Your Will Doesn't Control Your IRA: Why Beneficiary Designations Matter

Many people assume that whatever their will says about their money is what will happen. For IRAs and employer retirement plans, that assumption can be wrong. These accounts generally pass to whoever is named on the beneficiary form, which means an out-of-date form can matter more than a carefully drafted will. This article explains how designations work and what is worth reviewing.

Does my will control who inherits my IRA or 401(k)?

Generally, no. The IRS describes a beneficiary as any person or entity the account owner chooses to receive the account after death, and says the owner must designate that beneficiary under the procedures the plan or IRA custodian establishes, according to the IRS overview of retirement plan beneficiaries. In practice, that means the form on file with your custodian or plan administrator typically governs, even if your will says something different. How a particular account is treated depends on the account agreement, the plan document, and state law, so an estate attorney is the right person to confirm your situation.

What's the difference between a primary and a contingent beneficiary?

A primary beneficiary is first in line. A contingent beneficiary receives the account if the primary beneficiary has died or declines it. Naming only a primary leaves a gap if that person is no longer living, and the account may then fall to whatever default your custodian's agreement provides, which can include your estate. Many custodians let you name several beneficiaries and assign percentages, so it is worth checking that the percentages add up as you intend.

What happens if the form is out of date?

Beneficiary forms are easy to forget. A divorce, remarriage, birth, or death in the family may leave the form naming someone you would no longer choose, and a will generally does not undo that. Employer plans can add another layer: some plans require a spouse's written consent before a non-spouse can be named as beneficiary. The IRS discusses these rules in its overview of qualified joint and survivor annuity requirements. Whether this applies to you depends on your plan, so check with your plan administrator.

Does it matter who the beneficiary is for tax purposes?

Yes. Under IRS guidance, a beneficiary can be any person or entity, but the type of beneficiary affects how quickly the account may need to be distributed. Publication 590-B explains that:

• A surviving spouse who is the sole beneficiary of an IRA may elect to be treated as the owner of it.
• "Eligible designated beneficiaries" include the owner's surviving spouse, a minor child of the owner, a disabled or chronically ill individual, and an individual not more than 10 years younger than the owner.
• Most other individual beneficiaries who are not taking life-expectancy payments must withdraw the entire balance by December 31 of the year containing the 10th anniversary of the owner's death.
• If the beneficiary is not an individual, such as the owner's estate, different distribution rules apply, and those rules depend in part on whether the owner died before or after their required beginning date.

Our article on the inherited IRA 10-year rule walks through the withdrawal timing in more detail. The right designation structure depends on your family, your other assets, and your goals, so there is no single answer that fits everyone.

What should I think about before naming a trust or my estate?

Naming a trust or an estate can be appropriate in some situations, such as providing for a minor or a beneficiary with special needs, but it can also change how fast the account must be distributed and how it is taxed. Because trust language is technical, this is a decision to make with an estate attorney rather than a form checkbox. Naming your estate by default, or by leaving the form blank, is generally something to avoid without that advice.

How does this fit with the rest of my estate plan?

Retirement accounts are one piece of an estate that may also include a home, taxable accounts, and life insurance. For New York residents, the total matters: the New York State Department of Taxation and Finance lists a basic exclusion amount of $7,350,000 for deaths on or after January 1, 2026, and retirement accounts count toward the estate. Our post on New York's estate tax cliff explains why being near that line deserves attention. Beneficiary choices can also interact with the benefits your spouse may be eligible for; see our overview of Social Security spousal and survivor benefits.

A short checklist

Questions worth asking at least once a year, and after any major life event:

• Is there a named primary and contingent beneficiary on every IRA, 401(k), and other retirement account?
• Do the names, percentages, and relationships still reflect your wishes?
• Does each form match what your will, trusts, and other documents say?
• Do you know where your plan administrators and custodians keep the current forms?

The bottom line

A will is only one part of an estate plan. For retirement accounts, the beneficiary form often does the work, so keeping it current is a low-cost step with potentially large consequences. How the rules apply to you depends on the type of account, your family, your state, and your goals, so consider reviewing your designations with a qualified estate attorney and tax professional.

This article is general educational information, not tax or legal advice. The rules summarized here depend on facts specific to your situation, including account type, plan documents, family circumstances, and state law. Consult a qualified estate attorney or tax professional before acting.