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A client’s trust balance can look healthy at the start of a matter and become thin after one invoice and a week of new work. Retainer replenishment is the process of asking the client to add funds under an agreed evergreen retainer arrangement. Done well, it gives the client a clear request and gives the firm time to plan the next stage of work.
In retainer replenishment, a low balance is only a signal. Before sending a request, the firm should check the agreement, the correct client or matter ledger, recent transactions, work in progress, and any pending dispute. This guide shows how to set a threshold, calculate the request, send a useful notice, record the deposit, and handle exceptions. It addresses advance funds held in trust; the treatment of other fee arrangements varies by jurisdiction and agreement.
What an evergreen retainer does
An evergreen retainer is an advance deposit the client agrees to restore through retainer replenishment when it falls to a defined level. The agreement may set a minimum balance, a target balance, the method for calculating a top-up, and a deadline for payment. “Evergreen” describes the repeated funding arrangement; it does not change who owns money held in trust or when the firm may withdraw it.
An advance fee deposit, a payment of an already issued invoice, and a trust-to-operating transfer are separate events. A retainer replenishment request asks for new funds. The firm must still treat the existing and newly received trust money under its applicable rules. Under ABA Model Rule 1.15(c), advance fees and expenses go into a client trust account and may be withdrawn only as earned or incurred. The ABA rule is a model; states have their own adopted rules. The Law Society of Ontario’s fee guidance says retainer funds may move to a general account after work is completed and the client has been billed for that fee amount. Check the rule governing the specific matter and fee arrangement.
A low balance is not automatically a past-due invoice
Before retainer replenishment, check whether the client has an unpaid bill, a low advance deposit, or both. Label each item accurately. A replenishment request should tell the client what additional amount the agreement calls for and why. It should not suggest that an unearned advance is already an overdue fee.
The retainer replenishment distinction also changes the accounting path. A payment toward a billed fee belongs in the appropriate operating workflow; a new advance deposit is received and recorded as trust money when the governing rules and agreement require that treatment. A single payment page or email can confuse the two. Review the destination account and payment instructions before the message goes out.
Check whether the matter actually needs another deposit
Retainer replenishment makes sense only when the agreement supports it, and the matter still needs funded work. A matter about to close may need a final bill and refund of any remaining client funds, rather than a top-up. A paused matter or a client who disputes a charge needs human review before a routine notice.
Plan retainer replenishment around upcoming work, not just yesterday’s balance. A $1,500 balance might cover a quiet week but be too low before a hearing or a substantial drafting phase. The responsible lawyer should confirm the next tasks, deadlines, and likely costs before the billing team asks the client for money.
Put the replenishment terms in the engagement agreement
A reliable retainer replenishment workflow starts before the first low-balance alert. Write the terms in language the client can use. The Law Society of Ontario’s retainer guidance emphasizes clear written terms and client expectations. The precise terms and enforceability of a funding clause depend on local law and the facts of the representation.
Define the deposit, floor, target, and timing
The retainer replenishment terms should distinguish four concepts:
- Initial deposit: The advance amount the client first pays.
- Minimum balance or trigger: The level at which the firm reviews whether to request a top-up.
- Target balance: The agreed level to which the client is asked to restore the deposit.
- Response window: When the client is asked to pay or discuss a problem with the request.
These need not all be the same number. A $2,000 trigger and $5,000 target, for example, imply a top-up of $3,000 when the verified balance is exactly $2,000. The firm should explain whether it measures the trigger after bills are applied, at set review dates, before a known work phase, or through more than one event.
Do not choose a universal percentage because another firm uses one. Base the floor on typical work between billing cycles, expected near-term tasks, and the time needed for a client to respond and funds to become available. Reassess it if the scope or fee rates change. A larger future phase may call for a separate, agreed deposit rather than quietly changing the target.
Explain how billing and disputes affect the request
State when the firm bills, how a statement shows use of the advance, how the client receives a balance update, and whom to contact about an error. Explain what happens when a bill or trust transfer is disputed. A low-balance notice should not treat contested funds as unquestionably available to the firm.
Avoid language that promises the firm will stop work the instant the balance crosses a line. Representation, court deadlines, reasonable notice, and permission to withdraw can limit the firm’s options. The agreement can explain the process for discussing funding and potential withdrawal, but it cannot override applicable professional or tribunal rules.
Set a threshold that gives the firm time to act
A retainer replenishment trigger is an operational decision point, not permission to withdraw money. A good threshold causes the right person to check the ledger while there is still time for a normal conversation with the client. It should be high enough to account for expected work before the next billing and deposit cycle.
