A pre-authorization is a verification step that confirms you have the funds or insurance coverage to pay for something before the transaction or service actually happens. The term shows up in two common situations: credit card holds placed by hotels, car rental companies, and other merchants, and medical pre-authorizations required by health insurance companies before they’ll agree to cover a procedure or medication. The mechanics differ, but the core idea is the same. Someone wants to confirm you can pay before they deliver.
How Credit Card Pre-Authorizations Work
When you check into a hotel or pick up a rental car, the merchant doesn’t charge your card right away. Instead, they send a request to your card issuer asking to place a temporary hold on a specific dollar amount. Your card issuer checks that you have enough available credit (or enough money in your checking account, if you’re using a debit card), then approves the hold. That amount is set aside and subtracted from your available balance, but it hasn’t actually been charged yet.
The hold exists to protect the merchant. A hotel needs to know you can cover the room rate plus any incidental charges like minibar purchases or room damage. A car rental company needs assurance you can cover the rental period and potential fees. The pre-authorized amount typically reflects the estimated maximum you might owe, which is why it often looks higher than your expected bill. Once you check out or return the car, the merchant submits the actual charge. The hold drops off and is replaced by the final amount.
Most holds last between five and seven days, though they can extend up to 30 days for longer hotel stays or extended car rentals. If the merchant never submits a final charge, the hold eventually expires and your full balance becomes available again. During the hold period, though, that money is effectively locked up. This matters most for debit card users, since a hold on a debit card ties up real cash in your checking account rather than just reducing a credit limit. If you’re traveling, using a credit card for pre-authorizations gives you more financial breathing room.
Where You’ll Encounter Financial Holds
Hotels and rental cars are the most common, but pre-authorizations also appear at gas stations, restaurants, and any business where the final charge isn’t known at the time of the initial swipe. Gas stations often pre-authorize a set amount (sometimes $100 or more) when you insert your card at the pump, then adjust to the actual fuel cost once you finish. Restaurants may pre-authorize the bill amount before tip, then process a higher total after you sign.
You’ll see the hold show up as a “pending” transaction in your online banking or credit card app. It won’t appear on your statement as a completed charge. If you notice a pending amount that seems too high, it’s usually the pre-authorization, not an error. Give it a few business days after the transaction finalizes, and the hold should clear. If it doesn’t drop off after a week or so, call your card issuer to ask them to release it.
How Medical Pre-Authorizations Work
In healthcare, a pre-authorization (also called prior authorization) is your insurance company’s way of deciding whether they’ll cover a treatment, procedure, or medication before you receive it. Your doctor’s office handles most of the process. They submit a request to your insurer that includes your diagnosis, the proposed treatment, and documentation explaining why it’s medically necessary. The insurer reviews the request and either approves it, denies it, or asks for more information.
Not every medical service requires pre-authorization. Routine office visits, basic lab work, and emergency care typically don’t. But many insurers require it for surgeries, advanced imaging like MRIs and CT scans, specialty medications, hospital admissions, and out-of-network care. Your insurance plan’s documents or website will list which services need prior approval. If you skip the pre-authorization step for a service that requires one, your insurer can refuse to pay the claim entirely, leaving you responsible for the full cost.
The Medical Pre-Authorization Timeline
Response times vary by insurer and by the urgency of your situation. For standard requests, many insurers take several days to a couple of weeks. For urgent cases where a delay could seriously harm your health, insurers are generally required to respond faster. Marketplace plan issuers, for example, must respond to expedited requests within 24 hours and standard requests within 72 hours under current federal rules for drug-related authorizations.
Once approved, a pre-authorization is valid for a limited window, often 60 to 90 days depending on the insurer and the type of service. If your procedure gets delayed beyond that window, you or your doctor’s office may need to submit a new request. Approvals can also come with conditions, such as requiring you to try a less expensive medication first (called step therapy) before the insurer will cover the one your doctor originally prescribed.
The process can be frustrating. Your doctor’s office may spend significant time on paperwork and phone calls with the insurance company, and you may experience delays in getting the care you need. If your doctor’s office tells you they’re “waiting on authorization,” that means the request has been submitted but the insurer hasn’t responded yet.
What To Do If Your Pre-Authorization Is Denied
A denial doesn’t have to be the final answer. Your insurer is required to tell you why they denied the request, and you have the right to challenge the decision through a formal appeals process.
The first step is an internal appeal, where you ask the insurance company itself to take another look. Your doctor can submit additional medical records or a letter explaining why the treatment is necessary. If the situation is urgent, the insurer must expedite this review. Many denials get overturned at this stage, especially when the initial request lacked sufficient documentation.
If the internal appeal fails, you have the right to an external review. This sends your case to an independent third party who is not employed by the insurance company. The external reviewer examines your medical records and the insurer’s reasoning, then makes a binding decision. If the external reviewer sides with you, the insurer must cover the service. This is a powerful protection, because it takes the final decision out of the insurance company’s hands entirely.
Throughout this process, keep copies of every document: the original pre-authorization request, the denial letter, any correspondence with the insurer, and your doctor’s supporting notes. Having a clear paper trail strengthens your case and speeds up the review.
How To Check Your Pre-Authorization Status
For credit card holds, open your banking app or log into your credit card account online. Pending pre-authorizations appear in your recent activity, usually labeled “pending” or “processing.” If a hold seems stuck, your card issuer’s customer service line can confirm whether the merchant has released it.
For medical pre-authorizations, your insurance company’s member portal or app is the best place to check. Many insurers let you track the status of pending requests online. You can also call the member services number on the back of your insurance card. Your doctor’s office can check on their end too, since they submitted the request and receive the approval or denial directly.
If you’re scheduling a procedure that requires pre-authorization, ask your doctor’s office to submit the request as early as possible. Starting the process two to three weeks before your planned treatment date gives enough buffer for back-and-forth with the insurer and reduces the chance of a last-minute delay or cancellation.