Flat Fees vs. Billable Hours: The Case Against Hourly Billing

What Is Flat Fee Billing?

Hourly billing is the model the American Bar Association’s Commission on Billable Hours described as dominant in the profession: firms bill clients for the hours worked by lawyers and paralegals, multiplied by each timekeeper’s standard billing rate. A flat fee is the principal alternative: a fixed amount agreed upon before the work is performed.

Flat fees are not a fringe idea. The ABA’s national ethics guidance, Formal Opinion 93-379, recognizes a fixed amount as a legitimate basis for a fee alongside hourly rates and estimates. ABA Model Rule 1.5, the national model rule adopted in some form by nearly every U.S. jurisdiction, requires that all fees be reasonable and that the basis of the fee be communicated to the client, preferably in writing, before or shortly after the representation begins. The ABA even maintains a national resource page on alternative fee arrangements, and the Commission’s own survey, reported at the time by the Law Society Gazette, found that 55% of responding lawyers had used a fixed or flat fee in the preceding twelve months.

Why Flat Fees: The ABA’s Own Indictment of the Hour

The strongest institutional criticism of hourly billing comes from the ABA itself. Its Commission on Billable Hours concluded that the billable hour is fundamentally about “quantity over quality, repetition over creativity,” and its core recommendation was to adopt billing methods that measure value to the client rather than time consumed.

The academic literature reaches the same conclusion. Brooke MacKenzie, writing in the Canadian Bar Review, found that hourly billing fails to create any incentive for lawyers to work efficiently, can actively reward those who work inefficiently, and often fails to offer predictability to clients on a budget. Professor William G. Ross’s foundational study of billing ethics, The Honest Hour, likewise concluded that the billable hour diminishes the incentives for expeditious work, a finding still cited in current scholarship.

A flat fee inverts the incentive: because the price cannot grow, the lawyer profits by resolving the matter efficiently, not by prolonging it. That is precisely the value-over-time logic the ABA Commission urged the profession to adopt.

The client-side evidence is national as well. An ABA Section of Litigation consumer research study by Leo J. Shapiro & Associates found that of all criticisms consumers raise about lawyers, the greatest number of complaints arise around fees: consumers say lawyers charge too much, are not up front about fees, and are unwilling to account for their charges or hours.

The Negatives of Billable Hours

You Cannot Verify the Bill, Including Who Did the Work

Time entries are generated inside the law firm, and no client is present when they are recorded. The scholarly literature has long recognized the consequence: Professor Ross called the padding of bills the “perfect crime,” because it is nearly impossible to prove that any individual time entry was exaggerated. ABA Formal Opinion 93-379 acknowledged the same opacity from the regulator’s side, warning that the bases for charges often are not disclosed in advance or are disguised in cryptic invoices so that the client does not fully understand exactly what is being charged.

Staffing is a specific dimension of that opacity: who actually performed the work, and at what rate? In Missouri v. Jenkins, 491 U.S. 274 (1989), the U.S. Supreme Court confirmed that paralegal work is properly billed at paralegal market rates, a separate and lower rate category from attorneys. Fee-arbitration guidance instructs arbitrators reviewing disputed bills to examine staffing directly: invoices should identify each timekeeper, and the overuse of associates or inexperienced attorneys is treated as a suspicious circumstance. The State Bar of California’s Arbitration Advisory 2003-01 and Arbitration Advisory 2016-02, the most detailed published guidance in the country on detecting bill padding and widely cited beyond that state, note that in some firms the time entries ultimately charged to the client are recorded not by the person who did the work but by a support person such as a secretary, paralegal, or billing clerk. This guidance exists because of a flaw inherent in hourly billing everywhere: clients cannot independently verify the hours, the tasks, or whether the person doing the work matched the rate being charged.

Block billing, lumping multiple tasks into one undifferentiated time entry, compounds the problem nationally. The same California advisory concludes that block billing reduces accountability and may inflate billed time by 10% to 30%, and federal courts across the country have reduced fee awards for overstaffing and time spent on unsuccessful claims where the billing records did not let the court meaningfully assess whether the time was reasonable, as in Jacobs v. Memphis Convention & Visitors Bureau.

