While the Central Statistics Office (CSO) does not estimate the overall size of the black economy in Ireland, it does endeavour to ensure that any incomes earned in the black economy are captured in the gross domestic product. When necessary, the basic data on incomes are adjusted upwards to incorporate estimates for hidden economic activity. An example is the adjustment made for non-reporting and under-recording of incomes by self-employed traders where the basic data on incomes are derived from the tax collection system. These incomes are grossed using factors calculated by comparing the numbers of self-employed recorded in the census of population and labour force surveys with the numbers making tax returns. This and the other quantifiable adjustments made to the national accounts for black economy activity amount to about three and a half per cent of GDP at present.
Income earned from black economy activities is also indirectly captured in other components of the GDP but the amounts involved cannot be separated and quantified. For instance, the labour supply approach used to estimate wages and salaries will capture earnings not reported to the tax authorities but the estimation procedures do not separately distinguish these amounts. Also, income from agriculture is measured indirectly using the so-called output approach and is not dependent on the tax declarations of farmers.
The CSO will continue its efforts to improve the coverage of the black economy in the Irish National Accounts although such activity, is of its very nature, difficult to estimate.