Surplus value

Topic: Schools of Economic Thought and Economic Laws · NCERT: Beyond NCERT

Meaning

Surplus value is the extra value a worker creates beyond the value of their own wage. In Marx's theory, the capitalist keeps this extra value as profit [2].

It matters because Marx built his whole idea of exploitation on this gap. Much of Das Kapital works out this idea and what it means for capitalism [1].

• Value of a good = c + v + s
• c = constant capital (machines and raw materials)
• v = variable capital (wages)

• s = surplus value

• Rate of surplus value (rate of exploitation) = s / v

• Rate of profit = s / (c + v)

Explanation

How surplus value arises

• The starting point is the labour theory of value. This is the idea that the value of a good depends on the amount of labour used to make it. Marx took this idea from David Ricardo [3].
• Marx added a subsistence theory of wages. The wage is only enough to keep the worker alive and able to work [3].
• Where the gap comes from:
• the capitalist buys the worker's ability to work for a full day
• → the worker creates more value in that day than the wage is worth

• → the capitalist keeps the difference as profit.

• Why Marx called this exploitation: the worker produces all the new value but receives only part of it. The gap is what Marx meant by exploitation [2].

Necessary labour and surplus labour

• Necessary labour is the part of the working day in which the worker creates value equal to their own wage.
• Surplus labour is the rest of the day. All value created in this time is surplus value.
• Worked example:
• A worker works 8 hours a day. They create ₹200 of new value each hour, so ₹1,600 a day.
• The wage is ₹800. The worker "earns" this in the first 4 hours. This is necessary labour.
• The other 4 hours are surplus labour, so s = ₹800.
• Rate of surplus value = 800 / 800 = 100%.

• Suppose the machines and materials used up (c) are worth ₹2,400. Then the rate of profit = 800 / (2,400 + 800) = 25%.

• The same surplus value gives two different rates:

• The rate of surplus value compares s with wages only.
• The rate of profit compares s with all the capital used, including machines.

Constant capital and variable capital

• Constant capital (c) means machines and raw materials. They pass their own value on to the product, but they add no new value.
• Variable capital (v) means the money spent on wages. It is called "variable" because labour is the only input that creates more value than it costs.
• So, for Marx, only labour creates surplus value.

What makes surplus value rise or fall

• A longer working day with the same wage:
• surplus labour time goes up

• → surplus value goes up.

• Wages held down by the reserve army of labour. This is the pool of unemployed and underemployed workers.

• many jobless people are ready to work
• → employed workers can easily be replaced

• → wages stay close to subsistence, and surplus value stays high.

• Machines replacing workers (the falling rate of profit):

• competition pushes firms to use more c and relatively less v
• → only v creates surplus value
• → profit per rupee invested tends to fall.

• Example: v = 100 and s = 100. If c rises from 200 to 600, the profit rate falls from 100/300 (33%) to 100/700 (about 14%).

• The overproduction crisis:

• capitalists keep surplus value high by paying low wages
• → workers cannot buy everything they produce
• → unsold goods pile up
• → a slump follows.

In India

Surplus value is a theory concept, so no Indian body measures it. But the idea shaped India's economic thinking, and you can see its logic in India's labour market today.

• Why it matters for India's history: Marx's critique of capitalism, built on surplus value, inspired socialist thought. That thought influenced Nehru. However, India did not remove private property or wage labour. It chose a mixed economy, where the public and private sectors work side by side.
• Nehru rejected the Soviet model, "where all the means of production… were owned by the government" (Class 11, Indian Economy 1950–1990).

• So, in Marx's terms, surplus value is still created in India's private firms.

• An Indian example of the idea:

• A factory worker in India has many informal and underemployed workers ready to replace them. This is a reserve army of labour.
• → their bargaining power is weak, and the wage stays low
• → the gap between the value they produce and the wage they get stays wide.

• Marxists use this logic to explain jobless growth, informal work and a low wage share (the share of national income that goes to workers as wages) in India.

• In the Constitution: the word "Socialist" was added to the Preamble by the 42nd Amendment (1976) [4][5]. Today it is read as a welfare-state goal, not as the state taking over all production.

Don't confuse with

• Rate of profit vs rate of surplus value: the rate of surplus value is s / v (surplus value compared with wages only). The rate of profit is s / (c + v) (compared with all the capital used). The same s gives a lower profit rate because c is also counted.
• Labour theory of value: this idea (value depends on labour) came from Ricardo [3]. Surplus value is Marx's own addition: labour creates more value than it is paid.
• Constant capital (c) vs variable capital (v): c is machines and materials, which pass on their value but add none. v is wages, the only source of surplus value.
• Consumer or producer surplus: these are mainstream market ideas about the gap between a price and what a buyer is willing to pay (or a seller is willing to accept). They are not about class exploitation.

Prelims Hooks

• Surplus value = the value a worker creates minus wages. The capitalist keeps it [2].
• Formulas: Value = c + v + s. Rate of surplus value (rate of exploitation) = s/v. Rate of profit = s/(c + v).
• Trap: constant capital (c) adds no new value. For Marx, only labour (v) creates surplus value.
• Marx took the labour theory of value from Ricardo and added a subsistence theory of wages [3].
• Das Kapital is where the idea is worked out. Vol. I: 1867, published in Berlin. Vols. II (1885) and III (1894) were edited by Engels after Marx died [1]. The Communist Manifesto (1848) is a separate, shorter work.
• Reserve army of labour = the unemployed and underemployed, who keep wages near subsistence. It is not a military term.

Mains Points

• Is Marx's idea still relevant?
• The reserve army and low wages help explain jobless growth, informal work and a low wage share in India.
• Low wages mean weak demand. This links to Keynes's idea of deficient demand.
• But poverty has fallen under market reforms. This weakens Marx's prediction that workers would keep getting poorer.

• Use this in GS-III answers on inclusive growth and employment.

• Automation and the falling rate of profit:

• Marx argued that replacing workers with machines lowers the rate of profit and adds to the reserve army.

• This gives a lens for today's debates on automation, capital-intensive growth and labour-intensive manufacturing in India.

• India's middle path:

• India accepted wage labour and private profit, so surplus value still arises.
• To soften inequality, it chose a mixed economy, a "socialistic pattern of society" (Avadi session, 1955) and welfare goals under the Directive Principles (Articles 38–39).
• It did not choose state ownership of everything. This is useful in GS-II and GS-III answers on the role of the state.

Related concepts

• Marxian economics
• Historical materialism
• Class struggle
• Reserve army of labour
• Fabian socialism
• Democratic socialism
• Market socialism
• State capitalism

Read more

• Marx and the socialist traditions