Law firm profitability calculator
Enter three numbers — attorneys, paralegals and monthly leads — and this calculator shows what your firm leaves on the table each year, where it hides (attorney hours, realization, collections, overhead), and an honest read on whether it is worth a conversation. Benchmarks are pre-filled from Clio Legal Trends 2025 and state salary data; replace any of them with your firm's own figures and every result recalculates live. No sign-up, nothing stored.
The calculator needs JavaScript. What it does: it takes your attorney and paralegal headcount, applies your state's rates and salaries plus Clio 2025 operating averages, and measures the gap between that firm and a well-run one across four levers — attorney billable hours, realization, collections and overhead. A 6-attorney, 4-paralegal firm at industry-average performance typically shows a gap in the high six figures.
What the result means
The headline figure is the annual value sitting between how your firm runs today and how a well-run firm of the same size runs — with no new clients required. It is not new revenue: it is work the firm already does, billed in full, collected on time, and carried by overhead that scales with the firm instead of ahead of it.
The verdict beneath the number compares a cautious share of that gap with the cost of outside help. Worth a conversation means closing even a fraction of the gap pays for the work several times over. Worth a look means the margin is tighter and a call decides it. Not yet means fix the basics first — the free resources on this page are the place to start. The calculator says which basis it is on: industry averages for a firm your size, or the numbers you entered.
Where law firms leak profit: the four levers
Founder-led firms lose profit in four places, and the calculator sizes each one separately: attorney billable hours (utilization), realization, collections and overhead. The first three compound — hours worked × share billed × share collected is what reaches the bank — which is why a firm can be busy and still short of cash.
Attorney billable hours
The 2025 average is 3.0 billable hours in an 8-hour day (38% utilization). Well-run firms reach 4.5. The difference is rarely effort; it is time lost to admin, non-billable work and late time entry. The gap = attorneys × (target − current hours) × 230 working days × rate.
Realization
Of hours worked, the share that reaches an invoice. The 2025 average is 88%; well-run firms hold 95%. Write-downs and write-offs are a billing-discipline problem before they are a pricing problem. Read the realization rate guide.
Collections
Of what is invoiced, the share the client pays. The 2025 average is 93%; well-run firms collect 95%+. Collections is usually the fastest lever to move because the work is already done and the money already earned. Read the collection rate guide.
Overhead
Operating cost excluding fee-earner salaries, as a share of collected revenue. The calculator treats overhead as two-sided — too lean starves the firm, too heavy wastes it — and counts only the variable share above benchmark as recoverable, because rent, systems and deliberate investment do not shrink per attorney.
How the calculator works
The calculator builds a model of your firm from headcount, state rates and salaries, and operating ratios, then re-runs that model at well-run-firm targets and reports the difference lever by lever. Everything it uses is visible in the benchmarks drawer, and every figure can be overridden.
- Billing capacity = attorneys × hourly rate × billable hours per day × 230 working days, plus the same for paralegals.
- Collected revenue = billing capacity × realization rate × collection rate.
- Net margin = collected revenue − fee-earner salaries − overhead (a percentage of collected revenue).
- The gap = the sum of four differences between your firm and the target firm: attorney hours, paralegal hours, realization, collections — plus the variable share of any overhead above benchmark.
- The verdict compares a cautious fraction of the gap with the cost of getting help. It is a fit check, not a forecast, and it says which basis it is on.
Rates and salaries are set by state. Choose your state and click Apply state benchmarks; the calculator refills the rate and salary fields, and you can re-apply any time. Your inputs never leave your browser unless you book a call — then we attach them to the booking so the conversation starts where the calculator leaves off.
Benchmarks used in this calculator (2025)
The pre-filled figures are industry averages from Clio's Legal Trends Report 2025 and public wage data; the targets are what well-run founder-led firms achieve in practice. Every figure below is the default in the calculator until you replace it with your own.
| Metric | Pre-filled average | Well-run firm target | Source |
|---|---|---|---|
| Attorney billable hours per day | 3.0 (38% utilization) | 4.5 | Clio Legal Trends 2025; target from client work |
| Paralegal billable hours per day | 5.2 | 6.5 | Typical practice range; target from client work |
| Realization rate | 88% | 95% | Clio Legal Trends 2025 |
| Collection rate | 93% | 95% | Clio Legal Trends 2025 |
| Overhead (excl. fee-earner salaries) | 20% of collected revenue | Measured against a 30% band; only the variable share above it counts | Typical practice range; PIA method |
| Lead-to-client conversion | 20% | 35% (context only) | Typical intake range |
| Attorney & paralegal rates | Set by state (Tennessee, Georgia, Florida, Texas, the Carolinas, Virginia and others) | State benchmark data | |
| Attorney & paralegal salaries | Set by state | U.S. Bureau of Labor Statistics, state wage data (lawyers 23-1011, paralegals 23-2011) | |
Last reviewed August 2026. Clio publishes the Legal Trends Report each autumn; the pre-filled averages are refreshed when the next edition is out. UK figures — utilisation, realisation, lock-up and overhead from the Law Society's Financial Benchmarking Survey — live on the UK law firm benchmarks page.
