How to Write a Car Accident Demand Letter (What to Include, Step by Step)

Key takeaways

• Send the demand letter after you've finished treatment (reached maximum medical improvement), so it reflects your full costs.
• The core sections are: the facts, liability, injuries and treatment, itemized damages, and a specific dollar demand.
• Attach your evidence: the police report, medical records and bills, wage-loss documentation, and photos.
• Set a specific but reasonable response deadline (often two to four weeks), and keep copies of everything.
• Your first demand is a starting anchor — set it above your real target to leave room to negotiate down.

What a Demand Letter Is (and When to Send It)

A demand letter is the document that formally opens settlement negotiations. In it, you spell out the accident, explain why the other party is responsible, describe your injuries and losses, and ask for a specific amount of compensation. It usually goes to the at-fault driver's insurer; for a claim under your own collision or uninsured-motorist coverage, it goes to your own insurer.

Timing matters. The best practice is to send the letter only after you have finished treatment or reached maximum medical improvement — the point where your doctors can describe your recovery and any lasting effects. Sending it too early risks leaving out future treatment and undercounting what your claim is really worth.

What to Include: Section by Section

An effective demand letter generally moves through these parts in order:

1. Header and introduction — the date, the parties involved, the insurer's claim number, and the date, time, and location of the accident.
2. The facts — a clear, chronological account of what happened. Write it as if the reader knows nothing about the crash, and stick to facts rather than emotion.
3. Liability — why the other driver is at fault, supported by the police report, witness statements, traffic laws, and any citations.
4. Injuries and treatment — the injuries you suffered, the treatment you received, any ongoing care, and the lasting effects on your daily life.
5. Damages — an itemized list of your losses (more below).
6. The demand — the specific dollar amount you are requesting.
7. Deadline and enclosures — a reasonable response deadline and a list of the documents you've attached.

A Simple Structure You Can Follow

You don't need legal language — clarity wins. A workable skeleton looks like this:

• Opening: "I am writing regarding claim #_____ arising from the collision on [date] at [location]."
• Facts: a short paragraph describing how the crash happened.
• Liability: a paragraph explaining why the insured driver is responsible, citing the police report and any witnesses.
• Injuries: a paragraph on your injuries, treatment, and recovery.
• Damages: a clearly itemized list with subtotals.
• Demand: "Based on the above, I am requesting [amount] to resolve this claim."
• Close: "Please respond within [time]. Enclosed are the following documents: …"

Print it cleanly, send it by certified mail with return receipt so you can prove the date it arrived, and keep a copy of the letter and everything you attach.

How to Calculate Your Demand

Start with your economic damages — the losses with receipts: medical bills, lost wages, and vehicle or property damage. Add them up and show the math. Then account for non-economic damages such as pain and suffering, which are real but subjective; a brief, honest description of how the injuries affected your work and daily life carries more weight than a big round number. For more on how claim value is estimated, see our guide on how much a car accident settlement is worth.

Finally, set your opening demand above your real target. The first number is an anchor, and the insurer will almost certainly counter lower — so leaving negotiating room is normal and expected, not dishonest.

Mistakes That Get a Demand Letter Ignored

A few errors weaken otherwise strong claims: sending the letter before treatment is finished; writing emotionally or making threats instead of stating facts; failing to attach documentation; admitting or implying fault anywhere in the letter; giving a vague demand (or no specific number at all); omitting a response deadline; and not keeping copies of what you send.

After You Send It

The insurer will review your letter and usually respond with a lower counteroffer — that is the start of negotiation, not a rejection. Respond in writing, hold your documented position, and don't accept a first offer that doesn't reflect your losses. Our guides on responding to a lowball offer and negotiating a settlement cover the back-and-forth. For serious injuries, disputed fault, or large claims, an attorney often drafts the demand letter and handles the negotiation.

The Bottom Line

A demand letter is your chance to present the whole claim — facts, fault, injuries, and a specific number — in one organized, documented package. Wait until you know your full costs, keep it factual, attach your evidence, and treat the opening figure as a starting point in a negotiation you should expect to continue.