Intermediate goods or producer goods or semi-finished products are goods, such as partly finished goods, used as inputs in the production of other goods including final goods. A firm may make and then use intermediate goods, or make and then sell, or buy then use them. In the production process, intermediate goods either become part of the final product, or are changed beyond recognition in the process.
Intermediate goods are not counted in a country's GDP, as that would mean double counting, as the final product only should be counted, and the value of the intermediate good is included in the value of the final good.
The use of the term "intermediate goods" can be slightly misleading, since in advanced economies about half of the value of intermediate inputs consist of services.