This article proposes an alternative sociological framework for dealing with the imaginary constitution of financial crises. Theorisation of financial crises is often limited by dualistic juxtaposition of the rational and irrational, moral and immoral, calculative and intuitive, thus neglecting the imaginary structuring of such dyads in the construction of financial and fiscal realities. To address this lacuna, we introduce ideas from philosopher Cornelius Castoriadis, and develop a framework that unpicks the often-suppressed, mediating and generative role of imagination in finance. On the one hand, we show how dominant forms of imagination enable the financialisation of contemporary societies, serving to sustain existing debt practices and lender–debtor relationships. On the other hand, we propose a re-animated ‘sociological imagination’ that offers potential avenues for establishing alternative social visions of the future that will enable re-thinking of the nature of debt, money and financial institutions.