What Is a Personal Injury Demand Letter?
Last updated: July 2026
A demand letter is the document that formally kicks off settlement negotiations. It's your (or your attorney's) opening statement to the insurance company: here's what happened, here's why you're responsible, here's what it cost, and here's what we're asking for. Getting it right matters more than most people expect, because a weak demand letter can anchor the entire negotiation at a lower number than the claim deserves.
What a Demand Letter Typically Includes
A clear factual narrative
A straightforward account of what happened, written to establish the other party's fault without unnecessary embellishment. Adjusters read these regularly and tend to trust a clear, factual account more than an overly dramatic one.
The liability argument
An explanation of why the other party is legally responsible — the traffic law they violated, the hazard they failed to fix, the duty of care they breached — supported by any police report, witness statements, or photographic evidence available.
Itemized economic damages
A complete list of medical bills, lost wages, and property damage, each backed by actual documentation — bills, pay stubs, repair estimates. Gaps or vague estimates here are one of the fastest ways to invite a lowball counteroffer, since the insurer will assume you can't fully substantiate what you're asking for.
Pain and suffering narrative
A description of how the injury affected daily life, work, sleep, hobbies, or relationships — not just the medical diagnosis, but its real impact. This is what supports the non-economic portion of your demand (see our explainer on proving pain and suffering).
A specific dollar demand and deadline
Most demand letters ask for a number somewhat higher than what you'd actually accept, anticipating a counteroffer — this is standard negotiation practice, not dishonesty. A reasonable response deadline (commonly two to four weeks) keeps the process moving.
Common Mistakes That Weaken a Demand Letter
Vague or unsupported damage claims, admitting any degree of fault in the narrative (even in passing), demanding an unrealistically inflated number with no documentation to support it, or sending it before treatment has concluded and full costs are known. Each of these gives an adjuster a legitimate reason to counter low or delay.
What Happens After You Send It
The insurer typically takes a few weeks to review the letter and supporting documentation, sometimes requesting additional records or an independent medical exam before responding — often with a counteroffer rather than a final answer, kicking off the negotiation phase described in our guide on settlement timelines.
Should You Write One Yourself?
For a genuinely minor, undisputed claim, some people do write their own. For anything involving significant injury, disputed liability, or a meaningful dollar figure, an attorney-drafted letter tends to carry more weight with insurers and avoids inadvertent language — like an offhand admission of partial fault — that can quietly undercut your position.
Frequently Asked Questions
What is a personal injury demand letter?
A formal written document sent to an insurer laying out the incident, liability, damages, and a specific settlement request — typically opening formal negotiations.
What should be included in a demand letter?
A factual narrative, a liability argument, itemized documented damages, a pain-and-suffering description, and a specific dollar demand with a response deadline.
Should I hire an attorney to write my demand letter?
For minor undisputed claims, some write their own. For significant injury or disputed liability, an attorney-drafted letter tends to be taken more seriously and avoids weakening language.