Yes, the title of this post is correct. There are certain incomes which ARE NOT taxable. Read below the 411 the IRS sent out.
The IRS offers the following list of items that do not have to be included as taxable income:
Adoption expense reimbursements for qualifying expenses
Child support payments
Gifts, bequests and inheritances
Workers' compensation benefits (some exceptions may apply; see Publication 525, Taxable and Nontaxable Income)
Meals and lodging for the convenience of your employer
Compensatory damages awarded for physical injury or physical sickness
Welfare benefits
Cash rebates from a dealer or manufacturer