Block billing by attorneys is the practice of lumping several tasks into one line on your invoice with a single combined time total, instead of listing each task on its own line with its own time entry. A block-billed line might read “Reviewed documents, drafted motion, and called opposing counsel — 3.5 hours,” which leaves you no way to tell whether the phone call took six minutes or an hour. The practice is not illegal and no rule formally bans it, but courts routinely cut fees that rely on it, and corporate legal departments often refuse to accept it. You can push back.
What a Block-Billed Entry Looks Like
Attorneys who bill hourly typically track time in increments of one-tenth of an hour, so every six minutes of work is the smallest unit on your bill. An itemized invoice assigns each task its own line:
- Review client documents: 1.0 hour
- Draft letter to opposing counsel: 0.8 hours
- Phone call with opposing counsel: 0.4 hours
A block-billed version of the same work reads: “Reviewed client documents, drafted letter to opposing counsel, and called opposing counsel — 2.2 hours.” The totals match. The detail is gone. You cannot verify whether the review really took an hour or whether the phone call lasted six minutes or twenty-four.
Why It Costs You Money
The core problem is that you cannot evaluate whether the time billed for any individual task was reasonable. Under ABA Model Rule 1.5, attorneys cannot charge unreasonable fees, and reasonableness depends on factors like the time and labor a task required, the difficulty of the legal questions, and the skill needed to handle the work.1American Bar Association. Model Rules of Professional Conduct Rule 1.5 Fees When tasks are collapsed into one entry, you cannot apply any of those factors because the per-task time breakdown does not exist.
Block billing also hides charges that would stand out if listed separately. Clerical work like photocopying, scanning, filing, and mailing is widely considered firm overhead that should not be billed to clients, even when an attorney or paralegal does it. Folded into a block entry alongside legal research or strategy, that routine work disappears into the total, and you end up paying attorney rates for it.
There is a staffing issue too. If a senior partner and a junior associate both touch your matter on the same day, block-billed entries make it hard to tell who did what. You lose the ability to question whether a $500-per-hour partner handled a task a $200-per-hour associate could have done equally well.
How to Spot It on Your Invoice
A few patterns give it away:
- Multiple actions in one entry. Any line describing two or more distinct tasks with a single time total is block-billed. Watch for conjunctions and semicolons stringing tasks together.
- Vague descriptions. “Work on case” or “attention to various matters” is worse than block billing because it does not even identify the tasks.
- Large time totals on a single line. A 4.0-hour entry for one clearly defined task is plausible; a 4.0-hour entry listing three or four tasks is a block bill.
- Substantive work mixed with administrative work. A line combining legal analysis with scheduling, filing, or correspondence is a red flag, and some of that work may not warrant attorney-rate billing at all.
Compare invoices month to month. If every entry on every invoice groups tasks together, the attorney is billing this way as a habit rather than as an occasional shortcut.
How Courts Treat Block Billing
When attorneys submit fee petitions asking a court to order the losing side to pay their fees, judges scrutinize the billing records. Courts have repeatedly held that block billing is not prohibited outright, but when it prevents the court from assessing reasonableness, a reduction in the fee award is appropriate.2Chambers and Partners. What Makes a Wage and Hour Attorneys’ Fee Award Reasonable
The usual remedy is a flat percentage cut. Courts have applied reductions ranging from 10% to 30% or more against block-billed hours, depending on how pervasive the practice was and how large the individual entries were. Entries that exceed roughly five hours draw especially heavy scrutiny, because a five-hour block can easily contain a mix of substantive and routine work the court cannot untangle.
This matters even if you are not in a fee dispute yourself. If a judge would not accept the invoice at face value, you have a reasonable basis for not accepting it either.
What You Can Do About It
Address It in the Fee Agreement
The best time to prevent block billing is before work begins. When you sign an engagement letter, look for provisions describing the billing format, the frequency of invoices, and the level of detail in each entry. Federal regulations governing certain government-related legal engagements require engagement letters to specify things like the date and description of each service and the name of the attorney who performed it.3eCFR. 10 CFR 719.21 – What Are the Required Elements of an Engagement Letter Nothing stops you from asking for similar terms in a private engagement. Request a clause stating that each task will be billed as a separate line item with its own time entry.
Ask for an Itemized Invoice
If you have already received a block-billed invoice, contact your attorney and ask for an itemized version. This is a reasonable request, not a confrontational one. Most billing software stores the underlying time entries even when the invoice presents them grouped, so producing a detailed version typically takes the firm’s billing department minutes. Be specific about what you want: separate line items for each task, with individual time entries and the name of the person who performed the work.
Use a Fee Dispute Program
If the attorney resists, or the itemized version reveals charges you believe are unreasonable, you have options beyond arguing with the firm. Most state bar associations operate fee dispute resolution programs that provide mediation or arbitration between attorneys and clients. You can usually find your state’s program through the bar association’s website. The process is typically faster and cheaper than a lawsuit, and it puts the billing records in front of a neutral evaluator who understands legal fee norms.
When a Grouped Entry Is Fine
Not every grouped entry is a problem. If your attorney spent fifteen minutes on three quick, closely related tasks, a single 0.3-hour entry describing all three is more practical than three separate 0.1-hour entries. The concern is when block billing becomes the default for large entries covering hours of mixed work. A rough test: if you can look at a grouped entry and tell roughly what share of the time went to each task, it is probably fine. If you genuinely cannot tell, ask for a breakdown.