The single most common estate planning mistake seen in practice: a client spends thousands of dollars on a carefully drafted trust, then leaves their retirement account beneficiary designation unchanged from 1998 — naming an ex-spouse who has since remarried and moved to Florida.

The trust is irrelevant. The ex-spouse gets the money. This isn't a hypothetical — it happens regularly, and it is entirely preventable.

How Beneficiary Designations Work

When you open a retirement account, life insurance policy, or payable-on-death bank account, you sign an account agreement with the financial institution. That agreement controls what happens to the account when you die — not your will, and not your trust.

Beneficiary designations are a form of contract between you and the financial institution. Courts have consistently held that these contractual designations override conflicting estate planning documents. Your trust might say "divide everything equally among my three children." Your IRA beneficiary form says "100% to Jane Smith." Jane Smith gets the IRA.

This is not a loophole. It is exactly how these accounts were designed to work — to pass quickly and privately to named individuals without court involvement.

Which Assets Pass by Beneficiary Designation

A significant portion of most Americans' wealth passes by beneficiary designation, completely outside the trust and will:

• IRAs (Traditional, Roth, SEP, SIMPLE)
• Employer retirement plans (401(k), 403(b), 457, TSP, pension plans)
• Life insurance policies (term and permanent)
• Payable-on-death (POD) bank accounts
• Transfer-on-death (TOD) brokerage accounts
• Annuities

For many Sacramento families, these assets represent 50–70% of their net worth. If the beneficiary designations are wrong, most of the estate plan fails at the moment it's needed most.

Five Costly Beneficiary Designation Mistakes

1. Naming an Ex-Spouse

California law automatically revokes beneficiary designations for IRAs when couples divorce — but federal ERISA law preempts California law for employer-sponsored plans like 401(k)s. Under ERISA, your ex-spouse remains the beneficiary of your 401(k) until you change the form, regardless of your divorce decree.

If you've changed jobs and left a 401(k) with an old employer, check that account immediately. You may have a beneficiary designation sitting there from a marriage that ended years ago.

2. Naming a Minor Child Directly

Financial institutions cannot pay funds directly to a minor. When a minor is named as beneficiary of a retirement account or life insurance policy, California law requires the appointment of a court-supervised guardian of the estate to manage the funds until the child turns 18.

Establishing a guardianship costs $5,000–$15,000 and requires annual court accountings for years. When the child turns 18, they receive everything in a lump sum — with no restrictions, regardless of their maturity. This is almost never what the parent intended.

3. Naming "My Estate" as Beneficiary

Naming your estate as beneficiary of a retirement account is one of the worst planning choices available. It forces the account through probate, eliminates the ability to stretch distributions, and requires all funds to be distributed within five years under most plan rules.

For a $500,000 IRA, distributing everything within five years compresses years of potential tax-deferred growth and pushes the beneficiary into higher tax brackets. The income tax cost can easily exceed $100,000.

4. Naming a Trust Improperly as Beneficiary

Naming a trust as retirement account beneficiary is sometimes the right answer — but only if the trust is specifically drafted to qualify as a "see-through" trust under IRS rules. If the trust doesn't meet the requirements (all beneficiaries identifiable, all individuals, trust is irrevocable at death), the IRS treats the estate as the beneficiary, triggering the five-year rule.

Never name a trust as an IRA beneficiary without first confirming with an attorney that the trust is properly drafted for this purpose.

5. Stale Designations from Old Jobs

Many people have retirement accounts from employers they left 10, 15, or 20 years ago — sometimes with beneficiary designations they can barely remember. College girlfriend. First spouse. Parents who have since died. These accounts still exist and still pass to whoever is named on the form.

The Right Approach for Each Account Type

Retirement Accounts (IRA, 401k, 403b, TSP)

Name your spouse as primary beneficiary. Name your children equally (or a properly drafted see-through trust if there are minor children or special needs beneficiaries) as contingent beneficiaries. Under the SECURE Act of 2019, non-spouse beneficiaries must withdraw everything within 10 years — plan your beneficiary structure accordingly.

Life Insurance

Same structure: spouse primary, children contingent. If you want the trust to manage life insurance proceeds for young children or special situations, name the trust as beneficiary — but confirm the trust is properly structured first.

Bank Accounts

Use payable-on-death (POD) designations. A POD designation does not make someone a joint owner — the account remains entirely yours during your lifetime. At your death, the named beneficiary receives the funds directly with no court involvement. You can name multiple beneficiaries and specify percentages.

Brokerage and Investment Accounts

Use transfer-on-death (TOD) designations. These work identically to POD for bank accounts — the account passes directly to named beneficiaries at death, bypassing probate entirely.

Your Beneficiary Designation Audit Checklist

Make a list of every account you own and verify each one:

• Current employer retirement plan — primary and contingent beneficiary
• All former employer plans (even if rolled over — check the old plan too)
• All IRA accounts (Traditional, Roth, SEP, SIMPLE)
• Life insurance policies (all of them, including through employers)
• Bank accounts — do they have POD designations?
• Brokerage accounts — do they have TOD designations?
• Annuities

Update immediately after: marriage, divorce, birth of a child or grandchild, death of a named beneficiary, or any significant change in your relationships or estate plan.