5 Estate Planning Mistakes That Could Cost Your Family Thousands (And How to Avoid Them)

Most people believe that estate planning means having a will tucked away in a drawer somewhere. And if you have that will, you’re covered — right?

Not quite.

The truth is, a will is just one piece of a much larger puzzle. And the gaps between what people think they’ve done and what their plan actually does are where families lose money, time, and sometimes each other.

The good news: these mistakes are entirely preventable. You don’t need to be wealthy. You don’t need a team of lawyers. You just need the right information — and someone in your corner who can help you put the pieces together.

Here are the five most common estate planning mistakes we see — and exactly how to avoid each one.

Mistake #1: Having No Will or Trust at All

Let’s start with the most common one. According to a 2024 Caring.com survey, 67% of Americans have no will or estate plan of any kind. That means most people reading this article are in that group — and if you are, you’re not alone.

But here’s what most people don’t realize: if you die without a will (called dying “intestate”), your state government decides who gets your assets. Not you. Not your family’s wishes. A formula written in your state’s statutes.

That formula doesn’t know that you wanted your daughter to have the house, or that you and your estranged sibling haven’t spoken in 20 years. It doesn’t account for the friend who cared for you in your final months, or the grandchild who needs the most support. The state simply divides assets according to its rules — and the results can be deeply unfair.

Beyond the distribution problem, dying intestate almost always triggers probate court — a public, slow, and expensive legal process where a judge oversees the distribution of your estate. This can take months or years and cost your family significant money in court fees and legal costs.

The fix is straightforward: a simple will — or better yet, a revocable living trust — puts you back in control. Learn more about your options on our Estate Planning page →

Mistake #2: Naming the Wrong Beneficiaries — or None at All

This is the mistake that surprises people most, because it affects accounts they think they’ve already handled.

Here’s the critical fact: retirement accounts (IRAs, 401(k)s) and life insurance policies pass directly to whoever is named as beneficiary — completely outside your will. Your will has zero authority over these assets. It doesn’t matter what your will says; the beneficiary designation on file with the financial institution wins every time.

That creates several dangerous scenarios:

The ex-spouse problem. You remarried 15 years ago, but your 401(k) still lists your first spouse as beneficiary. When you pass, that money goes to them — not your current spouse or children. This happens more often than you’d think.
Minor children named directly. If a minor child is named as beneficiary of a life insurance policy, a court will appoint a guardian to manage those funds until they turn 18 — a process that is costly, slow, and removes your family’s control entirely.
No contingent beneficiary. If your primary beneficiary predeceases you and you haven’t named a backup (contingent) beneficiary, the asset may be forced through probate anyway — defeating the entire purpose of the designation.
Outdated designations after a death. If your named beneficiary has already passed and you never updated the form, the same probate problem applies.

The fix: Do a beneficiary audit today. Pull out every retirement account, life insurance policy, and annuity you own and verify who is named — both primary and contingent. This single action can prevent enormous family conflict and financial loss. (See our bonus action step at the end of this article.)

Mistake #3: Not Having a Power of Attorney or Healthcare Directive

Most estate planning conversations focus on what happens after you die. But what about the period before — when you’re alive but unable to make decisions for yourself?

A stroke, a serious illness, a car accident, or the gradual progression of dementia can all leave you incapacitated. Without the right legal documents in place, your family faces a painful reality: no one has the legal authority to pay your bills, manage your bank accounts, make medical decisions, or sign contracts on your behalf.

Even your spouse may not be able to act without a court order in certain situations. To get that authority, family members must petition for guardianship or conservatorship — a process that can take months, cost thousands of dollars in legal fees, and is emotionally exhausting at an already difficult time.

Two documents prevent all of this:

Durable Power of Attorney (POA): Authorizes a trusted person to manage your financial and legal affairs if you become incapacitated.
Healthcare Directive (Living Will + Healthcare POA): Specifies your medical wishes and authorizes someone to make healthcare decisions on your behalf.

These documents are not just for the elderly. Anyone over 18 should have them — and anyone over 50 absolutely should. See our Estate Planning FAQ for more on POA and healthcare directives →

Mistake #4: Assuming a Will Avoids Probate — It Doesn’t

This is one of the most misunderstood facts in estate planning, and it costs families dearly.

A will does not avoid probate. A will goes through probate. It is simply the document the court uses to guide the process.

