Personal Income Taxes in Developing Countries

Comparative work on income taxes in developing countries hascommonly looked at average tax rates. These rates are oftenconstructed by dividing revenue collections by some measureof private or personal income. Recent controversies have, however,focused on the incentive effects of marginal tax rates. Thisarticle develops and applies a simple methodology to comparemarginal official tax rates across a sample of fifty developingcountries. As would be expected given differences in fiscalcapacity, the poorest and the lower-middle-income countriesimpose relatively low marginal rates, and the rates for theupper-middle-income and developed countries are higher. Conversely,several low-and lower-middle-income countries' tax thresholdsstart at income levels which are low relative to their meanincome when compared with those of developed countries. Theresults warn against trying to derive information on the disincentiveeffect of a country's tax schedule from the highest marginalrate; our data show that this is not an accurate indicator ofoverall disincentive effects.