What Is a Retainer Agreement and How Does It Work?

A retainer agreement is the written contract between you and a lawyer that spells out what work the lawyer will do, how the fees will be calculated, and how your money will be handled along the way. In most cases you pay an amount upfront, the lawyer puts it in a trust account, and fees come out of that balance as work is actually performed. Anything the lawyer hasn’t earned is still your money.1American Bar Association. Rule 1.15: Safekeeping Property

What a Retainer Agreement Covers

Professional ethics rules expect lawyers to communicate the scope of the work and the basis for the fee in writing before starting or shortly after.2American Bar Association. Rule 1.5: Fees A typical agreement addresses the same core topics:

  • Scope of representation. This identifies the specific matter the lawyer is handling and draws a line around what’s included. A wrongful termination case would normally stop at that dispute; a company might retain a firm for everything arising from a particular deal.3Legal Information Institute. Retainer Agreement
  • Fee structure. Hourly, flat fee, contingency, or a hybrid of these.3Legal Information Institute. Retainer Agreement
  • Retainer amount. The upfront payment, which for advance fee retainers is deposited into a trust account and drawn down as the lawyer earns it.
  • Expenses and costs. Court filing fees, expert consultations, travel, and similar items that are separate from the lawyer’s own time.
  • Billing practices. How often invoices arrive (monthly is common), how charges are itemized, and when payment is due.
  • Termination clause. How either side can end the relationship, what notice is required, and how outstanding fees and your file are handled.

A well-drafted agreement also sets out your side of the deal: supplying requested documents, responding to the lawyer in reasonable time, and keeping payments current.

The Main Types of Retainers

The label on the agreement is not just terminology. It determines who owns the money at any given moment and whether it belongs in a trust account or the firm’s operating account.

Advance Fee Retainer

This is the most common arrangement. You pay an upfront sum that the lawyer deposits into a client trust account. The money stays yours until the lawyer earns it by performing work, at which point the earned portion moves to the firm’s operating account. If the matter ends with money left over, the balance is returned to you.1American Bar Association. Rule 1.15: Safekeeping Property This is sometimes called a security retainer, because the funds act as a deposit securing the lawyer’s availability while protecting your ownership of what hasn’t been earned.

General Retainer

A general retainer, sometimes called a true retainer, is a flat fee paid to guarantee the lawyer’s availability for a set period or a particular type of work. It compensates the lawyer for holding themselves available to you, not for specific billable hours. Firms typically treat this fee as earned on receipt, so it goes to the operating account rather than trust. Additional fees usually apply for actual legal work performed during the period.4American Bar Association. Lawyer Retainers: Definition, Purpose, and Ethics

Evergreen Retainer

An evergreen retainer is a variation of the advance fee model built for ongoing representation. You deposit an initial amount, and as the lawyer bills against it you replenish the balance to an agreed minimum. If the floor is $5,000 and the balance drops to $2,000, you top it back up. The structure keeps a continuous funding source in place and is common in business relationships with steady but unpredictable legal needs.5Federal Bar Association. Lawyer Retainers: Definition, Purpose, and Ethics

Hybrid Arrangements

Some agreements blend payment structures. The most common pairing is a reduced hourly rate with a contingency component. A lawyer who normally charges $400 per hour might bill $150 in exchange for a percentage of any recovery. The lawyer gets regular cash flow, you get lower out-of-pocket costs during the case. Hybrids are most common in business litigation. If you’re considering one, read closely what happens if you settle on your own or switch lawyers midway, because most hybrid agreements adjust the hourly rate upward if the contingency piece falls through.

Where Your Money Sits Until It’s Earned

Lawyers face strict obligations around client money. Advance fee retainers and other prepaid funds must be deposited into a client trust account that is entirely separate from the firm’s business accounts.1American Bar Association. Rule 1.15: Safekeeping Property Mixing client money with firm money, known as commingling, is one of the most common grounds for attorney discipline.6Federal Bar Association. Four Tips to Stay Compliant with IOLTA Account Rules

Most of these trust accounts are IOLTA accounts, short for Interest on Lawyers’ Trust Accounts. Each state runs an IOLTA program that directs the interest earned on pooled client funds to legal aid organizations and access-to-justice programs. Neither you nor the lawyer receives that interest.7American Bar Association. A Guide to Ensuring IOLTA Account Compliance

