Estate Planning Engagement Letter: What to Include + Free Template (2026)

The engagement letter is the first document you produce in every estate planning matter, and it is the one most likely to save you in a bar complaint or fee dispute. It comes before the will, before the trust, before you ever pull up a draft. Get it right and the scope of the matter, who you represent, and what you charge are settled in writing on day one. Get it wrong and you are arguing about all three a year later, usually with a grieving family.

This guide walks through the clauses an estate planning engagement letter actually needs, the two traps that are specific to EP work (joint representation of spouses, and flat-fee scope creep), and a starter template you can adapt. One caveat up front: this is not legal advice. Engagement letter requirements are set by your state bar and your professional liability carrier. Treat everything here as a checklist to bring to your own rules, not a substitute for them.

Why the engagement letter matters in estate planning

Estate planning is unusual among practice areas. The client is often a couple, not a person. The deliverables are a bundle of documents (will, revocable trust, financial power of attorney, healthcare directive) that people casually lump together as "my estate plan," even though each has a different scope. And the matter has a long, fuzzy tail: clients call three years later assuming you still represent them when a child gets married or a parent dies.

Those features are exactly why disputes happen. A client thinks the flat fee covered funding the trust; you thought it covered drafting it. A surviving spouse claims you should have warned them about a change the other spouse made. A family argues you never closed the file, so you owed an ongoing duty. The engagement letter is where you pin down each of those questions before money or grief is involved. It is the cheapest malpractice insurance you will ever write.

The 8 sections every EP engagement letter needs

Bar rules vary, but a defensible estate planning engagement letter almost always covers these eight things. Use this as your spine and add whatever your jurisdiction requires.

1. Parties and who the client is. Name the lawyer or firm and name every client. In a couple's plan, state explicitly whether you represent both spouses jointly or only one, because that single sentence governs your duties for the rest of the matter.
2. Scope of representation. List the specific documents and tasks included (for example: will, revocable trust, durable financial POA, healthcare directive). Just as important, list what is excluded such as trust funding, tax filings, deed transfers, or business succession.
3. Fee structure. State the flat fee, what it covers, and what is billed separately. Spell out when payment is due and what happens if the matter expands beyond the quoted scope.
4. Client responsibilities. The client must provide accurate asset and family information, review drafts, and tell you about changes in circumstances. If they will not respond, you cannot finish the plan, and the letter should say so.
5. Conflicts and joint representation. For couples, describe the consequences of joint representation: no secrets between spouses, and what happens if their interests diverge. This is the clause most often missing and most often litigated.
6. Document retention. State how long you keep the file, whether you hold original signed documents or return them, and how the client can retrieve them later. Set the rule before someone needs the original will at 9pm on a Friday.
7. Termination and file closure. Define when the representation ends, ideally when the documents are signed and delivered. Make clear that you are not on a continuing retainer and that future updates are a new matter.
8. Signatures. Both the attorney and every client should sign and date. Electronic signature is fine in most jurisdictions, and a signed letter is far stronger evidence than "we discussed it."

The joint-representation trap (spouses)

Most estate planning clients arrive as a married couple, and most attorneys represent them jointly. That is efficient and usually fine, but joint representation changes your duties in ways the engagement letter has to address, or you are exposed.

The core issue is confidentiality between the spouses. Under most state rules, when you represent a couple jointly there are no secrets between them: if one spouse tells you something material, you generally cannot keep it from the other. New clients almost never understand this. The engagement letter is where you explain it in plain English and get informed consent.

You also have to address divergence. If their interests conflict (a second marriage, children from a prior relationship, one spouse wanting to change beneficiaries quietly), you may have to withdraw from representing both. Say in the letter what happens then, so it is not a surprise. Some firms add a clause permitting one spouse to disclose a future change to the other; others require withdrawal. Pick a position consistent with your bar's rules and write it down.

A quick rule of thumb

If you cannot say in one sentence whether you represent one spouse or both, and what that means for secrets between them, your engagement letter is not finished. This is the single most common gap in EP engagement letters, and it is the one a disciplinary board notices first.

