Hiring a car abroad should be straightforward, but the rental industry has developed a talent for making simple transactions complicated. Excess charges, insurance gaps, fuel policy disputes and deposit holds can turn an otherwise pleasant hire into a source of genuine financial stress. Here is what to understand before you sign anything at the rental desk.
The insurance alphabet: CDW, SLI, TP and excess
Rental car insurance terminology varies by company and country, but the same concepts appear under different names:
- CDW (Collision Damage Waiver): Reduces your liability if the car is damaged. The word "waiver" is important — it is not insurance in the traditional sense, but a waiver of the rental company's right to charge you for damage, subject to conditions. Almost every CDW comes with an excess (the amount you remain liable for even with CDW, typically €300–€1,500 depending on the company and car category).
- TP (Theft Protection): Reduces liability if the car is stolen. Again, usually subject to an excess and conditions about where the car was parked and whether it was locked.
- SLI (Supplementary Liability Insurance): Increases the third-party liability cover beyond the legal minimum. Worth considering in countries where medical and legal costs can be high.
- PAI (Personal Accident Insurance): Covers you and passengers for injury. Often duplicated by your own travel insurance — check before paying extra for it.
The excess trap and how to avoid it
The excess is the amount the rental company can charge to your card if the car is returned with damage, even with CDW in place. For a minor parking dent, a chipped bumper or a cracked wing mirror, this can run to several hundred euros — charged to your card immediately, with a dispute process that is slow and often unresolved in your favour.
There are two main ways to reduce this exposure:
- Excess waiver / full cover upgrade: The rental company sells an upgrade that reduces the excess to zero. It is expensive (often more per day than the base rental), but simple.
- Third-party excess insurance: Specialist insurers (Insurance4carhire, Questor, Mondial, and others) sell annual or single-trip excess waiver policies at a fraction of the daily rental desk rate. You pay the excess to the rental company if damage occurs, then reclaim it from the insurer. The process adds a step, but the savings over a two-week hire can be substantial.
The credit card deposit
Nearly all rental companies require a credit card (not a debit card, in most cases) to hold a deposit — typically the vehicle's full value or a large portion of it. This sum is blocked on your card at pickup, meaning it counts against your credit limit but is not charged unless damage occurs. The block is usually released within a few days to a few weeks after the car is returned undamaged, which can be an unwelcome surprise if your credit limit is modest.
Check what the deposit amount will be before you book. For a mid-size car it may be €1,000–€2,000; for a prestige or high-specification vehicle it can be far more. Companies vary on whether they accept debit cards (usually at a higher deposit or not at all), prepaid travel cards (often refused) or multiple cards for a split deposit (rare).
Fuel policy: which to choose
There are four common fuel policies, and getting this wrong is an easy way to pay over the odds:
- Full-to-full: You collect the car full and return it full. This is almost always the best option — you only pay for what you use at local pump prices. Allow time to fill up near the return point.
- Full-to-empty (or "prepaid fuel"): You pay for a full tank upfront at the company's rate (often above pump price) and return the car as empty as you like. Only worthwhile if you will genuinely use every drop — which almost never happens.
- Same-to-same: Return the car at the same level you collected it. Take a photo of the fuel gauge at pickup.
- Empty-to-empty: Less common; you pay for fuel as needed but the company may charge a fuelling surcharge on return if any fuel was added.
Whatever the policy, photograph the fuel gauge at collection and return. Disputes about fuel level are among the most common rental arguments.
The car inspection: do it properly
Before driving away, walk around the car slowly with the rental agent or alone, and note every existing scratch, dent, chip and scuff on the inspection form — even those that seem too minor to matter. Take dated, timestamped photographs or video of all four sides, the roof, the underbody if you can see it, and the interior (especially the upholstery and any existing stains). Do the same on return.
Return the car during staffed hours if at all possible. Night-drop boxes are convenient but mean you cannot dispute a new damage claim on the spot.
Additional drivers, age surcharges and vehicle restrictions
- Additional drivers must usually be added at the time of rental and will be charged a daily fee. An unregistered driver who has an accident may not be covered — check the policy carefully.
- Young driver surcharges apply in most countries for drivers under 25 (and sometimes under 21). The surcharge can add significantly to the daily rate. Some companies will not hire to drivers under 21 at all.
- Vehicle category restrictions: Some sports cars, prestige vehicles and specialist vehicles (e.g. vans, 4x4s) have age or experience minimums beyond the standard. Check before booking.
- Cross-border rules: See the dedicated cross-border car rental guide for the detail on taking a hire car into another country.
Booking: direct vs broker vs comparison site
Booking directly with the rental company gives a direct relationship for disputes. Booking through a broker or comparison site (Auto Europe, Rentalcars, Holiday Autos, Kayak) can produce lower headline rates but adds a layer between you and resolution if things go wrong. Either way, read the T&Cs of the actual rental contract, not just the comparison site summary — the fine print about one-way fees, fuel policy and what is or is not covered varies significantly.
If you are planning to drop the car in a different city or country, factor in the one-way fee before comparing prices — see the one-way car rental guide.
Frequently asked questions
Can I use a debit card to rent a car in Europe?
Some companies accept debit cards, usually with additional conditions: a higher deposit, a credit check, or restrictions to specific car categories. Many major companies still insist on a credit card for the deposit. Check the policy of your specific rental company when booking, not just the general policy, as it varies by location.
What happens if I have an accident in a rental car abroad?
Call the rental company's emergency number (in the glove box or rental paperwork) immediately. Do not admit liability at the scene. Take photos, get the other driver's details and insurance, and obtain a police report if damage or injury is involved. File the claim with the rental company; the insurer (yours or the rental company's) then handles the rest.
Is it cheaper to book airport or city-centre pick-up?
City-centre rental locations are often cheaper than airport desks because airport operations carry a concession fee that is passed on to the customer. If you can get into town by public transport and pick up there, you may save a meaningful amount — especially on longer rentals. Compare both when booking.
Do I need an international driving permit to rent a car in Europe?
EU, EEA and UK licence holders generally do not need an IDP to rent in Europe, though rental companies may ask for one if your licence is in a non-Roman-alphabet script. Outside the EU, requirements vary. The full detail is in the international driving permit guide.
Sources and further reading:
- Consumer rights on car hire: European Commission (consumer rights in the EU).
- Excess insurance providers: check Independent comparison sites for annual vs single-trip cover.
- Rental industry terms: BVRLA (British Vehicle Rental and Leasing Association) guidance.
- Cross-border rental rules: Taking a rental across borders on Viamo.