Billable hours in law are the units of time your attorney spends doing work tied directly to your case, recorded in small increments and multiplied by an agreed hourly rate to produce the charges on your invoice. If you are paying a lawyer by the hour, every entry on the bill should reflect a specific task performed for your matter, documented in enough detail that you can tell what was done and judge whether the time spent was reasonable.
The mechanics look simple on the surface. The rules around what qualifies, how time is recorded, and what you can push back on are where most clients get caught off guard.
What a Lawyer Can Put on Your Bill
A task is billable when it directly advances your matter. That includes legal research, drafting documents like contracts or motions, communicating with opposing counsel or witnesses, preparing for and attending court hearings, and meeting with you to discuss strategy or gather facts. The common thread is that someone could point to the work product and say the work was done for your file specifically.
Plenty of what a lawyer does in a day never reaches your invoice. Internal firm meetings, staff training, business development, marketing, writing proposals, bookkeeping, and general office administration are non-billable overhead. Those costs get built into the hourly rate rather than itemized separately, which is part of why rates look high relative to a salary figure.
Travel is handled on its own terms. Most attorneys will not bill their full hourly rate for sitting on a plane or driving to a courthouse. Instead, the engagement letter typically treats travel as a reimbursable expense covering airfare, mileage, or hotel costs. If your case involves significant travel, pin down the arrangement in writing before the work begins.
How Time Gets Measured
Most law firms track time in tenths of an hour, splitting each hour into six-minute blocks. A four-minute phone call rounds up to 0.1, and a seven-minute email exchange records as 0.2. The full conversion runs from 0.1 for one to six minutes up to 1.0 for fifty-five to sixty minutes. 1United States District Court Northern District of California. Billing Increment Chart – Minutes to Tenths of an Hour
Some firms use quarter-hour increments instead, recording time in fifteen-minute blocks. Under that system, any task lasting between one and seven minutes rounds to zero, while eight to twenty-two minutes rounds to 0.25. Quarter-hour billing is less common in legal work but it still shows up. The increment matters more than it sounds: a dozen short phone calls billed in six-minute increments will cost less than the same calls billed in fifteen-minute blocks.
What a Time Entry Should Look Like
Each entry needs a client matter number, the date the work was done, the name of the professional who did it, the time spent, and a description of the specific task. The description is where most problems start. “Legal research” tells you nothing. A defensible entry reads more like “researched case law on statute of limitations for breach of fiduciary duty claim in response to defendant’s motion to dismiss.”
The biggest red flag on an invoice is block billing. Block billing lumps multiple tasks into a single time entry, something like “reviewed pleadings, drafted discovery requests, responded to client emails (3.6 hours),” with no breakdown of how long each task took. Nobody reviewing that entry can tell whether the time was reasonable, because there is no way to evaluate the tasks independently.
Courts take this seriously. In one California case, an attorney sought fees for 600 hours of work but was awarded only 71 hours, because block billing made it impossible to determine which time was actually spent on the relevant motion. The vague entries damaged the credibility of the entire fee request. Corporate legal departments routinely reject block-billed invoices for the same reason. If your lawyer’s bill reads like a narrative paragraph instead of a task-by-task list, that is worth raising.
Itemized billing assigns a separate time value to each discrete task. “Reviewed pleadings (0.7); drafted requests for admission (2.3); responded to client email regarding discovery deadline (0.6)” lets you evaluate reasonableness line by line.
What Hourly Rates Look Like
Rates vary widely based on who is doing the work, where they are doing it, and how specialized your matter is. Junior associates commonly bill between $200 and $400 per hour. Senior partners at large firms can exceed $800. Rates in major metropolitan areas run higher than in smaller markets.
Rates have also been climbing faster than general inflation. A 2025 analysis of U.S. law firms found that worked rates increased 7.4 percent year over year, well above the 2.8 percent inflation rate. If you signed an engagement letter two years ago, do not assume the same rates still apply without checking the current invoice against the agreement.
