How to Avoid the 5 Most Common Trustee Mistakes

Mistake #1: Not Reading the Trust Document First

The trust document is not a formality. It is the governing rulebook for everything you are about to do. Every distribution you make, every investment decision you execute, every deadline you must meet — all of it flows from the specific language in that document. Nothing else comes close to mattering as much.

Yet one of the most common mistakes new trustees make is skipping straight to action — transferring accounts, writing checks, selling property — without first sitting down and reading the document from front to back.

Here's why that's dangerous: the trust document specifies who is entitled to distributions and when, whether those distributions are mandatory or at your discretion, what conditions a beneficiary must meet before receiving anything, and what powers you actually have as trustee. Make an unauthorized distribution to one beneficiary before reading the document, and you may have violated the rights of another. Miss a mandatory distribution deadline, and you've breached your fiduciary duty.

Before you write a single check or move a single dollar, read the entire trust. Pay special attention to the distribution provisions, trustee powers, and any conditions tied to specific beneficiaries. Not sure how to make sense of the legal language? Our guide on how to read a trust document breaks it down section by section.

The governing document of a living trust is different from a will — it doesn't go through probate, and there's no court oversight to catch your errors. That means you, as trustee, are the last line of protection for the beneficiaries. Read the document first.

Mistake #2: Mixing Trust Assets with Personal Assets

This is not a technicality. Co-mingling trust assets with your personal assets is a fiduciary violation — and courts take it seriously.

Co-mingling means treating trust money as though it's interchangeable with your own. It can look like depositing trust income into your personal checking account “temporarily,” paying trust expenses from your personal debit card and planning to reimburse yourself later, or keeping trust investment accounts under your personal Social Security number instead of the trust's EIN.

The problem is that once trust funds mix with personal funds, it becomes nearly impossible to prove where money went and for what purpose. If a beneficiary challenges your administration — or if there's ever a lawsuit — you will be unable to document your decisions. Courts interpret that inability as evidence of mismanagement or self-dealing, even if your intentions were completely honest.

From day one, the trust needs its own infrastructure:

• Its own bank accounts, opened in the name of the trust
• Its own investment accounts, titled correctly
• Its own EIN (Employer Identification Number), not your SSN
• Its own paper trail — every transaction documented separately from your personal finances

Any expenses you incur on behalf of the trust — attorney fees, accounting fees, property maintenance — should be paid from trust accounts and documented with receipts. If you advance personal funds for a trust expense, reimburse yourself promptly and document the reimbursement.

The rule is simple: trust money is not your money. It belongs to the beneficiaries. Treat it accordingly.

Mistake #3: Failing to Communicate with Beneficiaries

Beneficiaries have legal rights to information about the trust. They are entitled to know that the trust exists, that they are named as a beneficiary, and — in most states — to receive a copy of the trust document or at least a summary of its terms. In many states, trustees are required by law to send formal notice to beneficiaries within 60 days of assuming their role.

Trustees who go quiet — even with good intentions — create two serious problems. First, they create distrust. Beneficiaries who aren't kept informed start to wonder what's being hidden. Speculation fills the void, and relationships that were already strained by grief deteriorate further. Second, they create legal exposure. A trustee who fails to provide required notices or accountings has breached their fiduciary duty, regardless of whether the underlying administration was actually sound.

Here is what beneficiary communication typically looks like in practice:

• Initial notice: Written notification to all beneficiaries that you have assumed the role of trustee and that the trust is now in administration.
• Trust summary or copy: Depending on your state, you may be required to provide each beneficiary with a copy of the relevant portions of the trust document.
• Annual accountings: A summary of trust income, expenses, and distributions during the year. Some trusts require formal accountings; others require them only on request.
• Distribution notices: Documentation of any distributions made, to whom, and when.
• Responses to beneficiary inquiries: Beneficiaries who request information are generally entitled to receive it within a reasonable time.

The specific requirements vary significantly by state. When in doubt, communicate more, not less. A trustee who keeps beneficiaries informed and documented is a trustee who can defend their administration if it's ever challenged.

Mistake #4: Ignoring Tax Filing Requirements

Taxes are the most commonly overlooked part of trust administration — and the penalties for getting them wrong fall on you personally.

Most people understand that a deceased person's final income tax return needs to be filed. What they don't realize is that a trust often has its own entirely separate tax obligations that begin the moment the grantor dies.

Here is what you likely need to address:

Tax administration for trusts is genuinely complex. Most trustees hire a CPA experienced in fiduciary tax returns — and the cost of doing so is almost always less than the cost of getting it wrong, which can mean penalties, interest, and personal liability.

Mistake #5: Not Keeping Detailed Records

As trustee, you can be held personally liable for decisions you cannot document. This is not a hypothetical — it is one of the most common sources of trustee liability in contested administrations.

The standard for record-keeping is higher than most people expect. It's not enough to know that you made a reasonable decision. You have to be able to prove it — months or years after the fact, to a court or to beneficiaries who may no longer trust you.

Here is what thorough trustee records look like:

• All financial transactions: Every deposit, withdrawal, transfer, payment, and distribution — with dates, amounts, accounts, and purpose.
• All communications with beneficiaries: Emails, letters, meeting notes. If a beneficiary calls to request a distribution, document that call. If you decline, document why.
• Investment decisions: What you bought, what you sold, why, and when. If you used a financial advisor, keep their written recommendations.
• All receipts and invoices: Every expense paid from trust funds — attorney fees, accounting fees, property maintenance, appraisals, court costs.
• Copies of all notices sent: Every communication sent to beneficiaries, along with proof of delivery where possible.
• Professional advice received: If an attorney or CPA told you to take a specific action, keep that advice in writing. Acting on professional advice is a strong defense against later challenges.

The general rule: if you made a decision as trustee, there should be a document that explains it. If you spent trust money, there should be a receipt. If you communicated with a beneficiary, there should be a record.

Many trustees keep a simple administration binder — organized by category — throughout the administration period. It takes less time than dealing with a beneficiary lawsuit. When the administration is finally complete and the beneficiaries sign off on the final accounting, that binder is your proof that everything was done correctly.

Being Named Trustee Is an Honor — and a Legal Responsibility

Someone trusted you enough to put you in charge of protecting their legacy and their family. That trust is meaningful. But it comes with real legal weight — and most people step into the role without realizing how much they don't know.

The five mistakes above — skipping the trust document, co-mingling assets, going quiet on beneficiaries, ignoring tax obligations, and failing to document decisions — are not the result of bad intentions. They are the result of not knowing what the job actually requires.

The best thing a new trustee can do is educate themselves before they make their first move. Read the trust document. Open separate accounts. Send the initial notice to beneficiaries. Find a CPA who handles fiduciary returns. Start your records file on day one.

Understanding the difference between a will and a trust — and specifically what it means to administer one — puts you in a fundamentally different position than the trustee who wings it. The beneficiaries in your care deserve the prepared version of you.

This guide was created by Jacqueline Jimenez, CTFA (Certified Trust and Financial Advisor) of Boricua Legacy Publishing Company. It is for educational purposes only and does not constitute legal or tax advice. If you are acting as a trustee in a complex situation, consult a licensed estate planning attorney.