There are two ways to record billable time, and they do not produce the same invoice. You can log each task as it happens, contemporaneous entry, or you can reconstruct your day from memory that evening, that Friday, or on the last day of the month. The reconstructed version is always smaller. Not because you worked less, but because you forgot. This is the behavioral engine behind the biggest leak in law firm revenue leakage.
Memory is a leaky bucket, and it drains fast
Human memory for small, undifferentiated events decays sharply within hours. A day of legal work is exactly that: dozens of short tasks, a four-minute email here, a nine-minute call there, a document you glanced at between meetings. Each is trivial to log the moment it ends and nearly impossible to fully recover a week later. When you reconstruct, you do not deliberately shave time. You simply cannot see the tasks that have already faded, so they bill as zero.
And this loss sits on top of everything else. The hour you forgot to record never even enters the realization and collection math, because it was never billed. It is the purest possible loss: work delivered, value created, revenue vanished, and no report anywhere will ever show it as missing.
Why “just be disciplined” keeps failing
Every firm has told its lawyers to enter time contemporaneously. It rarely sticks, and not because lawyers are careless. Stopping to log a timer breaks concentration on the actual legal work, which is the thing the lawyer is paid to protect. So the timer loses, every time, to the brief that is due. Discipline is being asked to win a fight it is structurally set up to lose.
The mechanics of the increments themselves do not help, either. If you are fuzzy on how the tenths-of-an-hour system rounds, see billable hours, explained. But the increment math is not the problem here. The problem is that the recording depends on memory and willpower, two of the least reliable systems a firm owns.
| Reconstruct from memory | Caddi | |
|---|---|---|
| When time is recorded | Hours to weeks after the work | As the work happens, captured automatically |
| What it depends on | Memory and end-of-day willpower | A record of the work you already did |
| Typical result | Systematic under-billing no one can see | Entries that match the work performed |
| Cost to the attorney | Dreaded 9 p.m. and month-end timesheet marathons | A quick review of drafted entries |
The exit: connect the systems, then review
The way to get contemporaneous accuracy without the contemporaneous pain is to stop asking people to remember. Instead, connect the systems where the work already happens, calls in RingCentral, time in the inbox, to the billing tool you already use like TimeSolv or Clio, and let them draft the entries. The attorney never runs a timer and never reconstructs a day; they confirm drafted entries that reflect what they actually did. This is not a new timekeeping system watching over anyone; it is automation between the tools you already run, and it is how firms reclaim revenue that is already theirs. See how it works in automated time capture for law firms.
See how the fix works in practice in automated time capture for law firms, and how closing this leak fits the broader picture of matter economics and where the business of law pays off.
Bill for the work you actually did
See the law-firm overview, browse workflows Caddi runs today, or book a demo to watch Caddi connect your call, email, and billing systems into drafted entries.
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Frequently asked questions
What is contemporaneous time entry?
Contemporaneous time entry is recording your billable time as the work happens, or immediately after each task, rather than reconstructing it hours, days, or weeks later. It is the single most effective habit for accurate billing because it captures work while the detail is still fresh, before memory decays and entries start rounding down or disappearing.
Why is reconstructing time entries a problem?
Because memory is lossy and it fades fast. When attorneys rebuild their day at 9 p.m. or their month on the last day of it, they systematically forget short tasks, underestimate durations, and drop interruptions entirely. The result is under-billing that no one notices, because you cannot miss an hour you never remembered working. Reconstructed timesheets almost always bill less than the work actually performed.
How much billable time is lost by not recording contemporaneously?
Estimates vary, but timekeeping studies and firm audits consistently find meaningful losses that grow with delay: a slice of billable time disappears when entries are made at day's end, and a much larger slice when they wait until week or month end. The mechanism is simple, memory decay, and the loss compounds with the firm's realization and collection rates on top.
What is the best way to ensure contemporaneous time entry?
The most reliable fix is to remove the reliance on memory and discipline altogether, without adding another system. Connecting the tools where time is already spent, the phone system and the inbox, to the billing tool you already use turns that work into draft time entries for quick review. It gives you the accuracy of contemporaneous entry without asking anyone to stop and log a timer dozens of times a day.