7 Estate Planning Mistakes That Cost Families Thousands

Estate planning mistakes don't announce themselves. They surface at the worst possible moment — when a family is grieving, when there's no time to fix anything, and when the cost of getting it wrong is measured in tens or hundreds of thousands of dollars. Every one of these mistakes is preventable. Every one of them happens all the time.

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

More than 150 million Americans have no estate plan whatsoever. No will. No trust. No powers of attorney. Nothing. The assumption is that estate planning is for wealthy people or something to deal with later. Neither is true.

Without any plan in place, your state's intestacy laws take over the moment you die. The state decides who receives your assets — and its formula may have nothing to do with your actual wishes. More importantly, the state decides who raises your minor children. If both parents die without naming a guardian, a judge makes that call, possibly choosing someone you never would have chosen.

The financial consequences compound quickly. Intestate estates frequently go through extended probate — sometimes a year or more. Legal fees, court costs, and family conflict eat into what you leave behind. Assets can end up going to estranged relatives instead of the partner you lived with for a decade. An unmarried partner has essentially no inheritance rights in most states without a will.

Even a simple, properly executed will is vastly better than nothing. It names your beneficiaries, appoints a guardian for minor children, and designates an executor to manage the process. Read our complete guide to wills to understand what you need and how to get started.

This is one of the most financially devastating mistakes in estate planning — and one of the most common. Your beneficiary designations on retirement accounts, life insurance policies, and bank accounts operate completely independently of your will. They override it.

If you named your ex-spouse as the beneficiary on your 401(k) fifteen years ago and never updated that designation, your ex-spouse receives that account when you die — regardless of what your will says, regardless of your divorce decree in most states, and regardless of your current wishes. Your current spouse gets nothing from that account.

This applies across all assets with beneficiary designations: IRAs and Roth IRAs, employer-sponsored retirement plans (401(k), 403(b), 457), life insurance policies, payable-on-death (POD) bank accounts, and transfer-on-death (TOD) brokerage accounts. Together, these can represent the majority of a person's net worth.

A living trust is one of the most powerful estate planning tools available. It avoids probate, preserves privacy, enables smoother asset transfers, and can provide substantial tax benefits. An unfunded living trust does none of those things.

Creating a trust and failing to fund it — that is, failing to actually transfer your assets into the trust — is a remarkably common and expensive mistake. Estimates suggest that 50–70% of living trusts are never properly funded. The trust document exists. The trustee is named. But because the assets were never retitled in the trust's name, they still belong to you personally. When you die, those assets go through probate — the exact outcome you paid to avoid.

Funding a trust is not automatic. It requires deliberate action for each asset category: your home and other real estate must be deeded into the trust; bank accounts must be retitled; brokerage accounts must be transferred; and your trust should be named as beneficiary (or contingent beneficiary) on appropriate accounts. This process requires coordination with banks, title companies, and financial institutions.

If you created a trust more than a year ago and haven't verified that it's funded, stop and check. Our guide to funding a living trust walks through each asset type and exactly what to do. And read our broader guide to trusts if you're evaluating whether a trust is right for your situation.

Most people are aware that the federal government imposes an estate tax. What fewer people realize is that the federal exemption in 2026 is $15 million per person — meaning the vast majority of estates owe no federal estate tax at all. This creates a dangerous assumption: that estate tax simply isn't a concern.

Twelve states plus Washington, D.C. impose their own separate estate taxes, with exemption thresholds far below the federal level. If you live in one of these states, or own significant property there, your estate may owe substantial state estate tax even if it owes zero federal tax.

In Oregon, an estate worth $1.5 million can owe tens of thousands of dollars in state estate tax while owing nothing at the federal level. With proper planning — marital deductions, bypass trusts, gifting strategies, and charitable vehicles — much or all of that liability can be reduced or eliminated. But only if you plan for it in advance.

See our state-by-state guides for the full list of states with estate taxes, current thresholds, and planning strategies specific to each state. And if your estate is approaching these thresholds, read our estate tax planning guide for a comprehensive overview of available strategies.

On a life insurance policy or retirement account, you'll often see an option to name "my estate" as the beneficiary. It sounds reasonable — everything flows to your estate, which distributes it per your will. In practice, it is one of the more expensive mistakes you can make.

