Almost every rental desk at Keflavík takes a security hold on a credit card before it hands over the keys. It is not a charge, but it does eat into your available limit until the car is back and your bank has caught up. The size depends on the car, the operator, and how much cover you have bought. Here is what to expect before you fly.
At Keflavík the deposit is almost always a pre-authorisation, not a payment. You hand over a credit card, the terminal reserves an amount against your limit, and nothing leaves your account. Return the car on time, undamaged and with the agreed fuel level, and the reservation is released.
That distinction matters twice over. A held amount still blocks your spending power for the rest of the trip, awkward if the same card is paying for hotels and dinner. And because the hold is usually placed in Icelandic krónur, the figure your banking app shows at home can drift between the day it goes on and the day it comes off. That drift is an exchange-rate artefact, not a charge.
Some operators — usually when you are not using a standard credit card — take a real charge instead and refund it after return. A refund takes far longer to reappear than a released authorisation, so ask which applies when you book, not at the counter.
The deposit is normally built from the insurance excess on your contract, sometimes with a margin for fuel and admin. A car carrying a large excess will not be released against a token hold; the two numbers move together, and bigger vehicles carry bigger excesses.
No published figure will still be right when you book: deposits are set per operator, per vehicle and per cover level, and the only version that binds anyone is the one printed in your own booking terms. What stays stable is the ranking below, which is enough to plan a card limit around.
| Vehicle | Where its deposit usually sits |
|---|---|
| Small 2WD hatchback | Lowest in the fleet, tracking the smallest excess |
| Estate or 2WD crossover | A step up from the hatchback |
| Compact 4x4 | Mid-range, higher again with F-road permission |
| Large 4x4 | Usually the highest of the standard cars |
| Campervan or 9-seater | High, and often quoted on its own scale |
Two things push the number to the top of its band: high summer, when fleets are fully committed, and vehicles rented with F-road permission, where the potential repair bill is larger. The highland roads only open from mid-June into early July depending on the route and the thaw, so that premium bites in the weeks everyone wants. If you are booking a 4x4 for the highlands, assume the upper end.
The safe answer is a physical credit card in the name of the person signing as main driver: accepted everywhere. Everything else varies by operator, so read the terms, not the summary page.
Also tell your bank you are travelling. A large krónur authorisation from an unfamiliar foreign merchant is exactly the pattern fraud systems block, and a declined terminal at night is a bad time to phone your issuer — worth thinking about if you have booked a late-night pickup.
Buying the operator's own top-tier package is the standard way to shrink the hold. Reduce the excess and the deposit usually falls with it; where a genuine zero-excess product exists, the hold often drops to a nominal amount for fuel and fines, though it is rarely removed altogether.
Third-party excess insurance bought from your own provider works differently: it generally changes nothing at the counter. The desk still places the full hold, still charges you for damage, and you claim the money back afterwards with the invoice and photographs. A reasonable saving, but only if you can carry the full excess in the meantime.
Iceland's two local add-ons — gravel protection and sand-and-ash cover — matter for the same reason: they are the damage types you are most likely to meet here, and they narrow the range of things that turn a released hold into a real charge. River crossings sit outside Icelandic rental cover entirely — fording a river is not insured by any product on the counter, so nothing protects your deposit if you drive into water. Our insurance guide covers each product.
Winter tyres are required on Icelandic roads roughly from November to April, and rental fleets sit under the same rule, so they come fitted rather than as an extra you post a deposit against — see the winter tyre rules.
Work this out at home, not at the desk. Take the hold your operator quotes in krónur, convert it roughly, and compare it with the credit you will have on arrival — not the total limit, but what is left once the flights and the hotel have cleared.
If the hold cannot be placed, the desk will not release the car, and a prepaid booking is not necessarily refunded. It is a common way to end up making the 50 km trip up Route 41 to Reykjavík by bus, with no vehicle and a rate already paid.
Once the car is checked in, the release is usually requested the same day or the next working day. How fast it clears is your bank's business, not the rental company's: a few days is common, a couple of weeks is not unusual, and some issuers let the authorisation expire rather than reversing it. If nothing has moved after about three weeks, contact your card issuer first and the operator second.
Charges that can appear after you have flown home are a short, predictable list: missing fuel refilled at the operator's rate, cleaning after a heavily soiled interior, late return, the tolled tunnel in north Iceland if you used it and did not settle online, and traffic fines with an administration fee. Damage found after departure is the difficult one, which is why the photographs you take at pickup and drop-off are worth the five minutes. Our pickup checks and return guide cover what to photograph.
Sometimes. Acceptance varies by operator, and where debit is allowed the deposit is often larger or taken as a real charge refunded later. Confirm in writing with the company before booking; never assume from a generic "cards accepted" line.
Usually in Icelandic krónur, the currency of the contract, though a few operators price in euros. If the terminal offers to convert to your home currency, decline — dynamic currency conversion normally costs more than letting your bank convert. Any difference between hold and release is exchange-rate movement, not a fee.
It usually shrinks it a lot but rarely to zero; operators tend to keep a smaller hold for fuel, cleaning and fines. Excess insurance bought from a third party generally does not reduce the hold at all — you still pay first and claim it back.
Normally not. Desks expect the card to be in the main driver's name, matching the licence and the agreement. Swapping the main driver on the booking before arrival is often possible; swapping cards at the counter usually is not.
You do not get the car, and a prepaid rate is often non-refundable. Carry a second credit card in your own name and check your available credit, not your total limit, before you fly.