Net national income (NNI) is an economics term used in national income accounting. It can be defined as the net national product (NNP) minus indirect taxes. Net national income encompasses the income of households, businesses, and the government.
It can be expressed as:
NNI = C + I + G + (NX) + net foreign factor income - indirect taxes - manufactured capital depreciation
where:
C = Consumption
I = Investments
G = Government spending
NX = net exports (exports minus imports)