Filling out a beneficiary form is standard practice when opening a 401(k) or IRA retirement account. Most Illinois residents never give it another thought, but that form carries significant importance.
When you die, retirement accounts pass according to the beneficiary designation on file with the plan or custodian, not according to instructions in a will. But when the form is left blank, was never updated, or names a beneficiary who has passed away, the account doesn’t simply go to the next logical heir named in your will. Consulting with an experienced estate planning attorney can identify and resolve gaps in your bequests that trigger administrative costs in probate court.
The Account Becomes Part of Your Probate Estate
Without a beneficiary on file, most investment plan administrators and custodians treat the account as payable to the deceased owner’s estate. That reclassification pulls the account into the public, court-supervised probate process rather than transferring the funds quickly and privately. Once retirement funds default into an estate a probate court becomes involved and the process is governed by state law, taking longer and costing more than a well-planned beneficiary designation.
Some 401(k) plans include default beneficiary language, naming a surviving spouse first and children second if no beneficiary was named. Yet this automatic process doesn’t avoid probate, as only a beneficiary named by the account holder can bypass it. This sort of boilerplate beneficiary language simply tells the estate administrator who should receive the funds after probate is complete.
How Illinois Law Decides Who Inherits
If the owner of a 401(k) or IRA dies without a will, the Illinois Probate Act’s intestate succession rules decide who inherits (the same rules apply to other assets that are not covered by a will). This law gives:
- the entire estate to a surviving spouse if there are no children or other descendants
- half of the estate to the surviving spouse and half to any surviving descendants
- if no surviving spouse nor descendants are found, parents, siblings, and more distant relatives inherit the estate
If the account owner left a will, the will’s residuary clause controls who among named beneficiaries receives the account once it clears probate.
The Probate Shortcut for Small Estates
Modest estates are eligible for a quicker, less formal probate process. A Probate Act amendment that took effect in August 2025 allows an estate to be settled with a small estate affidavit if it does not include real estate and its value is $150,000 or less (not counting any vehicles). This allows heirs to collect the funds with a notarized affidavit rather than a lengthy court case.
Tax Consequences To Avoid
Accounts that go to probate incur administrative costs and a lengthier process. This probate detour can trigger an unpleasant tax outcome, too: when an estate becomes the beneficiary, required distributions change as well. Under this scenario, rather than taking periodic distributions, money can be forced out of a tax-deferred account faster, elevating the heir to a higher (less desirable) tax bracket. But a directly-named beneficiary has more flexibility, including being able to roll inherited funds into their own inherited IRA.
Prevention Through Planning Is the Simple Solution
Naming a beneficiary takes minutes and can be accomplished online or with a beneficiary designation form provided by your company’s HR department. Illinois estate planning attorneys at Legacy & Life Law suggest listing both a primary and contingent (backup) beneficiary, then reviewing those designations after major life events like marriages, divorces, births, or deaths. If your account is already caught in this situation, or if you need help coordinating retirement accounts with a broader estate plan, call for a consultation.