Capital Accumulation

Capital accumulation is the process of increasing the stock of capital goods—such as machinery, equipment, infrastructure, and buildings—in an economy through investment. It is a fundamental driver of economic growth and productivity, and a central concept in classical, Marxist, and modern growth economics.

Definition

Capital accumulation refers to the growth in the stock of capital, resulting from investment that exceeds depreciation. In economic theory, it is the process by which an economy adds to its productive capacity, enabling higher levels of output and income in the future.

Sources

Capital accumulation is financed by saving: the portion of income not consumed. Saving is channelled into investment through financial markets and institutions. Other sources include foreign investment and, in some models, the reinvestment of profits by firms.

Role in growth

In the Solow–Swan model, capital accumulation raises output but is subject to diminishing returns, so that sustained growth ultimately depends on technological progress. Growth-accounting decomposition typically attributes part of growth to capital accumulation and part to increases in labour and total factor productivity.

Perspective	View of capital accumulation
Classical economics	A key driver of growth and wealth.
Marxist economics	Central to capital dynamics and the accumulation of surplus.
Solow growth model	Contributes to growth but is subject to diminishing returns.
Endogenous growth theory	Capital accumulation interacts with technology and knowledge.

See also

• Human Capital
• Total Factor Productivity
• Economic growth
• Development Economics