That means saving a portion of your income, no matter what it is.
During this time he gave away what was described as 'a large portion' of his own income.
Many poor people pay a much higher portion of their income as rent.
Tourism also provides a significant portion of the city's income.
Any student who makes above that threshold must pay back a portion of his income to the government.
So, as a group, the portion of their income going to taxes rose.
The poor would then have a greater portion of their income restored to them than the rich.
Each month, the mortgage we pay is a relatively small portion of our total income.
I think a significant portion of their income does come from licensing these days, but they are a government body.
Wealthy people simply spend a smaller portion of their income than others do.