Short answer: A letter of intent is a private, non-binding document where you explain your wishes and your reasoning to your executor, trustee, and family. It has no legal force in California and cannot override your will or trust. What it does well is fill in what those documents cannot: why you made a certain choice, where to find things, who gets the specific heirloom, and what you want for a child, pet, or dependent who needs extra care. Write it alongside a properly executed will or trust, never as a substitute for one.
What is a letter of intent in estate planning?
A letter of intent is a personal document you write and keep with your estate planning papers. It is not a form filed anywhere and not part of your will or trust. Think of it as a set of instructions and explanations addressed to the people who will carry out your wishes: your executor if you go through probate, your successor trustee if you have a trust, and the family members who will be affected by your decisions.
Because it sits outside the formal legal documents, you can write it in plain language, update it whenever you want, and be as specific or as personal as you like. That flexibility is the whole point. Your will or trust says who gets what. A letter of intent can say why, and can cover the smaller things a legal document was never built to handle.
Is a letter of intent legally binding in California?
No. A letter of intent is not a will, not a trust amendment, and not enforceable in a California probate or trust proceeding. If it conflicts with your will or trust, the will or trust controls. Your executor or trustee answers to the governing legal document, not to a letter you left in a drawer.
That does not make the letter pointless. In practice, executors and family members generally treat a clear, well-written letter as strong guidance and follow it, particularly when it explains the reasoning behind a decision rather than just repeating an instruction. A letter that says “the china goes to Susan because she is the one who asked for it years ago and has the space” does more to prevent an argument than the china’s mention in the trust ever could.
What should a letter of intent cover?
There is no required format. The most useful letters tend to cover a consistent set of ground:
- The reasoning behind uneven distributions, so beneficiaries understand a choice was deliberate and not an oversight
- Instructions for specific personal property, heirlooms, or sentimental items that a will or trust often lumps together as “personal effects”
- Guidance for the care of minor children, a family member with a disability, or a pet, beyond who has legal guardianship or custody
- Practical information: where to find accounts, keys, safe deposit boxes, digital passwords, and other documents your executor or trustee will need
- Your wishes for a funeral, memorial, or how you would like to be remembered, since these often are not addressed in a will at all
- Context on family history or relationships that explains a decision without requiring anyone to ask why
Keep it specific. A letter that says “be fair to everyone” does nothing. A letter that names the person, the item, and the reason gives your executor or trustee something they can actually act on and something your family can actually read and accept.
How does a letter of intent work alongside a will or trust?
Your will or trust is the document that legally moves property from your name into someone else’s. A letter of intent never does that. It works alongside the legal document, not inside it. Keep it with your original estate planning documents, tell your executor or successor trustee where to find it, and make sure it does not contradict what your will or trust actually says. If your circumstances change and your written wishes no longer match your letter, update the letter, and check whether the underlying document needs updating too.
If you have not yet put a will or trust in place, the letter of intent is not where to start. Get the estate plan itself done first. A letter of intent has real value, but only as a companion to documents that actually carry legal weight.
When should you write one, and how often should you update it?
Write it whenever you finish your will or trust, and revisit it any time your family situation changes: a new grandchild, a divorce, a falling out, a move, or a decision to change how an asset gets divided. Because it is not a formal legal document, there is nothing stopping you from rewriting it as often as you want. Date each version and destroy the old ones so your executor is not left guessing which version reflects your current wishes.
What to do next
If you already have a will or trust in place, a letter of intent is a low-effort addition that can prevent real friction among the people you leave behind. If you do not yet have your core documents done, talk to an estate planning attorney about getting those in place first. Once the legal framework exists, the letter of intent is the part you can write yourself, in your own words, whenever you are ready.
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