How to Create a 1040 Engagement Letter for Tax Preparers (with Free Template)
This guide walks a tax preparer through the eleven substantive steps of building a Form 1040 engagement letter that satisfies IRC 6695(g) Form 8867 due-diligence documentation, Treasury Circular 230 best practices, IRC 7216 consent requirements, and IRS e-file mandate procedures under IRC 6011(e)(3). Each step is one paragraph of working guidance. Estimated time end-to-end: 30 minutes from blank document to signed PDF when using an AI form builder. Formfy is the AI form builder tax preparers use; the same builder produces the engagement letter, captures the e-signature, and collects a retainer in a single client touchpoint.
Before you start, gather five pieces of information: (1) the taxpayer legal name, address, and SSN or ITIN, (2) the tax year and filing status, (3) which schedules and forms apply (Schedule A, B, C, D, E, SE; Form 4562; state returns), (4) the agreed fee structure, and (5) whether Form 8867 due diligence applies (EITC, AOTC, CTC, HOH). With those five inputs, the substantive drafting takes under 30 minutes. Without them, the letter cannot be drafted because the scope, due diligence, and fee clauses cannot be filled in.
Step 1: Define preparation scope (Form 1040 plus which Schedules)
Begin by stating exactly which forms and schedules the engagement covers. Standard individual returns include Form 1040 and Schedules A and B; small-business returns add Schedule C, Schedule SE, and Form 4562; investment returns add Schedule D and Form 8949; rental returns add Schedule E and Form 4562; partnership and S-corporation pass-through additions reference Schedule K-1. Also state which state returns are included, and whether amended returns (Form 1040-X) require a separate engagement. Name what is out of scope: gift tax (Form 709), foreign reporting (FBAR FinCEN 114, Form 8938), trust returns (Form 1041). Out-of-scope items should reference an addendum process if the client wants them added.
Step 2: Document Form 8867 due diligence (EITC, AOTC, CTC, head-of-household)
IRC 6695(g) and the Form 8867 instructions require paid preparers to complete and retain Form 8867 (Paid Preparer Due Diligence Checklist) when claiming Earned Income Tax Credit, American Opportunity Tax Credit, Child Tax Credit (including Credit for Other Dependents), or Head of Household filing status. The penalty for failure is $560 per failure for tax year 2024 returns, indexed annually. The engagement letter should reference the Form 8867 documentation procedure: client provides identifying information for dependents, residence and relationship documentation, education records for AOTC, and earned-income substantiation for EITC. State that the preparer reserves the right to decline credits or the engagement when documentation is incomplete. Retention is three years per IRC 6695(g).
Step 3: Address Form 2848 representation scope
Form 2848 (Power of Attorney and Declaration of Representative) authorizes the preparer to represent the taxpayer before the IRS in audits, collections, and appeals. State whether Form 2848 is part of the base engagement or a separate paid scope. Three common patterns: no Form 2848 (preparation only, audit triggers separate engagement), limited Form 2848 (notice response only, capped fee), full Form 2848 (representation through audit, hourly billing). Form 2848 must specifically identify the years and tax forms covered. AFSP-only preparers have limited representation rights (returns they prepared); credentialed preparers (CPA, EA, attorney) have unlimited representation rights. State the preparer credential and the consequence for representation scope explicitly.
Step 4: Specify fee and payment terms (per-form vs hourly)
Pick one fee model and document it. Per-form: state the fee for Form 1040 with stated schedules and the addendum fee for additional schedules. Hourly: state the rate, billing increment (typically 0.1 hour), invoicing cadence, and retainer balance trigger. Hybrid: state a base preparation fee plus an hourly rate for out-of-scope work. Reference market benchmarks if relevant: 2020 to 2021 NSA Income and Fees Survey reports the average individual return preparation fee at $323 with state; small-business 1040s with Schedule C typically run $400 to $1,200; complex returns (multi-state, foreign accounts, partnership pass-through) typically run $800 to $2,500. State out-of-pocket pass-throughs (e-file fees, state filing fees, mailing) explicitly. Circular 230 sec 10.27 prohibits contingent fees on most original returns.
Step 5: Include Circular 230 sec 10.32 best practices
Treasury Department Circular No. 230 sec 10.32 (Practice of Law) and sec 10.33 (best practices) are advisory but the IRS Office of Professional Responsibility treats compliance as baseline expectations. Reference Circular 230 best-practices compliance in the engagement letter: communicating clearly with the client, establishing relevant facts, applying the law to the facts, advising the client of the implications of conclusions reached, and acting fairly and with integrity in IRS practice. Sec 10.34 (Standards with respect to tax returns) and sec 10.36 (Procedures to ensure compliance) impose firm-wide compliance procedures. AICPA Statement on Standards for Tax Services Statement No. 1 (Tax Return Positions) imposes parallel obligations. Documenting Circular 230 reference reduces exposure in disciplinary proceedings.
