robust markets.