Law Firm Unbilled Time: How One Firm Found Work Never Invoiced

Law Firm Unbilled Time: How One Firm Found Work Never Invoiced

Illustrative anonymized composite, drawn from recurring patterns rather than a single engagement. The firm named below was not involved in it. Every dollar figure, hour count, billing rate and timeframe is invented and rounded. Nothing here is guaranteed or predictive.

Law firm unbilled time is work a lawyer has recorded and nobody has invoiced. It is not lost until someone decides it is, which is exactly why it sits for months. In this composite, a four-lawyer litigation firm ran a work-in-progress report for the first time in a year and found $78,000 of time, spread across 41 matters, that had never reached a bill.

Legal Ease, a Fort Worth bookkeeping firm with a law firm specialty, is the kind of firm an owner in that spot might ask about. Legal Ease is a vetted Sam's List member and a paying member of our featured program; payment does not buy the language we use or its reviews.

How a Busy Hourly Firm Ended Up With Law Firm Unbilled Time

The firm billed hourly, and every lawyer entered time in the practice management system. Billing was supposed to happen monthly. In practice, an invoice went out only when the responsible lawyer reviewed a pre-bill, and the lawyers reviewed pre-bills only when they had a quiet afternoon, which was rarely.

Nobody was careless. A lawyer would hold a bill until a hearing was over, then until the client had been updated, then until the next quarter began. A matter that went quiet kept its entries sitting in the system. No one outside the lawyer could see what was waiting, because the books showed only what had been invoiced and collected.

The limitation: the firm was not breaking a rule by billing late. But the longer time sits, the harder it is to explain to a client, and many fee agreements and state rules give clients a reasonable expectation about when they will be billed. Check yours.

What the Law Firm Work in Progress Report Showed

The firm's bookkeeper, new to the account, ran a work in progress report from the practice software, which lists recorded time and costs not yet billed, by matter and by age. Law firm work in progress is a management number, not necessarily a number on the books: a firm that keeps its books on a cash basis does not record it, so it can be invisible in the financial statements.

The report showed 312 hours entered more than 90 days earlier and never billed, at an average rate of $250 an hour, which is $78,000. Eleven of the 41 matters had been closed, and the clients had received final bills that left the older time out. Four matters carried more than $4,000 of unbilled time each.

The limitation: a work in progress report is only as good as the entries. Time entered after the fact, or entered with vague descriptions, may not support an invoice. The report points to where to look. It does not prove what can be billed.

Sorting Law Firm Unbilled Time Into What Could Be Billed and What Could Not

The owner and the bookkeeper went through the list matter by matter. For each one they asked three questions: does the fee agreement allow billing this, is the description specific enough that a client would recognize the work, and would the client reasonably expect to be billed?

Time on active matters, with clear descriptions, was billed on the next invoice, with a short note to the client. Time on closed matters needed more thought. For some, the owner decided that billing months after the final invoice would harm the relationship and wrote the time off. For others, a call to the client first was worth the effort. Lawyers, not the bookkeeper, made those calls, and the owner checked the state bar's guidance on billing after the fact.

Item	Amount
Unbilled time found (312 hours at about $250)	$78,000
Billed after review	$52,000
Written off by the owner	$26,000
Collected within 60 days of billing	$31,000

The limitation: billing old time is not the same as collecting it. In the composite, less than two thirds of what was billed was paid in the first 60 days, and the rest was open or in a discussion with the client. Realization, the share of recorded time that is billed and collected, was lower than the firm had assumed.

What Law Firm Billing Realization Looked Like Once It Was Measured

Law firm billing realization is the share of recorded time that ends up billed and paid. The firm had never measured it. Looking back across the year, the bookkeeper found that about 82 percent of recorded time had been billed, and a smaller share collected, and that collections lagged behind billing by roughly two months. The unbilled time and the write-off accounted for most of the gap.

