How do I classify the retainer?

Decide whether the retainer is 'earned on receipt', 'earned as billed', or 'trust security'. The classification affects trust accounting and the client’s refundability rights; be explicit to avoid later disputes.

Can the addendum be signed electronically?

Yes. Electronic signatures satisfy ESIGN and state UETA rules for most transactions, provided intent, consent, attribution, and retention are documented. Exceptions exist for matters requiring wet-ink signatures by statute.

Is notarization required?

Not generally for fee agreements, but some states or specific instruments require notarization or witnesses. Check local rules before omitting notarization when state law or the practice area demands it.

What if the client requests a refund?

Follow the refund procedure specified in the addendum: reconcile invoices, apply outstanding fees, and return unearned funds. Maintain written accounting to support refunds and defend against disputes.

How long must I retain signed addenda?

Retain signed addenda for at least the active engagement plus three years; state or industry rules may require longer retention, particularly for tax, real estate, or HIPAA-related matters.

Who should sign on behalf of an entity?

Ensure the signer has corporate authority; for companies, use an officer or authorized representative with documentation of signing authority to avoid enforceability challenges.

Electronic Signature
Templates
Legal
Legal Retainer Fee Addendum

Legal Retainer Fee Addendum

This template is fully customizable. Edit the text, fill out the fields, and send it for signature. Give it a try!

Legal Retainer Fee Addendum

This Legal Retainer Fee Addendum (the "Addendum") is made effective as of , by and between Attorney Name: (the "Attorney") and Client Name: (the "Client").

Attorney Address: Client Address:

RECITALS

WHEREAS, the Attorney and the Client are parties to an existing engagement agreement dated , (the "Agreement");

WHEREAS, the parties desire to amend the Agreement solely with respect to the retainer amount, the manner in which funds shall be held and applied, and billing procedures as set forth below; and

WHEREAS, the parties intend this Addendum to be incorporated into and form part of the Agreement and to govern the fee arrangements described herein.

NOW, THEREFORE, in consideration of the mutual covenants contained herein, the parties agree as follows:

1. FEE STRUCTURE

1.1 Retainer Amount. The Client shall pay a retainer in the amount of $ (the "Retainer"). The Retainer shall be paid as follows: .

1.2 Basis of Fees. Fees shall be charged as set forth below (select and complete applicable entries):

Hourly rates: $ per hour for attorneys; $ per hour for paralegals.

Flat fee: $ for the scope described in Section 6. If flat fee selected, specify the deliverables:

Contingency: of recovery. If contingency applies, unrecovered costs remain the Client's obligation.

2. RETAINER, APPLICATION AND REFUNDS

2.1 Deposit and Application. The Retainer shall be deposited into the Attorney's designated trust account and shall be applied to invoices for fees and costs in the order incurred. Trust deposits shall be identified on each invoice and credited against the Client's outstanding balance.

2.2 Earned vs. Unearned. The Retainer shall be considered earned only to the extent actually applied to billed fees and expenses. Any portion of the Retainer that remains unearned upon final billing or termination of representation shall be refunded to the Client within a commercially reasonable time, subject to deduction for outstanding invoices and statutory or ethical obligations.

3. BILLING, INVOICING, AND PAYMENT

3.1 Billing Cycle. The Attorney will render invoices on a basis showing hours, professionals, tasks performed, and advances for costs.

3.2 Payment Terms. Client shall pay invoiced amounts within days of invoice receipt. Late payments may accrue interest at a rate of or the maximum permitted by law, whichever is lower.

4. TRUST FUNDS AND DISBURSEMENT

4.1 Deposit Location. Retainer and other client funds will be held in the Attorney's client trust account: .

4.2 Interim Disbursements. The Attorney may withdraw from the trust account to pay billed fees and authorized expenses as set forth on invoices. Withdrawals will be accompanied by an accounting in accordance with applicable professional rules.

5. COSTS AND EXPENSES

5.1 Client Responsibility. The Client shall reimburse the Attorney for costs and expenses advanced on the Client's behalf, including but not limited to filing fees, expert fees, travel, courier and deposition costs.

