Nathan Field
Law firm KPIs are the few numbers that tell you two things: whether your time is turning into cash, and whether your enquiries are turning into signed cases. Most guides give you dozens of them, and most of those are billing numbers. Few explain what to count between the first phone call and a signed fee agreement. For a small firm, that gap is often where the most money leaks out.
This guide covers eight KPIs, each with a formula and a worked example. The first three are the standard money numbers, with the latest averages from Clio. The other five are the growth numbers most page-one guides skip.
The short answer
Track eight law firm KPIs. Three show whether your hours become cash: utilization, realization and collection. Five show whether your marketing becomes cases: new leads by source, speed to first reply, consult rate, signed-case rate and cost per signed case. Check the growth numbers every week and the money numbers every month.
The 8 law firm KPIs at a glance
| KPI | Formula | What it tells you | How often |
|---|---|---|---|
| 1. Utilization rate | Billable hours worked ÷ available hours | Is your time going into billable work? | Monthly |
| 2. Realization rate | Amount billed ÷ value of billable work done | Does that work make it onto an invoice? | Monthly |
| 3. Collection rate | Amount collected ÷ amount billed | Do clients pay what you bill? | Monthly |
| 4. New leads by source | A count of new enquiries, split by where they came from | Is marketing bringing people in, and from where? | Weekly |
| 5. Speed to first reply | Time of first real reply minus time of enquiry | Do people hear back before they try another firm? | Weekly |
| 6. Consult rate | Consults booked ÷ qualified leads | Does intake turn enquiries into meetings? | Weekly |
| 7. Signed-case rate | Signed cases ÷ consults held | Do consults turn into clients? | Monthly |
| 8. Cost per signed case | Spend on one source ÷ cases that source signed | Which sources are worth the money? | Monthly |
You can add more legal KPIs later, once these eight are clean and you trust them.
Money KPIs: is your time turning into cash?
These three come from your billing. If you bill by the hour, your practice management software can probably work them out for you already.
For averages, the best public source is Clio's yearly Legal Trends Report. Clio says it is built on aggregated, anonymized data from tens of thousands of law firms. The figures below are from its 2025 report, the latest on Clio's law firm KPI benchmarks page when we checked on 1 October 2026.
1. Utilization rate
Formula: utilization rate = billable hours worked ÷ available hours × 100.
Example: a lawyer is at work for 160 hours in a month and records 56 billable hours. 56 ÷ 160 = 35%.
Average: Clio puts the 2025 average at 38%. That is 3.0 billable hours in an eight-hour day.
Watch what you divide by. Clio divides by the whole eight-hour day. Some guides divide by a target number of billable hours instead, which gives a much higher percentage for the same work. Neither way is wrong. Just don't hold your number up against a benchmark that divides by something else.
A low rate has a few usual causes. Time goes on admin, on intake calls, on chasing late bills, or there is simply not enough work. Find out which one before you fix anything. More work will not help a lawyer who spends half the day on admin.
2. Realization rate
Formula, in hours: realization rate = hours billed ÷ billable hours worked × 100.
Formula, in dollars: realization rate = amount billed ÷ (billable hours worked × standard hourly rate) × 100.
Clio uses hours. The dollar version also catches discounts and write-downs, so it shows you more. Use it if your software can.
Example: the same lawyer's 56 hours at a $300 standard rate are worth $16,800. After write-downs, the invoices come to $14,700. 14,700 ÷ 16,800 = 87.5%.
Average: Clio's 2025 average is 88%. Of those 3.0 billable hours a day, about 2.6 get invoiced.
Realization drops when time is not entered, when a flat-fee matter grows past what you priced, or when bills get cut before they go out. Look at write-downs by matter type. If one type of matter is always written down, the price is wrong, not the lawyer.
3. Collection rate
Formula: collection rate = amount collected ÷ amount billed × 100.
Example: of the $14,700 billed, clients pay $13,500. 13,500 ÷ 14,700 = 92%.
Average: Clio's 2025 average is 93%. That leaves about 2.4 hours a day turned into cash.
One tip: payments lag behind invoices. If you divide this month's payments by this month's bills, one slow month makes the number jump. Measure a whole month of invoices 60 or 90 days later, or use a rolling 90 days.
To lift it, send bills on time, make paying online easy, and follow up the day a bill is late, not two months later. If you want to change how you take money up front, ask your bar about the rules for retainers and trust accounts first.
On Clio's 2025 averages, an eight-hour day ends up as about 2.4 hours of cash. Every money KPI is a leak somewhere along that line.
Lockup: the money number to add next
Lockup turns money that is stuck into days of work. Clio gives these formulas:
- Realization lockup = (value of work done but not billed ÷ annual revenue) × 365.
