Quick Summary:
- Adding an under-25 driver can raise the pre-authorisation hold amount.
- Some suppliers keep the deposit, but charge a young-driver daily fee.
- Bring a credit card with limit for hold plus extras.
- Declare all drivers at pick-up, or cover may be invalid.
When you collect a car hire in Florida, the amount temporarily held on your credit card is often as important as the rental price. This hold, also called a pre-authorisation, is the supplier’s way of protecting themselves against fuel, tolls, extras, or damage liability depending on the cover you choose. If you add an additional driver who is under 25, it can change the supplier’s view of risk, which in turn can change what they hold on the card.
The key point is that Florida rules are not set by the state for deposits. Instead, each car hire supplier sets its own age policy, young-driver surcharge, and deposit logic. Some suppliers increase the deposit hold when a young driver is added, some keep the deposit the same but charge a daily young-driver fee, and some do both depending on vehicle group or cover selected. Understanding the moving parts helps you arrive with the right card, the right expectations, and a smoother pick-up.
How a credit-card pre-authorisation works for car hire
A pre-authorisation is not a charge. It is a temporary hold that reduces your available credit limit until the rental is closed and the hold is released. The supplier submits a request to your card issuer, the issuer approves a set amount, and your available limit drops by that amount. After return, the supplier finalises any actual charges and releases the remainder. Timing varies by issuer, but it is common for the release to take several days.
In Florida, the hold usually covers at least three elements: a security deposit, an estimated fuel amount if you do not prepay fuel, and sometimes an estimate for toll admin exposure. If you add extras at the counter, such as an additional driver, child seats, roadside packages, or upgraded cover, the supplier may need a larger authorised amount, even if the extra itself is paid as a charge rather than held.
Why under-25 drivers can affect the deposit hold
Most suppliers classify under-25 drivers as higher risk. That risk can show up financially in two ways: a young-driver surcharge (charged per day), and a higher deposit hold (authorised on the card). Adding an under-25 additional driver effectively changes the driver profile for the rental, even if the main driver is older.
1) Higher excess or liability exposure means higher hold. If the supplier’s cover package requires a larger deposit for younger drivers, they may authorise more to align with the maximum potential liability.
2) Vehicle group restrictions can force a change. Some car categories have stricter age rules. If a booking is on the edge of those rules, adding a young driver may push it into a category that requires a larger deposit, or disallows certain vehicles entirely.
3) Card-type acceptance becomes stricter. Even when a supplier accepts debit cards in some cases, under-25 drivers may trigger a credit-card-only rule for the deposit. That can feel like a deposit increase because the required payment method changes and the issuer may place a different hold behaviour.
4) Counter-added drivers can change the authorisation mid-transaction. If you decide to add the under-25 driver at pick-up, the agent may need to re-run the authorisation for a larger amount, rather than simply charging a fee.
Florida pick-up reality: what you should prepare
To avoid surprises, plan for the highest likely pre-authorisation, not the lowest. Your available credit should comfortably cover the hold plus your trip spending. If the issuer declines the authorisation because your available limit is too low, the supplier can refuse to release the car, even if you have already paid for the rental itself.
A credit card in the main driver’s name. Most suppliers require the deposit card to match the main driver. If the under-25 person is only an additional driver, do not assume their card can be used for the hold.
Both drivers’ driving licences. The additional driver must usually be present at pick-up to be added. If they are not present, they may not be allowed to drive.
Passport or ID and matching booking details. Mismatched names, shortened names, or missing middle names can cause delays or refusals.
Proof of age. If the additional driver is close to 25, be ready for exact date-of-birth checks. Age cut-offs are typically strict by day, not by year.
If you are comparing pick-up points, note that policies can vary by supplier and location. Hola Car Rentals provides location pages that help you review options, such as car hire at Orlando MCO and Fort Lauderdale airport rentals.
Will adding an under-25 additional driver always increase the hold?
No. It is common, but not guaranteed. Here are typical outcomes you will see in Florida car hire.
Outcome A: Deposit hold stays the same, surcharge is added. The supplier charges a young-driver daily fee for the additional driver, but the security deposit remains unchanged. Your card is still authorised for the standard deposit, and the surcharge is charged to your rental total.
Outcome B: Deposit hold increases, surcharge is added. The authorisation rises to reflect a higher risk profile or higher liability, and the surcharge also applies per day.
Outcome C: Additional driver under 25 is not permitted. Some suppliers set a minimum age for any driver, not just the main driver, or restrict under-25 drivers from specific vehicle groups. If the under-25 driver cannot be added, letting them drive anyway is risky because it can invalidate cover.
Other factors that influence deposit holds in Florida
Even without a young driver, your deposit hold can change based on choices made at the counter.
Cover selection. Choosing supplier cover that reduces your excess may reduce the deposit hold, because the supplier’s exposure is lower. Declining cover can increase the hold to reflect a larger excess amount.
Fuel policy. If you return the car with the same fuel level, the hold may include a buffer. Prepaid fuel or full-to-full can change what is authorised.
Vehicle category. SUVs and premium groups often require higher deposits. If you are planning a larger vehicle for family travel, compare the likely deposit expectations. For vehicle-type browsing, see SUV hire in Miami.
Location and supplier brand. Different brands and branches apply different deposit logic. If you want to compare branches near business districts or suburban areas, pages like car rental in Doral can help you check which suppliers operate there.
How to minimise surprises at the counter
Confirm the additional driver in advance where possible. If your booking flow allows you to add the under-25 driver before arrival, the pricing and terms are more likely to be clear earlier. Adding at the counter can still be fine, but it can trigger a new authorisation amount on the spot.
Assume the hold is higher than you expect. Plan your credit limit with headroom. A common problem is travellers arriving with a card that covers the rental price but not the deposit plus incidental buffers.
Bring one backup card if you can. If your first card is declined by the issuer’s fraud checks, a backup card in the main driver’s name can save time.
FAQ
Does Florida law set the deposit amount for car hire? No. The deposit hold is set by each supplier’s policy, not by a Florida statewide rule.
If the main driver is over 25, can an under-25 additional driver still raise the hold? Yes. Adding any under-25 driver can change risk rules, which may increase the pre-authorisation even when the main driver is older.
Is the pre-authorisation taken from my bank account? On a credit card it is a temporary hold against your limit, not a charge. On debit cards, if accepted, it can tie up funds more directly.
Can I add the under-25 driver after I leave the branch? Usually no. Additional drivers are normally added at the counter, with licences checked. If they are not on the agreement, they should not drive.
How long does it take for the deposit hold to be released? It depends on the supplier and your card issuer. Many releases appear within a few days, but some can take longer.
