It depends on which insurance company you are asking, and that distinction is the source of most of the confusion and frustration people experience in the first forty-eight hours after a car accident. There are two insurers potentially involved in your rental car situation — the at-fault driver’s liability insurer and your own insurer — and they have completely different obligations, different response timelines, and different practical relationships with you. Understanding which one you are dealing with and what each one actually owes you is the first step toward getting a car in your driveway as fast as possible.

Your own insurer, if your policy includes rental reimbursement coverage, is almost always the faster path to a rental car. Rental reimbursement is an optional coverage that you purchase as an add-on to your auto policy. If you have it, your own insurer can authorize a rental car typically within one to two business days of your claim being filed, sometimes faster. They are not waiting for a liability determination. They are not investigating fault. They have a contractual obligation to you under your own policy, and they can fulfill it quickly because the only question is whether you have the coverage and whether your vehicle is in the shop or otherwise unavailable. The rental authorization goes directly to the rental agency — Enterprise, Hertz, whatever network your insurer works with — and you show up, present your insurance information, and drive away. You may have a daily rate cap and a total duration limit built into your policy, so check what those limits are when you call, but the process itself is straightforward and fast.

The at-fault driver’s liability insurer is a different situation entirely and a slower one. That insurer has no direct contractual relationship with you. They did not sell you a policy. They owe you what their insured owes you under the law — which includes the loss of use of your vehicle while it is being repaired or replaced — but before they will authorize anything they need to complete at least a preliminary liability investigation. In a clear-fault case where their insured received a citation, where there is video footage, or where the circumstances are unambiguous, that preliminary investigation can sometimes be completed within a day or two and a rental authorization can follow quickly. In a disputed liability case, or in a case where the insurer simply takes their time, you may wait a week or more for the at-fault insurer to authorize a rental, and they may refuse to authorize one at all if they are contesting whether their driver was responsible.

This is why, if you have rental reimbursement coverage on your own policy, using it first rather than waiting on the at-fault insurer is almost always the right move. The practical objection most people raise is that they do not want to go through their own insurance for an accident that was not their fault. That concern is understandable but largely misplaced. Filing a claim with your own insurer for a covered loss does not automatically raise your rates if you were not at fault. Your insurer will pursue subrogation against the at-fault driver’s insurer to recover what they paid, including your deductible if they collect it. The process runs in the background without your involvement. What you get in exchange for routing the claim through your own insurer is a rental car in the next day or two instead of the next week or longer. For most people who need their car to get to work, that trade is worth making without hesitation.

The practical mechanics of getting a rental authorized matter more than most people realize because small missteps add days to the process. When you call your insurer to report the accident and initiate the rental claim, ask specifically and in the same call for the rental authorization. Do not assume it will be initiated automatically or that a separate call is needed. Ask the claims representative to note in your file that you need a rental immediately and to send the authorization to your preferred rental location. Get the name and direct number of your adjuster before you hang up. If the authorization has not arrived at the rental agency within twenty-four hours, call the adjuster directly — not the general claims line — and ask for the authorization number. Rental agencies cannot give you a car without it, and they will not follow up with the insurer on your behalf. That follow-up is yours to do.

If you are pursuing the rental through the at-fault driver’s insurer, call them the same day as the accident if at all possible. Give them the claim number, your contact information, and the police report number if you have it. Ask specifically about rental authorization and what their timeline is for making a liability determination. Get the adjuster’s direct contact information and call again the next morning if you have not heard back. The at-fault insurer has no incentive to move quickly on your rental unless you are actively creating a record of having asked for it promptly and repeatedly. That record matters if your rental authorization is delayed unreasonably, because the insurer’s obligation to cover your loss of use includes prompt response, and documented requests that go unanswered become part of a claims handling pattern that can support a complaint to your state’s insurance regulatory agency.

Here is the piece of rental car coverage that genuinely surprises people and that almost no one explains before the situation arises: if the at-fault driver’s insurer disputes liability or delays authorization and you are forced to rent a vehicle out of pocket while the dispute resolves, you are entitled to recover those out-of-pocket rental costs as part of your damages once liability is established. Every day of rental you pay for personally, with a receipt, is a documented economic loss attributable to the accident. Keep every receipt. Keep records of every call you made requesting rental authorization and every date that request went unfulfilled. That documentation turns your out-of-pocket rental costs into a recoverable item in your claim rather than a personal loss you absorb silently. People who do not know this often decline to rent a car they need because they assume they will never get reimbursed for it. Some of them miss weeks of work as a result. The rental cost is recoverable. Rent the car, keep the receipts, and let your attorney include it in your demand.

Rental reimbursement policies have daily rate limits and total day limits that vary significantly and that most people do not fully understand until they are already in a rental. A policy with a thirty-dollar-per-day limit and a thirty-day maximum sounds generous until you discover that a standard midsize rental in your market costs fifty-five dollars a day and your repair is taking six weeks. The gap between what your policy covers and what the rental actually costs is your responsibility unless you can get the at-fault insurer to pick up the difference. Understanding your policy’s specific limits before you select a vehicle and commit to a rental period gives you the information you need to either find a vehicle within your coverage limit, negotiate with the rental agency, or make an informed decision about absorbing some cost personally while documenting the excess as a recoverable item in your claim.

The duration of rental coverage is tied to the status of your vehicle, and this is where the total loss timeline intersects with your rental situation in a way that produces some of the most acute frustration in the entire claims process. If your vehicle is being repaired, your rental coverage runs until the repair is complete. If your vehicle has been declared a total loss, your rental coverage does not run indefinitely while you negotiate the settlement value. Most insurers — both yours and the at-fault driver’s — will authorize rental coverage for a defined period after the total loss determination, typically a few days to a couple of weeks, to give you time to arrange replacement transportation. After that cutoff, the rental is your expense. Knowing when that cutoff is, and managing your total loss negotiation with that clock in mind, can save you hundreds of dollars in out-of-pocket rental costs that you were never going to recover.

One situation that catches people off guard is the accident involving an uninsured or underinsured driver. If the person who hit you has no insurance, your rental car options depend on what your own policy includes. Uninsured motorist property damage coverage — UMPD — is available in some states and covers property damage caused by an uninsured driver up to your policy’s limit. In Missouri, uninsured motorist coverage is required but applies primarily to bodily injury rather than property damage, and UMPD is a separate optional coverage. If you have collision coverage, you can use it to repair your vehicle regardless of the other driver’s insurance status, and rental reimbursement under your own policy runs alongside it. If you have neither collision nor UMPD, your options against an uninsured driver are limited to what you can recover directly from them, which is often practically nothing in the short term. This is the scenario where knowing what your own policy includes before an accident happens matters most, but if you are already in it, your attorney can help identify whether any other coverage sources apply to your situation.

The short answer to the question you came here with is that your own insurer, if you have rental reimbursement coverage, can get you into a car within one to two days. The at-fault driver’s insurer may take longer, may dispute your entitlement, and may require follow-up before they move. The fastest path to a rental car in the immediate aftermath of an accident is almost always your own coverage, filed immediately, with a direct and specific request for authorization in the same call. Everything else — the subrogation, the reimbursement, the coordination between insurers — happens after you already have the car, and it happens without you needing to manage it.

This article is for general informational purposes only and does not constitute legal advice. Rental reimbursement coverage terms, uninsured motorist coverage requirements, subrogation rights, and loss-of-use obligations vary significantly by state and by the specific terms of your insurance policy. If you are having difficulty obtaining rental coverage after a car accident, consult with a licensed personal injury attorney or your state’s insurance regulatory agency.