How much of a repair bill is labor and how much is parts?

In the 2017 Economic Census, auto glass replacement shops took 34.2% of their repair revenue from labor charges and 65.8% from parts installed, well below the 51.0% labor share of all auto repair shops (U.S. Census Bureau, national, 6,026 shops).

Where auto glass replacement shops get their repair revenue, 2017: labor charges versus parts installed. Labor charges: 34.2%; Parts installed: 65.8%.

Source: U.S. Census Bureau, 2017 Economic Census, Other Services, revenue from labor charges and parts installed (EC1781LABOR) · file downloaded 2017 data, published 2021