- Collection lockup = (value of unpaid invoices ÷ annual revenue) × 365.
- Total lockup = realization lockup + collection lockup.
Clio's 2025 medians are 43 days of realization lockup, 32 days of collection lockup and 93 days in total. Each median is the middle firm on that one measure, which is why the two parts don't add up to the total. Clio's 2025 report also says firms are getting bills out faster while clients are paying more slowly. So if your collection lockup is climbing, you are not alone. It is still your cash.
If you bill flat fees or on contingency
Utilization and realization were built for hourly billing. On flat fees, keep recording time anyway. Divide each fee by the hours it took and you get your real hourly rate per matter type, which shows you what to reprice. On contingency, the money numbers that matter are what each case earns and how long it takes to pay. Either way, the growth KPIs below matter even more, because your income depends on signing the right cases.
Growth KPIs: is your marketing turning into signed cases?
Billing data starts once someone is already a client. Everything before that lives in call logs, inboxes, web forms and somebody's memory. Most KPI guides list a few of these as bullet points with no formula. Here they are as one line, from first contact to signed case:
New lead → qualified lead → consult booked → consult held → signed case.
Each step has a number. The drop between two steps tells you where to look.
Billing numbers tell you about the clients you have. Growth numbers tell you about the ones you are losing.
4. New leads, by source
A lead is a new person who contacts you about a new matter. They might call, fill in a form, start a chat, send a text or email, or come through a referral. Count people, not messages. Someone who calls and then fills in your form is one lead.
Give every lead a source: Google search ads, Local Services Ads, your Google Business Profile, a directory, a lead seller, another lawyer, a past client. Three habits make this work:
- Use a different tracking phone number for each paid source.
- Add a hidden source field to every web form.
- Ask every caller "How did you hear about us?" and write the answer down.
Then carry the source onto the new matter, so it follows the person all the way to a signed case and a paid bill. Without that, KPIs 7 and 8 are guesswork.
Track qualified leads too. Write down what does not count: spam, sales calls, practice areas you don't take, and conflicts. Our guide to law firm lead generation covers where leads come from, and which sources you rent and which you own.
5. Speed to first reply (and answer rate)
Formula: speed to first reply = time of first real reply minus time of enquiry. Track the median, not the average, because one weekend email will drag the average out.
Answer rate = calls answered by a person ÷ calls received during business hours.
What counts as a real reply? An instant text that offers a consult time counts. An auto-reply that only says "we got your message" does not.
Plenty of firms score badly here. In Clio's 2024 study, a research company contacted 500 US law firms as would-be clients. Only 40% answered the phone, down from 56% in 2019. Only 33% replied to emails (2Civility, Illinois Supreme Court Commission on Professionalism).
To be fair, speed is not everything. In Clio's 2025 report, people choosing a lawyer ranked experience, reputation, reviews, free consults and clear information above responsiveness. Fast replies will not sign a case on their own.
Speed will not win the case for you. But you can't sign someone you never spoke to.
If this number is bad, our guides to a law firm answering service and missed call text back cover the fixes.
6. Consult rate (and show rate)
Consult rate = consults booked ÷ qualified leads × 100.
Show rate = consults held ÷ consults booked × 100.
A low consult rate usually means slow replies, no easy way to book, or an intake form that asks too much too soon. A low show rate usually means no reminder, or a consult booked too far ahead. Both are cheap to fix compared with buying more leads.
7. Signed-case rate
Formula: signed-case rate = signed cases ÷ consults held × 100. Some firms call this the conversion rate.
Split it by source and by practice area. A low rate can mean a source is sending matters you don't want, the fee surprised people, or nobody followed up after the consult. It is not always bad, though. Turning down cases that don't fit is part of a lawyer's job. Just make sure you know which reason is behind the number.
Cost per lead tells you what you paid. Cost per signed case tells you what you got.
8. Cost per signed case, by source
Formula: cost per signed case = everything you spent on one source in a period ÷ signed cases from that source in the same period.
"Everything" means ad spend, lead or directory fees, agency or freelancer fees, and the tools for that source. Ad spend alone makes paid sources look cheaper than they are.
Here is a worked example. These are made-up numbers to show the math, not benchmarks:
| Source | Spend | Leads | Consults held | Signed | Cost per lead | Cost per signed case |
|---|---|---|---|---|---|---|
| Search ads | $4,000 | 50 | 16 | 5 | $80 | $800 |
| Legal directory | $1,500 | 30 | 6 | 1 | $50 | $1,500 |
| Emails to past clients | $200 | 10 | 6 | 3 | $20 | $67 |
On cost per lead, the directory beats the ads. On cost per signed case, it costs almost twice as much. That is why cost per lead alone can steer you wrong.
