Exploring a negative income tax for South Africa: impacts on income inequality and poverty

Abstract

This paper explores the potential of a negative income tax to tackle South Africa’s dual challenges of poverty and income inequality. Using a static, arithmetic microsimulation model with NIDS Wave 4 as the base dataset, we simulate a negative income tax in which recipients receive an income subsidy proportional to their income if it is below a set amount and a guaranteed subsidy if they have zero income. Two different sizes for the guaranteed subsidy are simulated, both pegged to recent poverty lines. The simulations show that the negative income tax significantly reduces both inequality and poverty levels, but that this necessarily comes at a high cost.