Look beyond the posted trust balance
For retainer replenishment, review three separate figures: the posted client or matter trust balance, work in progress that has not yet been billed or properly transferred, and known upcoming disbursements or tasks. Do not subtract unbilled work from the official trust ledger as though the money has already left the account. Keep a separate planning view that shows projected coverage.
The distinction matters when a $1,600 posted balance appears to be above a $1,500 trigger, but $900 of approved, unbilled work and a planned filing fee are coming. That is a reason for the lawyer to consider an earlier request. It is not authority to change a trust balance before a permitted transaction occurs.
Some firms also review a matter before a new phase, even if the trust balance has not hit the numeric floor. This prevents a threshold designed for ordinary work from becoming inadequate before a large hearing, closing, or expert expense.
Use a clear calculation
For a simple retainer replenishment agreement, top-up request = agreed target balance − verified posted trust balance, subject to the agreement, any disputed items, and a lawyer’s review. Do not automatically add unbilled WIP to that request if the agreement calls only for restoration to a fixed target. If the upcoming stage needs more than the target can cover, discuss and document a separate funding decision.
The example below is hypothetical. It assumes that an invoice was properly issued, that the withdrawal shown is permitted, and that there is no dispute.
| Item | Amount | What it means |
|---|---|---|
| Agreed target balance | $5,000 | Level to restore under the agreement |
| Agreed review trigger | $2,000 | Point at which the firm reviews the account |
| Initial deposit posted to trust | $5,000 | Opening client ledger balance |
| Properly applied invoiced fees | −$3,400 | Recorded withdrawal after the required billing steps |
| Verified posted trust balance | $1,600 | Below the review trigger |
| Separate unbilled WIP estimate | $900 | Planning figure; no trust withdrawal yet |
| Proposed top-up | $3,400 | $5,000 target less $1,600 posted balance |
The $900 WIP figure tells the lawyer how quickly coverage may fall. It does not turn the proposed top-up into $4,300 or reduce the client ledger to $700. If a pending deposit, chargeback, bank delay, or disputed transfer exists, verify it before stating an available balance to the client.
A seven-step retainer replenishment workflow
Assign one owner to each retainer replenishment handoff. The trust ledger and engagement terms should be the source of truth; an email or spreadsheet reminder is only a prompt to check them. This retainer replenishment workflow works with manual review or configured software alerts.
1. Record the agreement and matter settings
Store the signed engagement agreement, the relevant funding terms, the client or matter designation, and the responsible lawyer with the matter. Record the floor, target, review frequency, preferred contact method, and any client-specific billing contact. If different matters share a client, confirm which funds are available for which work under the agreement and governing rules.
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Mark the funding status as active, paused, closing, or disputed. This gives the reviewer context before a request is drafted. A figure copied from a prior matter is an especially easy source of error.
2. Generate a retainer replenishment review queue
For retainer replenishment, check balances after bills and authorized transfers post, at a regular billing review, and before significant work phases. The queue should show the client, matter, posted trust balance, threshold, target, last bill, recent transactions, pending deposits, and next milestone. Route each flagged matter to a named reviewer.
An alert can open a task. It should not silently send a client demand based only on a stale or mismatched number. Reconcile exceptions and verify the ledger before the client sees an amount. The Law Society of Ontario’s trust-account guide describes the underlying duty to keep client trust money separate and maintain appropriate records.
3. Review exceptions and work ahead
The billing coordinator checks whether the latest invoice was issued, a trust payment was posted, a deposit is pending, the matter is nearing close, or the client has challenged a charge. The responsible lawyer checks upcoming work and decides whether the agreed target is suitable.
Pause automated reminders if the balance or bill is disputed or the client is already discussing payment terms with the lawyer. Record who owns the question and when the firm will answer it. A bookkeeping correction should be completed through the proper process before a fresh retainer replenishment figure is sent.
4. Calculate and approve the amount
Calculate retainer replenishment from the agreement’s formula and the verified client or matter ledger. Show the calculation in the review task: target, posted balance, proposed top-up, ledger date, and any reason for a different amount. Do not count a payment merely promised by the client as cleared trust funds.
Have the lawyer or an authorized reviewer approve the client-facing request, especially when the amount differs from the standard formula or the matter has a live dispute. The review should cover wording as well as arithmetic. A request for a new deposit is not a bill for completed services.
