Most managing partners can tell you their firm’s total billing figure for the year without blinking. Fewer can tell you their fee earner utilisation rate, their average time to bill, or how their WIP has trended over the last six months. Yet these are often the numbers that predict where the firm will be in a year’s time, long before it shows up in annual revenue.
Here are three KPIs worth putting on your radar, and why they matter more than the headline numbers most firms default to.
1. Fee Earner Utilisation Rate
What it is: The proportion of a fee earner’s available time that’s actually being billed to clients.
Why it matters: Revenue targets can hide a lot of inefficiency. A firm can hit its numbers while some fee earners are overloaded and others are underutilised, and nobody notices until burnout or under-performance shows up elsewhere. Utilisation gives you an early, honest signal of workload balance across the firm.
What to watch for: A consistently low utilisation rate in a particular team can point to inefficient processes, unclear case allocation, or capacity that isn’t being used well. A consistently high rate, on the other hand, can be a warning sign for burnout risk rather than something to celebrate outright.
2. WIP to Billed Ratio (and How Long WIP Sits There)
What it is: How much value is sitting in work in progress compared to what’s actually been billed, and how long that WIP takes to convert into an invoice.
Why it matters: Cash flow problems in law firms rarely come from a lack of work. They come from work that’s been done but not yet billed. A growing WIP balance, or WIP that sits for longer than it should before conversion, is one of the clearest early warning signs of a cash flow squeeze months down the line.
What to watch for: Look at this by practice area rather than firm-wide. A single department with WIP quietly building up can distort the overall picture and mask a problem until it’s much harder to fix.
3. Enquiry to Instruction Conversion Rate
What it is: The percentage of new enquiries that actually turn into instructed matters.
Why it matters: Most firms track how many enquiries come in and how much revenue they generate, but the step in between often goes unmeasured. If your conversion rate quietly drops, it means either your intake process has friction, your response times have slipped, or your pricing and positioning aren’t landing the way they used to. Marketing can be doing everything right and driving strong enquiry numbers, but if conversion is falling, growth stalls anyway.
What to watch for: Break this down by referral source and practice area. A dip might be isolated to one type of enquiry rather than the whole firm, which makes it much easier to fix.
Why These Get Missed
None of these numbers are hidden. They all exist somewhere in your Proclaim data. The reason they get missed is usually that firms report on outcomes (revenue, billing totals) rather than the leading indicators that predict those outcomes weeks or months in advance.
By the time a revenue dip shows up on the P&L, the underlying issue, whether it’s workload imbalance, WIP creeping up, or a conversion problem, has often been building quietly for a while.
Making These Numbers Visible
The good news is none of this requires new systems or a big investment. It requires pulling the data that’s already in Proclaim into a dashboard that puts these numbers in front of the right people on a regular basis, rather than leaving them buried in reports nobody has time to build manually.
Firms that keep half an eye on these three numbers tend to catch problems while they’re still small and easy to fix, rather than after they’ve become a much bigger conversation at the partners’ meeting.