You need to calculate the tax free yield on the municipal and then compare it to the 8% stated yield on the corporate bond.

你需要计算的税收市级和8%的人表示对企业债券的收益率比较自由产量。

youdao

Because the life insurance company we used for this analysis has the highest financial strength ratings, our comparison was made with top rated tax-free bond yields.

FORBES: Life's Tax Advantages

You can use money that you borrow in order to calculate the deduction but you cannot claim a deduction or credit based on expenses paid with tax-free scholarship, fellowship, grant, or education savings account funds such as a Coverdell education savings account, tax-free savings bond interest or employer-provided education assistance.

FORBES: Back to School: Tuition and Fees Deduction

Banks and advisors have been hawking muni bonds as the next-to-last safe haven, just a notch below Treasuries but with much better yields: as much as 7% tax-free in some muni-bond mutual funds.

FORBES: Muni Bonds: Panacea or Pandora's Box?