A homemade Will might feel like a sensible shortcut—but the errors left behind can take years, and thousands of dollars, to untangle.
There is something deeply appealing about the idea of writing your own will. It seems straightforward—you know what you own, you know who you love, and plenty of websites will sell you a template for under thirty dollars. What could go wrong? Quite a lot, as it turns out. Estate attorneys regularly encounter estates that have been thrown into costly, years-long probate battles because of a single misplaced phrase, a missing witness signature, or a beneficiary designation that was simply never updated. The mistakes are not exotic. They are ordinary, and they are everywhere.
The purpose of this guide is not to frighten you away from taking ownership of your legacy. It is to illuminate the specific, recurring errors that make DIY estate plans fail—so that whether you proceed on your own or seek professional help, you do so with clear eyes.
“The most expensive document in many families’ lives was the cheap one that was never reviewed.”
A common refrain among estate litigators.
Mistake No. 1- Believing a Will Controls Everything
Many people draft a careful will, sign it properly, and assume the matter is settled. What they don’t realize is that a will only governs assets that pass through probate—and a significant portion of most people’s wealth bypasses probate entirely. Retirement accounts, life insurance policies, bank accounts with payable-on-death designations, and jointly-owned property all transfer by contract or operation of law, not by the terms of your will.
If your IRA still lists an ex-spouse as the beneficiary—and it very well might—your carefully worded will cannot override it. The account goes to whoever is named on the beneficiary form, full stop. A comprehensive estate plan treats beneficiary designations and titling as a first-class concern, not an afterthought.
Mistake No. 2- Signing a Will Without Proper Witnesses or Notarization
Requirements for a valid will vary by state, but virtually every jurisdiction demands at least two disinterested witnesses present at the moment of signing—meaning witnesses who stand to inherit nothing. Some states also require a self-proving affidavit, notarized at signing, to spare your executor from having to track down those witnesses after your death.
Online will templates routinely omit these instructions or bury them in fine print. A will signed alone at the kitchen table, even if its words are perfectly clear, may be declared invalid by a probate court. At that point, your state’s intestacy laws—not your wishes—determine who inherits your estate.
Mistake No. 3- Using Ambiguous or Legally Imprecise Language
Plain language is a virtue in most writing. In a legal document, imprecision can ignite family conflict. Phrases like “I leave my personal property to be divided equally among my children” seem clear until the question arises: does a car count? A watch collection? Digital assets? Does “equally” mean by number of items or by monetary value?
Courts interpret ambiguous language according to precedent, not intent. Your family may spend years and substantial legal fees resolving disputes you never imagined. Proper drafting uses precise terminology that has established legal meaning and anticipates the hard questions before they arise.
Mistake No. 4- Failing to Plan for Incapacity
A will speaks only at death. It offers no guidance for the period—which can last years—during which you may be alive but unable to manage your own affairs. Without a durable financial power of attorney and a healthcare directive (often called a living will or healthcare proxy), your family may be forced to petition a court for guardianship before they can pay your bills, sell an asset on your behalf, or make a medical decision.
Guardianship proceedings are expensive, public, and emotionally draining. They are also entirely avoidable with two documents that take perhaps an hour to execute properly. DIY estate plans frequently omit both.
Mistake No. 5- Never Updating the Plan After Major Life Events
An estate plan is not a one-time filing. It is a living document that must keep pace with your life. Marriage, divorce, the birth of a child or grandchild, the death of a named beneficiary, a significant change in assets, or a move to a different state can all render an existing plan outdated or actively harmful.
Homemade plans are particularly vulnerable here because there is no professional relationship prompting periodic review. The will drafted after a first marriage, intended to benefit a spouse who is now an ex-spouse, may still be sitting in a filing cabinet—legally valid and completely at odds with your current wishes. Make a habit of reviewing your plan every three to five years and immediately after any major life change.
Mistake No. 6- Overlooking Digital Assets and Online Accounts
Cryptocurrency wallets, online brokerage accounts, email archives, social media profiles, and cloud-stored photographs represent a new category of assets that most template-based wills were never designed to address. Without documented access credentials and explicit instructions, these assets can be permanently lost or locked after your death—or worse, become the subject of legal disputes when multiple family members claim access.
A thorough estate plan inventories digital assets, specifies how access should be granted, and addresses what should happen to each one. This is an area where even recently drafted DIY plans frequently fall short.
The Bottom Line
None of these mistakes require malicious intent or unusual complexity to occur. They happen to careful, thoughtful people every day—simply because estate planning sits at the intersection of law, finance, family dynamics, and mortality, and that intersection deserves more than a template. Even a modest consultation with an estate attorney can catch the errors most likely to matter. Your estate plan is one of the most consequential documents you will ever create. It deserves to be right.
Founded by a nurse attorney and with offices in Acton, Andover, and Sudbury, Massachusetts, Generations Law Group helps families navigate the complex areas of estate planning and elder law to inform and protect loved ones of every generation.
