The Cost of Hiring a Legal Assistant vs AI Agents
A working monthly cost model for solo and small injury firms weighing the next hire against an ops layer.
The cost of hiring a legal assistant for a small personal-injury firm runs $3,000 to $4,000 a month for part-time help that works business hours and needs managing. AI agents priced per completed unit of work carry a comparable operational load for well under that in a typical small-firm month, and they answer the 9pm call from a car-accident lead. What follows is a working cost model: one realistic month walked through both columns, plus an honest look at what a person still does better.
Nimbus Marlowe is the AI operations layer for personal-injury law firms, starting with intake. It sits in front of the practice-management system you already run, every rate is flat and published, and a licensed attorney at your firm reviews and adopts everything the agents produce. That supervision chain matters to the math, so keep it in view as the numbers stack up.
What does hiring actually cost a small firm?
The listing says part-time intake specialist or legal assistant, and the invoice says $3,000 to $4,000 a month. The invoice is the floor. Recruiting takes weeks before day one. Training eats the first couple of months, and somebody has to manage the person after that. In a firm of one to three attorneys, that somebody is you.
The bigger cost hides in the schedule. A part-time hire covers 20 to 25 hours a week, all of them inside business hours. The car-accident lead who calls at 9pm on a Saturday gets voicemail, and on contingency, that voicemail can be the whole fee. Annualized, you are paying $36,000 to $48,000 for coverage that ends at 5pm.
Turnover resets the whole cycle. When a trained assistant leaves in April, the firm goes back to voicemail while the search restarts, and the training investment walks out the door with her.
What do AI agents cost per unit of work?
Nimbus publishes every rate and bills per completed unit of work. There are no seats and no quote calls.
- •Qualified intake, around $18. The intake coordinator answers every call 24/7 by voice, qualifies the lead against your firm's criteria, and books the consult.
- •Contract review, $65. The contract analyst reads the agreement and flags the terms that matter.
- •Case preparation, $95. The agent assembles what your team needs to move the matter.
- •Demand letter draft, $170. A complete draft built from the file, ready for attorney review.
- •Collections follow-up, also flat per-unit, so post-resolution outreach stays on schedule instead of quietly slipping.
The CRM underneath all of it is free. Contacts, matters, documents, and the client portal cost $0 and are never invoiced. Pay-as-you-go carries no minimum, so a slow month costs a slow month's worth of units. Firms with steady volume can take Committed pricing instead: discounted per-unit rates with a $500 monthly minimum, applied as a simple true-up line item when usage falls short. The minimum is a floor on the invoice, with no prepaid balance behind it. Text messaging adds a $49 one-time setup and $5 a month for a dedicated number where applicable.
What does a realistic month look like in both columns?
Take a two-attorney auto-accident practice in Texas with one paralegal and steady sign-ups. Suppose a normal month brings 25 qualified intakes, 6 contracts to review, 8 matters needing case preparation, and 4 demand letters to draft.
Column one is the part-time hire at $3,000 to $4,000, the same invoice whatever the month held. One person also cannot draft four demand letters and review six contracts on top of covering the phone, so part of that work stays on the attorneys' desks anyway.
Column two is the agents at pay-as-you-go rates:
- •25 qualified intakes at about $18 each, roughly $450
- •6 contract reviews at $65, $390
- •8 case preparations at $95, $760
- •4 demand letter drafts at $170, $680
The month totals about $2,280, with every after-hours call answered live. The same volume on Committed rates comes in lower. A quiet month, say 10 intakes and 2 demand drafts, runs about $520 on pay-as-you-go. The hire's invoice does not shrink in a quiet month.
Where does the break-even sit?
At around $18 per qualified intake, the low end of a part-time salary buys more than 160 qualified intakes in a month. A solo or two-attorney firm does not see that call volume. Even doubling every unit in the model above lands at about $4,560, roughly the top of the range for a single part-time hire who still could not have answered the overnight calls.
The break-even question is simple to run for your own firm. Add up a typical month of intakes, contract reviews, case preparations, and demand drafts at the published rates. If the total sits under $3,000 to $4,000, the per-unit column wins on price before you count the after-hours coverage.
What does a hire still do better?
An honest cost model gives the hire a fair column too. A good legal assistant reads a client's mood in the lobby and adjusts. When a scared client calls on a hard day, a familiar voice carries weight. Institutional memory, the kind where someone remembers this client switched doctors in March, lives in people. Judgment inside ambiguity belongs with a person.
There is also a growth argument. Over two years, a sharp assistant becomes a paralegal who can run a desk, and that kind of compounding has no per-unit price. If your caseload and cash flow support a salary, and you have the time to train and manage well, hiring stays a sound investment. The real question is what the next $3,000 a month should buy first.
Do you have to choose?
Most firms that run this math end up hybrid. The agents take the volume work. Overnight calls get answered and qualified while the office sleeps. Demand letters stop sitting half-drafted, because a complete draft lands on the attorney's desk instead of a blank page. Your paralegal gets back the hours the phone used to eat and spends them on the work that needs a person.
Every unit runs under attorney supervision, and the supervision chain works as a feature of the model. Each intake call lands in the CRM with a transcript the attorney can read. Every draft is reviewed and adopted by a licensed attorney before it moves. The agents do not give legal advice or assess the merits of a claim; that work stays with your attorneys, along with final say on every document.
One more line matters to a contingency practice. No Nimbus fee is ever a percentage of a recovery. Rates stay identical whatever a case resolves for, and Nimbus never holds or transmits client funds.
Frequently asked questions
How much does a part-time legal assistant cost a small law firm?
Plan on $3,000 to $4,000 a month in most markets, before recruiting and training time. That budget buys business-hours coverage, so evening and weekend calls still reach voicemail.
Does Nimbus take a percentage of settlements?
Never. Every rate is flat and published, the invoice reads the same whatever a case resolves for, and Nimbus never holds or transmits client funds.
Who reviews the AI agents' work?
A licensed attorney at your firm. Every intake call produces a transcript in the CRM, and every document arrives as a draft the attorney reviews and adopts. The agents handle operations while your attorneys practice law.
Is there a monthly minimum?
Pay-as-you-go has no minimum, and the CRM is free. Committed pricing trades a $500 monthly minimum for discounted per-unit rates, settled as a simple true-up line item when usage falls short. The minimum works as a billing floor; there is no prepaid balance to track or lose.
Run your own month through both columns before you post the job listing. Sign up now and start free, since the CRM costs $0 and is never invoiced. Or book a call and we will walk the numbers against your actual caseload.
Put your firm's operations on autopilot. Reviewed by you.
Nimbus Marlowe is the AI operations layer for personal-injury firms. The CRM is free, pricing is flat and per-unit, and every output is a draft your attorneys review and adopt.