I don’t know if this is the geography or the attribute you are looking for,  but ACS (Year Estimates 2012 to 2016) has table

B19301_001 with block group and tract data for per capita income - (column FP) PER CAPITA INCOME IN THE PAST 12 MONTHS (IN 2016 INFLATION-ADJUSTED DOLLARS) for Total Population Per capita income in the past 12 months (in 2016  inflation adjusted dollars)

You could cross reference with B08301_018 and 019 also at BG and Tract – bike and walk to work table (Means of Transportation to Work)

Lynn Dupont

From: ctpp-news [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Rob Case
Sent: Thursday, May 17, 2018 2:07 PM
To: CTPP post; TMIP Submittals (TMIP-L@listserv.tmiponline.org)
Cc: Uros Jovanovic
Subject: [CTPP] personal income of persons-who-bike-to-work

We’re looking for PERSONAL income (not HOUSEHOLD income) of persons who bike to work.

NHTS and Census apparently only have household income.

Any idea where to look for this?

Rob Case