Probate is the legal proceeding in which a court validates your will, settles your debts, and oversees the distribution of your assets. Here’s why that matters:

It’s expensive. Probate fees — including court costs, executor fees, and attorney fees — typically run 3% to 7% of the gross estate value. On a $500,000 estate, that’s $15,000 to $35,000 that goes to the process rather than your family.
It’s slow. The average probate proceeding takes 12 to 24 months to complete. During that time, your family may have limited access to estate assets.
It’s public. Probate is a matter of public record. Anyone can look up what you owned, what you owed, and who received what.

The Alternative: A Revocable Living Trust

A revocable living trust is the most effective tool for avoiding probate. Unlike a will, assets held in a trust pass directly to your beneficiaries — no court involvement, no waiting period, no public record.

Here’s how it works: you create the trust, transfer your assets into it (your home, investment accounts, etc.), and name yourself as the trustee while you’re alive. You maintain full control. When you pass, a successor trustee you’ve named distributes the assets according to your instructions — often within weeks, not years.

A trust also provides the incapacity protection mentioned in Mistake #3, since your successor trustee can step in to manage trust assets if you become unable to do so.

The bottom line: if you own a home or have assets over $150,000, a revocable living trust almost always makes more sense than a will alone.

Mistake #5: Not Updating Your Plan After Major Life Events

You did the work. You got the will drafted, maybe even set up a trust. You feel good about it — and then life kept moving.

Estate plans are not “set it and forget it” documents. An outdated plan can be just as harmful as no plan at all. Here are the life events that should trigger an immediate review:

💍 Marriage or remarriage — your new spouse needs to be incorporated into your plan
📄 Divorce — ex-spouses need to be removed from wills, trusts, and beneficiary designations
🕊️ Death of a spouse or named beneficiary — successors and contingents need to be updated
👶 New grandchildren or children — you may want to include them or adjust shares
🏢 Sale of a business or significant change in assets — your plan needs to reflect your current estate
🗺️ Moving to a new state — estate laws vary significantly; what works in one state may not be valid or optimal in another
📅 It’s been more than 3–5 years — even without a major event, a periodic review is simply good practice

A good rule of thumb: review your estate plan every three years, and immediately after any major life change.

Bonus: The Beneficiary Designation Audit — Do This Today

You don’t have to wait for a formal estate planning appointment to take one of the most impactful actions available to you. Here’s a simple audit you can complete in under an hour:

Step 1. Make a list of every account that has a beneficiary designation:

Life insurance policies (check with your insurance company)
IRAs and 401(k)/403(b) accounts
Annuities
Payable-on-death (POD) bank accounts
Transfer-on-death (TOD) brokerage accounts

Step 2. For each account, verify:

✅ Is the primary beneficiary still the right person?
✅ Is there a contingent (backup) beneficiary named?
✅ Are the beneficiaries’ names and information current and accurate?
✅ Has any named beneficiary passed away?

Step 3. Update any designations that are outdated, missing, or incorrect. Most financial institutions allow you to do this online or with a simple form.

This one exercise can save your family tens of thousands of dollars and months of legal headaches.

How Legacy Wealth Services Can Help

Estate planning doesn’t have to be complicated, expensive, or overwhelming. At Legacy Wealth Services, we believe every family deserves a clear, well-organized plan — regardless of the size of their estate.

We’ve partnered with Trust & Will to make professional estate planning accessible and affordable. Trust & Will is a leading online estate planning platform that allows you to create legally valid wills, trusts, powers of attorney, and healthcare directives — guided by licensed professionals, at a fraction of traditional attorney fees.

Whether you’re starting from scratch or reviewing a plan you haven’t looked at in years, we can walk you through the process, identify the gaps, and help you build a plan that truly protects your family.

We also coordinate your estate plan with your broader financial picture — including life insurance, Medicare coverage, Social Security timing, and retirement income strategy — so everything works together the way it should.

Your Next Step: A Free Estate Planning Consultation

The best time to put your estate plan in place was years ago. The second-best time is today.

→ Schedule Your Free Estate Planning Consultation

In this no-obligation conversation, we’ll review what you currently have in place, identify any gaps or outdated designations, and walk you through your options — clearly, without pressure, and with your family’s best interests at the center of every recommendation.

→ Contact Legacy Wealth Services

Your family has worked hard for what they have. Let’s make sure it’s protected.

This article is for educational purposes only and does not constitute legal or financial advice. Please consult a qualified attorney or financial advisor for guidance specific to your situation.