What is the difference between disposable income and discretionary income?

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May 2018

Disposable and discretionary income are two different measures used to analyze the amount of consumer spending. Both are key economic indicators used to gage the health of an economy.

Disposable Income

Disposable income is the amount of net income a household or individual has available to invest, save, or spend after income taxes. It's calculated by subtracting income taxes from income. For example, suppose a household has an income of $250,000 and it pays a 35% tax rate. The disposable income of the household is $162,500 ($250,000 - ($250,000*0.35)). Thus, the household has $162,500 to spend on necessities, luxuries, savings and investments.

Discretionary Income

On the other hand, discretionary income is the amount of income that a household or individual has to invest, save or spend after taxes and necessities are paid. Discretionary income is similar to disposable income because it's derived from it; however, there is one key difference. Disposable income does not take necessities into account. Necessities a household or individual may have are rent, clothing, food, bill payments, goods and services, and other typical expenses.

For example, suppose an individual has an income of $100,000 and pays a tax rate of 24%. The individual has transportation, rent, insurance, food and clothing expenses totaling $35,000 a year. His discretionary income is $41,000 ($100,000 - ($100,000*0.24) - $35,000) for the year.

Disposable income is higher than discretionary income within the same household because expenses of necessary items are not removed from the disposable income. Both measures can be used to project the amount of consumer spending. However, either measure must also take into account the willingness of people to make purchases.

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