Billable time on a legal bill is any work a lawyer, paralegal, or other timekeeper performs that directly advances your specific matter, recorded in small time increments and multiplied by that person’s hourly rate. Out-of-pocket costs the firm pays on your behalf, like court filing fees or expert witnesses, get added on top as separate line items. Once you know what qualifies, what doesn’t, and how the increments work, you can read an invoice line by line and push back on anything that doesn’t belong there.
What Counts as Billable Work
The simplest test: if a task moves your specific matter forward, it is almost certainly billable. Drafting court filings, reviewing documents produced in discovery, researching statutes or case law relevant to your issue, and communicating with opposing counsel all qualify. So do depositions, court hearings, mediations, and strategy sessions among the legal team when the discussion focuses on your case. The common thread is that someone with specialized training is applying that training to your problem.
Plenty of shorter tasks also count. A five-minute phone call in which your attorney answers a question about next steps is billable. An email exchange with opposing counsel about a scheduling conflict that affects your trial date is billable. Internal meetings where two lawyers debate whether to file a particular motion on your behalf are billable too, because those conversations shape the outcome of your case even though you were not in the room.
What Should Not Appear on Your Invoice
General office overhead never belongs on your bill. Scheduling internal meetings, processing the firm’s own invoices, filing documents into the firm’s system, training new staff, and social pleasantries are costs the firm absorbs as the price of running a business. A line item for “office administration” or “file organization” with no substantive legal work described is worth questioning.
Most disputes live in the gray area between the two. A paralegal spending twenty minutes organizing your case file to prepare for a deposition may be billable, because the work directly serves your matter. That same paralegal reorganizing the firm’s general filing system is not. When the narrative on an entry does not reference your case specifically, ask what it was for.
How Billing Increments Work
Most law firms track time in tenths of an hour, so each increment represents six minutes. A two-minute phone call rounds up to 0.1 hours (six minutes), and a fourteen-minute research task rounds up to 0.3 hours (eighteen minutes). This is the most common system in legal billing because it captures short tasks without inflating them too dramatically.
Some firms use quarter-hour increments instead, meaning every task rounds up to the nearest fifteen minutes. A seven-minute call becomes 0.25 hours. The difference adds up fast. If your lawyer handles fifteen short tasks in a day under a quarter-hour system, the rounding alone can add more than an hour to your bill compared to the six-minute system. Your engagement letter should specify which increment the firm uses, and the detail is worth checking before you sign.
The ethical concern is padding. Rounding a four-minute call to six minutes is standard under the six-minute system. Rounding that same call to fifteen minutes under a quarter-hour system starts to look like billing for time the firm did not spend. Ethics rules require that billed time reasonably reflect actual effort, and firms that routinely round up aggressively risk crossing that line.
Reimbursable Expenses on the Bill
Your invoice will include more than hourly charges. Reimbursable expenses are out-of-pocket costs the firm pays on your behalf and passes through to you. Court filing fees are among the most common. In federal district court, filing a new civil action costs $405, which includes a $350 statutory fee and a $55 administrative fee set by the Judicial Conference.1Office of the Law Revision Counsel. 28 USC 1914 – District Court Filing and Miscellaneous Fees State court filing fees vary widely by jurisdiction and case type, running anywhere from under $200 to several hundred dollars.
Expert witnesses are often the largest expense category. Average hourly rates run roughly $350 to $480 per hour depending on whether the expert is reviewing documents, sitting for a deposition, or testifying at trial. Specialists in high-demand fields like medicine or engineering often charge significantly more. Large-scale document production, process server fees, and specialized courier services also show up as pass-through costs.
Travel expenses are billed when your case requires off-site work. Airfare, hotel stays, and mileage all appear on the invoice. For 2026, the IRS standard mileage rate for business travel is 72.5 cents per mile.2IRS. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Most engagement agreements specify that expenses are billed at actual cost, though some firms add a small processing markup. If your agreement allows a markup, it should say so explicitly.
What the Engagement Letter Locks In
Before any billable work begins, you should receive a written engagement letter laying out the fee arrangement. Professional ethics rules require the basis or rate of the fee, and the expenses you will be responsible for, to be communicated to you in writing either before representation starts or within a reasonable time after.3American Bar Association. Model Rules of Professional Conduct – Rule 1.5 Fees This letter is your contract, and it governs what can and cannot appear on your bill.
