Most lawyers use billing increments of six minutes, meaning every task is recorded in tenths of an hour and any task shorter than six minutes rounds up to a full 0.1. A two-minute email and a six-minute email cost the same. At a $400 hourly rate, that minimum slice is $40, and across a busy month the rounding on small tasks stacks into real money.
How the Six-Minute Increment Works
One hour divides into ten equal parts of six minutes each, recorded as 0.1 of an hour. Twelve minutes is 0.2, eighteen is 0.3, and so on up to 1.0 for a full sixty minutes. The rule that catches clients off guard is the rounding: any task lasting between one and six minutes triggers a full 0.1 charge. A lawyer who spends ninety seconds reading your email and replying “acknowledged” logs the same increment as one who spends the full six minutes drafting a substantive answer.
The increment is a minimum floor, not a stopwatch. That single fact reshapes how hourly billing actually works in practice.
What the Rounding Actually Costs You
Clients tend to assume they pay for time spent. Under increment billing, you pay for the number of discrete tasks multiplied by the minimum increment. An attorney who batches your five questions into one call bills you once. An attorney who answers five separate emails bills five increments. At $400 an hour, those five emails cost $200 even if the total working time was closer to ten minutes.
Stacked across dozens of small interactions in a month, the rounding overhead can add hundreds or thousands of dollars to a bill. The structure of how you and your lawyer communicate matters as much as the substance.
Ten- and Fifteen-Minute Increments
Not every firm uses six minutes. Some bill in fifteen-minute increments (0.25 of an hour) or ten-minute increments (roughly 0.17 of an hour), and the cost difference on small tasks is sharp. A three-minute email at $400 per hour costs $40 under six-minute billing and $100 under fifteen-minute billing. A twenty-two-minute research task rounds to 0.4 hours ($160) under six-minute billing and 0.5 hours ($200) under fifteen-minute billing.
Over a case with hundreds of small tasks, that difference can inflate your total by 30% or more. Larger increments appear more often in smaller firms and in practice areas like criminal defense and family law. The profession has broadly shifted toward six minutes because clients and courts pushed back on the built-in inflation of longer ones. Before signing a retainer, ask which increment the firm uses. If the fee agreement is silent, ask anyway; silence can default to the firm’s longer standard.
What Should and Should Not Appear on Your Bill
Billable work is work that requires professional judgment: drafting and reviewing documents, researching case law, preparing for hearings, taking depositions, corresponding with opposing counsel, and advising you by phone or email. Court appearances are billed for every hour spent, and travel to and from the courthouse is often included.
Purely clerical work generally should not appear at an attorney’s rate. Scheduling, internal filing, processing payments, and photocopying are overhead. Line items like “organized case file” or “filed documents with clerk” billed at a partner’s rate deserve a question. Paralegal work sits on a line: a paralegal summarizing deposition testimony is doing substantive legal work and billing for it is standard practice; a paralegal making copies is not. Your fee agreement should list which timekeepers bill for what, and at what rate.
Block Billing and Why It Matters
Block billing lumps multiple tasks into a single time entry with one combined total. Instead of separate lines for research (0.5), drafting a motion (1.2), and a client call (0.3), you see one entry: “Research, draft motion, client call — 2.0 hours.” You have no way to evaluate whether any individual piece took a reasonable amount of time.
Courts have grown hostile to the practice, especially in fee-shifting cases where the losing party pays the winner’s legal fees. Federal courts routinely reduce block-billed fee awards, with cuts commonly in the 10–20% range and steeper reductions for egregious cases. In a 2024 New York case, a judge cut an $83,000 fee request in half because block billing made it “impossible to determine exactly what tasks were performed.”
If your invoices consistently use block entries, ask for itemization. You are entitled to know how each hour was spent, and a lawyer who resists that transparency is inviting the same scrutiny courts have already signaled they apply.
When Billing Increments Cross an Ethical Line
Every state has adopted some version of ABA Model Rule 1.5, which prohibits unreasonable fees. The rule lists eight factors, including the time and labor required, the difficulty of the legal questions, the customary rate in the area, the results obtained, and the lawyer’s experience.1American Bar Association. Rule 1.5 Fees A fee does not have to be fraudulent to violate the rule; it only has to be unreasonable measured against those factors.
Minimum billing increments themselves are not unethical. Six-, ten-, and fifteen-minute minimums have all been accepted as legitimate. The practice crosses into misconduct when it becomes abusive, such as billing two separate fifteen-minute charges for two five-minute calls that fell inside the same fifteen-minute window.
Double Billing
Double billing occurs when a lawyer charges two clients full rate for the same block of time. The classic example is an attorney flying to a deposition for Client A while reviewing documents for Client B on the plane. Billing both clients for those hours violates Rule 1.5 because the lawyer did not actually spend separate time on each matter. The ethical approach is to split the time or bill only the client whose travel triggered the trip.
