Scope
Define services provided (return types, representation, advisory work), exclusions, and assumptions about client-supplied information. Specify whether tax planning or audit defense is included. Include estimated hours and deliverable formats.
A clear engagement letter reduces misunderstandings by documenting services, fees, responsibilities, and timelines. It protects both client and preparer by setting expectations, limiting liability where permissible, and creating an evidentiary record for disputes, audits, or regulatory reviews.
Typical users include tax preparers, accounting firms, individual and business clients, and financial advisors who need documented tax service terms.
Use the letter whenever responsibilities, deadlines, or fees require written confirmation to reduce later disputes or surprises.
As engagement lead, the principal approves scope, negotiates fees, and signs the letter on the firm's behalf. They ensure conflict checks, oversee deliverable accuracy, and coordinate client communication to meet filing deadlines and documentation requirements.
The tax manager prepares the engagement details, collects client records, identifies additional compliance needs, and confirms preparer responsibilities. They track timelines for extensions, payment schedules, and delivery of copies required for audit or client retention.
Define services provided (return types, representation, advisory work), exclusions, and assumptions about client-supplied information. Specify whether tax planning or audit defense is included. Include estimated hours and deliverable formats.
Describe fee basis (hourly, fixed, or hybrid), retainer requirements, billing intervals, reimbursement of out-of-pocket expenses, and procedures for fee increases or additional services beyond the original scope.
List documents to be delivered (drafts, final returns, engagement summary), delivery method (email, secure portal), expected timing, and whether paper or electronic copies will be retained by the preparer.
State the client's obligations to provide complete, accurate records, sign returns, timely respond to requests, and disclose audit or prior-year issues. Note consequences of missing information.
Include any limitation of liability or indemnity consistent with professional standards and state law; specify insurance coverage and caps where permitted and reasonable and conflict resolution process.
Identify authorized signers, signature blocks for each party, signature dates, and whether electronic signatures are accepted under ESIGN or state law as equivalent to handwritten signatures.
Attach IRS Form 2848 or other power of attorney documents when the preparer will represent the client before tax authorities; include expiration and scope limitations to avoid unauthorized actions.
Provide a checklist of required records—W-2s, 1099s, bank statements, expense receipts—to reduce back-and-forth and speed completion of returns and clarify which year items apply to.
Include client authorization language for e-file, third-party disclosures, and consent to electronic delivery of documents where applicable and specify methods for revoking consent in writing.
Attach final signed return copy and representation letter if preparer will represent client; note any subsequent amendment procedures and fees, including timelines and additional charges.
| Field | Configuration |
|---|---|
| Template Name | Use firm-specific engagement template for tax clients |
| Conditional Fields | Show fee clauses when hourly selected |
| Signer Roles | Assign primary and secondary signers |
| Authentication | Use email or SMS code verification |
Choose eSignature settings that meet ESIGN/UETA and, where applicable, HIPAA or 21 CFR Part 11 requirements for tax client data.
Typical date or timing expectations
Provide signed copy at engagement start
Two weeks before filing to allow review
Individual returns due April 15; extensions to Oct 15
File Form 4868 for individual extension; note fees
A mid-size CPA firm standardized their engagement letters to include e-signature acceptance and clear fee schedules to reduce billing disputes.
A small business clarified multistate payroll handling and 1099 issuance obligations in its engagement letter to avoid missed filings and penalties.
| Comparison Criteria and Document Types | Tax Engagement Letter | Service Contract |
|---|---|---|
| Formality and Usual Document Tone | less formal | more formal |
| Signature Requirements and Acceptance Methods | yes, e-sign ok | yes, signed contract |
| Scope, Deliverables, and Limitation Details | focused on tax tasks | broader obligations |
| Enforceability and Dispute Resolution Provisions | generally enforceable | enforceable, often with remedies |
| signNow | DocuSign | Adobe Sign | PandaDoc | HelloSign | |
|---|---|---|---|---|---|
| Starting Price | $8/user/mo | $15/user/mo | $14/user/mo | $19/user/mo | $15/user/mo |
| Free Trial | 7-day trial | Varies | Varies | Varies | Varies |
| Bulk Send | Yes | Yes | Yes | Yes | No |
| Audit Trail | Yes | Yes | Yes | Yes | Yes |
| HIPAA Compliant | Yes | Yes | Yes | No | No |