How Rates Get Set and Changed
Under the ABA’s Model Rule 1.5, an attorney must communicate the basis or rate of the fee to you before or within a reasonable time after starting the work. The rule says this should “preferably” be in writing, and most firms use a formal engagement letter that spells out the hourly rate for each person who might work on your matter. 2American Bar Association. Rule 1.5 Fees For non-contingency arrangements, a written agreement is not strictly required under the model rules, but it is standard practice and protects both sides.
Any change to the rate or fee basis must also be communicated to you. 2American Bar Association. Rule 1.5 Fees If a firm raises its rates annually, you should be notified in writing before the new numbers hit your invoice. A rate increase that shows up on a bill with no prior notice is solid ground to push back.
Alternatives to Hourly Billing
Hourly billing is not the only option, and the shift toward alternatives has been accelerating.
- Flat fees: a single fixed price for a defined scope of work. Common for routine matters like forming an LLC, drafting a will, or handling an uncontested divorce. You know the total upfront.
- Contingency fees: the attorney gets paid only if you win, taking a percentage of the recovery, typically 25 to 40 percent. Standard in personal injury and medical malpractice, but prohibited in certain matters including criminal defense and divorce. 2American Bar Association. Rule 1.5 Fees
- Capped fees: work is billed hourly, but the total cannot exceed a pre-agreed ceiling.
- Blended rates: a single averaged rate regardless of which attorney on the team does the work.
- Retainers: an upfront amount that the firm draws against as work is performed. Some are replenished monthly; others function as a flat prepayment for ongoing availability.
Contingency fee agreements must be in writing and signed by you. They must spell out the percentage, how expenses are deducted, and whether expenses come off before or after the fee calculation. 2American Bar Association. Rule 1.5 Fees That level of documentation is an ethical requirement, not a preference.
Ethics Rules That Govern Billing
Model Rule 1.5 is the backbone of billing ethics for attorneys. It requires that every fee be reasonable, judged against factors including the time and labor involved, the difficulty of the legal questions, the skill required, the results obtained, and the customary rates in the area. 2American Bar Association. Rule 1.5 Fees “Reasonable” is the word that prevents a two-hour research task from being billed as six.
ABA Formal Opinion 93-379 gets more specific. Double billing, meaning charging two clients for the same block of time, is flatly prohibited. If an attorney spends three hours on a flight and works on two client matters during the trip, the total billable time is three hours split between them, not three hours billed to each. Padding hours beyond time actually spent is similarly banned. So is tacking surcharges onto expenses or adding general office overhead to your bill without disclosure.
Consequences for billing misconduct range from a private reprimand to suspension or disbarment, depending on severity and pattern. Bar disciplinary boards handle billing complaints regularly, and courts have sanctioned attorneys for inflated fee petitions.
Reviewing Your Invoice and Disputing Charges
When an invoice arrives, do not just check the bottom line. Read the individual time entries. Look for vague descriptions, unusually long blocks of time on routine tasks, or work you did not authorize. Compare the entries against the scope of work in your engagement letter.
Payment terms vary. Some firms expect payment within 30 days, others within 15 or 60, and many apply late fees on overdue balances. Those late fee terms must be spelled out in your engagement agreement to be enforceable; a firm cannot invent penalties after the fact. The allowable rate varies by state, but a typical cap runs around 1.5 percent per month.
If you believe you have been overbilled, you do not have to choose between paying quietly and suing. Most state bar associations run fee arbitration programs built specifically to resolve billing disputes outside of court. Under the ABA’s model rules for fee arbitration, the process is voluntary for the client but mandatory for the attorney once you initiate it. It is meant to be faster, cheaper, and more confidential than litigation. 3American Bar Association. Model Rules for Fee Arbitration Rule 1 Not every state has adopted this exact framework, but most offer some version of bar-sponsored dispute resolution.
The engagement letter that sets your rates also defines the scope of work. If something on the invoice falls outside that scope, or if the total hours seem disproportionate to the results, asking for an explanation is not adversarial. It is the transparency the billing system is supposed to provide.