What Are the Most Common Inheritance Mistakes — and How Do You Avoid Them?

What are the most common inheritance mistakes?

The most common inheritance mistakes happen on both sides of the transaction. For those leaving an estate, mistakes include dying without a will, forgetting to update beneficiary designations, and failing to fund a trust. For those receiving an inheritance, the biggest errors are spending impulsively, misunderstanding tax obligations, and not updating their own estate plan afterward.

Most inheritance problems don’t start with greed or bad intentions. They usually begin with outdated forms, missing documents, or assumptions that turn out to be wrong.

Whether you are planning to leave assets to your family or you have just received an inheritance, the decisions you make — or fail to make — can cost your family tens of thousands of dollars, drag loved ones through probate court, or spark conflicts that damage relationships for years.

This guide covers the most common inheritance mistakes on both sides: the ones people make while planning, and the ones people make after inheriting. Recognizing them is the first step to avoiding them.

Mistakes People Make When Planning Their Estate

Dying Without a Will — and Assuming the State Will Figure It Out

This is the single most damaging mistake a person can make with their estate.

Around 67% of Americans die without an estate plan, leaving courts to decide how assets are distributed. When this happens, state laws — not your wishes — dictate who gets what. That often leads to confusion, resentment, and legal battles among family members. Probate can drag on for months or even years, adding stress and cost to an already difficult time.

People often assume they don’t need a will because their spouse will simply get everything, or because their family will work it out. Neither assumption holds up in court. State intestacy laws follow a rigid formula that has nothing to do with what you actually wanted. Without a clear document, a judge decides — not you.

Speaking with an estate planning attorney is the most reliable way to start. Our guide on what kind of lawyer you need for a will and trust explains exactly what to expect.

Forgetting That a Will Does Not Control Everything You Own

Many people spend time and money creating a solid will — and then leave some of their most valuable assets completely outside of it, governed by old forms they filled out years ago.

Assets like retirement accounts, life insurance, and many brokerage accounts generally transfer based on beneficiary designations — not based on the will. Old beneficiary designations can send money to an ex-spouse or unintended recipient, and these forms must be updated intentionally and reviewed regularly.

Here is a practical example: your will says your IRA goes to your son, but ten years ago you named your daughter as the IRA beneficiary and never updated it. The daughter will get the IRA, regardless of what the will says — because an IRA is not an asset controlled by the will.

Review every beneficiary designation on your accounts — retirement funds, life insurance, bank accounts with payable-on-death designations — and make sure they are consistent with your overall estate plan. This is especially critical after a divorce, remarriage, or the birth of a new child or grandchild.

Creating a Trust but Never Actually Funding It

A trust only protects the assets that are inside it. Setting one up and failing to transfer assets into it is one of the most common — and most expensive — estate planning errors attorneys see.

One couple had an attorney create a trust, who even deeded their home to the trust. But they later sold the home and purchased another in their personal names, not in the name of the trust. When the second spouse died, all of their assets were subject to probate and were part of the taxable estate. By not titling their assets in the name of the trust, they defeated both of their planning goals: avoiding probate and reducing estate taxes.

If you have a living trust, every significant asset needs to be retitled in the trust’s name — real estate, bank accounts, investment accounts. Anything left out of the trust may still go through probate when you die. Our article on how to fund a trust correctly and avoid probate walks through this process step by step.

Never Updating the Estate Plan After Life Changes

An estate plan is not something you do once and forget about. Life changes constantly — and an outdated plan can be just as dangerous as no plan at all.

Failing to update a plan can make it worthless due to changes in the law and the people named in it. One attorney reviewed a will created in 1976. There was a long, tedious process of settling the estate, resulting in unnecessary expenses and family strife.

Common life changes that require an estate plan review include divorce or remarriage, the birth of grandchildren, a child’s marriage or divorce, a significant change in your financial situation, or a move to a different state with different tax laws. Each state has its own estate and income tax laws, and a document drafted in one state might not be appropriate in another.

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

Using Vague Language That Invites Family Conflict

Even people who do have a will sometimes create one that does more harm than good — because the wording is unclear.

Courts frequently see disputes caused by vague language or missing details in estate documents. Saying “divide everything fairly” sounds reasonable, but what does fair actually mean? One sibling may interpret it as equal shares, while another may factor in caregiving contributions or financial need. Ambiguity invites interpretation, and interpretation leads to conflict.

