ABA Model Rule 1.5 is the ethics rule that governs attorney fees. It forbids a lawyer from agreeing to, charging, or collecting an unreasonable fee or an unreasonable amount for expenses, requires the lawyer to communicate the basis of the fee to the client, imposes extra conditions on contingency arrangements, bans contingency fees in two categories of cases, and restricts how lawyers at different firms may divide a fee.1American Bar Association. Rule 1.5 Fees Every state has adopted some version of it, though the details vary by jurisdiction.
How a Fee Is Judged Reasonable
Rule 1.5(a) sets no dollar cap. Instead, it lists eight factors that disciplinary authorities weigh together to decide whether a particular fee crosses the line.1American Bar Association. Rule 1.5 Fees The factors cover the time and labor the matter required and the difficulty of the questions involved; whether taking the case foreclosed other work; the fee customarily charged in the locality for similar services; the amount at stake and the result obtained; the time limits imposed by the client or the circumstances; the nature and length of the professional relationship; the lawyer’s experience, reputation, and ability; and whether the fee is fixed or contingent.
No single factor controls. A high hourly rate is not automatically unreasonable: a veteran lawyer handling a complex dispute under pressure can justify billing that would be indefensible for routine work. Context drives the analysis. The flip side is that a lawyer who charges premium rates for straightforward work and produces mediocre results will have a hard time defending that bill if a client challenges it.
What the Lawyer Must Tell You About the Fee
Rule 1.5(b) requires the lawyer to communicate three things: the scope of the representation, the basis or rate of the fee, and any expenses the client will be responsible for. That communication must happen before the representation begins or within a reasonable time after. The rule says it should “preferably” be in writing, which is close to mandatory in practice, because a lawyer who relies on an oral agreement will struggle to prove what was actually disclosed if a dispute arises later.1American Bar Association. Rule 1.5 Fees
One exception: if the lawyer regularly represents the client and will charge on the same basis or rate as before, a fresh disclosure for each new matter isn’t required. For everyone else, expect an engagement letter spelling out the work, the billing method, and the costs the client bears. Any later change to the fee structure or rate must also be communicated.
What a Lawyer Can and Can’t Add as Expenses
Most legal bills include line items beyond the lawyer’s time: copying, electronic research, courier charges, long-distance calls. ABA Formal Ethics Opinion 93-379 draws the line directly. General overhead such as rent, utilities, and staff salaries cannot be billed separately, because those costs are already built into the hourly rate. The lawyer can pass through the actual cost of services used for the client’s matter, but the charge has to reflect the actual cost, not a marked-up price.2American Bar Association. Formal Ethics Opinion 93-379 A firm that charges twenty-five cents per page for copies that cost three cents is treating overhead as a profit center, which the rule doesn’t permit. If expense entries look inflated, the lawyer bears the burden of showing they track real costs.
Contingency Fee Agreements
A contingency fee pays the lawyer only if the client wins or settles. It is the standard structure for personal injury work and makes legal help accessible when hourly billing is out of reach. Because payment depends on outcome, Rule 1.5(c) imposes stricter formalities than it does for other fee arrangements.1American Bar Association. Rule 1.5 Fees
Every contingency fee agreement must be in writing and signed by the client; an oral contingency arrangement is unenforceable under the model rule. The writing must state the percentage the lawyer takes if the case settles before trial, goes through trial, or reaches appeal, because those percentages often differ. It must explain whether litigation costs such as filing fees, expert witnesses, and deposition transcripts come out of the recovery before or after the lawyer’s percentage is calculated. That ordering can shift thousands of dollars between client and lawyer. And if the client will owe money for costs even in a loss, the agreement has to say so.
When the case ends, the lawyer owes the client a written closing statement showing the total recovery, how the fee was calculated, what was deducted for costs, and the amount the client receives. That document is where the math from the closing table gets matched against the deal that was originally signed.
Statutory Caps That Override the Agreement
The model rule itself sets no maximum percentage, but federal law does in certain contexts. Under the Federal Tort Claims Act, attorney fees are capped at 25% of a court judgment or litigation settlement and 20% of an award resolved administratively. A lawyer who exceeds those limits faces a fine of up to $2,000, up to one year in prison, or both.3Office of the Law Revision Counsel. 28 US Code 2678 – Attorney Fees; Penalty
Social Security disability cases carry their own ceiling. Under the fee agreement process, the lawyer’s fee cannot exceed the lesser of 25% of past-due benefits or $9,200.4Social Security Administration. Fee Agreements Veterans Affairs disability claims limit attorney fees to 20% of any backpay awarded. Several states impose sliding-scale caps on contingency fees in medical malpractice cases, where the lawyer’s percentage drops as the recovery grows. These statutory limits override whatever percentage the engagement letter sets.
Where Contingency Fees Are Prohibited Outright
Rule 1.5(d) bans contingency fees in two situations.1American Bar Association. Rule 1.5 Fees
The first is any fee in a domestic relations matter that depends on securing a divorce or on the amount of alimony, support, or property division. Tying the lawyer’s pay to the size of a divorce settlement creates an incentive to escalate conflict rather than reach a fair resolution. There is one narrow carve-out: after a final judgment is entered, a lawyer may take on a contingency basis the collection of unpaid alimony or support, because the underlying obligation is already fixed.
The second is any fee for representing a defendant in a criminal case. Criminal defense requires undivided loyalty, and a fee that hinges on acquittal would distort the lawyer’s judgment on plea negotiations, trial strategy, and witness decisions. The prohibition applies regardless of the charge.
Dividing a Fee With a Lawyer at Another Firm
Rule 1.5(e) allows lawyers from different firms to split a fee only under conditions designed to prevent pure referral payments.1American Bar Association. Rule 1.5 Fees Three requirements all have to be met.
Each lawyer’s share must either match the work that lawyer actually performed, or both lawyers must assume joint responsibility for the representation. The client must agree to the arrangement, including each lawyer’s share, and confirm that agreement in writing. And the combined fee cannot exceed what a single lawyer could reasonably charge for the same work.
The joint-responsibility option is what makes referral-style arrangements workable. A lawyer who refers a complex matter to a specialist can still receive part of the fee without doing proportional work, but only by taking on malpractice liability for the whole case. That is a real obligation, not a formality. What the rule prevents is a lawyer handing off a case, doing nothing further, bearing no risk, and still collecting a cut. If neither the proportional-work test nor the joint-responsibility test is satisfied, the split violates the rule no matter what the client agreed to.
When a Client Challenges the Bill
The official comment to Rule 1.5 addresses fee disputes directly. If the state bar has set up a fee dispute resolution procedure such as arbitration or mediation, the lawyer must participate when the procedure is mandatory, and the comment says the lawyer “should conscientiously consider submitting to it” even where it is voluntary.5American Bar Association. Rule 1.5 Fees – Comment About a dozen states make fee arbitration mandatory at the client’s request; most others offer it voluntarily.
In any challenge, the lawyer carries the burden of documenting the time spent and showing the fee was reasonable. Contemporaneous records with date, task, and time entries are the strongest defense, and their absence is often the strongest evidence against the lawyer. Reconstructed billing done from memory months later starts the lawyer at a disadvantage before the reasonableness factors are even reached.