When you name your estate as beneficiary of a life insurance policy, the death benefit — which would otherwise pass directly to named beneficiaries outside probate — gets pulled into your probate estate. It's now subject to probate delays, publicly accessible court records, and potential creditor claims. A $500,000 life insurance payout that should have reached your family in weeks can be tied up for a year or more.

For retirement accounts, the consequences are even more significant. When an individual is named beneficiary, they can use "stretch" distribution rules, spreading required minimum distributions over their own life expectancy and allowing the account to continue growing tax-deferred. When the estate is the beneficiary, this option disappears. The full balance must be distributed within five years, compressing the tax hit dramatically.

Online will and trust services have democratized estate planning in genuinely important ways. For a single person with a simple financial picture and no minor children, a well-designed online tool can produce a valid, effective will at a fraction of the cost of an attorney. We think these services are excellent — for the right situation.

The mistake is using a generic template for a situation that isn't generic. Several categories of complexity should send you to an attorney:

• Blended families. Step-children, children from prior relationships, and second marriages create competing interests that a standard template cannot adequately address. Courts are full of cases where DIY documents inadvertently disinherited a child or created unintended conflicts between a surviving spouse and children from a prior marriage.
• Business interests. If you own a business — even a minority interest — your estate plan must address buy-sell agreements, business succession, and valuation. A generic will rarely handles this correctly.
• Taxable estates. If your estate may be subject to state or federal estate tax, effective planning requires tools — bypass trusts, GRATs, SLATs, QPRTs, and others — that no template provides.
• Property in multiple states. Real estate is governed by the laws of the state where it's located. Owning property in two or more states without a trust can mean multiple separate probate proceedings.
• Special needs beneficiaries. Leaving assets directly to a beneficiary who receives government benefits — Medicaid, SSI — can disqualify them from those programs. A special needs trust is required.

The cost of an estate planning attorney for a well-drafted plan — typically $1,500–$5,000 for a comprehensive set of documents — is modest compared to the cost of a legal dispute, a failed plan, or an avoidable tax bill.

Creating an estate plan is not a one-time event. Life moves — and an estate plan that doesn't move with it can create serious problems decades later.

A will written before your children were born may not provide for them properly. A trust drafted when you were single may not account for a spouse. A plan created in one state may have complications now that you've moved. A financial picture that looked one way in 2015 may look very different in 2026 after a business sale, an inheritance, or a significant market gain. And tax laws change — sometimes dramatically.

Specific events that should trigger an immediate review of your estate plan:

• Marriage or remarriage
• Divorce or legal separation
• Birth or adoption of a child or grandchild
• Death of a beneficiary, executor, or trustee named in your documents
• Significant change in assets (inheritance, business sale, large purchase)
• Moving to a new state, especially if it has different estate or inheritance tax rules
• Major changes in federal or state tax law
• A beneficiary developing a disability or substance abuse issue
• Estrangement from or reconciliation with a family member

Even if none of these apply, plan to review your documents every 3 to 5 years. What needs updating may not be obvious without a fresh look.

What to Do Now

Most of these mistakes are fixable — but only while you're alive and have time to act. Here are the concrete steps to take this week:

• Take the estate planning assessment to understand exactly where you stand and what gaps need to be addressed.
• Review every beneficiary designation this week. Log into each retirement account, check your life insurance policy, and verify your bank and brokerage accounts. Update anything that is wrong or outdated.
• If you have a living trust, verify it is funded. Pull out your trust document and compare the listed assets against what you actually own. If there are gaps, contact your estate planning attorney.
• Check your state's estate tax rules using our state-by-state guides. If your estate is approaching the threshold, this is urgent planning territory.
• If you have no plan at all, start today. Read our wills guide to understand your options and take the first step. If you have a simple situation, an online service can have a valid will completed in under an hour. If your situation is complex, contact an estate planning attorney.
• Set a calendar reminder to review your plan in 3 years — or immediately if a major life event occurs before then.

Estate planning isn't complicated once you understand the pieces. The mistakes covered here aren't obscure technicalities — they are predictable, avoidable, and happen to well-intentioned people every day. The only difference between a family that loses tens of thousands to a preventable mistake and one that doesn't is whether someone took the time to look.