Most personal injury demands get acknowledged within about two weeks, draw a substantive response within several weeks, and resolve anywhere from a few weeks to several months later. Clear liability, completed treatment, and a complete package sit at the fast end. Disputed liability, ongoing treatment, and missing documentation push a case to the slow end, and sometimes into litigation.
For a firm, the question lands two ways. Clients ask it constantly, and you need an answer that sets expectations without promising a date. You also need to know which parts of the timeline you control, because most of the delay after a demand letter goes out traces back to decisions made before it did.
This guide covers the phases, the two clocks that start when you send, what actually slows things down, and how to answer your client honestly.
Whether you’re scaling a PI practice, adding workers’ comp, or looking to standardize legal documents without adding overhead, this session highlights how firms are combining AI and process discipline to drive efficiency and consistency.
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The period after a demand breaks into three phases. Each has its own typical length, and each stalls for its own reasons.
| Phase | What Happens | Typical Length |
|---|---|---|
| Acknowledgment | The carrier confirms receipt and assigns or confirms the adjuster | Days to about two weeks, and regulated in most states |
| Evaluation | The adjuster reviews liability, medical records, and damages, and may request more information | Several weeks, usually measured against the deadline in your demand |
| Negotiation and resolution | Offer and counteroffer rounds, then agreement, release, and payment, or a decision to file | Weeks to months, depending on how far apart the positions start |
Evaluation is where the variation sits, and it’s also where you have the most influence. An adjuster working from a complete file evaluates faster than one requesting records, questioning gaps, or waiting on information that should have been in the package.
Two separate timelines begin when a demand goes out, and firms that track only one of them tend to lose control of the pace.
The insurer’s regulatory clock. Most states have adopted some version of the NAIC’s unfair claims settlement practices standards, which set minimum expectations for claim handling. Under the model regulation, an insurer acknowledges a claim within 15 days, and if the investigation is still open, sends written notice of the reasons at 45 days and every 45 days after that. States modify these, so the timeframes run roughly 15 to 45 days depending where you are. California’s regulations are among the most detailed, requiring acknowledgment within 15 calendar days and acceptance or denial within 40 days of proof of claim.
Your demand’s deadline. Most demands state a response deadline, commonly 15 to 30 days. That date is yours to set and yours to enforce. It carries no regulatory force by itself, but it defines the point where you decide what happens next.
Knowing both matters because a carrier that hasn’t acknowledged a claim within the state’s standard, or has gone quiet past a required status update, is out of step with how the claim should be handled. That’s worth documenting.
[LEGAL REVIEW: NAIC Model 900 and Model 902 verified against primary NAIC sources, and California’s 10 CCR 2695 timeframes against secondary sources quoting the regulation. These are regulatory claim-handling standards enforced by state insurance departments. Application to third-party claimants varies by state, and the model regulation states it creates no private cause of action. Confirm the characterization before publish.]
Five factors account for most delay, and they split cleanly between what you control and what you don’t.
A package assembled at the end. The most common controllable cause, and the one worth the most attention. More on it below.
Treatment that isn’t finished. A demand sent before your client reaches maximum medical improvement invites the carrier to wait for the clinical picture to settle, and it can’t easily be revised upward once sent. An unexplained gap in the treatment record does similar damage, giving the adjuster a reason to question severity that a clean record wouldn’t have needed.
Disputed liability. When fault is contested, the carrier investigates more thoroughly, which adds weeks and usually additional rounds.
Policy limits and multiple claimants. Cases near or above available coverage, or with several claimants sharing one policy, move differently. A policy limits situation can resolve fast when exposure is obvious, or slowly when the carrier is weighing several claims against a single limit.
Carrier volume. Large carriers handle high claim volumes, and a demand that arrives without urgency can sit. This is the one factor you influence through follow-up discipline rather than through the file.
In most firms, the demand is a project someone starts at the end of pre-litigation. You pull the police report, request the records, chase the missing bills, build the summary, run the numbers, draft the letter, and assemble the exhibits, all at once and all under deadline.
That’s when gaps get found. And by then, a treatment gap from four months ago can’t be closed, and a missing bill has already held up the file. Firms are missing five documents for every ten cases on average, and each gap can cost roughly $3,000 in settlement value.
When the demand lives inside an AI-native platform, every component builds as the case runs instead. The medical summary assembles itself as records arrive, with every entry linked to its source through MedChrons. Bills get matched to the records supporting them, and treatment costs total against policy limits through Case Preparation. Communication Agents check in with clients through treatment and capture the ongoing complaints that substantiate non-economic damages.
That changes what “ready to send” means. When the pieces are already built, readiness becomes a state the system detects rather than a task someone has to notice. The demand goes out complete, and the evaluation phase gets shorter because the adjuster has nothing left to request.
Most of what you control was decided before the demand went out. What’s left afterward is follow-through.
These are workflow tasks, and they fail silently when they depend on memory. Proactive Workflows trigger tasks at each case stage so response dates and follow-ups get tracked by the system.
The results show up in cycle time. Sand Law’s average case resolution fell from four to six months to three to eight weeks, C&B Law Group cut demand delays by 30 to 45 days, and Malman Law saw a 90% decrease in missing document errors.
Clients ask “how long?” because they want a date, and a date is the one thing you shouldn’t give. What works is explaining the phases and updating them as each one passes.
That last point is where most client frustration comes from. The delay itself is rarely the complaint. The silence around it is.
Litigation is the lever when negotiation has stopped producing movement. Three signals usually indicate it’s time:
That last one deserves emphasis. Sending a demand letter doesn’t pause the statute of limitations. The filing deadline keeps running throughout negotiation, so track it alongside the demand deadline and preserve the option to file.
Filing also changes the timeline itself, typically extending resolution considerably, which is why the decision belongs to your strategy for the specific case rather than to frustration with a slow carrier.
The honest answer to “how long after a demand letter?” is that it depends, and most of what it depends on is visible before you send. A complete package, a treatment record without unexplained gaps, and a firm that tracks its own deadlines will move cases faster than any tactic applied afterward.
The demand amount and the decision to settle stay with your firm. What shortens the wait is giving the carrier less to question and fewer reasons to set the file aside.
Schedule a call to see how EvenUp helps firms move demands to resolution faster.
Most demands get acknowledged within about two weeks and draw a substantive response within several weeks. Resolution runs from a few weeks for clear-liability claims with complete documentation to several months when liability is disputed, treatment is ongoing, or the package is missing records. Cases that move into litigation take considerably longer.
Two timelines apply. Most states have adopted versions of NAIC model standards requiring insurers to acknowledge a claim promptly, commonly within 15 days, with written status updates when an investigation runs long. Separately, most demands set their own response deadline, commonly 15 to 30 days. Requirements vary by state, so confirm the rule in your jurisdiction.
The most common controllable cause is a package assembled as a batch at the end of pre-litigation, which is when missing bills, absent provider records, and unexplained treatment gaps get discovered too late to fix. Other factors include ongoing treatment, disputed liability, policy limits constraints, and high carrier volume.
No. The filing deadline keeps running throughout negotiation. Track it alongside the demand’s response deadline and preserve the option to file suit if you don’t reach resolution in time.
Send a complete package with every bill, record, and explanation already attached, calendar the response deadline the moment you send, follow up on a set schedule, and decide the next step before the deadline arrives. Most delay traces back to the file, so the fastest settlements usually come from the most complete demands.