Be specific. Name every beneficiary clearly. Specify what happens if a beneficiary predeceases you. Address sentimental items like heirlooms and family property explicitly. Many people overlook non-financial assets such as heirlooms, pets, or family keepsakes, which can spark disputes just as intense as those over money.

Leaving Assets Directly to Children Without Protecting Them From In-Laws or Creditors

When you leave assets outright to a child, those assets become fully theirs — which means they can also become available to a divorcing spouse, creditors, or a new partner your child might marry after you are gone.

Related article: Who Is the Rightful Heir to an Estate? Here’s What the Law Actually Says

If a parent dies and leaves everything to a son, who then commingles those funds with marital assets, the daughter-in-law may be entitled to a significant portion through equitable distribution in a divorce. A Bloodline Trust prevents this: trust assets are never available to a son- or daughter-in-law, either during the marriage or in a divorce.

This is especially worth considering if your child is in a marriage that seems unstable, has a history of financial difficulty, or has children from a previous relationship. For more on protecting inherited assets from in-laws, see our article on whether a son-in-law can inherit your estate.

Mistakes People Make After Receiving an Inheritance

Spending the Money Before Making a Plan

This is where many inheritances quietly disappear. Inheriting money or assets can create an immediate temptation to spend, and making large purchases or impulsive financial decisions is almost always a mistake. Before making any financial moves, take the time to develop a plan that considers your long-term financial goals.

All too often, people fritter away inheritances by making major purchases right away — cars, boats, or vacations. Even if such purchases don’t seem significant at first, the costs accrue quickly, especially when items have additional maintenance and insurance costs.

Financial advisors generally recommend waiting at least 90 days before making any major decisions with an inherited sum. This gives you time to grieve, consult professionals, and think clearly about what the money should actually accomplish in your life.

Assuming Inherited Money Is Always Tax-Free

Many heirs are caught off guard when tax bills arrive — because they assumed inheritance is never taxed.

The reality is more complicated. One common mistake many beneficiaries make is assuming all inheritance-related income is tax-free. While the inheritance itself may not be taxable, income generated afterward often is, and this misunderstanding can lead to underreporting.

There are also state-level inheritance taxes to be aware of. As of 2026, six states impose their own inheritance taxes. Whether you owe one depends on the state where the deceased lived or where the property is located. Maryland’s rate can reach 10%, for example.

Inherited retirement accounts carry a particularly important rule: many non-spouse beneficiaries must empty inherited retirement accounts within 10 years, and in some cases annual distributions are also required depending on IRS rules. Taking large withdrawals in a single year can push heirs into higher tax brackets. Careful timing of those withdrawals can significantly reduce the total tax bill.

Before touching any inherited funds, speak with both a tax advisor and an estate planning attorney. Getting the tax strategy right from the start protects far more of the money than trying to fix mistakes after the fact.

Not Updating Your Own Estate Plan After You Inherit

People often focus entirely on the inheritance they just received — and forget that receiving significant assets changes their own estate planning situation.

Once you receive an inheritance, it is crucial to revisit or create your own estate plan. Your inheritance may increase the size of your estate, potentially making estate taxes or probate issues more relevant to your situation that were not a concern before.

If you did not have a will before, now is the time to create one. If you did have one, review it with an attorney to make sure it reflects your new financial picture. You may also need to update your own beneficiary designations and consider whether a trust makes sense for passing the inherited assets to your children. Our overview of estate planning versus elder law helps you understand what type of attorney to work with depending on your situation.

Ignoring Jointly Inherited Assets and the Conflicts They Create

Inheriting a family home, a business, or a brokerage account with siblings introduces a layer of complexity that many people underestimate.

If you have inherited assets that are shared with other beneficiaries, such as a family home or business, neglecting the needs and wishes of your fellow beneficiaries can lead to disputes. It is important to communicate openly and work together to reach mutually agreeable decisions — for example, deciding whether to sell an inherited property, rent it out, or keep it for personal use.

These are conversations worth having early — before emotions escalate and legal fees begin. If siblings cannot agree, a mediator or probate attorney can help facilitate a resolution without court involvement.

Keeping Inherited Investments Without Reviewing Them

Inheriting a portfolio of stocks, real estate, or other investments without evaluating whether those assets make sense for your situation is a mistake that compounds over time.

