The Most Common Estate Planning Mistake in 2026: Forgetting to Update Beneficiary Designations

Many people spend considerable time and effort creating a revocable living trust, signing powers of attorney, and preparing healthcare directives. Yet one of the most expensive estate planning mistakes continues to occur after the documents are signed: failing to review and update beneficiary designations.

For families in La Mesa, California, and Kirkland, Washington, this oversight can result in assets passing to unintended beneficiaries, unnecessary taxes, family disputes, and even litigation. The good news is that this mistake is often easy to prevent with regular estate plan reviews.

What Are Beneficiary Designations?

Certain assets pass directly to a named beneficiary and do not follow the instructions in your will or trust. Common examples include:

• Retirement accounts such as IRAs and 401(k)s

• Life insurance policies

• Annuities

• Transfer-on-death (TOD) accounts

• Payable-on-death (POD) bank accounts

• Some investment accounts

Because these assets transfer by contract, the beneficiary designation generally controls, regardless of what your trust or will says.

For example, if your trust leaves everything equally to your three children but your IRA names only one child as beneficiary, that IRA may pass entirely to the named child.

Why This Issue Is Becoming More Common

Today, many individuals have accounts spread across multiple employers, financial institutions, and online platforms. As life changes occur, beneficiary forms often get overlooked.

Common life events that should trigger a review include:

• Marriage

• Divorce

• Birth or adoption of a child

• Death of a spouse or beneficiary

• Remarriage

• Retirement

• Sale of a business

• Significant increases in wealth

• Relocating between states

Even individuals with recently updated trusts frequently discover that older beneficiary designations remain on file.

California and Washington Residents Face Unique Considerations

Both California and Washington are community property states. While beneficiary designations typically control the distribution of an account, community property rights may create additional complexity in certain situations.

Additionally, blended families are increasingly common. Parents who wish to provide for a surviving spouse while also preserving assets for children from a prior relationship must carefully coordinate trust provisions and beneficiary designations.

Without proper planning, assets can unintentionally disinherit children or undermine the goals established in the estate plan.

Retirement Accounts Require Special Attention

Retirement accounts often represent a significant portion of a family's wealth.

The SECURE Act changed many inherited retirement account rules and shortened distribution periods for many beneficiaries. As a result, naming beneficiaries has become both an estate planning and tax planning decision.

Questions worth discussing include:

• Should a spouse be the primary beneficiary?

• Should children inherit directly or through a trust?

• Are there beneficiary designations that could reduce tax consequences?

• Do charitable gifting goals affect retirement account planning?

A coordinated review with an estate planning attorney can help ensure these assets are aligned with your overall objectives.

Common Red Flags

You should consider an immediate beneficiary review if:

• Your former spouse is still listed on any account.

• Minor children are named directly as beneficiaries.

• Your trust was created years ago and accounts have never been reviewed.

• You opened new retirement or brokerage accounts after signing your trust.

• Beneficiary forms cannot be located.

• A beneficiary has passed away.

These situations frequently create probate complications and delayed administration after death.

How Often Should You Review Your Estate Plan?

A good rule of thumb is to review your estate plan every three to five years, or whenever a major life event occurs.

During a review, an estate planning attorney can examine:

• Trust provisions

• Powers of attorney

• Healthcare directives

• Property ownership

• Business interests

• Beneficiary designations

This coordinated review helps ensure that all parts of the estate plan work together as intended.

The Bottom Line

Creating a trust is an excellent first step, but it is only one piece of a comprehensive estate plan. Beneficiary designations often control some of a family's most valuable assets, and failing to keep them updated can undo years of careful planning.

For California and Washington families, a periodic review can help avoid probate issues, reduce tax exposure, and ensure that assets pass according to your wishes.

📞 Contact East County Estate Planning, PC today to schedule your consultation. We’ll help you build an estate plan that protects your business, avoids probate, and minimizes taxes—while giving your loved ones the clarity they’ll need.

Office Locations

La Mesa Office

Kirkland Office

📞 Call us today at (619) 566-8084 or visit www.ecestateplanning.com to schedule your free consultation.

Disclaimer: The information provided in this blog is for general informational purposes only and does not constitute legal advice. Reading this blog or contacting our firm through this website does not create an attorney–client relationship. You should not act or refrain from acting based on any content included in this blog without seeking appropriate legal or other professional advice specific to your situation.