The flow is simple. Your payment goes into trust. The lawyer performs work and sends you an itemized bill. Earned fees transfer from the trust account to the firm’s operating account. Only unearned client funds belong in trust; depositing personal or firm funds beyond the small amount permitted to cover bank service charges is a commingling violation.1American Bar Association. Rule 1.15: Safekeeping Property

Your Right to Get Unearned Fees Back

Money the lawyer hasn’t earned by performing work is still your money, no matter what the agreement calls it. When representation ends for any reason, the lawyer must refund whatever is unearned.

The ABA reinforced this in Formal Opinion 505, which directly addressed labeling fees “nonrefundable” or “earned upon receipt.” The opinion says a lawyer cannot sidestep the obligation to safeguard client funds by relabeling an advance as nonrefundable. A fee isn’t truly earned until the services it covers are delivered, and unearned fees must be returned.8American Bar Association. ABA Issues Ethics Opinion to Guide Lawyers Handling of Prepaid Fees

State rules vary. Some states recognize true general retainers paid for availability alone as legitimately earned on receipt. But even there, if the fee is unreasonable relative to the availability actually provided, a refund may be required. The safest working assumption: if you paid money and the work wasn’t done, you should get it back.

Fees Have to Be Reasonable

Ethics rules don’t let lawyers charge whatever they want. Under the professional conduct rules adopted in every state, based on ABA Model Rule 1.5, a fee must be reasonable. Eight factors guide that determination:2American Bar Association. Rule 1.5: Fees

  • The time and labor required, the novelty and difficulty of the questions, and the skill needed to do the work properly.
  • Whether taking the case means turning away other work.
  • The fee customarily charged in the locality for similar legal services.
  • The amount involved and the results obtained.
  • Time limits imposed by the client or the circumstances.
  • The nature and length of the professional relationship.
  • The experience, reputation, and ability of the lawyer.
  • Whether the fee is fixed or contingent.

These factors work together. A $500 hourly rate may be perfectly reasonable for a complex patent case in a major city and unreasonable for a routine traffic matter in a small town. If you ever challenge a fee, these are the benchmarks a disciplinary body or arbitrator will use.

What to Check Before You Sign

The agreement is negotiable. A few clauses deserve real attention:

  • Who the client actually is. If a family member is paying your legal fees, the agreement should make clear that you, not the person writing the check, are the client. That controls confidentiality and decision-making.
  • Where representation ends. Does it cover an appeal if you lose? Enforcement if you win? Most agreements don’t, and you want to know before a verdict, not after.
  • What counts as an expense. Some firms bill separately for photocopies, postage, and paralegal time. Others absorb those costs. If the agreement is silent, assume you’re paying.
  • The replenishment trigger. For an evergreen retainer, know the minimum balance that forces a top-up and how fast you have to pay.
  • Termination terms. If you fire the lawyer or the lawyer withdraws, you should get an itemized accounting and a refund of unearned funds. Language suggesting otherwise is a red flag.
  • Dispute resolution. Some agreements require arbitration of fee disputes. Not necessarily bad, but you should know the rules before you’re in one.

If a lawyer resists putting the terms in writing, find a different lawyer.

If You End Up in a Fee Dispute

Disagreements over legal fees are common enough that most state bar associations run fee arbitration programs. Under the ABA’s model framework, arbitration is voluntary for the client but mandatory for the lawyer once the client requests it. The lawyer can’t simply refuse to participate.9American Bar Association. Model Rules for Fee Arbitration Rule 1

Under the model rules, before a lawyer can sue to collect unpaid fees, they must notify you in writing of your right to arbitrate. You then have 30 days to file a petition. Once you file, the lawyer must stop non-judicial collection activity until arbitration concludes. The decision becomes binding unless a party requests a trial within 30 days.9American Bar Association. Model Rules for Fee Arbitration Rule 1

Fee arbitration doesn’t cover every situation. It won’t apply if you’re alleging malpractice rather than disputing the bill, if a court has already set the fee, or if you wait too long after the representation ended (typically four years under the model rules). Your state’s program may differ in its details, so contact your local bar association for the specifics.