More than half of plaintiff firms, 57%, need a week or more to produce a completed demand letter. For the slowest firms it can be as long as a month. The demand letter is the core revenue event of a plaintiff case, so its speed is a direct signal on how efficiently a firm turns work into settled cases.
Here is how long it takes firms to produce one:
- Same day or next day: 14%
- 2 to 5 days: 27%
- 1 to 2 weeks: 32%
- 3 to 4 weeks: 18%
- 1 month or more: 7%
Add up the last three rows and 57% of firms need a week or longer. One in four need two weeks or more.
Where the weeks actually go
It is worth being precise about what those weeks contain, because it is rarely the writing. By the time an attorney sits down to draft, the slow part has already happened. Records have to be gathered from providers on their own timelines. Someone reads through hundreds or thousands of pages and builds a chronology from scratch. Bills get reconciled against treatment. Each step waits on the one before it, and each is done by hand, one case at a time.
Drafting the letter is the last link in that chain, not the long one. This is why speeding up the writing, which is where most firms first point their tools, moves the total timeline so little. The document comes together faster, but the assembly work in front of it stays exactly as slow as it was. A firm can feel busier and more productive without the case actually leaving the desk any sooner.
Capacity is at a breaking point
The delay is not happening in a calm office. It is happening in firms that are already overloaded. 75% of plaintiff firms are at or beyond their operational capacity, and 42% say case volume regularly exceeds what their team can handle.
- Well-staffed: 22%
- Consistent pressure: 33%
- Volume regularly exceeds capacity: 42%
A slow demand letter and a firm at capacity are the same problem seen from two angles. When every case takes weeks to package, and new cases keep arriving, the backlog compounds. Every week a case sits before the demand goes out is a week the settlement clock has not started, and those weeks stack across a portfolio of hundreds of cases at once. Capacity, in other words, is not only about how many people a firm employs. It is about how long each case ties them up before it can move.
Small firms feel the bottleneck first
The pressure lands hardest on the smallest firms. Among solo and small practices of one to two attorneys, 48% need three or more weeks to produce a single demand letter. That is the slowest of any firm size, and it is the group with the least room to absorb the delay.
There is a hard irony in that number. The firms that would gain the most from moving faster are the ones with the fewest hands to spare for the manual assembly work, and often the least time to evaluate new tools carefully. So the bottleneck is most severe exactly where there is the least slack to fix it, which is how a capacity problem hardens into a growth ceiling. A small firm can only take on as many new cases as it can move through the pipeline, and the pipeline is the constraint.
How we measured demand letter speed and firm capacity
Supio partnered with Thirdside Research to survey 207 U.S. personal-injury attorneys and firm leaders on how their practices actually run, including how long demand letters take and how they would describe their capacity for new cases. We fielded the survey between March 11 and 26, 2026, and grounded the findings in outside sources, including Stanford RegLab research, the Charlotin AI Hallucinations Cases Database, court sanctions records, and carrier AI platform documentation.
What a slow demand letter actually costs a firm
A demand letter that takes weeks is rarely a writing problem. It is a data assembly problem, and the cost shows up across an entire caseload rather than on any single file. The 2026 State of AI in Plaintiff Law report quantifies what that delay costs across a portfolio of cases, why applying AI only at the drafting stage leaves the bottleneck intact, and why the firms most starved for capacity are often the ones least equipped to fix it.
Source: Supio, 2026 State of AI in Plaintiff Law: The AI Adoption Gap. Survey of 207 U.S. personal-injury legal professionals conducted by Thirdside Research, March 2026, supplemented by Stanford RegLab research, the Charlotin AI Hallucinations Cases Database, court sanctions records, and carrier AI platform documentation.