From Wiktionary, the free dictionary
From non- + wage.
nonwage (not comparable)
- Not of or pertaining to a wage.
2007 May 5, David Cay Johnston, “Surprising Finding in Capital Gains Study”, in New York Times[1]:The I.R.S. has told Congress that it taxes 99 percent of wage income, but only about 70 percent of nonwage income.