Until the COVID-19 induced migration crisis of 2020 highlighted the sheer scale of migration in the country, migrant workers in India’s cities had largely been invisible. One fundamental reason that migrants were, and continue to remain invisible, particularly to policy makers, is that there are no accurate estimates of the extent of migration in India. Official data sources such as the Census, the National Sample Survey (NSS) and the Periodic Labour Force Survey (PLFS) are not designed to appropriately capture migration as the focus of the Census is on population distribution, while NSS and PLFS data are concerned with labour market attributes. These surveys massively undercount migrants and underestimate migration in the country, specifically short-term and circular migration.