5.2 Expense Advance. The Client will provide an advance to cover estimated third‑party costs in the amount of $ , to be replenished upon request.

5.3 Authorization. By signing this Addendum the Client authorizes the Attorney to incur reasonable costs and disbursements in connection with the representation as set forth in the Agreement and this Addendum.

6. TERM; SCOPE; TERMINATION

6.1 Scope of Representation. The Attorney's scope of representation is limited to: . Services beyond this scope require separate written agreement.

6.2 Termination. Either party may terminate the representation upon written notice. Upon termination, the Attorney shall render a final invoice and return any unearned portion of the Retainer in accordance with Section 2, subject to liens or statutory notice requirements.

7. CONFLICTS; CLIENT COOPERATION

7.1 Conflicts. The Attorney represents that, to the best of its knowledge, no current conflict of interest prevents performance under this Addendum. The Client agrees to promptly disclose any facts that might give rise to a conflict.

7.2 Cooperation. The Client agrees to cooperate fully, provide accurate information, execute documents and attend meetings as reasonably requested by the Attorney. Failure to do so may justify suspension or termination of services.

8. NOTICES

Attorney Notice Address

Attorney Notice Email

Client Notice Address

Client Notice Email

9. GOVERNING LAW; VENUE

This Addendum shall be governed by and construed in accordance with the laws of the State of without regard to conflict of law principles. Venue for any dispute arising under this Addendum shall lie in the state or federal courts located in the same state.

10. ENTIRE AGREEMENT

This Addendum, together with the Agreement, constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes any prior oral or written agreements or understandings relating to fees and retainers.

11. SEVERABILITY

If any provision of this Addendum is held to be invalid or unenforceable, such provision shall be struck and the remaining provisions shall remain in full force and effect.

12. AMENDMENTS; WAIVER

This Addendum may be amended only by a written instrument signed by both parties. No waiver of any provision will be effective unless in writing and signed by the party granting the waiver.

13. COUNTERPARTS; EXECUTION

This Addendum may be executed in counterparts, each of which shall be an original and all of which together shall constitute one and the same instrument. Electronic or facsimile signatures shall be deemed originals for all purposes.

Additional terms and clarifications (if any):

Attorney:

Party Label:

By:

Date:

Client:

Party Label:

By:

Date:

What the Legal Retainer Fee Addendum Is and when it’s used

A Legal Retainer Fee Addendum is a supplemental agreement attached to an engagement letter or representation agreement that documents the amount, application, and handling of a legal retainer. It clarifies whether the retainer is earned, refundable, or a trust deposit, establishes billing and replenishment procedures, and specifies how unused funds will be returned or applied at the end of representation. The addendum often includes dispute resolution language and references to the main engagement terms so that fee handling is clear to the client and counsel and reduces billing disputes later.

Why including a Retainer Fee Addendum matters

A clear addendum reduces confusion about billing, documents the parties’ expectations, and supports trust accounting compliance. It protects both client and attorney by defining ownership of funds, replenishment triggers, and end-of-engagement procedures.

Who typically completes a Legal Retainer Fee Addendum

Law firms and individual attorneys prepare this addendum when taking new matters or changing fee arrangements.

Solo and small-firm attorneys who require a clear trust accounting approach for client funds and limited administrative staff.
Corporate legal departments establishing standardized retainer handling across panels and outside counsel.
Clients or corporate procurement teams reviewing fee and refund mechanics before signing an engagement agreement.

The document helps accounting, compliance, and client service teams enforce consistent handling of retainer funds across matters.

Stepwise completion: fill and execute the addendum

Follow these sequential steps to prepare, approve, sign, and store the addendum so it is enforceable and integrated with billing systems.

01

Prepare Draft: Insert case matter, retainer amount, and type; align with engagement letter.
02

Review Internal: Have finance and supervising counsel review trust handling language.
03

Client Review: Provide the addendum to the client for questions and signature.
04

Execute and Store: Obtain signatures and save in matter file and accounting system.

Configuring a digital workflow for execution

Map the addendum into an eSignature workflow to ensure signer order, authentication, and automatic retention of the signed copy.

