A beneficiary can be any person or entity the owner chooses to receive the benefits of a retirement account or an IRA after he or she dies. Beneficiaries of a retirement account or traditional IRA must include in their gross income any taxable distributions they receive.
Inherited from spouse. If a traditional IRA is inherited from a spouse, the surviving spouse generally has the following three choices:
Treat it as his or her own IRA by designating himself or herself as the account owner.
Treat it as his or her own by rolling it over into a traditional IRA, or to the extent it is taxable,
a. Qualified employer plan,
b. Qualified employee annuity plan (section 403(a) plan),
c. Tax-sheltered annuity plan (section 403(b) plan),
d. Deferred compensation plan of a state or local government (section 457(b) plan), or
Treat himself or herself as the beneficiary rather than treating the IRA as his or her own.
If a surviving spouse receives a distribution from his or her deceased spouse's IRA, it can be rolled over into an IRA of the surviving spouse within the 60-day time limit, as long as the distribution is not a required distribution, even if the surviving spouse is not the sole beneficiary of his or her deceased spouse's IRA.
Inherited from someone other than spouse. If the inherited traditional IRA is from anyone other than a deceased spouse, the beneficiary cannot treat it as his or her own. This means that the beneficiary cannot make any contributions to the IRA or roll over any amounts into or out of the inherited IRA. However, the beneficiary can make a trustee-to-trustee transfer as long as the IRA into which amounts are being moved is set up and maintained in the name of the deceased IRA owner for the benefit of the beneficiary.
Like the original owner, the beneficiary generally will not owe tax on the assets in the IRA until he or she receives distributions from it.
Generally, the entire interest in a Roth IRA must be distributed by the end of the fifth calendar year after the year of the owner's death unless the interest is payable to a designated beneficiary over the life or life expectancy of the designated beneficiary.
If paid as an annuity, the entire interest must be payable over a period not greater than the designated beneficiary's life expectancy and distributions must begin before the end of the calendar year following the year of death. Distributions from another Roth IRA cannot be substituted for these distributions unless the other Roth IRA was inherited from the same decedent.
If the sole beneficiary is the spouse, he or she can either delay distributions until the decedent would have reached age 70½ or treat the Roth IRA as his or her own.
Beneficiaries of Qualified Plans
Generally, a beneficiary reports pension or annuity income in the same way the plan participant would have reported it. However, some special rules apply.
A beneficiary of an employee who was covered by a retirement plan can exclude from income a portion of nonperiodic distributions received that totally relieve the payer from the obligation to pay an annuity. The amount that the beneficiary can exclude is equal to the deceased employee's investment in the contract (cost).
If the beneficiary is entitled to receive a survivor annuity on the death of an employee, the beneficiary can exclude part of each annuity payment as a tax-free recovery of the employee's investment in the contract. The beneficiary must figure the tax-free part of each payment using the method that applies as if he or she were the employee.
Benefits paid to a survivor under a joint and survivor annuity must be included in the surviving spouse’s gross income in the same way the retiree would have included them in gross income.
Publication 554, Tax Guide for Seniors
Publication 559, Survivors, Executors and Administrators
Publication 575, Pension and Annuity Income
Publication 590-B, Distributions from Individual Retirement Arrangements (IRAs)