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Engagement Letter

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Engagement Letter Between Accounting Firm and Client For Tax Return Preparation

(Date of letter)

Dear :

This letter is to confirm and specify the terms of our engagement with you and to clarify the nature and extent of the services we will provide. In order to ensure an understanding of our mutual responsibilities, we ask all clients for whom returns are prepared to confirm the following arrangements.

We will prepare your federal and requested state income tax returns from information that you will furnish us. We will not audit or otherwise verify the data you submit, although it may be necessary to ask you for clarification of some of the information.

We will furnish you with questionnaires or worksheets to guide you in gathering the necessary information. Your use of such forms will assist in keeping pertinent information from being overlooked.

It is your responsibility to provide all the information required for the preparation of complete and accurate returns. You should retain all the documents, canceled checks and other data that form the basis of income and deductions. These may be necessary to prove the accuracy and completeness of the returns to a taxing authority. You have the final responsibility for the income tax returns, and, therefore, you should review them carefully before you sign them.

Our work in connection with the preparation of your income tax returns does not include any procedures designed to discover defalcations or other irregularities, should any exist. We will render such accounting and bookkeeping assistance as determined to be necessary for preparation of the income tax returns.

We will use professional judgment in resolving questions where the tax law is unclear, or where there may be conflicts between the taxing authorities' interpretations of the law and other supportable positions. Unless otherwise instructed by you, we will resolve such questions in your favor whenever possible.

The law provides various penalties that may be imposed when taxpayers understate their tax liability. If you would like information on the amount or the circumstances of these penalties, please contact us. Your returns may be selected for review by the taxing authorities. Any proposed adjustments by the examining agent are subject to certain rights of appeal. In the event of such government tax examination, we will be available upon request to represent you and will render additional invoices for the time and expenses incurred.

Our fee for these services will be based upon the amount of time required at standard billing rates plus out-of-pocket expenses. All invoices are due and payable upon presentation.

If the foregoing fairly sets forth your understanding, please sign the enclosed copy of this letter in the space indicated and return it to our office. However, if there are other tax returns you expect us to prepare, such as gift or property tax returns, please inform us by noting so just below your signature at the end of the returned copy of this letter.

We want to express our appreciation for this opportunity to work with you.

Sincerely yours,

By:

Understood and Agreed:

By:

Signature:

Enter text✕

What an Engagement Letter Is and What It Covers

An Engagement Letter is a written agreement that defines the relationship between a professional service provider and a client, describing the scope of work, responsibilities, deliverables, timing, fees, and other key terms. It serves to set expectations, limit misunderstandings, and document mutual consent before work begins. For many firms, the Engagement Letter is a contract that can be enforced under contract law; its formality and level of detail should reflect the complexity and risk of the engagement.

Why an Engagement Letter Matters for Legal Certainty

An Engagement Letter clarifies duties, limits liability, and documents consent, which reduces disputes and creates an evidentiary record. Under U.S. law an executed Engagement Letter functions as a contract when it shows mutual assent, consideration, and defined obligations.

Why an Engagement Letter Matters for Legal Certainty

Who Typically Prepares and Signs an Engagement Letter

Engagement Letters are used across professions to formalize client relationships and preserve a written record of terms.

  • Professional firms (law, accounting, consulting) use standard templates adapted per matter and client.
  • Small businesses and independent consultants use Engagement Letters to document one-off or recurring services.
  • In-house legal or procurement teams negotiate engagement terms for external vendors and retained advisors.

A clear Engagement Letter protects both parties by documenting scope, fees, timelines, termination rights, and dispute resolution mechanics.

Core Elements to Include in Every Engagement Letter

A well-drafted Engagement Letter sets expectations and allocates risk. The following components form the typical structure and should be present or intentionally omitted with client acknowledgment.

Parties

Identify the exact legal names and contact details of the client and the service provider, including legal entity type.

Scope of Work

Describe services in clear, measurable terms and list deliverables, excluded tasks, and any assumptions that limit ambiguity.

Fees and Payment

State fee basis (hourly, fixed, retainer), billing schedule, expenses, and late-payment remedies, including tax treatment if applicable.

Timeline

Specify effective date, milestone dates, estimated completion, and procedures for schedule changes or delays.

Termination

Define termination rights, notice requirements, fees on termination, and transition assistance obligations if needed.

Confidentiality & IP

Allocate ownership or license rights to deliverables and set confidentiality obligations, exceptions, and permitted disclosures.

Required Administrative and Compliance Details

Client Legal Name: Full legal entity name exactly as on registration documents.
Provider Legal Name: Company or individual name, including DBA if used.
Scope Identifier: Project code or brief scope title to match invoices and SOWs.
Effective Date: MM/DD/YYYY format for contract start.
Billing Terms: Net terms, currency, and billing contact details.
Governing Law: State selected to interpret the agreement.

Step-by-Step: Preparing and Signing an Engagement Letter

Follow this sequence to create, review, and finalize an enforceable Engagement Letter with minimal rework.

