She called eight months after telling me she’d finally hired an associate.
The last time we spoke, the calendar had made the decision for her. DUI and misdemeanor files kept coming in, with enough felony work mixed through the month to wreck whatever schedule she thought she had. The firm was collecting around $430,000. She was handling the legal work, the client calls, and the decisions that arrived five minutes before court.
The associate was billing on schedule. Her monthly production looked steady. Add up the year, and her billings were over double her salary. The invoices said the hire was working, and the owner was working more than she had before the hire.
She wasn’t calling to complain about the associate. She was trying to reconcile two records that seemed to describe different firms. The spreadsheet showed added capacity. Her calendar showed evenings spent reviewing motions, fixing drafts, and returning calls from clients who started with the associate and ended up asking for the lawyer whose name was on the door.
The numbers looked fine. She was tired enough to wonder which one of them was lying.
What the billings mean
The associate’s billings were real. She had opened files, moved cases, appeared in court, drafted motions, and recorded time. Nobody needed to explain those numbers away. The question was what the owner had assumed they meant.
A producing associate can add revenue and consume owner hours on the same file in the same week. The invoice carries the associate’s production. It has no place for the owner’s review, correction, instruction, or the client call that moves upstairs after fifteen minutes.
That omission changes the read.
A hire can produce enough billings to look self-supporting while drawing from the same owner calendar it was hired to release. Salary against billings tests payroll coverage. It doesn’t test whether the owner bought back any capacity. Those are different transactions and the standard report records only one of them.
Walk one file
Take a misdemeanor file from that week.
The associate handles the intake and drafts the first motion. The owner reads it before it goes out. Some drafts need a few comments. One comes back with the argument headed in the wrong direction, so the owner rewrites most of it after dinner. No timer is running. There’s no client bill waiting for that entry, and the practice management system doesn’t interrupt at 9:20 p.m. to ask whether the owner has quietly become the second associate on the file.
Then the client calls. The associate answers the first set of questions. The client asks for the owner when the conversation reaches the plea decision. The owner takes the call because the client hired her firm, the judgment is hers, and handing off work never handed off responsibility.
The professional rules recognize that structure. ABA Model Rule 5.1 requires a lawyer with direct supervisory authority to make reasonable efforts to ensure that another lawyer follows the rules. Its commentary specifically includes systems that ensure inexperienced lawyers receive proper supervision.americanbar+1
Supervision is part of producing the legal work. It still disappears from the production report.
By Friday, the associate has recorded eleven billable hours on the files we traced. The owner has spent four hours reviewing, correcting, instructing, and finishing the work those eleven hours started. The firm reports eleven new hours of production because the four owner hours went missing. They came out of the same calendar the hire was supposed to free.
The missing cost
Every report the firm runs answers some version of the same question: did the associate produce? Hours billed. Fees billed. Collections credited. Payroll paid.
None of those reports was built to answer what that production cost the owner directly. Supervision wasn’t set up as a matter anyone could bill. The time system doesn’t ask for it, so the P&L receives no owner-hour cost to place beside the associate’s output.
Management research treats attention as a scarce organizational resource, not a free input. Research published in Management Science found that a manager’s limited attention capacity affects where that manager can spend time under pressure. Onboarding research has also described new hires as an initial draw on productivity because they consume training time and coworker attention before reaching full production.
Neither study sets a law firm ratio. They support the mechanism sitting in this owner’s calendar. The associate’s output requires another input to produce it, and that input belongs to the owner.
This is how a hire can clear the visible tests and still leave the owner’s economics worse, or how the right hire can run at a supervision ratio the firm never intended. The salary gets placed against the associate’s billings. The comparison comes out favorable because the owner’s hours never reached the other side of the ledger.
The firm hired to buy back owner time. Eight months later, it still hadn’t measured how much owner time the hire used.
Pull one ratio
Pull one month first. The numbers are already in the practice management system, although the owner time may have to come from the calendar and memory.
Owner hours spent supervising per billable hour the associate produces = owner review, correction, client-transition, and meeting time on the associate’s files this month ÷ the associate’s billable hours this month
Use the same definitions next month. Then run it again.
There’s no universal answer for where this number should land. Criminal defense work, experience, matter mix, and the owner’s review obligations all change the ratio. A first-month number also means little on its own. Training is supposed to use time. The direction carries the information.
A ratio that falls across the months describes an associate producing more work for less owner supervision. A ratio that holds steady describes a continuing draw on the owner’s calendar, even while the associate’s billings rise. The guardrail belongs where associate production and owner supervision draw keep moving in opposite directions on the same hour.
That’s the zone to name. It doesn’t decide whether the associate stays, whether another person is hired, or whether the work should be supervised differently. Those decisions belong to the firm and its own numbers.
The ratio supplies the missing owner-hour input. Put it beside the contribution from the associate’s work and the firm can read what the hire adds per hour of owner supervision consumed. Until then, the billings describe production without describing the capacity used to create it.
Half the transaction
A hire’s own numbers can be correct and still describe half the transaction. The other half sits on the owner’s calendar. It doesn’t appear on an invoice because nobody built the invoice to carry it.
The associate may be producing. The payroll may be covered. The owner can still be spending four hours to create eleven that the report assigns to someone else.
If you’ve never measured what a hire costs you in your own hours, the Growth Intelligence Scorecard reads your firm’s revenue structure from the numbers you already carry. About four minutes in your browser, no meeting.
This letter is not legal advice or accounting advice.
The analysis in this letter is produced under Revenue Intelligence & Decision Architecture (RIDA), the proprietary economic discipline B.L. Sheets & Co. runs on and runs for the firms it serves. The doctrine, the case record, and the engagement formats are at blsheets.co.
Sources. ABA Model Rule 5.1 and its comments on supervisory responsibility; research on managerial attention published in Management Science; MIT Sloan Management Review research on the productivity cost and ramp period of new hires. The owner is a composite drawn from engagement work. Figures are rounded and identifying details are withheld under the standing rule. The outside research supports the mechanism. It does not establish a supervision threshold for a one-owner law firm.