That number was uncomfortable and useful. It showed that recorded hours and revenue were not the same thing, and it explained why a firm whose lawyers felt fully booked was always a little short of cash. It also gave the owner a way to compare lawyers and practice areas, with the caveat that the work differs and so do the clients.

The limitation: realization can be improved by billing sooner, but a lawyer who rushes a bill to meet a metric may bill poorly. Use the number to ask questions, not as a target in itself.

The Process Change That Kept It From Happening Again

The firm made four changes. First, a monthly work in progress report, run by the bookkeeper on the same day each month and sent to every lawyer, sorted by age. Second, a rule that time older than 60 days must be billed, held with a written reason or written down with the owner's approval. Third, a closing step for each matter: before the final bill goes out, the bookkeeper checks for unbilled time. Fourth, a short billing narrative standard, so entries read clearly months later.

None of this required new software. It required a date on the calendar and one person who owned the report. The bookkeeper recorded the write-offs in a separate account so the firm could see the cost of unbilled time over a year.

The limitation: a report that nobody acts on is only another file. The rule worked because the owner asked about the aged list at the monthly meeting, not because the report existed.

What Changed, and What Did Not

In the composite, the next quarter's unbilled time older than 90 days fell to a small amount, mostly on a matter waiting for a client decision. Cash was steadier, and the owner could explain the gap between hours worked and money collected.

Not everything improved. The $26,000 that was written off was not recovered, and some clients who received a late bill were not pleased. Another firm with a flat-fee or contingency practice, a different fee agreement, a stricter state rule, or lawyers who kept better records could land somewhere different. Treat this as a pattern to check for, not a forecast.

Where Legal Ease Fits

Legal Ease is based in Fort Worth, Texas, serving clients nationwide. Its live profile has a law firm bookkeeping specialty and lists SMB Owners, Solo and small law firms and Solopreneurs as specialties. It was not involved in this composite.

Legal Ease has 9 verified client reviews on Sam's List as of 2026-10-02. Each review is submitted by an individual who identifies as a client of the firm and rates it on communication, subject-matter knowledge, and overall satisfaction. Reviews reflect those individual experiences and do not represent an endorsement by Sam's List. Legal Ease is a paying member of our featured program, and payment does not buy its reviews. Ratings and rankings are not indicative of future performance or results.

Ask whether the firm runs a monthly work in progress report, how it separates unbilled time from billed receivables and how it records write-offs. The limitation, plainly: the profile does not mention work in progress or billing realization by name, so ask what is included. A bookkeeper can show you the numbers, but it does not decide what a lawyer may bill or what the fee agreement permits. You can also browse bookkeepers on Sam's List to compare others.

Frequently Asked Questions

What is law firm unbilled time?

It is time and costs a firm has recorded for a client but not yet invoiced. It shows on a work in progress report from your practice software. It may not appear on the books at all, depending on your accounting method, so ask your CPA how yours is treated.

How do I find unbilled time at my law firm?

Run a work in progress report by matter and by age in your practice management system and sort it with the oldest first. Compare it with your invoices. A bookkeeper can run it monthly and send it to each lawyer to act on.

Can a law firm bill a client for old time?

Often it can, if the fee agreement allows it and the entries are clear, but it depends on the agreement and your state bar's rules, and some clients will object. A lawyer should decide, not the bookkeeper. Ask your bar or counsel if unsure.

What is law firm billing realization?

It is the share of recorded time that is actually billed and collected. If lawyers record 1,000 hours and the firm collects for 800 of them, realization is 80 percent. Measuring it shows where time leaks, but compare practice areas carefully.

If your firm bills hourly, run a work in progress report today and look at the oldest entries first. Then decide who owns it every month. You can browse bookkeepers on Sam's List, including the firm above, and ask each how it handles unbilled time.

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About the author: Kimberly Green is the cofounder of Sam's List, where business owners and high earners find vetted CPAs, financial advisors, and fractional CFOs. She's met one-on-one with 400+ financial professionals and writes from the real data behind thousands of client-advisor matches. Ask her anything about finding an accountant - she's heard it all, including the questions people are afraid to ask.