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Engagement Letter Between Accounting Firm and Client for Audit and Tax Return Preparation

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Engagement Letter between Accounting Firm and Client for Audit Services

Dear

This Agreement is intended to describe the nature and scope of our services. As agreed, we will audit the statement of financial position of as of , and the related statements of activities and cash flows for the year then ending in accordance with generally accepted auditing standards. The financial records and financial statements are the responsibility of the management of .

Our responsibility is to express an opinion on the financial statements based on our audit. At the conclusion of our audit, we will submit to you a report containing our opinion as to whether the financial statements, taken as a whole, are fairly presented based on generally accepted accounting principles. If during the course of our work it appears for any reason that we will not be in a position to render an unqualified opinion on the financial statements, or that our report will require an explanatory paragraph, we will discuss this with you.

We will design our audit to provide reasonable assurance of detecting errors or irregularities that would have a material effect on the financial statements. Should any such errors or irregularities come to our attention, we will report them to you. Our work will be based primarily upon selected tests of evidence supporting the amounts and disclosures in the financial statements and, therefore, will not include a detailed check of your transactions for the period. Accordingly, an audit performed in accordance with generally accepted auditing standards is not a guarantee of the accuracy of the financial statements, and there is a risk that material errors or fraud may exist and not be detected by us. However, we will inform you of any material errors or fraud that come to our attention.

If you plan any reproduction or publication of our report, or any portion of it, copies of masters' or printers' proofs of the entire document should be submitted to us in sufficient time for our review.

As required by generally accepted auditing standards, we will request certain written representations from management at the close of our audit to confirm oral representations given to us and to indicate and document the continuing appropriateness of such representations and reduce the possibility of misunderstanding concerning matters that are the subject of the representations.

Generally accepted auditing standards require that we contact to review their working papers and discuss their audit of prior years' financial statements. For this purpose it will be necessary that you authorize in writing to communicate with us for that purpose (if necessary).

We plan to perform as many phases of our audit work as is practicable, prior to the close of your fiscal year. This is done to keep the work after year-end at a minimum and to ensure that our reports are submitted to you as soon as possible after the close of the fiscal year.

Our objective will be the issuance of our report to you no later than . As a result, you agree that all records, documentation, and information we request in connection with our audit will be made available to us, that all material information will be disclosed to us, and that we will have full cooperation of your personnel.

We also ask that your personnel, to the extent possible, prepare various schedules and analyses for our staff. This assistance by your personnel will serve to facilitate the progress of our work and minimize costs to you.

Our charges to you for the audit described above are not expected to exceed $ , plus out-of-pocket expenses. Should we encounter any unforeseen problems which will warrant additional time or expense, you will be notified of the situation and, if possible, the added cost. Our charges for other services will be agreed to separately. Bills will be rendered on a monthly basis with payment due upon presentation.

Any dispute pursuant this Agreement shall be required to be resolved by binding arbitration of the parties hereto. If the parties cannot agree on an arbitrator, each party shall select one arbitrator and both arbitrators shall then select a third. The third arbitrator so selected shall arbitrate said dispute. The arbitration shall be governed by the rules of the American Arbitration Association then in force and effect.

We believe the foregoing correctly sets forth our understanding, but if you have any questions, please let us know. If you find the arrangements acceptable, please acknowledge your agreement to the understanding by signing and returning to us the copy enclosed.

Sincerely yours,

By:

Understood and Agreed:

By:

Enter text✕

What this engagement letter is and why it matters

An engagement letter between an accounting firm and a client for audit and tax return preparation is a written agreement that defines the services to be provided, the responsibilities of each party, timing and deliverables, fees, and limitations of the engagement. It creates a clear record of mutual expectations, reduces misunderstandings about scope and billing, and provides documentation useful for professional standards compliance and later dispute resolution.

Why a clear engagement letter protects both parties

A well-drafted engagement letter establishes the scope, timing, fees, and acceptance terms that reduce legal and professional risk, support audit quality standards, and document consent to electronic communications and signatures under ESIGN and state law where applicable.

Why a clear engagement letter protects both parties

Who typically signs and relies on this engagement letter

The document serves as the operational contract that auditors, tax preparers, and client management refer to throughout the engagement.

  • Accounting firms and audit partners seeking documented scope and liability limits for professional standards compliance.
  • Corporate finance officers and small business owners who need clear billing, timelines, and deliverable definitions.
  • Nonprofit CFOs and board treasurers coordinating audit engagements and tax filing obligations.

Core components to include in the engagement letter

A complete engagement letter addresses six core areas so both parties understand commitments, deliverables, communications, fee arrangements, and limits on liability that apply during the audit and tax preparation engagement.

Parties

Identify the accounting firm and client by full legal names, legal entity types, and primary contact persons for the engagement.

Scope of Services

Describe audit objectives, standards used (e.g., GAAS), tax return types to be prepared, and any excluded procedures or services.

Client Responsibilities

List client deliverables such as financial records, supporting schedules, and representations the client must provide to enable timely completion.

Fees and Billing

Specify fee structure, billing rates or fixed fees, retainer terms, out-of-pocket expenses, and timing for invoices and payments.

