Renting a Car in Greece: Excess, Deposit and the Local-Agency Trap on the Islands

Every car rental in Greece legally includes third-party liability insurance, which covers damage caused to others but never damage to the rental car itself. Almost every rental also bundles in a basic damage waiver — the CDW (Collision Damage Waiver) — which doesn't remove your financial liability after a scrape but caps it at an amount called the excess.

This base contract also carries exclusions that rarely surface before you sign: windscreen, tyres, wheels and the underbody are very often left out of the standard CDW, even though these are exactly the parts most likely to take a hit on a mountain track or a gravel island road. Theft, for its part, usually requires a separate option.

Regardless of the insurance you choose, every rental company blocks a deposit on the main driver's international credit card — a debit card is refused or heavily restricted at almost every agency. Expect somewhere between €500 and €2,000 blocked depending on the vehicle category; the sum isn't charged, but it does eat into your card's available limit for the whole trip.

The excess itself — what you're actually on the hook for after damage — most often sits between €700 and €2,500 for a city car or compact SUV rented with basic insurance. That's the figure rarely highlighted in the eye-catching daily rate on comparison sites, and it's worth asking for explicitly before booking.

It's the scenario travellers coming back from Crete, Rhodes or the Cyclades describe most often: a local agency refuses the independent insurance bought online before departure, on the grounds that it's merely a private contract between the traveller and the booking website, then demands a deposit well above average — sometimes €1,000 to €1,500. A few days after drop-off, an email arrives with a photo of a scratch or a damaged wheel trim never mentioned at pickup, along with a charge already applied to the card.

A study by Ding Xu, Laurie Murphy and Tingzhen Chen, published in 2024 in the Journal of Travel Research, tested with 609 participants what drives tourists to comply with this kind of claim rather than contest it. The results show that it isn't the features of the scam itself that matter most, but traits of the traveller — sensation-seeking, limited travel experience and risk perception — that best predict the likelihood of paying without arguing (study available via Google Scholar: scholar.google.com/scholar?q=Xu+Murphy+Chen+Falling+for+Tourist+Scams+Examination+Scam+Compliance+Factors). In other words, the best defence isn't guessing who will be dishonest, but gathering the evidence that makes any later dispute pointless.

The habit that solves most of the problem takes five minutes at the counter: film a continuous, time-stamped video of the bodywork, wheels, windscreen, roof and interior, then have every existing mark noted directly on the paper contract signed by the agent — a single photo on your phone carries far less weight than a handwritten note countersigned on the spot. Choosing an agency with recent, verifiable reviews rather than the lowest fare on a comparison site avoids most of these disputes from the moment you book.

For a driver from France or any other EU country, a national licence held for at least a year is enough, with no international permit required. Non-EU travellers — including the UK since Brexit, the US, Canada and Australia — must instead present an International Driving Permit (IDP) alongside their national licence; it's cheap and quick to obtain at home, and it removes any argument in the event of a check or an accident.

The most common age threshold among rental companies is 21, with a licence held for a year, and an almost universal young-driver surcharge below 25. That surcharge is added on top of the quoted price and is worth asking about at the quote stage rather than discovering at the counter.

Driving is on the right, but a local convention often surprises visitors: on single-lane national roads, slower vehicles straddle the hard shoulder to let following traffic pass — refusing this unwritten rule annoys everyone, and it isn't dangerous once you understand it. Motorway tolls exist on the mainland's main routes (expect around €25 for Athens–Kalambaka) and are paid in cash or by card at the barriers.

For the islands, two options compete: taking your rental car onto the ferry (roughly €90 to €130 one-way for Piraeus–Naxos, passengers excluded) or dropping the car off on the mainland and renting a fresh one directly on the destination island — often simpler, and not necessarily pricier over a stay of more than a week. Either way, watch out: many rental companies contractually forbid loading their vehicle onto a ferry without prior written authorisation, a clause worth checking before improvising an island-hop mid-trip.

A study by Andreas Psarras, Theodore Panagiotidis and Andreas Andronikidis, published in 2024 in the journal Current Issues in Tourism, analysed road-accident data across 51 Greek regions between 2000 and 2017. It finds that foreign tourists, most of whom drive a rental car, face a higher risk of severe and fatal accidents than residents, particularly in less touristic regions where local road users are less likely to expect drivers unfamiliar with the network (study available via Google Scholar: scholar.google.com/scholar?q=Psarras+Panagiotidis+Andronikidis+role+tourism+road+traffic+accidents+Greece). One more reason to drive cautiously off the busiest routes, notably in the mountain villages of the Zagori or on the small coastal roads of the Mani.

The "Greece Self-Drive" guide devotes a full section to car rental: a comparison of major brands and reliable local agencies by region, excess ranges by vehicle category, and the correct procedure for a legal island-hop. Enough to reach the counter already knowing the excess to negotiate rather than discovering it on the contract.