In the U.S., the tax treatment of a non-qualified immediate annuity is that every payment is a combination of a return of principal (which part is not taxed) and income (which is taxed at ordinary income rates, not capital gain .). Immediate annuities funded as an IRA do not have any tax advantages, but typically the distribution satisfies the IRS RMD requirement and may satisfy the RMD requirement for other IRA accounts of the owner (see IRS Sec 1.401(a)(9)-6.)