THE DETERMINATION OF EQUILIBRIUM NATIONAL INCOME

National income is said to be in equilibrium when there is no tendency for it either to increase or for it to decrease.  The actual National Income achieved at that point is referred to as the equilibrium National Income.

For there to be equilibrium, firm spending must be equal to firm's receipts.  If this were not the case, the firms will receive less and lose money until there is no more money in the system.  Hence, for there to be equilibrium:

 Factor Incomes = Consumer Spending