Then add one more number: average fee per signed case = fees earned from a source's cases ÷ the number of those cases. A source with a higher cost per signed case can still win if its cases are bigger. Fees can arrive months after the case signs, so look at three to six months at a time.
A word on ads. If a source is paid advertising, check your state bar's advertising rules before the ad runs, and again whenever you change it. Paying a lead seller has its own rules. The lead generation guide linked above covers the ABA's model rule, and your state's version is the one that counts. We are not lawyers, and this is not legal advice.
How to put law firm KPIs on one page
You don't need new software to start. A shared spreadsheet works. What matters is that the numbers mean the same thing every month.
- Give each number one owner. Your bookkeeper or office manager owns the money KPIs. Whoever runs intake owns the growth KPIs.
- Write your definitions down. What counts as available hours? A qualified lead? Is a case signed when the fee agreement is signed, or when the first payment lands? Pick one and keep it.
- Make the source field required. On every new lead and every new matter. A blank source breaks KPIs 7 and 8.
- Pull the growth numbers weekly, from your call log, forms and CRM. Pull the money numbers monthly, from your practice management software.
- Compare with yourself first. Your own last quarter is a better benchmark than any industry average. Use Clio's averages as a sense check.
- Leave every review with one action. If a number moves and nobody does anything, stop tracking it.
Our older guide on building a marketing dashboard that matters covers the layout side if you want one screen instead of a spreadsheet.
Numbers to stop reporting on their own
Impressions, clicks, keyword rankings and social followers are fine as background. They are not KPIs, because none of them tells you what to do next. Total leads with no source, and billable hours with no realization rate, fall in the same bucket. If a marketing report leads with these and never mentions signed cases, ask for the numbers further down the line.
If a report can't tell you which source signed your last ten cases, it is not a report. It is a scrapbook.
Where Havstock fits, and where it doesn't
We do not run marketing for a law firm today, so this is our method, not a case study.
The growth side is our work. Havstock Unlimited runs ads, practice area pages, intake follow-up by text and email, AI chat on your site that answers questions and books consults, and a CRM that puts a source on every enquiry. Our AI works by chat and text only. It does not answer phone calls. Every month you get a results report, and your firm approves every ad before it runs and checks it against your state's rules. Here is what we do for law firms.
The money side is not our work. Utilization, realization, collection and lockup belong in your practice management software and with your bookkeeper or accountant. They will do that job better than a marketing team.
This will not suit you if you are a solo lawyer signing a few cases a month. At $4,995 USD a month, we cost too much for that. Track two numbers yourself in a spreadsheet instead: collection rate and cost per signed case. They will tell you most of what the other six would.
FAQ
What are the most important KPIs for a law firm?
For most small and mid-size firms, eight cover it. Utilization, realization and collection show whether time becomes cash. New leads by source, speed to first reply, consult rate, signed-case rate and cost per signed case show whether marketing becomes cases. If you only track two, track collection rate and cost per signed case.
What is a good realization rate for a law firm?
Clio's 2025 Legal Trends Report puts the average at 88%, measured as billable hours invoiced out of billable hours worked. Compare your own rate with your last few quarters first. If one type of matter is always written down, look at how you price it before you blame the lawyers working on it.
What is a good utilization rate for a lawyer?
Clio's 2025 average is 38%, or 3.0 billable hours in an eight-hour day. Some guides quote much higher figures. Check what they divide by: Clio uses the full day, while others use target billable hours. Compare like with like, and track your own trend over time.
How do you calculate cost per signed case?
Add up everything you spent on one source in a period: ad spend, lead or directory fees, agency fees and tools. Divide by the cases that source signed in the same period. Spend $4,000 on search ads and sign 5 cases, and your cost per signed case is $800. Compare sources this way, not by cost per lead.
What is lockup in a law firm?
Lockup is the value of work that is done but not yet paid, shown as days of revenue. Realization lockup counts unbilled work. Collection lockup counts unpaid invoices. Clio's 2025 medians are 43 days and 32 days, with a total of 93 days. Lower is better, because it means cash reaches the firm sooner.
How often should a law firm review its KPIs?
Check growth KPIs weekly: new leads, speed to first reply and consults booked. They can go wrong fast, and a slow week costs cases. Review money KPIs monthly, along with signed-case rate and cost per signed case. Look at three to six months of cost per signed case at a time, because fees arrive slowly.
Law firm KPIs only earn their place if someone acts on them. Start this month with two: put a source on every new lead and every new matter, and work out your collection rate. Add the rest one at a time, and in a quarter you will know which sources sign cases and where your cash gets stuck.