How to Bill for Phone Calls as an Attorney
Ask an attorney which billable work is most likely to go unbilled, and the honest answer is almost always the same: phone calls. A call arrives while you are drafting, or walking to your car, or standing in a hallway at the courthouse. You answer it, you give real legal advice, and then you return to whatever you were doing. No timer was running, nothing was written down, and by Friday the call has vanished from memory. Multiply that by every short call in a week and the lost revenue becomes significant, which is a pattern we walk through in detail in our post on the five ways billable time leaks out of your week.
Billing properly for phone calls involves four separate skills. You need to round the time correctly, describe the call in a way the client will accept, set expectations so the charge never comes as a surprise, and, hardest of all, capture the call at all. This guide covers each one.
Step one: round the call to your billing increment
Most law firms bill in six-minute increments, which are tenths of an hour, a convention we cover fully in our complete guide to time tracking for lawyers. Under the standard convention, each call is rounded up to the next increment. A four-minute call bills as 0.1 hours. An eleven-minute call bills as 0.2 hours. A twenty-five-minute call bills as 0.5 hours. If your firm uses quarter-hour increments instead, the same logic applies with fifteen-minute blocks, although tenths are far more common in legal practice because they track less coarsely to the actual work.
Two practices keep call rounding defensible. First, apply the rule consistently. If a ninety-second scheduling call rounds up to 0.1 hours, that is a legitimate application of a disclosed increment policy, but it should be the same policy you apply to every call for every client. Second, round each call from its actual duration rather than from a guess. An attorney who estimates call lengths from memory at the end of the week tends to remember a twelve-minute call as "about ten minutes" and a seven-minute call as "about five," and the rounding then compounds the underestimate. The actual duration is sitting in your phone's call log, and it is almost always longer than you remember.
Step two: write a description the client will not dispute
The line item "Telephone call, 0.2" invites a dispute. The client cannot remember what it was about, cannot connect it to any progress on the matter, and therefore reads it as padding. A strong call description answers three questions in a single line: what activity happened, who was involved, and what purpose it served on the matter.
Weak: "Telephone call with client." Strong: "Telephone conference with client regarding revisions to the settlement demand and strategy for the mediation scheduled for March 4."
The strong version takes fifteen extra seconds to write and it changes how the invoice reads. The client sees work advancing the matter rather than a meter running. A few guidelines make this easy to sustain:
- Name the counterpart. A conference with opposing counsel, a witness, or the client are all different kinds of work, and the description should say which one occurred.
- State the subject, not the content. You need "regarding deposition scheduling," not a summary of the advice given. Keep privileged detail out of invoices that may be forwarded, audited, or submitted with a fee petition.
- Write it while the call is fresh. A description written the same day is specific. A description written the following week is "telephone call with client," because that is all you can remember.
- Avoid block billing. Do not bury a call inside a combined entry such as "calls, emails, and review of file, 1.5." Courts and fee auditors routinely discount block-billed entries, and clients distrust them for the same reason: nobody can tell what any piece cost.
Step three: set expectations before the first invoice
Most disputes over call charges are really disputes over surprise. A client who did not know calls were billable feels ambushed by a page of 0.1 and 0.2 entries, even when every entry is legitimate. The fix belongs in the engagement letter and in your first substantive conversation. Say plainly that telephone calls, like email and document work, are billed at your hourly rate in six-minute increments, and that this includes short calls.
Some attorneys go one step further and tell clients how to use that policy to their own advantage. Encourage the client to batch questions into one call instead of five separate two-minute calls, since five separate calls round to 0.5 hours while a single ten-minute call rounds to 0.2. Clients respect an attorney who explains the meter, and the conversation itself demonstrates that your timekeeping is careful rather than casual.
You should also decide, in advance, which calls you will not bill. Many attorneys write off purely administrative calls, such as a client confirming an appointment time. That is a fine policy, but make it a deliberate one. Write the call down, mark it as no-charge on the invoice, and let the client see the courtesy. A visible no-charge entry builds more goodwill than silently doing free work the client never learns about.
