Disengagement Letter Template: 5 Samples for Tax Firms

A disengagement letter is the written notice that ends your work for a client on a stated date, lists what the client must now handle, and says how they get their records back. Send it whenever a relationship ends, including when the client simply stopped answering. Below are five templates, from a completed engagement to the client who never sent their documents, plus what the records and power-of-attorney rules require before you send any of them.

Most of what follows comes from insurer guidance built for exactly this letter, not a generic business-letter format. See the client onboarding checklist for accountants for the other end of the relationship, DokuTrak for accountants if the client you're about to disengage is also the client you're tired of chasing, or the follow-up email templates if a better-worded reminder could still save the engagement before you disengage.

This is general information, not legal advice. Check your engagement letter, your state's rules, and your professional-liability carrier's guidance before you send anything below.

At a glance

• Template 1: engagement completed cleanly
• Template 2: client never sent the documents
• Template 3: unpaid fees
• Template 4: non-engagement letter, for declining a prospect
• Template 5: withdrawing mid-season, extension or not
• Insurer guidance says state the facts, not the reason. Client-provided records go back even if fees are unpaid. Any IRS power of attorney has to be withdrawn separately — it doesn't lapse on its own.

What is a disengagement letter?

A disengagement letter is the written notice a tax, bookkeeping, or accounting firm sends to formally end an engagement: it states an effective date, says which services stop, and tells the client what they must now do. It differs from a non-engagement letter, which declines a prospect before any engagement starts (no prior records or fees to address), and from an engagement letter, which opens a relationship rather than closing one.

What every disengagement letter must include

A disengagement letter needs an effective date, a clear statement that services end, the deadlines the client must now meet on their own, any fees or records outstanding, and how it will be delivered so you can prove the client received it. CPAI, the AICPA's member insurance program, publishes the standard list professional-liability carriers point firms to.¹

One thing CPAI explicitly recommends leaving out: the reason. "It is not recommended to include the reason for termination. The letter should simply and directly inform the client that you will no longer provide services to them."¹ State the facts the client needs to act on, not the story of why you're done.

Five disengagement letter templates

Each template below is a starting block, not a finished letter. Replace every [BRACKET], check it against your own engagement letter and state rules, and keep a copy in the client file.

Template 1: Engagement completed

Use when the work is simply finished and the relationship ends cleanly.

Dear [CLIENT NAME],

This letter confirms that our engagement to [SERVICE, e.g., "prepare your
2025 individual income tax return"] is complete, and our professional
relationship ends effective [DATE]. We have no further obligations under
this engagement.

Your records are [enclosed / available for pickup / available at [LINK] until
[DATE]]. [If applicable: We are withdrawing our power of attorney (IRS Form
2848) for your account, effective [DATE].]

Thank you for the opportunity to work with you. We wish you well.

[FIRM NAME]

Watch out: if you're keeping any firm work product back (your own schedules, drafts), say so explicitly — the client's own records still have to go.

Template 2: Client never sent the documents

Use when you requested a document packet, followed up, and the client went quiet before a filing deadline.

Dear [CLIENT NAME],

On [DATE] we requested the following items to complete your [YEAR] return:
[LIST]. We followed up on [DATE(S)]. As of [DATE] we have not received them.

We are closing our engagement effective [DATE]. We will not prepare or file
your [YEAR] return. [If applicable: An extension was filed on your behalf,
and your extended deadline is [DATE]. / No extension was filed; your
original deadline of [DEADLINE] still applies.]

For your next preparer, the items still outstanding are: [LIST]. Any records
we hold are [enclosed / available at [LINK] until [DATE]]. [If applicable:
We are withdrawing our power of attorney (IRS Form 2848), effective [DATE].]

Please engage another preparer promptly given the approaching deadline.

[FIRM NAME]

Optional: replace the outstanding-items list with a single neutral line — "We have not received the information needed to complete the engagement" — if you'd rather not itemize. The list isn't an accusation; it's so the next preparer doesn't start from zero.

Watch out: don't send this the week of the deadline. By the time you've written it, the client needs the runway more than you need the paper trail.

