What Is a Good Realization Rate for a Law or Accounting Firm?

How to calculate each ratio from the time and billing system

Each ratio comes from a report the billing system already produces. First write the firm’s definitions on one page: a report labeled realization can mean the billing ratio or both ratios combined, and the standard rate can be the published rate or one already reduced for a client. Pick one meaning for each word and keep it.

• Available hours. Start from 2,087, the divisor federal pay law uses to turn a federal employee’s annual salary into an hourly rate (5 U.S.C. 5504(b)); the Office of Personnel Management explains it as the average number of work hours in a calendar year over the 28 years it takes the calendar to repeat. Subtract the holidays and paid time off the firm grants, and prorate for part-time staff.
• Billable hours. Every time entry marked billable, by timekeeper, including entries later written down.
• Standard value. The same entries priced at each timekeeper’s standard rate, as the work-in-progress or pre-bill report shows them.
• Billed amount and adjustments. One row per invoice from the invoice register: the standard value of the time on it, the amount billed, and every adjustment with its reason code and who made it.
• Collected amount. Cash receipts applied to each invoice, plus any credit or write-off posted after it went out.

Compute billing realization per invoice, then roll it up by timekeeper, billing partner, client and type of work, adding billed amounts and standard values separately before dividing, so each write-down stays attached to the matter or engagement where it happened. Compute collection realization only on invoices old enough to have been paid, for example those dated more than 90 days ago, or recent invoices will read as losses. Report the month and the rolling twelve months side by side, because one large write-off or one busy season can swing a single month.

Why a benchmark cannot set your realization rate, and what can

A published realization rate or an average law firm collection rate cannot say what this firm needs, because the answer depends on its own rates, salaries, overhead and profit target. A firm with low rates can bill at full realization and still lose money on a role; a firm with high rates can write down part of every bill and still clear its target.

Illustrative example, continuing the hypothetical senior accountant: the person costs $110,000 a year in salary, payroll taxes and benefits, carries an $80,000 share of overhead, and the partners want 20 percent of collections left as profit. That person’s work must collect $237,500, the $190,000 of cost and overhead divided by 0.8. At 1,200 billable hours, a $250 rate and 95 percent collection, billing realization has to stay above about 83 percent. At 90 percent billing realization and 95 percent collection, utilization has to stay above about 60 percent, roughly 1,111 hours. Those two floors are what a good realization rate and a good utilization rate mean for that role at this firm.

Run the same arithmetic for each role. A partner who spends part of the year bringing in and managing work has fewer hours left to bill and needs a higher rate or higher realization to clear the same floor. If a published figure still comes up in a partner meeting, put three questions to it:

• Who paid for it, and whose data is it? A software vendor reporting on its own customers, or an association reporting on members who answered a survey, describes that group only. Read a vendor-funded figure as vendor-funded.
• How does it define the ratio? Against standard or already-reduced rates; with write-downs before billing only, or credits and write-offs after billing too.
• Which firms are in it? Practice area, size, region and the mix of hourly, fixed and contingent fees each move the result.

Where realization leaks: rate reductions, pre-bill write-downs, credits and write-offs

Two leaks never reach the ratio at all. Time that was never recorded has no standard value, so a firm whose people record only the time they expect to bill reports high realization and low utilization, and the loss is invisible. Time recorded but left unbilled past month-end is not yet a write-down, but it ages toward one; with the days from invoice to payment it makes up lockup, the days between doing the work and holding the cash.

Inside the ratio, the gap opens at four points, each with its own owner and fix. Give every adjustment a reason code when it is made; without one, the monthly number shows how big the leak is and nothing about why.

• Rate reductions agreed at engagement. The client was promised less than the standard rate, in the engagement letter or on a call. It is a pricing decision made before the work, so track it on its own line, where it cannot hide among write-downs.
• Write-downs at the pre-bill. The billing partner cuts time from the draft bill: work past the estimate, a junior learning on the client’s file, work outside the agreed scope, entries a client’s billing guidelines will reject. One person makes this cut at month-end, and without a reason code nobody else sees why.
• Credits after billing. The client disputed an invoice and the firm issued a credit memo or a reduced replacement. Record the reason and who approved it.
• Write-offs and unpaid balances. The invoice stood and was not paid in full. This belongs to collection realization and the receivables aging.

