Longman Dictionary of Contemporary English
discretionary income
noun
EXAMPLES FROM CORPUS
▪ As discretionary income moves from the young to the old, advertising will follow it.
▪ I had a party today and used the discretionary income for it as a token of my approval.
▪ They have a lot of flexible time and a lot have discretionary income.
Usage examples of "discretionary income".
We have some discretionary income in our budget and we know how starved the Tran are for metal.
The local residents were, for the most part, poor, with little or no discretionary income, and even if The Store paid only minimum wage, the overhead for a place like this had to be at least double the most optimistic sales projections.
And grown men, young and old, well-off and not so well-off, still devoted a substantial portion of their free time and discretionary income to the pursuit.
The relative brightness of the strip of Mill Road leading out of town was the product of that era when stocks went go-go and gas was still cheap and nobody had heard the term 'discretionary income' because they had plenty of it.