Socially Necessary Labour Time

Socially Necessary Labour Time

Marx’s original definition appears in Capital, Volume I, Chapter 1, Section 1:

“Socially necessary labour-time is the labour-time required to produce any use-value under the conditions of production normal for a given society and with the average degree of skill and intensity of labour prevalent in that society.”

“What exclusively determines the magnitude of the value of any article is therefore the amount of labour socially necessary, or the labour-time socially necessary for its production."

"Normal conditions” and “average skill”

• Normal conditions of production: the prevailing tools, technology, and methods in a given society at a given time. Not the best, not the worst. The typical.
• Average skill: the ordinary level of competence among producers. Not the 10x engineer, not the intern.
• Average intensity: the normal pace of work. Not too chill, not frantic.
• Why “average”: value is set socially, not individually. If one producer is faster or slower than the norm, that does not change the value. The market does not pay extra for inefficiency.
• Why “given society at a given time”: the average shifts as tools and skills change. A chair’s SNLT today is not its SNLT in 1800.
• The point: SNLT is a social average, not a personal one. It is what the good costs in labour under normal conditions, which is why it anchors the exchange ratio rather than fluctuating with each producer’s pace.