5. Send one clear client notice
State the matter, balance as of a date, agreed minimum and target if useful, requested amount, due date, secure payment method, and a contact for questions. If the current statement explains how prior funds were used, link or attach it through an appropriate channel. Avoid sending detailed trust information to an unverified email recipient.
Here is a plain-language example for an agreement using the numbers above:
Subject: Trust deposit top-up for your matter
Hello [Client],
Your trust balance for [Matter] was $1,600 as of [date]. Under our engagement agreement, we review the balance when it falls below $2,000 and ask you to restore it to $5,000. Please add $3,400 by [date] using [secure payment method]. Your latest statement shows the activity applied to your deposit. If you have a question about the balance or need to discuss the timing, please contact [name] at [contact].
Thank you, [Firm]
Use the firm’s own approved wording. If a deposit is required before a specific task, describe the actual plan and deadline only after the lawyer has assessed the client’s interests and obligations. Do not threaten automatic withdrawal in a routine payment notice.
6. Receive, allocate, and confirm the deposit
Match the incoming payment to the right client, matter, and trust account. Follow local rules and the payment processor’s treatment of advance funds. Check whether funds are actually received and available before treating them as usable; an authorization or payment link click is not the same as a settled deposit.
Record the receipt in the client ledger, update the request status, and send a concise confirmation. If the client paid less than requested, show the remaining gap and ask the lawyer whether to revise the work plan. Never cover one client’s shortage with money belonging to another client. Reconcile the bank, trust records, and individual client ledgers according to the jurisdiction’s requirements; the ABA model trust-account record rules describe the kinds of records a U.S. firm may need under its adopted rules.
7. Escalate an unanswered request without abandoning the matter
If the due date passes, confirm the message reached the correct person, then send a measured follow-up. Give the responsible lawyer the current balance, WIP, critical dates, client response, and the next work at risk. The lawyer decides whether to continue, narrow the work with proper client agreement, negotiate funding, or consider withdrawal under the governing rules.
Nonpayment does not end the lawyer’s duties by itself. ABA Model Rule 1.16 addresses withdrawal for a substantial failure to meet an obligation after reasonable warning, subject to tribunal permission where required and steps to protect the client. The Law Society of Ontario’s withdrawal guidance has its own conditions, including special attention to upcoming proceedings. Apply the actual local rule and matter facts; do not let an automated status change decide the issue.
Keep trust, billing, and communication records aligned
Retainer replenishment is easier to explain when the client can see a consistent story: deposit received, work billed, permitted application of funds, remaining balance, new request, and later deposit. In a retainer replenishment record, the trust ledger tracks money, the bill explains fees, and the matter record shows client communication and approval.
Reconcile before treating a mismatch as a client shortfall
If the bank amount, firm trust records, and individual client ledgers do not agree, investigate the difference. A low balance caused by a misposted receipt, duplicate withdrawal, or delayed bank transaction is not a valid reason to press the client for more money. Use the firm’s established correction and escalation procedure.
Do not wait for month-end reconciliation to discover that an individual matter balance is wrong. The low-balance review is an additional operational check, while the formal reconciliation must still happen on the required schedule. Keep proof of the correction and the updated client statement.
Separate a fee dispute from a top-up discussion
A client may say the underlying bill is wrong. Identify the disputed line or transfer and review the agreement, invoice, approval, and ledger. The ABA Model Rule 1.15(e) addresses funds in which interests are disputed under the model rule. Local trust rules and the particular dispute control what may be moved or held.
Tell the client who is reviewing the issue and when to expect a response. Keep any undisputed funding need distinct from the contested amount. A repeated automated top-up email while a billing objection is unresolved can make the firm appear to have ignored the complaint.
Close the loop when work ends
When the matter closes, stop low-balance tasks and open requests. Prepare the final bill and account, determine who is entitled to any remaining trust funds, and return or transfer them under the client’s instructions and governing rules. An evergreen arrangement should not keep producing requests for a matter with no authorized work left.
How RunSensible can support the process
RunSensible’s trust accounting feature describes client and matter ledgers, trust requests, reports, and connections with billing and matter management. Its Trust Management help page shows a trust request with a date, due date, client, amount, client- or matter-level designation, and ways to share the request. Those capabilities can help a firm keep its retainer replenishment records together.
Use a ledger report to confirm the balance, a matter task for human review, a trust request for the approved amount, and a payment record to close the loop. A firm should test the exact configuration it uses, including permissions and payment routing. Do not assume that a low-balance email is sent automatically or that software alone determines whether a transfer is permitted.
