Retirement accounts are part of your estate for tax purposes but usually not for probate. When you name a living beneficiary on a 401(k), 403(b), or IRA, the balance passes directly to that person under the beneficiary contract with the custodian, bypassing probate court. The IRS still counts the full account value in your gross estate, and whoever inherits a traditional account will owe ordinary income tax on every dollar they withdraw. So the answer to whether retirement accounts are part of an estate depends on which question you’re really asking: probate, federal estate tax, or income tax on the heir.
Two Different Questions, Two Different Answers
People use “part of the estate” to mean two things that don’t line up.
The first meaning is the probate estate: the assets a court supervises and distributes under the will or state intestacy law. Retirement accounts with a valid beneficiary designation stay out of this pool. The custodian pays the named person directly on receipt of a death certificate and a claim form, usually within a few weeks. There is no court filing, no waiting for a judge, and no public record of who received what.
The second meaning is the gross estate for tax purposes. That definition is broader. It includes the date-of-death value of retirement accounts, life insurance proceeds, real estate, investments, and other property the decedent owned or controlled, regardless of whether those assets went through probate.1Internal Revenue Service. Frequently Asked Questions on Estate Taxes Retirement accounts belong in the gross estate because the beneficiary receives them by surviving the decedent under a contractual arrangement.2Office of the Law Revision Counsel. 26 U.S. Code 2039 – Annuities
An account can therefore skip probate entirely and still count toward whether your estate owes federal or state estate tax.
How the Beneficiary Designation Overrides Your Will
The form you filled out when you opened the account is a contract with the financial institution. On your death, the custodian pays whoever is listed. That contract overrides your will. If your will leaves everything to your sister but your IRA form still names an ex-spouse, the ex-spouse gets the IRA. Courts have upheld this pattern repeatedly because the beneficiary designation operates independently of the estate plan.
For employer plans covered by federal law, a married account owner cannot name someone other than the spouse without the spouse’s written, witnessed or notarized consent.3Office of the Law Revision Counsel. 29 U.S. Code 1055 – Requirement of Joint and Survivor Annuity and Preretirement Survivor Annuity IRAs have no equivalent federal rule, though community property and elective share laws in some states may give a surviving spouse grounds to challenge a non-spouse designation.
When Retirement Accounts Do Fall Into Probate
The probate bypass only works if a living beneficiary is actually on file. A few common situations pull the account back into the probate estate:
- No beneficiary was ever named, or the custodian can’t locate the form. The plan’s default rules apply, usually sending the balance to a surviving spouse first and then to the estate.
- Every named beneficiary died before you and no contingent beneficiary was named.
- The account owner listed “my estate” on the form, which is almost always a mistake because it exposes the money to creditor claims and probate delays.
Once retirement funds are in the probate estate, the executor must use them to pay the decedent’s debts before anything reaches heirs. Filing fees, attorney fees, and executor fees can consume a meaningful percentage of the value, and distribution can be delayed for months. A five-minute beneficiary form update avoids all of it.
Federal Estate Tax and the $15 Million Exemption
For 2026, the federal estate tax exemption is $15 million per individual, or $30 million for a married couple using portability. That threshold reflects the increase enacted through the One, Big, Beautiful Bill signed into law on July 4, 2025.4Internal Revenue Service. What’s New – Estate and Gift Tax Estates above the threshold face a top marginal rate of 40%.5Office of the Law Revision Counsel. 26 U.S. Code 2001 – Imposition and Rate of Tax
Very few estates actually owe federal estate tax. But a large retirement account can be the asset that pushes a borderline estate over the line. Someone with $10 million in real estate and business interests might not think they have an estate tax problem until a $6 million IRA is added to the total. Any estate tax owed is paid from the estate’s assets before final distribution.
State Estate and Inheritance Taxes
About a dozen states and the District of Columbia impose their own estate taxes at thresholds far below the federal level. Oregon’s begins at $1 million and Massachusetts at $2 million, with several others between $2 million and $7 million. Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania also levy inheritance taxes, paid by the recipient rather than the estate, with rates and exemptions that vary by the heir’s relationship to the deceased.
