Free tool
Rental car and loss-of-use calculator
Count the days you were without your car, compare what you paid with what the insurer covered, and get a letter asking for the difference. Two more modes cover your own rental reimbursement limits and damage bills from a rental company.
When someone else damages your car, the cost of being without it is part of the loss. The other driver's insurer typically pays for a rental or for the "loss of use" of your vehicle while it is being repaired, or until a total-loss claim is paid. Disputes usually come down to two numbers: how many days and how much per day. This calculator puts both in writing.
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1. Dates
2. Rates and payments
3. For the letter (optional)
Rental period to claim
23 days
Amount claimed
$1,196.00
Paid by the insurer
$525.00
Difference to request
$671.00
How the period was counted
- From October 1, 2026 to October 24, 2026: 23 days.
- Waiting before the repair started: 9 days. Time in the shop: 14 days.
- Kept 9 day(s) of delay you did not cause. This is a common point of dispute, so keep emails and call notes that show who was waiting on whom.
- Shortfall from the daily cap: $255.00.
- Shortfall from unpaid days: $416.00.
- Days to claim: 23.
Your demand letter
[Your name] [Your address] [Your phone and email] [Date] [Insurance company] [Adjuster name and address] Re: Rental / loss-of-use claim Claim number: [claim number] Date of accident: October 1, 2026 My vehicle: [year, make, model] Dear Adjuster: I am writing about the rental and loss-of-use portion of my property damage claim. My vehicle could not be driven from October 1, 2026 until the repairs were completed and the vehicle was ready on October 24, 2026. That is 23 day(s). The period includes about 9 day(s) of delay that I did not cause, while I waited for your company to inspect the vehicle, approve the repairs or issue payment. I ask that these days be included. I rented a replacement vehicle at $52.00 per day. Rental receipts are enclosed. Amount claimed: 23 days x $52.00 = $1,196.00 Amount paid to date: $525.00 (15 days at $35.00 per day) Balance requested: $671.00 Your company limited the daily rate to $35.00. Please explain in writing the basis for that limit and whether a comparable vehicle was available in my area at that rate. A vehicle comparable to mine was not available to me for less than $52.00 per day. Please pay the balance or explain in writing, item by item, why any part of it is denied. I ask for a response within 30 days of the date of this letter. This letter concerns rental and loss of use only. It does not settle, release or waive any other part of my claim, including repair costs, diminished value or bodily injury. Enclosures: [repair invoice with dates, rental receipts or comparable quotes, correspondence about delays] Sincerely, [Your name]
By Serdar Arslan, editor · Last reviewed · How we research
What loss of use means
Loss of use is the value of the time you could not use your vehicle because of the crash. If you rented a replacement, the rental receipts are the simplest measure. If you did not rent, the claim is usually valued at what a comparable rental would have cost for the same days. It is a property damage item, so it is claimed against the at-fault driver's property damage liability coverage, alongside repairs and towing.
The general idea is a reasonable period: the time reasonably needed to repair the car, or to pay for it and replace it if it is totaled. What counts as reasonable depends on the facts and on state law, and this page does not apply any one state's rule. Delays you did not cause, such as waiting for the insurer to inspect the car or approve a supplement, are a common argument for a longer period. Delays you caused, such as leaving the car at home for a week before dropping it off, generally are not paid.
How the calculator works
- Mode 1, the other driver's insurer: the period runs from the day the car became undrivable to the day the repair was finished, or to the total-loss payment date plus any replacement days you add. Days of delay you caused are subtracted. The amount claimed is days times your daily rate. The amount paid is the days the insurer paid times its daily cap (or your rate, if it did not cap). The difference is what the letter asks for.
- Mode 2, your own policy: rental reimbursement on your own policy is a contract benefit with a daily limit and usually a per-claim maximum. The calculator shows what you have used, what is left and what you will pay yourself at your current rental rate.
- Mode 3, a rental company's bill: lists the documents to ask for before paying, the coverage that may respond, and a letter requesting the support for each charge.
Assumptions and limits
- Days are calendar days between the dates you enter. Rental companies sometimes count partial days differently, so check your receipts.
- The calculator does not decide fault, coverage or what is reasonable in your state. It organizes your numbers so you can make the argument.
- If you share fault for the crash, the other insurer may pay only part of your loss. See the fault and compensation estimator.
- A 30-day response request in the letter is a courtesy deadline you choose, not a legal one.
Worked example (hypothetical numbers)
A car is hit on October 1 and cannot be driven. The other driver's insurer does not inspect it until October 9, and the shop starts work on October 10 and finishes on October 24. That is 23 days without the car. The owner rents a comparable car at $52 a day. The insurer pays 15 days at its $35 cap.
- Claimed: 23 days × $52 = $1,196
- Paid: 15 days × $35 = $525
- Difference: $671 ($255 from the daily cap on the 15 paid days, and $416 for the 8 unpaid days)
The letter states the dates, notes the nine days spent waiting for the inspection, attaches the rental receipts and asks for the balance or a written explanation. If the insurer still refuses and the amount is modest, small claims court is one option.
Keep these records
- The repair invoice showing the dates the car was dropped off and picked up
- Rental receipts, or two or three written quotes for a comparable car if you did not rent
- Emails and call notes showing when you asked for an inspection, approval or payment, and when it happened
- Your declarations page, if you also have rental reimbursement on your own policy
For the rest of the property claim, see property damage and total loss claims, diminished value claims and the loss-of-use demand letter template. If the insurer has said you were at fault, start with how to dispute a fault decision.
Frequently asked questions
›Does the at-fault driver's insurer have to pay for my rental car?
The other driver's liability coverage generally pays for the property damage their driver caused, and that usually includes a rental or the loss of use of your car for a reasonable time. There is no guarantee they will pay what you ask, and how long counts as reasonable is often the point of dispute. Ask for any refusal in writing.
›Can I claim loss of use if I didn't rent a car?
Often you can ask. The usual way to value it is the daily cost of renting a comparable vehicle in your area for the days you were without your car. Whether and how much an insurer pays without a rental varies by state and by insurer, so keep quotes and a record of the days you had no car.
›The insurer says it only pays $35 a day. Is that the limit?
A daily figure from the other driver's insurer is usually its own position, not a limit in your contract, because you are not their policyholder. If you could not find a comparable car at that rate, send quotes or receipts and ask them to explain the cap in writing. Daily limits on your own policy are different: those are contract terms on your declarations page.
›Why did the rental company charge me loss of use and an admin fee?
Rental companies often bill for lost rental income while a damaged car is out of service, plus an administrative fee for handling the claim. Ask for the repair invoice, fleet utilization records and the agreement terms behind each charge, then check whether your auto policy, a credit card benefit or a damage waiver you bought covers them.
›What happens to the rental when my car is a total loss?
Insurers commonly stop paying rental soon after they make the total-loss payment or offer. If the valuation is disputed or the payment is slow, document the dates, because days you spent waiting on the insurer are a common argument for extending the rental period.