Who this calculator is for
Founder-led US law firms of roughly 3 to 25 attorneys, collecting between $500k and $15M a year, billing hourly or on a mix of hourly and flat fees, where the founder is still the operating system. Below that size the answer will usually be “not yet” — and the calculator will say so.
Contingency-only firms: the hours-and-realization levers will not fit your model well; the collections and overhead levers still apply. UK firms: this is the US edition, priced in dollars with US state rates. The UK lock-up calculator and the UK benchmarks page use Law Society data and pounds.
The starting points are not invented
A collection rate in the high seventies is where one founder-led US law firm started when the operating structure went in. It now collects a 92% average, with months reaching 96%, with $603k of revenue recovered so far — and growing. Realization, utilization and overhead moved the same way once the firm had financial visibility, clear decision authority, a leadership rhythm and one accountable owner per number.
What happens if it is worth a conversation
A 45-minute working session on your firm, not a pitch. Your calculator result comes with you into the booking, so the call opens on your numbers — then your real figures if you have them, where you want the firm to be, what is in the way, and where the operating structure is leaking cash. You leave with a clear read and a specific first move, whether or not we work together.
- Before the call: a short note from me with anything worth reading first, so the live time starts at the interesting part.
- On the call: your numbers on screen, a read on the four levers, and one thing you can do this week regardless.
- After the call: a short written summary — your figures, the priorities, and what I would look at first.
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Frequently asked questions
How do you calculate law firm profitability?
Law firm profitability is collected revenue minus the cost of producing it. Collected revenue is billing capacity (attorneys × rate × billable hours) reduced by realization (the share of hours billed) and collection (the share of invoices paid). Subtract fee-earner salaries and overhead and the remainder is net profit; divide by collected revenue for net margin. This calculator does that, then shows what closing each gap to a well-run firm's level is worth.
What is a good realization rate for a law firm?
The 2025 industry average realization rate is 88%, meaning one hour in eight worked is written down or off before it reaches an invoice. Well-run firms hold 95% or better through same-day time recording, billing on a fixed cadence and clear write-off authority. Every point of realization on a $2M billing base is worth roughly $20,000 a year.
What is a good collection rate for a law firm?
The 2025 industry average collection rate is 93%. Well-run firms collect 95% or more, and the difference is almost always structural: a weekly collections cadence, one named owner for receivables and a written escalation ladder. Firms that use evergreen retainers held in trust collect closer to 100% of billed work.
How much revenue is my law firm losing?
Industry estimates put the loss for founder-led firms at 10% to 30% of the value of the time they work, across four leaks: hours never captured, hours worked but written down, invoices never paid, and overhead that grows faster than revenue. Enter your headcount above and the calculator sizes each leak for a firm of your size at industry-average performance; enter your real rates and it sizes them for your firm.
Where do these benchmarks come from?
Operating averages — utilization, realization and collection — are from Clio's Legal Trends Report 2025. Salaries are U.S. Bureau of Labor Statistics state wage data for lawyers and paralegals. Hourly rates are state benchmark figures. The well-run-firm targets are what founder-led firms of this size achieve once the operating structure is in place. All of them are shown in the benchmarks table above and can be overridden in the calculator.
Is anything I enter stored?
No. The calculator runs in your browser and nothing is sent anywhere unless you book a call, in which case your inputs are attached to the booking so the conversation can start from your numbers. There is no email gate and no account.
Do you work with US firms from the UK?
Yes — the firm behind the proof figures on this page is in the US. There is a long overlap in working hours for live sessions, and the analysis and build work happen outside your hours, so live time goes on decisions rather than status updates. The work is operational — cash, capacity, decisions, accountability — not legal or ethics advice.
Is this a coaching program or a software tool?
Neither. The calculator is free and standalone. The work behind it is operational advisory: installing financial visibility, decision authority, a leadership rhythm and accountability design inside the firm, and developing the firm's own people to run them. Whether that is right for your firm is what the 45-minute call is for.
See the number. Then talk it through.
Run the calculator with your headcount, open the benchmarks drawer if you know your real figures, and if the verdict says it is worth a conversation, book the 45-minute Strategy Call — your numbers come with you.
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