7 Estate Planning Mistakes Tearing Families Apart Right Now
Madison Partners
A woman in Texas sued her father’s former employer after his retirement plan paid $400,000 to his ex-wife the beneficiary he’d named decades earlier and never updated. She lost. The case went all the way to the Supreme Court, and the ruling was unanimous: the plan had to follow the paperwork, not the divorce decree.
That’s the thing about estate planning mistakes. They don’t reveal themselves in your lifetime. They show up after you’re gone, when your family is already grieving and suddenly learning the will they thought was settled isn’t settled at all.
Here are seven of the most common estate planning mistakes tearing families apart right now and exactly what to do about each one before it’s your family’s story.
The most damaging estate planning mistakes aren’t rare or exotic — they’re ordinary ones most people don’t realize they’re making. Outdated beneficiary designations, missing or stale wills, relying on a will alone (which still sends your estate through probate), skipping powers of attorney, ignoring digital assets, never telling family where the documents are, and failing to plan for state-level estate taxes are the issues that quietly drain inheritances and fracture families. Fixing them takes hours, not years — and almost always costs less than the price of getting it wrong.
1
Letting beneficiary designations quietly override your will
Your will doesn’t control your 401(k), IRA, or life insurance. The beneficiary form you filled out maybe the day you started the job, maybe before you got married or divorced does. And if that form is outdated, it wins. Every time.
The Supreme Court settled this in 2009 in Kennedy v. DuPont. William Kennedy had named his wife Liv as the beneficiary of his DuPont savings plan in 1974. They divorced in 1994, and the decree said Liv gave up her claim to his retirement benefits. William never updated the beneficiary form. When he died, the plan paid Liv roughly $400,000, not his estate, not his daughter. The justices, unanimously, said the plan had to follow its own documents.
Pull every beneficiary form — retirement accounts, life insurance, annuities, HSAs, transfer-on-death accounts — and read them with fresh eyes. Do it after any marriage, divorce, birth, or death in the family. A 15-minute phone call with your plan administrator can prevent a six-figure mistake.
2
Not having a will at all or having one that’s 20 years old
As of 2025, only 24% of American adults have a will, down from 33% in 2022, according to Caring.com’s annual wills study.
Without a will, state intestacy law decides who gets what and those formulas don’t know you. They don’t know that your son-in-law handled your mother’s care for five years, or that you want your sister’s kids to share equally with yours. They follow a cold legal checklist, and they often produce results you’d hate.
Having a will is only half the job. An old will can be worse than none at all, naming an executor who’s died, leaving assets to a child who’s now estranged, or using trust language that tax law has since rewritten. The IRS permanently raised the federal estate tax exemption to $15 million per person for 2026 under the One Big Beautiful Bill Act, which means some bypass-trust provisions written before 2018 may now produce exactly the opposite of what you intended.
Sources: Caring.com 2025 Wills and Estate Planning Study; IRS Tax Inflation Adjustments for 2026
Review your will every 3–5 years, and after any major life event.
3
Assuming a will alone will keep your family out of probate
Here’s what most people don’t know: a will doesn’t avoid probate. A will is a set of instructions for probate. The court still has to validate it, notify creditors, inventory assets, and supervise the distribution.
The American Bar Association has cited AARP data putting typical probate costs around $1,500, but that’s a floor, not a ceiling. Industry estimates commonly put combined probate expenses attorney fees, executor compensation, court costs, appraisals, and bond premiums at 3% to 8% of an estate’s gross value, depending on state, complexity, and whether anyone contests. On a $500,000 estate, that’s $15,000 to $40,000 that never reaches your heirs.
A revocable living trust, properly funded during your lifetime, sidesteps probate for the assets it holds. So do beneficiary designations, transfer-on-death accounts, and jointly titled property. The trap people fall into is creating a trust and then never moving assets into it, leaving their family with an unfunded document and a full-length probate anyway.
Sources: American Bar Association; Settled, Probate Costs Explained
4
Leaving no one in charge if you can’t decide for yourself
Estate planning isn’t only about what happens after you die. It’s also about what happens if you’re alive but can’t speak for yourself a stroke, a serious accident, dementia. Without a durable power of attorney and a healthcare directive, your family may need to go to court just to access your accounts or direct your medical care.
This is the mistake that creates the most day-to-day pain. A probate judge can appoint a guardian or conservator, but the process takes months, costs thousands, becomes a matter of public record, and strips your family of privacy and speed exactly when they need both. The AARP’s policy guidance is blunt about this gap: powers of attorney and advance directives are as important as the will itself, and many people who draft them never complete the signing and witnessing requirements to make them valid.
Source: AARP Policy Book on Estate Planning
A complete estate plan has four cornerstones — a will, a revocable trust (for most people with real estate or meaningful assets), a durable financial power of attorney, and a healthcare directive with a HIPAA release. Missing any one of them is a gap.
Only about 1 in 4 American adults has a will. Far fewer have the full set of documents that actually protects a family in a crisis.
5
Planning for federal estate tax and forgetting your state’s
Most people hear “estate tax” and think of the federal exemption. For 2026, that number is a generous $15 million per person or $30 million for a married couple using portability under permanent law from the One Big Beautiful Bill Act.