Template 3: Unpaid fees

Use when the engagement is stalled on an outstanding balance, not missing documents.

Dear [CLIENT NAME],

Our records show an outstanding balance of [$AMOUNT] for services through
[DATE]. We are closing our engagement effective [DATE].

Records you provided to us are [enclosed / available at [LINK]] regardless
of this balance. [If applicable: Firm work product for unpaid services,
such as [DESCRIPTION], will be released once the balance is paid, consistent
with our engagement letter and applicable rules.] [If applicable: We are
withdrawing our power of attorney (IRS Form 2848), effective [DATE].]

Please contact us about settling the balance, and please engage another
professional promptly for any ongoing needs.

[FIRM NAME]

Watch out: this is a statement of balance and date, not a threat. Client-provided records go back regardless of the balance — only your own unpaid work product can be held, and only where your rules allow it (see records and power of attorney below).

Template 4: Non-engagement letter (declining a prospect)

Use when someone inquired but you never started the engagement.

Dear [PROSPECT NAME],

Thank you for reaching out about [SERVICE]. After review, we will not be
able to represent you or prepare your [YEAR] return.

We have not reviewed your tax situation and are not providing any advice
based on the information you shared. Deadlines may apply to your filing;
please seek another professional promptly. [If applicable: We are returning
the documents you provided, enclosed / at [LINK].]

We wish you the best in finding the right fit.

[FIRM NAME]

If you're an attorney declining a prospective client, see the Nevada State Bar's sample non-engagement letters rather than adapting this one.⁴

Template 5: Withdrawing mid-season

Use when you need to stop partway through, with an extension already filed or not.

Dear [CLIENT NAME],

We are withdrawing from our engagement to prepare your [YEAR] return,
effective [DATE].

[If an extension was filed by us: We filed an extension on your behalf;
your extended due date is [DATE]. Any payment due was owed by the original
deadline of [ORIGINAL DATE], regardless of the extension.]
[If no extension was filed: Your original filing deadline of [DATE] applies.
We are not filing an extension on your behalf.]

Your records are [enclosed / available at [LINK] until [DATE]]. We are
withdrawing our power of attorney (IRS Form 2848), effective [DATE].

Please engage another preparer promptly given the approaching deadline.

[FIRM NAME]

Watch out: the extension-but-no-payment distinction matters. An extension moves the filing deadline, not the payment deadline, and the client needs to hear that explicitly or they'll assume both moved.

Each of the templates above is general information, not legal advice. Adapt it to your engagement letter, your state's rules, and your professional standards.

Returning records and withdrawing your power of attorney

You generally have to return client-provided records even if fees are unpaid, and you have to formally withdraw any IRS power of attorney — it doesn't lapse on its own when you stop working for the client.

Records. Circular 230 §10.28(a) requires a practitioner to "promptly return any and all records of the client that are necessary for the client to comply with his or her Federal tax obligations" when the client asks, and a fee dispute doesn't excuse it — only some states allow holding back the subset of records that must be attached to the return itself.² "Records of the client" covers documents the client gave you or that you obtained on their behalf, and excludes your own prepared returns or schedules if you're withholding those specifically pending payment for that work.² For AICPA members, the Code's records-requests interpretation goes further: you can't withhold client-provided records on an initial request for unpaid fees at all; you may charge for copying, retrieval, and shipping, and may hold records back for payment only if those exact records were already furnished to the client once before.⁵

Power of attorney. If you ever filed Form 2848 for this client, closing the engagement doesn't remove you as their IRS representative — you have to withdraw it. Per the form's instructions: "If your representative wants to withdraw from representation, he or she must write 'WITHDRAW' across the top of the first page of the power of attorney with a current signature and date below the annotation," then send it the same way the original was filed, or send a withdrawal statement naming the matters, years, taxpayer, and TIN.³

Checklist before you close the file: list what the client gave you → return it or make it available, even if fees are unpaid → keep your own copies → withdraw Form 2848 → turn off the client's access to any shared folder or upload link → note the date sent and keep proof of receipt.