Step 6: Document e-file consent (Form 8879)
IRC 6011(e)(3) requires specified preparers (those who reasonably expect to prepare 11 or more individual returns in a calendar year) to e-file. Form 8879 (IRS e-file Signature Authorization) is the document the taxpayer signs to authorize transmission of the e-filed return. The engagement letter should state the e-file process: preparer prepares the return, taxpayer reviews, taxpayer signs Form 8879 (electronically per IRS Pub 1345 KBA rules or wet-ink), preparer transmits the return after Form 8879 signature, preparer retains Form 8879 for three years per IRC 6107. State the consequence if the client refuses e-file: paper-filing fee or refusal to perform the engagement. Exceptions for taxpayer-requested paper filing must be documented in the file.
Step 7: Privacy disclosure (IRC 7216 consent)
26 U.S.C. 7216 prohibits tax-return preparers from disclosing or using taxpayer information for purposes other than return preparation without written consent under 26 CFR 301.7216-3. The engagement letter should include 7216 consent language for any planned disclosure or use beyond preparation: referrals to lenders or financial advisors, integration with third-party software (bookkeeping, payroll), marketing analytics, peer-to-peer file sharing with another preparer, sharing data with non-preparer family members. Each consent must be specifically identified, separately signed, dated, and identify the recipient and purpose. Penalties for non-compliance are up to $1,000 per disclosure plus possible imprisonment of not more than one year. Use Treasury safe-harbor consent language from the regulations.
Step 8: Termination and amendment process
State that either party can terminate with written notice. Common notice periods: immediate, 10 days, or 30 days. State what happens on termination: pro-rata fees on a fixed-fee engagement, accrued time on an hourly engagement, retainer balance treatment (refund or credit), and file transfer obligations under AICPA ET 1.400.200. For amendments (Form 1040-X), state whether amendments are part of the base engagement (typically only when the amendment is caused by preparer error) or a separate paid scope. Amendment scope should reference the discovery period: most engagements limit free amendments to errors discovered within 30 to 60 days of filing. After that window, amendments are billed at the hourly rate. Silent termination clauses produce fee-collection lawsuits.
Step 9: Document retention (IRS 3 years, IRC 6107)
IRC 6107 requires return preparers to retain a copy of the prepared return (or a list of names and identifying information) for three years after the close of the return period. The IRS extended assessment period under IRC 6501(e) reaches six years for substantial omissions, and many firms adopt seven-year retention. IRC 6695(g) requires Form 8867 due-diligence records for three years from the latest of the return due date, the date the return was electronically filed, or the date the return was given to the taxpayer for signature. State the firm retention policy explicitly. State that the client owns and is responsible for storing their own copies. State what happens to data on termination: the firm transfers a copy of the file to the client, and the firm purges its copy after the retention window closes.
Step 10: Audit support scope
State what happens if the IRS examines the return. Three common scopes appear in engagement letters. First, no audit support: any IRS notice triggers a separate engagement at hourly rates. Second, notice response only: the firm responds to the initial CP-series notice and provides supporting documentation, billed at the hourly rate but with a fee cap (often $500 or $1,000). Third, full representation: the firm represents the taxpayer through the audit, billed at the hourly rate without cap, and requires Form 2848. Most engagement letters default to scope one or two. State the scope explicitly. Note that AFSP-only preparers have limited representation rights (returns they prepared); credentialed preparers (CPA, EA, attorney) have unlimited representation rights.
Step 11: Sign and e-sign workflow
Use an e-signature workflow that produces a tamper-evident audit trail with timestamp, IP address, and consent to electronic records. The federal ESIGN Act and UETA (adopted in 49 states) make e-signed engagement letters legally equivalent to wet-ink for nearly all professional services contracts. Note that Form 8879 (the IRS e-file authorization, separate from the engagement letter) follows IRS-specific rules under Pub 1345 for KBA and signature methods. Store the signed engagement letter in a system that lets you retrieve it on 24-hour notice if a malpractice carrier or examiner asks. Formfy, DocuSign, Adobe Acrobat Sign, and Dropbox Sign all meet the ESIGN evidentiary bar. Avoid emailing a Word doc and asking for a typed name in the signature line; that produces a weaker evidentiary record.
Free template and downloadable PDF
Formfy ships a Form 1040 engagement letter template that maps one-to-one to the eleven steps in this guide. The template is editable in the AI form builder: describe the engagement in plain English and the builder returns a delivery-ready letter with the e-signature block, IRC 7216 consent text, Form 8867 due-diligence acknowledgment, and an optional retainer payment field. The PDF version is generated automatically when the client signs and stored alongside the audit trail.
See also: /faq/tax-preparers-1040-engagement-letter for the FAQ companion hub covering 17 of the most common 1040 preparer engagement-letter questions.
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Start your free trialLast verified: 2026-04-25. This page is informational; it is not legal advice. Tax preparers should review state-specific clauses and high-fee engagement caps with counsel.