other tax free income

基本解釋

Millions of Americans — and friends in many other countries — have dedicated themselves to the principles of liberty: to free enterprise, limited government, sound money, no income tax, and peace.
以百萬計的美國人-和朋友，在許多其他國家-都投身原則的自由：自由企業(yè)，有限政府，健全的錢，沒有所得稅，與和平。

There are many other potential problems associated with municipal bonds, including interest rate risk, and although they are federally tax-free, other state and local taxes may apply and interest income may be subject to the alternative minimum tax.
FORBES: Muni Bonds: Panacea or Pandora's Box?
This is because the interest from munis is generally income tax free, as it is not with the other class of bonds.
FORBES: What Is This Nonsense That Warren Buffett Is Spouting About Taxes On Investment?
Other things like that, tax-free accounts with no minimum balances that make it very easy for lower-income households to save, whereas our banks tend to either chase away or fleece low-income households.
NPR: All I Want For Christmas: Less Debt?