State estate taxes use the same broad gross estate calculation the IRS uses, so retirement accounts count. A family that owes no federal estate tax may still owe state tax when a large retirement account combines with a home and other assets to cross a state threshold they didn’t know existed.
Income Tax Is Usually the Bigger Bill
Estate tax gets the headlines. Income tax is the cost most beneficiaries actually pay.
Traditional IRA and 401(k) balances have never been taxed. The original owner deferred that tax during their working years. When a beneficiary withdraws from an inherited traditional account, every dollar comes out as ordinary income at the beneficiary’s marginal rate.6Internal Revenue Service. Publication 590-B – Distributions from Individual Retirement Arrangements (IRAs) A large inherited traditional IRA can push the beneficiary into a higher bracket for several years.
Inherited Roth IRAs are much more favorable. Withdrawals of contributions are tax-free, and withdrawals of earnings are tax-free as long as the Roth was open for at least five years before the owner’s death.7Internal Revenue Service. Retirement Topics – Beneficiary If the five-year clock wasn’t satisfied, the earnings portion may be taxable, but the contribution portion remains tax-free.
The IRD Deduction When Both Taxes Hit
When an estate is large enough to owe federal estate tax on a retirement account, and then the beneficiary owes income tax on withdrawals from the same account, the same dollars get taxed twice. Congress addressed this through the “income in respect of a decedent” deduction under IRC Section 691(c). It lets the beneficiary deduct the portion of federal estate tax attributable to the inherited account when reporting the withdrawal as income.8Office of the Law Revision Counsel. 26 U.S. Code 691 – Recipients of Income in Respect of Decedents Individuals claim it as an itemized deduction on Schedule A.9Internal Revenue Service. Publication 559 – Survivors, Executors, and Administrators Many beneficiaries miss it. On a large inherited account where estate tax was paid, working with a tax professional to claim this deduction can be worth tens of thousands of dollars.
Distribution Deadlines Heirs Have to Meet
Beneficiaries cannot leave inherited retirement money growing tax-deferred indefinitely. The SECURE Act and SECURE 2.0 reshaped the timelines, and the IRS finalized regulations in 2024. The rules turn on your relationship to the deceased and whether the owner had already started required minimum distributions.
The 10-Year Rule
If you inherited an account from someone who died in 2020 or later and you are not an “eligible designated beneficiary,” you must empty the account by December 31 of the tenth year after the year of death.7Internal Revenue Service. Retirement Topics – Beneficiary This is the rule that applies to most adult children, siblings, friends, and other non-spouse heirs.
If the original owner had already reached their required beginning date for distributions (generally age 73 in 2026), you also have to take annual minimum distributions in years one through nine, with the remaining balance due in year ten.10Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs If the owner died before that age, you can time withdrawals however you like within the 10-year window as long as the account is fully drained by the deadline.
Missing a required distribution triggers a 25% excise tax on the amount you should have taken. SECURE 2.0 reduced this from the previous 50%, and it drops to 10% if you correct the shortfall within two years.
Beneficiaries Who Get More Time
A narrow group can stretch distributions over their own life expectancy instead of the 10-year window.7Internal Revenue Service. Retirement Topics – Beneficiary Surviving spouses have the most options, including rolling the inherited account into their own IRA and treating it as their own, which delays distributions until they reach age 73. The deceased’s minor children can use life expectancy until they turn 21, at which point the 10-year clock starts. Disabled or chronically ill beneficiaries and beneficiaries not more than 10 years younger than the deceased also qualify for life-expectancy treatment.
What to Check Now
The difference between a clean transfer and a costly one usually comes down to paperwork done well in advance. Review your beneficiary designations every few years and after marriage, divorce, a birth, or a death in the family. Name both a primary and a contingent beneficiary on every account. If you have an employer plan and want to name someone other than your spouse, complete the spousal consent form through the plan administrator so the designation will actually hold up.
If you’re the one inheriting, the two most expensive mistakes are missing a required distribution and overlooking the IRD deduction. The 10-year rule is also a planning opportunity. Spreading withdrawals across years usually keeps you in a lower bracket than a lump sum or a year-ten liquidation. On a $500,000 inherited traditional IRA, that choice alone can easily be worth $30,000 or more in avoided tax.