A hold and a charge are not the same thing
In a hold, the amount is reserved against the card limit without leaving the account. The money remains yours, but you cannot use it while the hold lasts. In a charge, the amount is genuinely taken and has to be refunded afterwards.
With a credit card a hold is normal; with a debit card, where accepted, a real charge often occurs instead. That difference decides whether the money is merely locked during the trip or plainly absent from the account.
What determines the amount
The figure depends mainly on the vehicle category and the cover chosen. A large or upper-range car generally carries a higher deposit, and an offer with a high excess tends to require more security than one with a reduced excess.
The amount appears in the terms of the offer, not in the advertised price. It is worth reading before booking, because it decides whether your card is sufficient far more than the daily rate shown in a comparison does.
Available limit matters more than balance
For the hold it is not the money you have that counts, but the headroom still free on the card at that moment. A card used heavily during the month can run short of headroom even when the account is in good order.
As an illustration: with an assumed monthly limit of £1,500, earlier spending of £1,000 and a deposit of £700, the authorisation fails for lack of headroom. Checking the available limit before departure, and asking the issuer for a temporary increase if needed, solves the problem in advance.
Amounts that stack on top of the deposit
Alongside the security, other items may be held: prepaid fuel under certain fuel policies, cover bought at the counter, or extras such as a second driver. All of it consumes the same card headroom.
It is therefore unwise to budget to the penny. Leaving a buffer above the expected deposit covers these items and also exchange differences if the rental is invoiced in another currency.
Currency and conversion
If the rental is invoiced in a currency other than your own, the held amount is converted at the rate of the moment. The figure blocked may not match the one shown in the offer exactly, and the release may return a slightly different sum.
If the card terminal offers to charge you in your own currency, that conversion is applied by the terminal provider rather than by your bank. Always compare the two options before accepting instead of deciding in a hurry.
Release runs on two clocks, not one
When you return the car the company cancels the hold, but that message takes time to reach the card issuer and to show on the statement. The hold can therefore stay visible for days after the company has already released it.
It is worth separating those two timings before complaining: one belongs to the company, the other to the bank. If the amount is still held after a reasonable period, the starting point is your return receipt.
Document the return so you can dispute
Always ask for a return receipt showing date, time, mileage and fuel level, and keep it until you see the deposit released on your statement. Without that document it is hard to prove the condition in which you left the car.
Add photographs or a short video of the exterior, the interior and the dashboard. If a damage charge appears later, that material is the concrete basis of your dispute.
If an amount is withheld after the return
When something is deducted from the deposit, ask in writing for a breakdown of the item and the amount. A general note does not let you check whether the charge matches what the contract provides for.
Compare that breakdown with your return receipt and your photographs, then dispute in writing with the company, quoting the contract number. Orderly documentation turns a verbal argument into a case with evidence.
The deposit belongs in the comparison
Two offers with a similar daily rate can differ widely in the deposit required, and that figure decides whether the booking works in practice. A cheap offer with security your card cannot carry is of no use at all.
The planned comparison intends to show the deposit next to the price and the excess from the end of 2026. Until then the value has to be looked up in the terms of each offer and noted while comparing.
Checklist
- Read the deposit amount in the terms before booking
- Distinguish a hold from a real charge
- Check the available limit on the card, not only the balance
- Leave headroom for fuel, cover and extras
- Ask the issuer for a temporary increase if the headroom is tight
- Allow for exchange differences if invoicing is in another currency
- Compare the conversion offered by the terminal before accepting it
- Insist on a receipt with date, time, mileage and fuel level
- Photograph the exterior, the interior and the dashboard
- Keep the receipts until the deposit shows as released
- Ask in writing for a breakdown of any amount withheld
Frequently asked questions
How large is a car rental deposit usually?
There is no general figure: it depends on the vehicle category, the cover chosen and each company’s terms. The applicable amount appears in the terms of the specific offer, which is worth reading before booking.
Is the deposit actually charged?
With a credit card it is normally a hold against the available limit, with no money leaving the account. With a debit card, where accepted, the amount may genuinely be charged and refunded after the return. The difference should be checked before travelling.
Why does the authorisation fail when I have enough money?
Because what counts is the free headroom on the card, not the account balance. Spending already made in the period reduces that headroom. Checking the available limit before departure, and raising it if needed, prevents the refusal.
How long does it take for a deposit to be released?
Two timings apply: the company cancelling the hold and the bank recording it. That is why the hold can remain visible on the statement for some time after the return.
Which document should I ask for at the return?
A return receipt showing date, time, mileage and fuel level. Keep it until you see the deposit released, because it is the evidence of the condition in which you handed the car back.
What should I do if an amount is deducted from the deposit?
Ask in writing for a breakdown of the item and the amount and compare it with your return receipt and photographs. If it does not match what was agreed, dispute it in writing quoting the contract number.
Does the contract currency affect the deposit?
Yes. With invoicing in another currency the amount is converted at the rate of the moment, so the sum held and the sum returned can differ slightly from the figure advertised. A small buffer is sensible for that reason.
Can someone else put down the deposit for me?
As a rule no, unless that person is registered as the main driver on the contract. Many terms require cardholder and main driver to coincide, so it is a decision to make before booking.