Fiscal Risk Constitutionalism: Constitutional Adjudication and the Allocation of Fiscal Risk in Fiscally Dense Democracies

Fiscal risk constitutionalism names an institutional function of apex courts that classical constitutional theory has left systematically undertheorized in its fiscal dimension: the function through which supreme courts govern the temporal distribution of fiscal exposure — determining if and when contested liabilities crystallize, who absorbs economic losses, how far the cost of constitutional correction will travel, and whether disruption will strike the present, be deferred into the future, or be redistributed across both. This function is analytically distinct from the income-redistributive decisions that constitutional theory has traditionally examined. It operates not through the substantive content of constitutional rulings but through their temporal architecture — through doctrines governing retroactivity, modulation of effects, protection of consolidated legal situations, and procedural sequencing. In large-scale fiscal disputes involving liabilities of macroeconomic significance, it is among the most consequential functions apex courts perform. Drawing on a complete decisional corpus of 2,927,525 rulings of the Brazilian Supreme Federal Court (2000–2026) as a magnified analytical laboratory, and situating the analysis within a broader comparative framework, the article develops a theory of supreme courts as the central banks of fiscal risk within contemporary fiscal states.