Field	Configuration
Signer Order	Client first, then attorney or firm approver
Authentication	Email link or SMS code for client verification
Required Fields	Retainer amount, date, signature, printed name
Storage	Save signed PDF to matter folder and accounting system

Digital signing flow for a Retainer Fee Addendum

A typical online signing flow reduces back-and-forth and records a complete audit trail for trust accounting and compliance.

Upload Document: Sender uploads the addendum PDF to the eSignature platform
Place Fields: Add signature, date, and required client data fields
Send to Client: Generate secure signing link and deliver via email or SMS
Capture Audit Trail: System records timestamps, IP, and actions for the signed file

Key components every professional addendum should include

A robust addendum combines practical billing rules with trust protections and clear notice mechanics so both parties understand fund treatment.

Retainer Classification

Label funds as earned, unearned, or security deposit. This determines whether funds are immediately revenue or must be held in trust until earned.

Billing Application

Define when the retainer is applied to fees and expenses and whether hourly or blended rates are used for application.

Replenishment Terms

Specify trigger amounts and notice for replenishment (for example, maintain minimum balance of $X or replenish after invoice application).

Refund Procedures

Describe timing and method for refunds of unearned amounts at matter close, and any deductions for outstanding fees or costs.

Recordkeeping Rights

State that the firm will provide accounting of retainer use upon request and frequency of account statements.

Dispute Resolution

Include governing law, whether arbitration applies, and how billing disputes are elevated to avoid uncertainty.

Essential data elements for compliance and recordkeeping

Client ID: Client number or matter code

Trust Account: Account name and bank details

Retainer Amount: Precise dollar value

Effective Date: MM/DD/YYYY format

Signature: Typed or eSigned name with date

Billing Rules: Written application and replenishment terms

Common legal and financial risks from an incorrect addendum

Trust Violations: Misclassifying funds risks bar discipline

Refund Disputes: Ambiguous refund terms create client litigation risk

Accounting Errors: Poor documentation leads to reconciliation failures

Regulatory Audit: Inadequate records trigger audits by state bar or regulators

Breach of Fiduciary Duty: Improper use of client funds can lead to malpractice claims

Tax Reporting: Incorrect revenue recognition affects tax filings

Frequent preparation errors to avoid

Failing to state whether the retainer is earned on receipt versus applied as billed, which changes trust accounting and client refund rights.
Using vague replenishment language such as 'reasonable' threshold without numeric triggers, producing administrative disputes when the balance falls.
Omitting a clear effective date or using inconsistent names for the client or firm, leading to banking and reconciliation delays.
Not aligning the addendum to the primary engagement letter so the two documents contain conflicting billing or termination terms.

Comparing eSignature vendor pricing and capabilities for this workflow

Basic pricing and feature availability for common eSignature options; signNow appears first for comparison. Review enterprise terms for advanced compliance features.

	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 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

Frequently asked questions and troubleshooting

Answers to common questions about preparing, signing, and storing a Legal Retainer Fee Addendum, with practical fixes for typical issues.

Need help? Contact support

How do I classify the retainer?
Decide whether the retainer is 'earned on receipt', 'earned as billed', or 'trust security'. The classification affects trust accounting and the client’s refundability rights; be explicit to avoid later disputes.
Can the addendum be signed electronically?
Yes. Electronic signatures satisfy ESIGN and state UETA rules for most transactions, provided intent, consent, attribution, and retention are documented. Exceptions exist for matters requiring wet-ink signatures by statute.
Is notarization required?
Not generally for fee agreements, but some states or specific instruments require notarization or witnesses. Check local rules before omitting notarization when state law or the practice area demands it.
What if the client requests a refund?
Follow the refund procedure specified in the addendum: reconcile invoices, apply outstanding fees, and return unearned funds. Maintain written accounting to support refunds and defend against disputes.
How long must I retain signed addenda?
Retain signed addenda for at least the active engagement plus three years; state or industry rules may require longer retention, particularly for tax, real estate, or HIPAA-related matters.
Who should sign on behalf of an entity?
Ensure the signer has corporate authority; for companies, use an officer or authorized representative with documentation of signing authority to avoid enforceability challenges.

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