Renting a car abroad: insurance, deposits and pitfalls

The counter is a sales desk. Expect to be offered an upgrade, a bigger car, a GPS unit, a child seat, a full-to-empty fuel option, roadside assistance and the company's own excess waiver. None of these is compulsory, and several are cheaper elsewhere. Decide in advance which ones you actually want, and say no to the rest without debate.

The fuel policy matters more than it looks. Full-to-full means you collect full and return full, and you pay only for what you use. Full-to-empty means you prepay a tank at a marked-up price and hand back whatever is left — you lose the remainder. Where a choice exists, take full-to-full and keep the last fuel receipt.

Mileage is the other quiet cost. Unlimited mileage is standard in many markets but not all; some rates cap you at a daily distance and charge per kilometre beyond it. If your route is long, confirm the cap in writing before you sign. The same applies to one-way drops: returning the car to a different city or country usually carries a fee, and cross-border drops can be refused outright.

Before you drive away, walk the car with a member of staff if you can, and photograph or film every panel, the wheels, the roof, the windscreen and the interior. Note existing damage on the condition report and get a copy. Check the fuel gauge, the odometer and that the spare tyre and tools are present. If the office is closed and you are collecting from a key box, film the whole car in one continuous take before you move it.

There are three separate things people call 'car insurance' at a rental desk, and mixing them up is how travellers end up paying twice or not at all. Which layers are included, and at what limits, is set by the rental contract and by local law — so read the terms for your specific booking rather than assuming a regional pattern.

First, third-party liability. This covers damage or injury you cause to other people and their property. Local law sets a minimum in most countries, but whether that cover comes bundled in your rate and how high the limit is varies by country and company. Supplementary liability insurance (SLI) raises that limit. If you are driving where claims can be large, check the limit in your contract rather than assuming it is generous.

Second, collision damage waiver (CDW) or loss damage waiver (LDW). This is not insurance; it is the rental company agreeing to waive its right to charge you for damage to the car, up to an excess. Whether it is included in the headline rate or sold separately depends on the market and the company. What it excludes is contract-specific: tyres, wheels, glass, roof, underbody, mirrors, interior, keys and towing are commonly listed, and so is damage from driving on unpaved roads or under the influence — but you have to read your own terms to know.

Third, theft protection. This limits what you owe if the car is stolen, and normally requires you to have taken reasonable care — locked, keys with you, nothing valuable on display. Some policies exclude theft if the keys were left in the car or if the vehicle was parked somewhere the terms forbid.

The excess is what remains your responsibility after all of the above. It can be a few hundred or a few thousand in local currency depending on the car class and country, and it is the number that decides whether you need extra cover — confirm the figure in the rental terms. A standalone excess policy bought before you travel usually reimburses you after you pay the rental company, which means you still need the cash or credit available at the time.

The deposit is normally a pre-authorisation: the rental company asks your card issuer to reserve a sum, and it reduces your available credit without leaving your account. The size depends on the car class, the country and the company, and it can be several times the rental price — ask for the amount in writing before you sign. It is released when the car is returned and checked, but the release can take days or weeks to appear, and longer if you crossed a border or returned to a different office.

Two things go wrong. First, the hold is bigger than you expected and blocks spending on the rest of the trip — so keep a card free for the deposit and use another for daily spending. Second, the hold is not released because of a pending damage claim, a missing fuel receipt or an unpaid toll. Keep the return receipt, the fuel receipt and the condition report together, and check your statement after you get home.

Tolls are a common surprise. Some countries use electronic tolls with no booth, and the rental company bills you afterwards plus an administration fee. Ask how tolls are handled before you leave the lot, and whether the car has a transponder. If you drive through a barrier-free toll without one, the fee can arrive months later.

Road rules differ in ways that catch out visitors from North America in particular: roundabouts, priority rules, speed limits in kilometres per hour, and strict drink-driving limits. Local rules on winter tyres, snow chains, low-emission zones and daytime headlights can apply seasonally, and fines for entering a restricted zone are often sent to the rental company, which passes them on with a fee.

Parking is where a lot of damage happens. Kerbed wheels, scraped bumpers and door dents in tight garages are the everyday claims. If the car has a reversing camera, use it; if it does not, get out and look. In cities with congestion charges or permit zones, check whether the rental car is registered before you drive in.

Return the car during opening hours if you can, so a member of staff signs it back in. If you must drop it outside hours, film the car, the fuel gauge, the odometer and the parking spot, and keep the keys' return receipt. Refuel close to the airport and keep the receipt — disputes about the last eighth of a tank are common and the receipt settles them.

Some situations change the whole calculation. If you are renting in one country and dropping in another, the cross-border fee and the insurance terms are set by the rental company, not by the broker, and some companies simply forbid it. If you plan to take the car on a ferry, ask in writing; ferries count as leaving the country in many contracts.

Age conditions vary by country, company and car class. Some companies charge a young-driver surcharge below a set age, and some will not rent to younger drivers at all. Older drivers may also face conditions, and a few companies ask for extra documents. Get the age rules for your booking in writing before you pay a deposit rather than discovering them at the desk.

Licence type matters too. A licence from one country is not automatically valid in another, and some countries require an IDP alongside it. If your licence is not in the local script or language, expect to be asked for the IDP even where it is not legally required.

Finally, check what your own travel insurance and credit card actually cover. Many travel policies exclude rental car damage entirely, and many card benefits require you to decline the company's CDW and pay with that card. Read the benefit guide, not the marketing page.

Prices vary too widely by country, season and car class to quote as a single figure, so treat the table below as a shape rather than a price list. The pattern is consistent: the daily rate is the visible cost, and the deposit, the excess and the fuel policy decide what you actually pay.

Budget a few minutes at pickup for the walk-around and the paperwork, and longer at busy airport desks in peak season. At return, allow time to refuel, find the drop-off and get the condition report signed; missing a flight because of a disputed scratch is a common story.

The questions below cover the points readers ask most often. They are general information, not legal or insurance advice; the contract you sign is what governs your rental.