Net national income (NNI) reflects the total income earned by a nation’s residents and businesses, after accounting for the depreciation of fixed capital assets.
It is calculated by subtracting the consumption of fixed capital—such as dwellings, buildings, machinery, transport equipment, and infrastructure—from gross national income. This provides a clearer measure of sustainable income. While NNI is available in various formats (e.g. in US dollars, per capita, growth rates), index measures allow for international comparison and benchmarking.
The indicator is presented as an index, with 2020 as the reference year.