Deliverables and Timing

State expected milestones such as fieldwork, draft reports, final audit opinion, and tax return filing dates with responsible parties and approximate dates.

Limitations and Liability

Include disclaimers, limitation of liability if applicable, use restrictions on reports, and termination provisions.

Step-by-step: completing and executing the engagement letter

Follow these four practical steps to prepare, approve, sign, and store the engagement letter for an audit and tax services engagement.

  • 01
    Prepare draft: Populate parties, scope, fees, and timelines based on client intake and engagement risk assessment.
  • 02
    Review internally: Have audit partner or tax principal and legal counsel review terms, limits, and any conflict language.
  • 03
    Obtain client approval: Send final draft to authorized client signatory for review and acceptance, record any negotiated changes.
  • 04
    Execute and retain: Have authorized signatories sign, date, and record the executed letter in the client file and document management system.

How to configure the online workflow for the engagement letter

Use named fields, signer roles, and authentication settings to streamline electronic execution and secure storage for the engagement letter.

Field Configuration
Template Name Create a reusable template labeled 'Engagement Letter - Audit & Tax'.
Signer Roles Define roles: Accounting Firm Partner | Client Authorized Signer.
Authentication Use email link plus optional SMS code or ID verification for higher assurance.
Retention Location Automatically save executed copy to the client folder in your document management system.

Technical requirements for secure e-signing and storage

Ensure the chosen platform provides an audit trail, secure storage, and any required compliance features such as HIPAA or 21 CFR support.

  • File formats: PDF, DOCX and read-only signed PDF
  • Integrations: Connectors for Microsoft 365, Google Workspace, NetSuite
  • Authentication: Email, SMS code, ID verification

Typical submission and routing flow for the engagement letter

A standard online routing flow ensures the correct review, signature order, and archival of the engagement letter once executed.

  • Upload document: Upload the finalized engagement letter to the signing platform.
  • Place fields: Add signature, date, initials, and checkbox fields for consent and disclosures.
  • Assign signers: Set the signing order and recipient emails or generate a secure link.
  • Send and archive: Send for signature and save the executed PDF plus audit trail to client records.

Key timelines and filing deadlines to note

Record these time-sensitive milestones to align audit fieldwork, deliverables, and tax filing requirements and to avoid penalties or delays.

Engagement acceptance date:

Date parties sign the engagement letter and work may commence.

Audit fieldwork start:

Schedule approximate start date for interim and final fieldwork.

Draft reporting deadline:

Target date for draft audit report or tax return review by client.

Final report delivery:

Date for issuance of final audit opinion and signed reports.

Tax filing deadline:

Federal individual/business return typically due April 15 (extensions possible).

Common mistakes that delay or weaken the engagement letter

  • Vague scope language that leads to scope creep and disputes about deliverables.
  • Incorrect client or entity name causing mismatches with tax filings and identification records.
  • Missing fee detail or billing method that generates invoice disputes mid-engagement.
  • Failing to capture client consent to electronic delivery and e-signatures as required by ESIGN.

Principal legal and regulatory risks tied to engagement errors

1099 filing penalties: Penalties $60–$330 per form depending on lateness (IRC §6721).
Intentional disregard: Penalty $660+ per form with no maximum for intentional disregard.
I-9 paperwork: Violations $281–$2,789 per error (8 CFR §274a.2).
Professional liability: Claim exposure for missed audit issues or tax filing errors.
Breach of confidentiality: HIPAA exposure for protected health information without a BAA.
Recordkeeping failures: Missing records can hinder defense in tax or regulatory examinations.

Security and compliance facts to document in the file

Encryption: TLS 1.2/1.3 in transit; AES-256 at rest
Audit trail: Detailed timestamp, IP, and signer actions retained
HIPAA readiness: BAA available where protected health information exists
21 CFR Part 11: Support for compliance with FDA regulated records
Certifications: SOC 2 Type II, ISO 27001, PCI DSS
Legal frameworks: Compliant with ESIGN and UETA

Practical tips for accurate and efficient engagement letters

Adopt these practices to reduce rework, accelerate signoff, and strengthen the engagement file for audit and tax preparation work.

Use a standardized template
Maintain a firm-approved template that includes mandatory disclosures, limitation of liability language, and consistent fee schedules to speed drafting and reduce omissions.
Document client acceptance
Record client approval of scope and fees in writing or via an executed electronic signature to avoid later disputes about services performed.
Confirm signer authority
Verify that the person signing for the client has proper authority; document title, corporate resolution, or power of attorney as needed.
Archive executed copies securely
Store the signed engagement letter and associated audit or tax working papers in your secure records system with access controls and version history.

Frequently asked questions about engagement letters and electronic execution

Answers to common questions about scope, signatures, legal effect, and recordkeeping when using an engagement letter for audits and tax services.


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eSignature vendor pricing and feature comparison for executing engagement letters

Comparing common vendor pricing and a few key features can help firms choose a platform that supports secure execution, audit trails, and required compliance frameworks.

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 by plan Varies by plan Varies by plan Varies by plan
Bulk Send Yes Yes Yes Yes No
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes No No
Envelope Cap No cap 100 envelopes/user/year Varies Varies Varies
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