Only final goods and services are counted in GDP, which avoids counting the same output:

1. The word final in the GDP definition does real work. 2. GDP is the value of all final goods and services produced within a country in a given year. 3. Intermediate goods are used up in making those final goods. 4. Counting both would count the same output more than once. _Source: OpenStax Principles of Macroeconomics for AP Courses 2e (CC BY 4.0), Ch 5 'The Macroeconomic Perspective'_