The measures taken to prevent the spread of the Covid-19 pandemic in 2020 had a devastating effect on the economy and labor markets. While the quarantine measures taken on a global scale reduced both the movement and economic activities of individuals, the interruption of the production processes of companies significantly slowed down economic activity. These wide-ranging changes in the economy have affected the labor demand of firms on the one hand and the ability and willingness of workers to work on the other. Due to the measures taken, sharp decreases were experienced in both domestic and foreign demand, and many sectors were adversely affected. The decrease in firms’ incomes, along with the decrease in demand, had profound effects on employment. Turkey implemented quarantine measures after the first case was detected in March 2020. What has been the loss of working hours due to the pandemic in Turkey in 2020, especially in the private sector? The aim of this study is to try to show statistically how the distribution of employees registered to SSI belonging to all NACE codes from 01 to 99 according to the size of the firm changes in “actual working hours per week at the main job during the reference week”. For this, the Household Workforce microdata of the Turkish Statistical Institute for the years 2014 – 2020 was used.