Discipline for Overbilling
Overbilling can escalate to bar discipline, including suspension and disbarment. The standard is clear and convincing evidence, and sanctions are most likely when there are aggravating factors: dishonesty, misuse of client funds, conflicts of interest, or refusal to negotiate when a client raises a problem.2American Bar Association. When Overbilling Leads to Disciplinary Sanctions Even without intent to defraud, collecting an excessive fee can be a violation on its own.
Reading Your Invoice
A properly formatted legal invoice breaks each charge into its own line with four pieces of information: the date, the initials or name of the timekeeper, a narrative description, and the time recorded in decimal hours next to that person’s rate. The charge on each line is the decimal times the rate.
Check the timekeepers first. Partners, associates, and paralegals should each have distinct rates. A paralegal’s name next to a partner’s rate is an error or something worse. Then read the descriptions. Vague entries like “review file” or “work on case” tell you nothing and deserve a follow-up. Good descriptions name the document reviewed, the person called, or the legal question researched. Finally, look at the increments themselves. Fifteen separate 0.1 entries in a single day is 1.5 billed hours for tasks that might have added up to forty minutes of real work. Count them; the rounding overhead on days like that is worth raising.
Disputing a Bill
Start with your fee agreement and compare its terms against the invoice: hourly rates, billing increment, caps, and any estimates that were discussed. If the bill contradicts the agreement, that is a straightforward contract issue.
If the charges technically comply with the agreement but seem excessive, raise it directly with your lawyer first. Most billing disputes stem from miscommunication, and many lawyers will adjust entries when a client points to something specific. “I see four separate 0.1 entries for emails on June 12th, could those have been handled in one review?” gets further than “this bill is too high.”
When direct negotiation fails, most state and local bar associations run fee arbitration programs that are faster and cheaper than a lawsuit. Under the ABA’s model rules for fee arbitration, participation is mandatory for the lawyer once a client requests it.3American Bar Association. Model Rules for Fee Arbitration Rule 1 Not every state adopts the model exactly. Some make arbitration voluntary for both sides; others make it binding only when both parties agree in advance. Contact your state bar for the program in your jurisdiction. Fee arbitration typically does not cover claims that your lawyer’s errors harmed your case; those are malpractice claims and need a separate attorney.
Keeping Your Bill Down
The single most effective move is reducing the number of separate interactions. Every quick email or short voicemail triggers at least one increment. Batch your questions into one email or save them for a scheduled call. Five questions in one email cost 0.1 hours; five separate emails cost a minimum of 0.5.
Organize your documents before handing them over. A lawyer spending two hours sorting a shoebox of receipts is billing clerical work at a professional rate. Label documents, put them in chronological order, and include a short summary of what each one is.
Ask for a budget estimate and check in against it. Most lawyers will give a range for each phase of a matter when asked. Request monthly invoices so you catch cost overruns early instead of discovering a large surprise at the end of a quarter. Ask whether associates or paralegals can handle routine tasks. Research that takes a partner an hour at $500 might take a second-year associate ninety minutes at $250, and the difference compounds over a long matter.
What to Nail Down in the Fee Agreement
Under ABA Model Rule 1.5(b), lawyers must communicate the scope of the representation and the basis or rate of the fee before starting work, or within a reasonable time after.1American Bar Association. Rule 1.5 Fees The rule says “preferably in writing,” and you should insist on writing. A verbal understanding about rates leaves you with no leverage when the first invoice arrives.
The written agreement should specify the billing increment (six, ten, or fifteen minutes), the hourly rate for every person who might work on your case, which categories of work are billable, how expenses like filing fees and copying costs are handled, whether a retainer deposit is required, and how unused retainer funds are returned. Look at the language on rate increases too. Some agreements let the firm raise rates annually with notice; others lock the rate for the duration of the matter. On a case that could run for years, a locked rate is worth negotiating.
Alternatives That Avoid Increments Entirely
Hourly billing is not the only option. Flat fees cover an entire matter for a fixed price and work best for predictable work: a will, an uncontested divorce, forming a business entity, closing a real estate transaction. The risk shifts to the lawyer, and you stop watching the clock.
Contingency fees are standard in personal injury, medical malpractice, and some employment cases. The lawyer takes a percentage of the recovery, typically one-third, and charges nothing if you lose. Contingency agreements must be in writing and must spell out the percentage, how expenses are deducted, and what you owe regardless of outcome.1American Bar Association. Rule 1.5 Fees They are prohibited in criminal defense and most divorce cases. Hybrid arrangements split the difference, pairing a reduced hourly rate with a smaller contingency bonus above a threshold. If your matter has a defined scope, asking about alternatives is always worth the conversation.