The related invoicing feature can help show bills and account history alongside the trust record. Keep the client-facing explanation short enough to understand without exposing unrelated matter information.
Common mistakes in evergreen retainer management
Sending a notice from an unreconciled balance
A report is only as good as its transactions. Confirm recent deposits, billing applications, reversals, and client allocation before stating a balance. If the numbers do not agree, fix the record first.
Using an arbitrary threshold for every matter
A fixed percentage ignores how work varies across practice areas and stages. Set the floor with the next billing cycle and expected work in mind. Review it when a matter’s scope changes, and obtain any necessary client agreement before changing the funding terms.
Confusing an advance deposit with earned revenue
Newly paid trust money is not automatically a firm fee. Keep retainer replenishment separate from the invoice and any permitted trust-to-operating transfer. Follow the adopted rule, agreement, and proper billing steps.
Sending repeated reminders during a dispute
Let an exception status pause routine messages. Have a human investigate the disputed bill, explain the outcome, and then decide whether a revised request is appropriate.
Treating nonpayment as automatic permission to stop
A missed top-up calls for a lawyer’s decision that accounts for deadlines and the client’s interests. Review the applicable withdrawal rules, give required notice, and seek tribunal permission when needed. A software rule should never terminate representation.
Frequently Asked Questions
What is retainer replenishment?
It is a request for the client to add new advance funds when an agreed evergreen retainer reaches a review level. The agreement should explain the trigger, target amount, calculation, and timing. The deposit must be handled under the applicable trust rules.
When should a law firm ask a client to top up a retainer?
Use the agreement’s trigger, then check the posted ledger and work ahead. A firm may review before a major phase even if the balance has not crossed the standard floor. The amount and timing should be reasonable for the matter and communicated clearly.
How do I calculate the replenishment amount?
For a simple restore-to-target agreement, subtract the verified posted trust balance from the agreed target. Review pending payments, disputes, and matter-specific terms before sending the figure. Unbilled WIP is a planning input; it does not itself reduce the posted trust ledger.
Can the firm withdraw the new deposit as soon as it arrives?
Do not assume so. An advance deposit generally remains client money until the applicable rules and agreement allow a withdrawal. ABA Model Rule 1.15 and Ontario’s guidance each address when advance fees may move, but the firm must follow the rule governing its own matter and fee arrangement.
Is a low trust balance the same as an overdue bill?
No. A low balance describes the advance funds still held for the client. An overdue bill concerns payment for invoiced work. They may coexist, but the firm should show and explain them separately.
Can a firm use a different client’s funds while waiting for the top-up?
No. Client trust money must remain allocated and accounted for under the governing rules. Investigate a shortage immediately through the firm’s trust-account process; do not use another client’s balance as a bridge.
What if the client disputes the invoice that lowered the balance?
Pause routine reminders, identify the disputed amount, review the bill and trust transaction, and explain the next step to the client. Follow local rules for handling disputed funds. The remaining funding need, if any, should be discussed without treating the contested item as resolved.
Can the lawyer stop work if the client does not replenish?
Not automatically. The lawyer must consider the agreement, deadlines, client prejudice, reasonable warning, professional rules, and any need for court or tribunal permission. Assign the decision to a lawyer rather than to a billing automation.
Conclusion
The best retainer replenishment process starts with clear terms and ends with a verified ledger entry, not just a payment reminder. The firm checks the balance, looks at upcoming work, approves an accurate request, records the receipt, and follows up on exceptions. A low-balance alert can make that work timely, but the lawyer and accounting team must control the decisions.
Start by testing this workflow on a few active matters. Compare each request with the agreement, the trust ledger, and the client’s latest statement. Fix the points where a reviewer cannot explain the amount in one or two sentences.
Resources
- ABA Model Rule 1.15: Safekeeping Property — model U.S. treatment of client funds and advance fees.
- ABA Model Rule 1.16: Declining or Terminating Representation — model withdrawal conditions and protective steps.
- ABA Model Rules on Client Trust Account Records — model record categories; adopted local requirements may differ.
- Law Society of Ontario: Guide to Managing Trust Accounts — Ontario trust-account and recordkeeping guidance.
- Law Society of Ontario: Fees, Disbursements, and Billings — Ontario guidance on moving billed fees from trust.
- Law Society of Ontario: Withdrawal from Representation — Ontario conditions and process.
Disclaimer: The content provided on this blog is for informational purposes only and does not constitute legal, financial, or professional advice.
