Beneficiary Designations Override Your Will: What to Update

Consider what happens when someone updates their will after a divorce but forgets to update the beneficiary on their 401(k). Years later, when they die, the ex-spouse named on the 401(k) beneficiary form receives the entire account balance, and the will's instructions about who should inherit it are legally irrelevant. This is not a hypothetical edge case. It is the most common estate planning mistake people make, and it happens because beneficiary designations on certain accounts override what the will says, regardless of how recent or carefully drafted the will is.

The reason this override exists is structural. Retirement accounts, life insurance policies, and several other account types pass directly to the named beneficiary outside of probate. The probate process is what enforces a will. If an asset never enters probate, the will never reaches it. Understanding which accounts work this way, and how to keep the designations current, is one of the most consequential parts of estate planning.

The Document Most People Forget to Update

When you open a 401(k), IRA, life insurance policy, or even a bank account with a payable-on-death (POD) designation, you name a beneficiary, the person who receives that asset when you die. The beneficiary designation on the account overrides whatever your will says. It does not matter if your will leaves everything to your spouse. If your ex-spouse is still listed as the beneficiary on your 401(k), the money goes to your ex.

This is not a rare technicality. It happens regularly, often because someone set up their retirement account years ago, went through a divorce, remarried, and never updated the beneficiary form. The will gets updated, but the beneficiary designations on financial accounts get forgotten.

Where Beneficiary Designations Exist

They are attached to more accounts than most people realize: 401(k) and 403(b) plans, traditional and Roth IRAs, pension plans, life insurance policies, annuities, bank accounts with POD designations, and brokerage accounts with transfer-on-death (TOD) registrations. Each of these passes directly to the named beneficiary outside of probate, which is one of their advantages. It also means they operate independently of your will or trust.

Primary and Contingent Beneficiaries

Most accounts let you name a primary beneficiary (who gets the asset first) and a contingent beneficiary (who gets it if the primary beneficiary has already died). If you only name a primary and they predecease you, the asset may go to your estate and end up in probate, exactly the outcome most people are trying to avoid. Naming a contingent beneficiary is a simple step that provides a backup plan.

You can also designate percentages if you want assets split among multiple beneficiaries. For example, 50% to a spouse and 25% each to two children. The key is to review these designations any time there is a major life event (marriage, divorce, birth of a child, death of a beneficiary) and to make sure they align with your overall estate plan.

Which Accounts Have Beneficiary Designations and Which Do Not

Not every account allows for a beneficiary designation. The accounts that do, and where the override applies, are a defined list. The accounts that do not get distributed by the will or by state intestacy law if no will exists.

Accounts with beneficiary designations. Retirement accounts (401(k), 403(b), traditional IRA, Roth IRA, pensions), life insurance policies, annuities, transfer-on-death (TOD) brokerage accounts, and payable-on-death (POD) bank accounts. Each of these passes to the named beneficiary directly upon death, outside of probate, regardless of what the will says. The deeper mechanics of TOD and POD designations on brokerage and bank accounts are covered in account titling and what TOD or POD means.

Accounts without beneficiary designations. Taxable brokerage accounts that have not had a TOD election filed, real estate that is not held in joint tenancy or with a transfer-on-death deed, vehicles, and personal property. These pass through the will (if one exists) or through state intestacy law (if no will exists). The will controls these assets the way most people assume it controls everything, which is precisely why it is easy to miss that it does not control the beneficiary-designated accounts.

How to Check and Update

Contact your HR department for employer-sponsored plans, your financial institution for IRAs and brokerage accounts, and your insurance company for life insurance policies. Most updates can be done with a simple form. It takes 15 to 20 minutes to review all your designations, and it is one of the most impactful things you can do for your estate plan.

A complete review covers every account that passes by beneficiary designation, confirms a primary and a contingent beneficiary on each, and verifies that the percentages and named individuals match your current intentions. Review your accounts and beneficiary assignments in one place.