Courtesy pricing is a fair choice when it is made on purpose. Writing in the Journal of Accountancy in January 2025, Amanda Aguillard, CPA, and Anita Dennis accept that firms may give a break to certain clients, and say they should “define and limit the number of clients this will apply to.” In records terms, that is a named list of courtesy clients, each with an approver and a date to revisit. For a law firm, how a reduction or write-off is presented to the client is also a professional-conduct question for the firm’s ethics counsel. Not legal advice.

How fixed-fee firms measure realization without timesheets

A firm that prices by the engagement and keeps no timesheets has no standard value to divide by, so realization changes shape. The same Journal of Accountancy article argues that tax services be priced by complexity and value rather than by time, and the measures follow that logic: compare what was billed and collected with what the engagement letter priced.

• Fee realization: the amount billed divided by the fee in the signed engagement letter for the same period. Credits, reduced invoices and waived extras show up here.
• Collection realization: unchanged, collected divided by billed.
• Scope realization: the fee divided by the units the engagement letter priced — returns, entities, states, months of books — against the fee divided by the units delivered. A flat fee on growing units is a write-down nobody recorded.
• Capacity in place of utilization: units delivered per person per month, from the practice-management system, against the same person’s count last season.

Illustrative example: a hypothetical client on a $12,000 annual fixed fee receives a $1,500 credit after a dispute over a late close, and $600 of the rest is never paid. Fee realization is 87.5 percent and collection realization about 94.3 percent. If the same client went from one entity to three with no change in fee, the fee per entity fell by two-thirds, and only the scope count shows it. A firm that records some time can add realization against standard value; on a fixed fee it can run above 100 percent, which is what pricing by value aims for.

What a partner should review each month

One page, prepared by the billing manager or firm administrator on a fixed day early in the month, read by the managing partner in half an hour, with each decision written beside the line that prompted it:

• Billing realization by billing partner, client and type of work, for the month and the rolling twelve months, against each role’s floor.
• The ten largest write-downs, each with its reason code and the name of the person who approved it.
• Clients on agreed rate reductions or courtesy pricing, each with an approver and a revisit date. A reduction not on the list is a leak, not a courtesy.
• Unbilled time older than 30, 60 and 90 days, by matter or engagement, with one owner per line.
• Collection realization on invoices old enough to have been paid, credits and write-offs after billing, the receivables aging and days to collect.
• Utilization by person against that person’s floor, over twelve months, so a slow month is not mistaken for a slow year.
• For fixed-fee work, every engagement whose delivered units passed the units its letter priced.

Illustrative example: one month’s page at a hypothetical firm shows $18,000 of pre-bill write-downs: $9,000 coded over estimate, $5,000 outside the agreed scope and $4,000 partner courtesy. The first points at estimating and staffing, the second at how change requests get priced, the third at a pricing decision the partners can now make on purpose. Between reviews, one weekly rule does the heavy lifting: no draft bill leaves pre-bill review with a write-down that has no reason code.

When this needs no outside help, and where the Review fits

If the system already reports the three ratios per invoice, write-downs carry reason codes, and a partner reads the page above every month, nobody needs to be hired. If the reports exist but the definitions shift from month to month, fixing the definitions costs nothing and comes first.

The Revenue Review covers this under the Delivery → Invoice hand-off. From a read-only export of time, billing and receipts records, with client IDs in place of names and no matter files, returns or workpapers, it computes the three ratios per invoice, sorts write-downs by who made them and, where a reason was recorded, by reason, ages unbilled time, and puts a dollar figure on each gap the records support. It takes two weeks and ends in a written report the firm keeps. It sets no rates; pricing stays with the partners.

Lumina gives no legal, tax or ethics advice. The next step is a free 20-minute call, and for a firm below about $1 million a year in fees, it is where we say plainly that the Review’s price does not fit the arithmetic.