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Engagement Letter for Accounting and Tax Preparation Services

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Engagement Letter Between Accounting Firm and Client For Tax Return Preparation

(Date of letter)

(Name of Client)

(Address of Client)

Dear (Name of Client):

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 (Year) 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,

(Name of Accounting Firm)

By:

(Printed name & Office in PLLC)

Signature:

(Signature of Officer)

Understood and Agreed:

(Name of Client)

By:

(Printed name & Office in Corporation)

Signature:

(Signature of Officer)

Enter text✕

What this engagement letter does

An Engagement Letter for Accounting and Tax Preparation Services is a written agreement that defines the scope, responsibilities, fees, timing, and deliverables between an accounting firm and its client. It sets expectations for bookkeeping, tax return preparation, representation before tax authorities, and any advisory services. The letter typically covers who will perform the work, required client documents, deadlines, billing terms, confidentiality, limitations of liability, and termination rights, providing a clear record that reduces misunderstandings and supports professional standards and recordkeeping.

Why a clear engagement letter matters

A well-drafted engagement letter reduces disputes, clarifies responsibilities, and documents consent to fees and delivery timing. It strengthens professional compliance, supports audit trails, and helps both parties meet regulatory and tax recordkeeping requirements while limiting liability exposure.

Why a clear engagement letter matters

Who typically signs an accounting engagement letter

Use an engagement letter whenever services have material scope, estimated fees, or when regulatory recordkeeping and consent requirements apply.

  • Small business owners and sole proprietors who need bookkeeping and tax return preparation services and want a written scope and fee schedule.
  • Mid-size companies that require periodic financial reporting, tax planning, and representation for audits or notices from tax authorities.
  • Individuals with complex tax situations (investments, rental properties, estates) who require defined responsibilities and privacy protections.

Step-by-step: completing the engagement letter

Follow these core steps to prepare and finalize the engagement letter efficiently and correctly.

  • 01
    Gather information: Collect legal names, tax IDs, prior-year returns, and authorization forms.
  • 02
    Define scope: List specific services, exclusions, and the expected timeline.
  • 03
    Set fees: Detail billing model, estimates, and payment terms.
  • 04
    Obtain signatures: Have authorized representatives sign and date the letter.

How an engagement letter flows through your workflow

Use this sequence to integrate the letter into onboarding and ongoing service delivery.

  • Prepare draft: Firm drafts letter using client data and standard clauses.
  • Review with client: Client reviews scope, fees, and deadlines and requests edits.
  • Finalize terms: Both parties accept final language and confirm responsibilities.
  • Sign and archive: Execute signatures and save the signed copy in the client record.

Core elements to include in the letter

A comprehensive engagement letter covers operational, financial, and legal points so both parties understand expectations and limits.

Scope

Explicit description of services provided and any services excluded to prevent scope creep and clarify deliverables and responsibilities.

Fees

Clear fee schedule, billing frequency, payment methods, and terms for additional work or out-of-scope tasks to avoid disputes.

Client obligations

List documents the client must provide, timing requirements, and accuracy warranties necessary for the firm to perform services.

Confidentiality

State confidentiality obligations, permitted disclosures, and any data protection measures consistent with applicable privacy laws.

Limitation of liability

Reasonable limits on damages, indemnity clauses, and disclaimers for matters outside the firm’s control where permitted by law.

Termination

Procedures and notice periods for ending the engagement and responsibilities for final deliverables and outstanding fees.

Recommended security and compliance items

Encryption in transit: TLS 1.2/1.3
Encryption at rest: AES-256
Audit trail: Timestamped signing history
HIPAA readiness: BAA available
Authentication: Multi-factor options
Certifications: SOC 2 Type II

Penalties and risks of errors

Incorrect TIN: Backup withholding may apply
Late filing: Penalties per information return
Incomplete scope: Missed deadlines and liability
Unaudited reliance: Financial misstatements risk
HIPAA violations: Civil monetary penalties possible
Unauthorized signatures: Contracts may be voided

Common preparation mistakes to avoid

  • Using vague language for services and deliverables that allows differing interpretations and later disputes.
  • Failing to specify deadlines or document dependencies that lead to missed filings or rushed work.
  • Omitting client obligations (records, authorizations), which delays completion and increases cost.
  • Not documenting fee adjustments or extra services, creating billing disagreements and collection issues.

Configuring an online engagement workflow

Set these fields and automation steps when preparing the engagement letter in an e-signature platform.

Field Configuration
Effective Date Auto-fill MM/DD/YYYY from start trigger
Signer roles Assign client and firm signer with order
Reminders Schedule automatic reminders at 3 and 7 days
Document retention Set archive location and retention tag

Digital signing and platform considerations

Choose a platform that supports secure e-signing, audit trails, and required compliance features for your industry.

  • File formats: PDF, DOCX supported
  • Integrations: Connects to CRM and storage
  • Authentication: Email, SMS, or KBA

Key timing and filing deadlines to keep in mind

Track these common tax-related dates and timing expectations when the engagement involves tax filings or information returns.

W-9 delivery:

Provide upon request from payer

W-2 to employee:

Issue by January 31

1099-NEC deadline:

Send to recipients and IRS by January 31

Individual return:

Form 1040 due April 15 (extension to Oct 15)

FBAR filing:

Due April 15 with automatic extension to Oct 15

Vendor pricing and capability snapshot for e-signing engagement letters

Compare basic pricing and common capabilities across providers. signNow is listed first per comparative convention; vendor plans and features vary by tier.

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 free trial Varies Varies Varies Varies
Bulk Send Yes (premium tier) Yes Yes Yes No
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes No No
Envelope Cap No envelope cap 100 envelopes/user/year Varies by plan Varies by plan Varies by plan

Frequently asked questions about engagement letters and e-signing

Answers to common questions about validity, signatures, notarization, updates, and storage when using engagement letters for accounting and tax services.


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