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.

It can be expressed as:

NNI = C + I + G + (NX) + net foreign factor income + indirect taxes - depreciation

where:

• C = Consumption
• I = Investments
• G = Government spending
• NX = net exports (exports minus imports)

This formula uses the expediture method of national income accounting.