4. Savingis the portion of an economic unit's current income that it does not spend to meet current needs. Saving by the private sector, called private saving, equals private disposable income minus consumption. Government saving, which is the same as the government budget surplus, equals the government's net income minus its purchases of goods and services; equivalently, government saving equals government revenue minus government spending. National saving is the sum of private saving and government saving; it equals GDP plus net factor payments from abroad minus consumption and government purchases.