A good engagement letter specifies the billing increment the firm uses, each professional’s hourly rate, which categories of expenses are reimbursable, whether any markup applies to expenses, and the payment terms. It should also describe the scope of the work. If you hired a firm for a contract dispute and later see entries for unrelated tax advice, the engagement letter is your first line of defense. The time to negotiate billing terms is before the work starts, not after a $40,000 invoice arrives.
Hourly billing is not the only option. Flat fees are common for predictable tasks like drafting a will or handling a straightforward real estate closing. Contingency arrangements, where the lawyer takes a percentage of any recovery instead of charging hourly, dominate personal injury and some employment cases. Subscription and hybrid arrangements are growing as well. If hourly billing does not fit your situation, ask about alternatives during the engagement letter stage.
The Ethical Limits on What Can Be Billed
The foundational ethics rule is that a professional cannot charge an unreasonable fee. The ABA Model Rules list several factors that determine reasonableness, including the time and labor required, the novelty and difficulty of the issues, the skill needed, the customary fee in the area for similar work, and the results obtained.3American Bar Association. Model Rules of Professional Conduct – Rule 1.5 Fees A lawyer who bills 200 hours for a routine contract review will have a hard time arguing that fee is reasonable under any of those factors.
Double billing is flatly prohibited. If a lawyer spends two hours researching a legal question that applies to both your case and another client’s case, those two hours cannot be billed at the full rate to both of you. The lawyer must divide the time or bill each client only for the portion that specifically advanced their matter. Billing both clients for the same block of work violates the duty to charge only for time actually spent on a given matter.
Corporate clients often enforce billing rules that go beyond baseline ethics requirements. Outside counsel guidelines from large companies may restrict which attorneys can work on a matter, require pre-approval for legal research beyond a certain number of hours, cap travel and meal expenses, and prohibit billing for overhead like photocopying. If you are a business retaining outside counsel for significant litigation, publishing your own billing guidelines gives you contractual leverage to reject noncompliant charges.
Retainers and Trust Accounts
Many firms require an upfront retainer deposit before starting work. That money does not go into the firm’s operating account. Ethics rules in every state require lawyers to hold unearned client funds in a separate trust account, often called an IOLTA (Interest on Lawyers’ Trust Accounts) account, until the fees are actually earned.4American Bar Association. Model Rules of Professional Conduct – Rule 1.15 Safekeeping Property As the firm performs work and generates billable entries, it draws down from the retainer. You should receive regular statements showing how much remains.
An “evergreen” retainer works like an automatic refill. You deposit a set amount, the firm bills against it, and when the balance drops below an agreed threshold you replenish the account back to the original level. The engagement letter sets both the initial deposit and the replenishment trigger. This structure keeps the firm funded without requiring you to pay large invoices after the fact, but it also means budgeting for periodic top-ups throughout the engagement.
Be cautious about any language calling a retainer “non-refundable.” Ethics authorities have consistently held that a lawyer must refund any portion of a prepaid fee that has not been earned if the representation ends. Labeling a retainer as non-refundable can mislead clients into thinking they have lost that money regardless of whether the work was performed. If your engagement letter includes that term, ask the firm to explain exactly what it means and consider requesting a revision.
Reading a Billable Entry Narrative
Every billable entry should capture four things: the date the work occurred, the duration in the firm’s chosen increment, a client-matter code that ties the charge to your specific file, and a narrative describing what was done. The narrative is the part that matters most to you as the client. “Legal research, 2.5 hours” tells you nothing. “Researched federal circuit court decisions on enforceability of non-compete clauses in employment agreements, 2.5 hours” tells you exactly what you are paying for. When you see a vague entry, ask for a more specific description before you pay it.
Disputing a Charge That Looks Wrong
If something on the invoice does not look right, raise it promptly. Most firms will adjust or write off a disputed entry rather than damage the client relationship, especially if you can point to a specific problem with the narrative or a charge that falls outside the engagement scope. Waiting months to dispute a bill weakens your position considerably.
When a conversation with the firm does not resolve a billing dispute, most state bar associations operate fee arbitration programs built for this situation. These programs provide an informal, lower-cost forum for resolving fee disagreements. In many states the process is mandatory for the lawyer if you request it, meaning the firm cannot refuse to participate. You typically initiate the process by contacting the bar association in the county where the legal services were primarily provided.
Fee arbitration programs generally handle disputes ranging from roughly $1,000 to $50,000, though exact thresholds vary by state. For disputes above those limits, or when the issue involves more than just the amount of the fee, such as an allegation of incompetent work, a formal malpractice claim or ethics complaint may be more appropriate. Lawyers are generally required to notify you of your right to seek fee arbitration, though enforcement of that notice requirement varies.