Interest Income by Quintile

Didn't have to pull too many teeth to find this PDF from the BLS. (Data for 2009.)

Under "sources of income" the PDF includes "Interest, dividends, rental income, other property income" for "All consumer units" and by quintile.

Under "Consumer unit characteristics" the PDF provides the total income before taxes for each quintile.

I took a look at the ratios of those numbers:

Graph #1

Here's the spreadsheet.

Considering interest, dividends, rental income, and other property income as returns to various forms of saving, I am calling the total "interest income" and using it as a proxy to estimate various forms of savings by income quintile. For what it's worth.