Rounding Up Is Built Into the System

Under hourly billing, time is never billed exactly as spent. ABA Formal Opinion 93-379 states the national rule: a lawyer may not bill more time than she actually spends on a matter, except to the extent that she rounds up to minimum time periods such as one-quarter or one-tenth of an hour. Rounding up, in other words, is the one officially sanctioned form of charging for time that was never worked, and it is embedded in standard practice across the profession. California’s fee-arbitration guidance quantifies the effect: high minimum increments are flagged as a padding indicator that may increase billed time by 15% to 25%, and entries perpetually rounded to the full hour are listed among the classic markers of bill padding.

Beyond permitted rounding, the empirical record shows how the line is routinely crossed nationwide. In Professor Ross’s 2007 survey of 5,000 attorneys across the country, reported by the Wall Street Journal, two-thirds of respondents said they had specific knowledge of bill padding, a finding virtually identical to his 1995 survey, and 54.6% admitted they had sometimes performed unnecessary tasks just to increase their billable output. None of this arithmetic exists under a flat fee, where no increments are recorded and there is nothing to round.

Double Billing: A Multi-State Consensus Problem

The hourly model also invites billing the same hour to more than one client. ABA Formal Opinion 93-379 addressed this directly: a lawyer who spends four hours on behalf of three clients has not earned twelve billable hours, and a lawyer who reuses old work product has not re-earned the hours previously billed.

This is not one state’s position, but rather a nationwide consensus. The North Carolina State Bar’s 2022 Formal Ethics Opinion 4 adopted the ABA’s conclusions and collected agreeing opinions from other jurisdictions, including Oregon Formal Opinion 2005-170 (billing two clients for the same time means billing more time than the lawyer actually worked) and Alaska Formal Opinion 96-4 (a lawyer traveling for one client while drafting for another may not charge both). The D.C. Bar reached the same conclusion in Ethics Opinion 267, quoting the ABA’s rule that a lawyer billing hourly is never justified in charging for hours not actually expended. Regulators across the country wrote these opinions because the abuses keep happening. They are a recurring feature of hourly billing itself, and none of them can occur under a flat fee, because there are no hours to bill in the first place.

The Total Cost Cannot Be Promised

Hourly billing’s defining feature is that the fee is a function of hours that have not yet been worked. The ABA’s national guidance requires only that the lawyer identify the basis of the fee, an hourly rate or an estimate, but not a binding total, and it expressly contemplates that developments during the representation can render an earlier estimate substantially inaccurate. Ethics rules police dishonest hours, but as the Canadian Bar Review analysis notes, professional responsibility rules say very little about charging too much for good work. A technically honest hourly bill can still balloon far past what the client expected without violating any rule.

The incentive structure makes this worse everywhere. The ABA Commission’s report discusses a professional norm of roughly 2,000 to 2,100 billable hours per year per attorney, creating institutional pressure to accumulate hours, a dynamic examined at length in the New Hampshire Bar Journal. Formal Opinion 93-379 opens by acknowledging exactly this: pressure on lawyers to bill a minimum number of hours, and on firms to maintain profits, appears to have led some lawyers into problematic billing practices. A flat fee, agreed before work begins, gives the client the total at the outset, which is precisely why Model Rule 1.5’s demand that the basis of the fee be communicated up front is satisfied most completely by a fixed price.

Conclusion

The case against the billable hour is national, and it is made by the profession’s own institutions: the ABA’s ethics committee, the ABA’s blue-ribbon commission, a multi-state consensus of ethics regulators from North Carolina to Oregon to Alaska to the District of Columbia, the U.S. Supreme Court’s fee jurisprudence, and decades of academic study. Hourly billing produces bills the client cannot verify, permits rounding up as formal ethics doctrine, invites double billing serious enough that bar regulators across the country have had to prohibit it in writing, and cannot promise a total price. The flat fee, a fixed price disclosed and agreed before the work is done, is the model the ABA’s own commission pointed the profession toward more than two decades ago.