This paper presents FIR-GEM: Fiscal IRish General Equilibrium Model. FIR-GEM is a small open economy DSGE model designed as …scal toolkit for …scal policy analysis in Ireland. To illustrate the model's potential for …scal policy analysis, we conduct three types of experiments. First, we analyse the …scal transmission mechanism through which Irish …scal policy a¤ects the Irish economy. Second, we compute …scal multipliers for the main tax-spending instruments, namely government consumption, public investment, public wage bill, public transfers, consumption, labour and capital tax. We focus on a …scal policy stimulus that is either implemented through spending increases or tax cuts. Third, we perform robustness analysis on key structural characteristics that can a¤ect quantitatively the size of …scal multipliers. We …nd that the size of …scal multipliers in the Irish economy heavily depends on its degree of openness, the method of …scal …nancing employed, the elasticity of the sovereign risk premia to Irish debt dynamics and the ‡exibility of Irish labour and product markets.