Attorney retainers: classic vs. security

A retainer is money paid to an attorney before the work begins — but that single word covers two legally different arrangements, and the difference decides whether your money is refundable. A classic (general) retainer purchases the attorney's availability and is earned the moment it is paid. A security (advance-payment) retainer is a deposit held in a trust account and billed against as hours are worked, with the unused balance returned to you. Typical consumer retainers run $2,500 to $10,000, and nearly all of them are security retainers in practice. This guide explains both types, the trust-account rules that protect your deposit, evergreen replenishment clauses, and what happens to the money when the engagement ends.

The classic retainer: buying availability

The classic retainer — also called a general or true retainer — is the older and rarer of the two forms. The client pays a fixed sum for the attorney's availability over a period: the promise to take the client's calls, to remain conflict-free from adverse parties, and to prioritize the client's matters when they arise. Because the thing purchased is the promise itself, the fee is earned on receipt and is generally non-refundable, even if the client never calls. Businesses use classic retainers to keep outside counsel on standby; a company might pay a firm a monthly sum so that a competitor can never hire that firm against it. Individual consumers rarely need a classic retainer, and rarely benefit from one — if a lawyer proposes a non-refundable fee to a consumer, the reason deserves scrutiny, and several state bars scrutinize exactly that.

The security retainer: a deposit billed against

The security retainer — also called an advance-payment retainer or advance fee deposit — is what almost every consumer actually signs. The client deposits a sum, the firm holds it in trust, and the firm's hourly billing draws the money down as work is performed: each invoice shows the hours worked, the amount transferred from the deposit, and the remaining balance. Three consequences follow. Firstly, the money remains the client's property until it is earned. Secondly, the unused balance is refundable when the matter ends. Thirdly, the firm must account for every transfer, which is why security-retainer invoices show a running trust balance. A $5,000 retainer at a $300 hourly rate secures roughly 16.7 hours of work; when the case needs more, the replenishment clause below activates.

Trust accounts and IOLTA: where the money sits

Unearned client money cannot be mixed with the firm's own funds. Every state requires deposits to sit in a client trust account, and pooled client funds are typically held in an IOLTA account — Interest on Lawyers' Trust Accounts — whose interest funds legal aid programs. The rules are strict and enforcement is real: commingling client funds with firm funds, or drawing fees before they are earned, is among the most common grounds for attorney discipline in every state. For the client, the practical protections are simple: your deposit must be identifiable, your invoices must account for it, and you may ask for a trust ledger of your money at any time. A firm that hesitates at that request is telling you something.

Evergreen clauses: the replenishment obligation

Most retainer agreements include an evergreen clause: when the trust balance falls below a stated floor — say $1,500 on a $5,000 retainer — the client must top it back up, so the firm always works against secured funds. Evergreen clauses are lawful and standard, but they are also where hourly engagements surprise people, because the initial retainer is a deposit, not a price. A contested divorce that begins with a $3,500 retainer can require several replenishments before it resolves. Before signing, ask three questions: what is the floor that triggers replenishment; how much must each replenishment be; and what happens — withdrawal, work stoppage, or negotiation — if you cannot fund one mid-case. The answers belong in the written agreement, not in a hallway conversation.

Retainers by practice area

Retainer sizes track the expected first phase of work. Contested divorce commonly opens with $2,500–$5,000 against $200–$400 hourly rates. Criminal defense engagements frequently take the full flat fee up front — functionally a retainer earned per the agreement's milestones — with serious felonies billed hourly against larger deposits. Contested probate and business disputes follow the hourly deposit model. On the other side of the spectrum, contingency matters like car accident claims require no retainer at all — the firm is paid from the recovery, which is the subject of our contingency fees guide. Where you live moves the numbers too: deposits track local hourly rates, which our state and city pages localize with cost-of-living data.

Ending the engagement: refunds, disputes, and your rights

When a matter ends — by completion, by your choice, or by the firm's withdrawal — the accounting is mechanical: earned fees and advanced costs are deducted, and the remaining trust balance is refunded. You may discharge your attorney at any time, for any reason; the firm keeps what it has earned and returns what it has not. If you dispute an amount, the disputed portion must remain in trust until the dispute resolves, and every state bar operates a fee-arbitration program that resolves retainer disputes without a lawsuit. Two documents make any dispute short: the signed agreement and the invoices. Keep both, read both, and raise questions in writing while the engagement is live — a question asked at invoice three is a conversation; the same question asked a year later is a claim.