Step four: capture the call at all, which is the hard part
Everything above assumes the call made it onto your timesheet, and that assumption fails constantly. Rounding rules and description formulas are useless for a call you never recorded. The failure is structural rather than personal. Calls are interrupt-driven work. They arrive at the moments you are least prepared to log them, they frequently happen away from your desk, and they are individually so short that each one feels too small to bother writing down, even though the annual revenue those forgotten calls represent is anything but small. Studies of attorney timekeeping consistently find that time reconstructed after the fact understates what was actually worked, and short calls are the first thing the reconstruction misses.
There are three ways to close the gap, in ascending order of reliability:
- Log the call immediately after it ends. This is the classic discipline. It works when you are at your desk with your timekeeping system open, and it fails in parking lots, hallways, and evenings, which is exactly where the leaked calls happen.
- Sweep your call log at the end of each day. Your phone already records every call with its exact duration. A five-minute end-of-day review of the call log, matching numbers to clients and entering the time, recovers most of what the immediate-logging habit misses. Its weakness is that it depends on you actually doing it every day, and the descriptions get weaker as the memory fades.
- Capture calls automatically. On Android, an app can observe call activity directly, with your permission, and turn it into draft time entries without you doing anything at the moment of the call, a pipeline we explain step by step in our technical walkthrough of automatic call tracking on Android. This is the approach TrackTime takes. Inbound and outbound cellular calls are timed and matched to the client automatically, and each captured call appears in the web dashboard as an entry you review, adjust, describe, and approve before it ever reaches an invoice. The same app also captures time spent texting clients in Google Messages and working in Gmail and Outlook, which are the other two places short client work goes to die.
One honest caveat belongs here. This kind of capture is only possible on Android. iOS does not allow any app to observe calls, message notifications, or foreground apps at the operating-system level, so genuine automatic call capture does not exist on iPhone, whatever any marketing page implies. If you carry an iPhone, the end-of-day call log sweep in option two is your best available tool.
A second point matters specifically for attorneys: what the capture tool stores. TrackTime stores metadata only, meaning who the communication involved, when it happened, and how long it lasted. It never stores message contents or email subject lines. For work that is subject to privilege, that distinction is the difference between a tool you can adopt and a tool you cannot.
The review step protects both you and the client
Automatic capture does not mean automatic billing, and it should not. Captured calls are drafts. Before invoicing, you review each entry, confirm the client match, write the description while the call is still recent, and mark personal or no-charge calls accordingly. The lawyer decides what is billable; the system's job is simply to make sure the decision gets made about a complete record instead of a remembered one. In practice this review takes a few minutes and replaces the far longer Friday ritual of staring at a blank timesheet trying to recall the week.
Frequently asked questions
Should I bill for a two-minute phone call?
If the call involved legal work, such as advice, strategy, or substantive updates, then yes, and under a six-minute increment policy it bills as 0.1 hours. If the call was purely administrative, many attorneys record it and mark it no-charge, which documents the work while extending a visible courtesy. The important thing is that the choice is a policy you apply consistently, not a shrug.
How do I bill a call that covers two different matters?
Split it. Estimate the portion of the call spent on each matter, create a separate entry for each with its own description, and round each entry to your increment. A single blended entry billed to one matter is inaccurate for both clients and is the kind of record that does not survive scrutiny.
Can I bill for leaving a voicemail or for a missed call?
A substantive voicemail, in which you actually convey legal information or a meaningful update, is billable work and typically rounds to a minimum increment. A missed call with no work performed is not billable. If the missed call prompted you to review the file before calling back, the review and the return call are the billable events.
What if a client pushes back on call charges?
Walk the record. This is where contemporaneous capture and specific descriptions pay off, because you can show the client the date, the duration, and the purpose of every call rather than defending a vague estimate. Most disputes dissolve when the client sees a precise record. If you conceded the point, a partial credit on a disputed entry costs far less than the relationship, but you should not routinely write off documented work.
Stop losing the calls before you can bill them
Rounding conventions and description formulas are the easy half of billing for phone calls. The hard half is having a record of the calls at all, and that is a capture problem rather than a discipline problem. Start a free 7-day TrackTime trial and see how many billable calls a week of automatic capture finds, or read about how the Android app works.