It is important to review and diversify your portfolio rather than hold onto inherited investments without considering whether they align with your risk tolerance or financial goals. Inheriting a concentrated stock portfolio, for example, exposes you to significant risk if that single asset performs poorly.

Also worth understanding: when you inherit most assets, you benefit from a step-up in basis to the asset’s fair market value at the date of the original owner’s death. This means if you sell inherited property shortly after receiving it, you may owe little or no capital gains tax. Selling much later — after the value has increased — will trigger capital gains on the difference. A financial advisor can help you time these decisions strategically.

Frequently Asked Questions

Is there a deadline for making or updating an estate plan to avoid these mistakes?

 There is no legal deadline, but the right time is always now. If you become mentally incapacitated before creating a will or trust, it may no longer be legally possible to do so. Courts have ruled that documents signed when someone lacked mental capacity are invalid, which can void years of planning. Do not wait for a health crisis to force the issue.

How long does it typically take to sort out an estate that has planning mistakes in it?

 A straightforward estate with a clear will generally takes six months to one year to settle. An estate with missing documents, outdated beneficiary forms, unfunded trusts, or family disputes can drag on two to four years — and some contested estates take longer. Every month of probate costs the estate money in legal and administrative fees.

Do I need a lawyer to fix inheritance mistakes, or can I handle it myself?

 For minor updates — like changing a beneficiary designation — you may be able to do it directly with your bank or insurance company. For anything involving a will, trust, or disputed estate, an estate planning or probate attorney is essential. The cost of professional help is almost always less than the cost of getting it wrong.

What is the biggest mistake beneficiaries make with inherited retirement accounts? 

Treating an inherited IRA like a regular savings account and withdrawing everything at once. This creates an enormous tax bill in a single year. Most non-spouse beneficiaries must withdraw the full balance within 10 years, but spreading those withdrawals across the decade — and timing them around years when your income is lower — can save a significant amount in taxes.

What can parents do right now to prevent their children from making inheritance mistakes?

 Start with a conversation. Many families avoid discussing inheritance because it feels uncomfortable, but lack of communication is a leading cause of disputes, with conflicts often driven by assumptions and misunderstandings. When beneficiaries are surprised by decisions, emotions can escalate quickly. Talk to your family about your wishes. Then back those wishes up with a properly drafted will or trust.

Legal Terms Used in This Article

Intestate: Dying without a valid will. State law — not your wishes — decides who receives your assets.

Beneficiary Designation: A form on file with a bank, insurance company, or retirement account provider that names who receives that account upon your death, regardless of what your will says.

Probate: The court-supervised process of validating a will and distributing an estate. Poorly planned estates often get stuck here for months or years, losing money to legal fees along the way. Our article on why trusts end up in probate court explains how this happens even when people thought they had planned ahead.

Funding a Trust: The process of actually transferring assets — real estate, bank accounts, investments — into the name of a trust. An unfunded trust provides no protection at all.

Step-Up in Basis: A tax rule that resets the cost basis of an inherited asset to its fair market value at the date of the original owner’s death, potentially eliminating capital gains tax on appreciation that occurred before the inheritance.

Elective Share: A surviving spouse’s legal right to claim a minimum percentage of their deceased spouse’s estate, even if the will says otherwise.

Intestacy Laws: The state rules that distribute assets when there is no will, following a priority order based on blood relation.

The Bottom Line — and What to Do Next

Inheritance mistakes happen on both sides of the transaction — in the planning stage and in the receiving stage. The good news is that almost every mistake on this list is entirely preventable with the right professional guidance and a willingness to act before a crisis forces your hand.

If you are planning your estate, start with a will, fund any trust you create, and review your beneficiary designations at least every three years. If you have just received an inheritance, pause before spending, understand your tax obligations, and update your own estate plan to reflect your new financial reality.

Either way, do not try to navigate this alone. If you are dealing with an inheritance situation — whether planning one or receiving one — contact a qualified estate planning attorney for a free consultation today. Visit AllAboutLawyer.com to explore your options and protect what matters most.

Disclaimer

The information on AllAboutLawyer.com is for general informational purposes only and does not constitute legal advice. No attorney-client relationship is created. Always consult a qualified attorney regarding your specific situation. We are not responsible for any actions taken based on this content.