Flat-fee scope language (where the money leaks)

Estate planning is usually sold as a flat fee, which clients love and which quietly bleeds attorneys who do not draw the scope line sharply. The classic leak is trust funding. You draft a beautiful revocable trust, the client assumes the flat fee includes retitling the house, the brokerage account, and the LLC interest into it, and now you are doing hours of deed and account work you never priced.

Be explicit. State whether funding is included, partially included (you prepare one deed, the client handles accounts), or excluded and billed separately. Do the same for other common add-ons: tax returns, gift tax planning, business succession, amendments after signing, and any travel for an in-home signing. The goal is that a client reading the letter knows exactly where the flat fee stops.

Also define what triggers a new fee. A useful pattern: the flat fee covers the documents listed and up to one round of revisions before signing; material changes after that, or new documents, are a new engagement at stated rates. That single sentence prevents most "but I thought that was included" arguments.

A starter template

Below is a bare skeleton to react to, not a finished letter. It is deliberately short so you can see the structure. You must adapt it to your state's rules, your carrier's requirements, and the specific matter, and have your own compliance review before you use it.

Re: Engagement for Estate Planning Services

Dear [Client Name(s)]: This letter confirms that [Firm] will represent you in preparing your estate plan.

1. Clients. We represent [you / both of you jointly]. [If joint:] Because we represent you jointly, we cannot keep information one of you shares from the other, and if your interests conflict we may have to withdraw from representing both of you.

2. Scope. We will prepare: [will, revocable trust, durable financial power of attorney, healthcare directive]. This engagement does not include [trust funding, deed transfers, tax filings, business succession] unless separately agreed in writing.

3. Fee. Our flat fee is $[amount], due [when]. The fee covers the documents above and one round of revisions before signing. Work beyond that scope is billed at $[rate]/hour or under a separate engagement.

4. Your responsibilities. You will provide complete, accurate information and review drafts promptly. We cannot complete the plan without your cooperation.

5. File and originals. We will [hold / return] original signed documents and retain the file for [X] years, after which it may be destroyed.

6. Completion. This representation ends when your documents are signed and delivered. We do not provide ongoing monitoring; future updates are a new engagement.

Please sign below to confirm. Sincerely, [Attorney]. Agreed: ______________ Date: ______

Again: this is a starting point, not legal advice. Run it against your own bar's engagement-letter rules before you send anything to a client.

Doing it without rebuilding the wheel

You do not have to assemble all of this by hand for every new client. ContractKit ships with a built-in engagement letter template, and its AI drafts the EP engagement letter for you, then drafts the underlying wills, trusts, and POAs in the same matter. The client can review and sign the engagement letter directly in the client portal, so e-sign is part of the flow rather than a separate DocuSign subscription bolted on the side. If you are weighing the signing piece specifically, see how it stacks up in our ContractKit vs DocuSign comparison.

Conflict checks, IOLTA-aware billing, and matter management live in the same place, which matters for a solo running an EP practice without a back office. For a fuller picture of tooling for one-attorney firms, our guide to estate planning software for solo attorneys goes deeper.

Frequently asked questions

Do I really need an engagement letter for a simple will?

Even a single-will matter benefits from one. The scope is small, but the questions that cause disputes (what is the fee, do you hold the original, when is the matter over) still apply. A one-page letter is cheap protection, and many carriers expect a signed engagement on every matter regardless of size.

Can both spouses sign one engagement letter?

Yes, and that is the normal approach for joint representation. The letter should name both spouses, state that you represent them jointly, and explain the confidentiality consequences before they sign. Both spouses should sign and date it.

When does the representation actually end?

Whenever your engagement letter says it does, which is why you should say it explicitly. The cleanest rule for EP work is that representation ends when the documents are signed and delivered, with a clear statement that you are not providing ongoing monitoring and that future updates are a new matter.

Should trust funding be in the flat fee?

That is your call, but the decision must be written down. Either include funding and price for it, or exclude it and say so plainly. The damage comes from leaving it ambiguous, because the client will assume it is included and you will have done the work for free.