So federal estate tax is a problem for a tiny slice of Americans. But state-level death taxes are a completely different story. As of 2026, 12 states and the District of Columbia impose a state estate tax, and five states impose an inheritance tax (Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania). Maryland is the only state that levies both.
The exemptions at the state level are far lower than federal. Oregon and Massachusetts start taxing estates at $1 million and $2 million respectively. Rhode Island’s 2026 exemption is roughly $1.84 million. In Pennsylvania, your children pay a 4.5% inheritance tax on what they receive from you including the balance of a traditional IRA, on top of the income tax they already owe on withdrawals.
Sources: IRS, Tax Inflation Adjustments 2026; Tax Foundation, Estate and Inheritance Taxes by State
Assuming federal rules are the whole picture. If you live in — or own property in — a state with its own death tax, plan for that first. It’s the more likely hit by far.
6
Ignoring digital assets, business interests, and the “other stuff”
A well-drafted will handles your house and your brokerage account. It often completely misses the rest of your financial life.
Think about what lives on your phone: email, photos, a password manager, domain names, crypto wallets, PayPal and Venmo, loyalty points, frequent-flyer miles, your LLC’s online banking, a small Shopify store, and the social accounts your grandchildren may want to memorialize. Without documented access and legal authority, your executor may spend months or fail entirely to reach them. Some balances simply evaporate.
The same is true for closely held business interests. A buy-sell agreement or a properly titled succession plan can be the difference between your business surviving your death and your family being forced to liquidate at a discount.
Keep a secure, updated inventory of digital accounts and access credentials (a password manager with an “emergency access” feature works), and make sure your will and power of attorney explicitly grant your fiduciaries authority over digital assets under your state’s version of RUFADAA — the Revised Uniform Fiduciary Access to Digital Assets Act, now adopted in almost every state.
7
Never telling anyone the plan exists or where to find it
This may be the most preventable mistake on the list. You can have the best-drafted estate plan in the country, but if no one knows it exists, or no one can find it, it may as well not.
Families routinely discover original wills in safe deposit boxes the executor can’t legally open, or in attorneys’ offices that closed years ago, or on a home computer protected by a password no one else knows. Meanwhile, probate moves forward as if the document never existed.
Tell your executor by name that you’ve chosen them. Tell your successor trustee. Tell your healthcare agent. Give them (or at minimum tell them how to reach) the attorney who holds your documents. A one-page “letter of instruction” listing where the will, trust, insurance policies, account statements, digital password vault, and safe deposit key are kept is, dollar for dollar, the highest value piece of paper in your plan.
Have one direct conversation with each person you’ve named. Awkward for ten minutes. Priceless later.
Common Questions
What’s the difference between a will and a living trust?
A will takes effect only at death and goes through probate a public court process that can cost 3% to 8% of the estate and take 6 to 24 months. A revocable living trust takes effect the moment you sign and fund it, stays private, avoids probate for assets it holds, and can keep managing those assets if you become incapacitated. Most people with real estate or meaningful financial assets benefit from having both, each playing a different role.
Do I need an estate plan if my estate is below the federal exemption?
Yes. The federal estate tax exemption is $15 million per person for 2026, so most families won’t owe federal estate tax. But estate planning is mainly about control, clarity, and avoiding probate not tax. It determines who raises your minor children, who makes medical decisions if you’re incapacitated, how retirement accounts pass to heirs, and whether your family spends months in court. Those matter regardless of net worth.
How often should I update my estate plan?
Review it every 3 to 5 years at minimum, and after any of these: marriage, divorce, birth, adoption, death of a named person, a significant change in assets, a move to a new state, or a major change in tax law and the 2025 One Big Beautiful Bill Act was one of those. If your last documents are more than a decade old, they almost certainly need updating.
Can I just use an online will service?
For a simple, single-state, modest-asset situation, an online service can produce a valid document. Where online tools fall short is integration: coordinating beneficiary designations with trust funding, drafting around state estate tax, handling blended families, business interests, real estate in multiple states, or special-needs beneficiaries. Those are the cases where a competent estate attorney pays for themselves many times over.
What happens if I die without any estate planning documents?
Your state’s intestacy laws decide who inherits, usually a fixed formula based on family relationships and a probate judge appoints your estate’s administrator and, if you have minor children and no surviving parent, their guardian. The process is public, often slower and more expensive than with a plan, and rarely produces the result you would have chosen. Between 50% and 70% of Americans die this way.
Source: Caring.com 2025 Wills Study
Where to go from here
Rules of thumb only get you so far. Estate planning is personal by definition your family, your assets, your state, your intentions and the mistakes on this list rarely show up one at a time. They tend to cluster. If you’d like to talk through how any of this fits your specific situation, the team at Madison Partners is happy to have that conversation.
This content is for educational purposes only and should not be considered financial, tax, legal, or investment advice. Individual circumstances vary, and readers should consult with a qualified financial advisor, tax professional, or attorney before making decisions based on this information. Madison Partners does not guarantee the accuracy of third-party data cited herein.