  • 01
    Draft the scope: Write a precise statement of work and attach exhibits.
  • 02
    Set fees: Define billing rates, expenses, and payment terms clearly.
  • 03
    Review legal terms: Confirm confidentiality, IP, limitation of liability, and governing law.
  • 04
    Execute and retain: Obtain signatures from authorized signers and store copies per retention rules.

How to Configure the Online Engagement Letter Workflow

When digitizing Engagement Letters, configure workflow fields and authentication to align with legal and operational needs.

Field Configuration
Signature Field Require full signature and date; enforce required status.
Initial Fields Place initials on each page where interim acknowledgment is needed.
Routing Order Set sequential signing when approvals must proceed in order.
Authentication Choose email, SMS code, or stronger ID verification per risk level.

Where to Send or File the Executed Engagement Letter

Decide in advance where executed copies will be stored and which recipients must receive final copies to preserve evidence and operational continuity.

  • Client Records: Send a fully executed copy to the client's designated contract or procurement inbox.
  • Provider Records: Store a signed master in the provider's contract repository for billing and audit.
  • Project Team: Distribute redacted key terms to the delivery team for scope alignment.
  • Legal/Compliance: Retain a copy with legal counsel when liability or confidentiality issues exist.

Choosing Digital Tools and Authentication for Signing

Use a platform that supports secure signatures, audit trails, and the authentication level suited to the engagement's risk.

  • Integrations: Connect with CRM or document repositories such as Salesforce or Google Workspace for automated filing.
  • Authentication: Use email, SMS code, or KBA depending on required signer verification strength.
  • Audit Trail: Ensure the platform captures IP, timestamp, and action logs for evidentiary support.

Balance signer convenience and authentication rigor: higher-risk matters may require stronger ID verification or notarization where appropriate.

Timing Considerations Commonly Included in Engagement Letters

Specify dates and deadlines clearly to avoid disputes about performance windows, billing cycles, and termination notice periods.

Effective Date:

MM/DD/YYYY format for when obligations commence.

Deliverable Dates:

Target dates or windows for each milestone or deliverable.

Billing Cycle:

Invoice issuance frequency and payment due dates.

Notice Period:

Time required for termination or contract modification notices.

Response SLA:

Expected turnaround times for client approvals or comments.

Common Mistakes When Preparing an Engagement Letter

  • Vague scope language that leads to scope creep and billing disputes.
  • Omitting termination fees or transition obligations for partially completed work.
  • Failing to identify authorized signatories, causing invalid signatures.
  • Neglecting to attach exhibits (SOW, pricing) referenced in the letter.

Risks and Consequences of an Incorrect or Incomplete Engagement Letter

Contract Disputes: Ambiguous terms increase litigation risk and defense costs.
Billing Disputes: Unclear fee terms may delay payments or trigger withholding.
Regulatory Exposure: Missing confidentiality or data protections can violate HIPAA or other rules.
Invalid Signatures: Unsigned or improperly executed letters may not bind parties.
I-9/Payroll Impact: Incorrect engagement classification may create employment liabilities.
Reputational Harm: Client misunderstandings can damage ongoing business relationships.

Examples: How Engagement Letters Work in Practice

Real-world examples show how standard clauses are applied across common scenarios.

Small Consulting Engagement

A consultant attaches a one-page SOW and a fixed-fee schedule

  • Client prepays a 25% retainer
  • The retainer and milestone billing terms avoided later invoice disputes and clarified deliverables for a three-month project.

Law Firm Retainer

A law firm defines hourly rates, billing increments, and an advance retainer

  • Client receives monthly detail statements
  • Clear billing cycles and scope definitions reduced invoice challenges and preserved attorney-client expectations.

Pricing and Feature Comparison: eSignature Options

Compare typical starting prices, free trial availability, bulk-send support, audit trail presence, and HIPAA compliance across common e-signature vendors.

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 Yes, 7-day free trial No No Yes, limited Yes, limited
Bulk Send Yes Yes Yes Yes No
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes No No

Who Can Sign an Engagement Letter

Authorized Officer

A company officer with delegated signing authority must sign for a corporate client. Verify authority by corporate resolution or signature policy to ensure enforceability, particularly for contracts committing significant fees or liabilities.

Individual Client

An individual client signs using their full legal name and title (when acting in a representative capacity). Ensure identity is verifiable and consistent with billing and payment records to avoid attribution disputes.

Security, Compliance, and Technical Protections for Signed Documents

Encryption In Transit: TLS 1.2/1.3
Encryption At Rest: AES-256
Regulatory Certifications: SOC 2 Type II | ISO 27001 | PCI DSS
Healthcare & FDA: HIPAA (BAA required) | 21 CFR Part 11 support
Privacy & Accessibility: GDPR | CCPA | WCAG 2.0 Level AA
Legal Frameworks: ESIGN | UETA | eIDAS compatibility

Frequently Asked Questions About Engagement Letters

Answers to common questions about drafting, execution, and electronic signing of Engagement Letters in the United States.


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