How to send it

Send a hard copy by a method that proves the client received it: certified mail with return receipt, overnight delivery with a receipt, or a courier service. CPAI's own framing: "sending a hard copy of the letter by a traceable method that evidences delivery and receipt is the recommended practice," reserving email for time-sensitive situations and following it with a hard copy when you do.¹ Keep a copy in the client file either way — the letter is only useful as proof of when the relationship ended if you can show it arrived.

For attorneys: use your state bar's samples

If you're an attorney, don't adapt a tax-firm template — your withdrawal is governed by your state's version of ABA Model Rule 1.16, not accounting guidance. Model Rule 1.16(b)(5) permits withdrawal when a client "fails substantially to fulfill an obligation to the lawyer regarding the lawyer's services and has been given reasonable warning that the lawyer will withdraw unless the obligation is fulfilled," and 1.16(d) requires "reasonable notice," time for the client to find new counsel, surrendering papers and property the client is entitled to, and refunding any unearned advance payment.⁶ That's a model rule, not your state's — check your jurisdiction. The State Bar of Nevada publishes sample disengagement and non-engagement letters built for attorneys,⁴ and the Louisiana⁴ and Texas⁴ bars publish their own closing-letter guidance.

Before you send Template 2: was the request clear?

Template 2 is the one nobody wants to send. Before you do, it's worth checking whether the request itself gave the client an easy way to respond: one list, one link, reminders that go out without you chasing. I built DokuTrak around that gap — it sends the request, reminds the client on a schedule (by default 2, 5, 10, and 14 days after the request), and every reminder shows in the request's activity, marked delivered or failed, next to the last time the client opened the link. It isn't proof of anything in a legal sense, but if you still end up sending Template 2, you'll have the dates for its first paragraph instead of guessing from memory.

See how to stop chasing clients for documents for the system behind that, or the document request email templates for what the reminders themselves can say.

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Sources

Footnotes

1. CPAI (AICPA Member Insurance Programs), "How to Write a Client Termination Letter" (original publish date July 24, 2026, last modified September 17, 2026). https://www.cpai.com/Education-Resources/my-firm/Acceptance-Continuance-and-Termination/Client-Termination-Letters ↩ ↩² ↩³ ↩⁴ ↩⁵ ↩⁶ ↩⁷ ↩⁸ ↩⁹ ↩¹⁰

2. 31 CFR §10.28, Circular 230, via Cornell Legal Information Institute. https://www.law.cornell.edu/cfr/text/31/10.28 ↩ ↩² ↩³

3. Internal Revenue Service, "Instructions for Form 2848" (revised 09/2021). https://www.irs.gov/instructions/i2848 ↩ ↩²

4. State Bar of Nevada, sample disengagement letters (PDF), https://nvbar.org/wp-content/uploads/sample-disengagement-letters-2-nv.pdf, and sample non-engagement letters (PDF), https://nvbar.org/wp-content/uploads/Sample-Non-Engagement-Letters-3-NV.pdf; Louisiana State Bar Association, Practice Aid Guide, ch. 7, https://www.lsba.org/documents/PracticeAidGuide2/S07Whole.pdf; Texas Bar Practice, "Disengagement Letter: Closing Letter" (sample forms collection), https://www.texasbarpractice.com/law-practice-management/attorney-fee-agreements/ ↩ ↩² ↩³ ↩⁴

5. AICPA Code of Professional Conduct, ET §1.400.200 "Records Requests" (revised interpretation, effective July 31, 2021), as reported in Journal of Accountancy, "PEEC addresses 'Records Requests,' limits on loaning staff to attest clients" (March 2021). https://www.journalofaccountancy.com/news/2021/mar/aicpa-professional-ethics-records-requests-limits-on-loaning-staff/ ↩

6. American Bar Association, Model Rules of Professional Conduct, Rule 1.16 "Declining or Terminating Representation." https://www.americanbar.org/groups/professional_responsibility/publications/model_rules_of_professional_conduct/rule_1_16_declining_or_terminating_representation/ ↩