In the clamour around the demonetisation of high-value Indian currency notes in 2016, a few questions were never asked: What is the black economy? Does it only include the illegal sector, i.e. drug trafficking and the like? How do we take into account illegal earnings from the legal sector, i.e. unreported or tax-evaded income? How do these illegal earnings contribute to consumption, and therefore money circulation? Do black profits slow down money circulation, or accelerate it? Macroeconomics of the Black Economy answers these questions and explains how we can factor in the entire gamut of illegalities when we study the economy as a whole.