How law firms can turn time saved by AI into business value
Time released from a recurring task gives a firm room to do something else. Revenue depends on what happens next: suitable work must be available, the right people must do it, and the firm must bill and collect under its agreement with the client.
Record the staff effort that remains after automation. Then follow any additional client work through its time records, approved invoices and receipts.
Count the review work first
Suppose a firm's lawyers prepare 120 internal matter-status packets in a month. Each takes 30 minutes before a change in the process. Afterwards, each accepted packet needs 12 minutes of review and an average of 3 minutes of corrections and other remaining handling.
These volumes, times, costs and outcomes are fictional teaching inputs. They are not industry benchmarks, a SubAI client result or a forecast. The hours in this example belong to the lawyers preparing the packets. If support staff do the work in your firm, assess their available capacity separately.
| Monthly work | Calculation | Lawyer hours |
|---|---|---|
| Before the change | 120 packets × 30 minutes ÷ 60 | 60 |
| Review and remaining handling afterwards | 120 packets × (12 + 3) minutes ÷ 60 | 30 |
| Estimated capacity released | 60 hours minus 30 hours | 30 |
The example assumes all 120 packets were accepted as usable. Failed, duplicate or unreviewed packets would need separate treatment. Keep the time spent finding errors, correcting them and handling exceptions in the comparison.
If the agreed fully loaded staff cost were $80 an hour, those 30 hours would have a labor-capacity value of $2,400. That is a way to value the time released. It does not mean $2,400 returned to the bank account.
In this example payroll stays the same, so there is no payroll reduction. A confirmed reduction in overtime, a documented hire avoided or another actual spending change would need its own evidence.
The manual-work baseline and calculator help estimate current work cost. They do not establish how much time an automation will release or how much additional revenue the firm will collect.
Follow the additional work to the payment
Now suppose those lawyers use 6 of the released hours for additional client work. The other 24 hours do not generate additional client fees in this example.
Use a fictional hourly rate of $300 for those 6 hours. The resulting $1,800 is the calculated value of work actually performed.
| Stage in this fictional example | Amount | Supporting record the firm would need |
|---|---|---|
| Additional client work performed | 6 hours × $300 = $1,800 | Time records for that work under the client's fee agreement |
| Amount approved for invoicing | $1,500 after a $300 write-down | Approved invoice and the recorded adjustment |
| Cash received by the review date | $1,200 | Payment allocated to that invoice |
| Amount still unpaid | $300 | The open invoice balance |
It shows why a time estimate, an invoice and a receipt should be kept separate.
For hourly billing, the released 30 hours are not hours performed for a client. ABA Formal Opinion 512, published in 2024, discusses billing actual time when using generative AI. The firm's fee agreements and applicable professional rules govern its charges.
Do not add the $2,400 capacity value to the $1,200 received and call the sum a return. The figures describe different stages of this example, and the cost of delivering the additional work also matters.
Identify what prevents the next useful step
A firm might have work available but lack the particular lawyer, reviewer or scheduling capacity it requires. More inquiries may still need an appropriate consultation, engagement approval and someone available to handle the matter.
Review the part of the process where work is waiting. A faster draft will not resolve an unassigned approval. A ready invoice will not establish that a client paid it. Name the next action, its owner and the record that will show completion.
Useful capacity can also go towards serving existing clients, clearing a backlog or giving staff more time for careful review. Record that use directly. A useful operating improvement does not require an invented revenue figure.
Review the result against the same work
Use comparable work, people and periods when reviewing the change. Record shifts in volume, work mix and fee arrangements. A revenue increase on its own does not establish that automation caused it.
Keep a short record of accepted work, remaining staff effort, additional client work performed, approved bills and collections. Where an explanation is uncertain, leave it uncertain. A waiting period between draft and approval is elapsed time; it is not all staff effort.
For the financial review, assess benefits and costs across the agreed engagement. Include the service fee, third-party licenses and remaining operating costs. Keep confirmed spending reductions, the value of staff time released and collected revenue separate.
Bring the recurring task and the follow-on work you want the team to handle. SubAI can explore the process and the measures that would show whether an agreed improvement is useful.