A car transforms most beach and island trips. The rental process is where the money quietly leaks out.
Before you book
Two things decide whether the price you see is the price you pay.
- The insurance excess, which can be very high on cheap rates
- The fuel policy, where full to full is the only one that never costs you extra
At the desk
Photograph the car from every angle including the roof and wheels, and record any existing damage on the form before you leave. This takes three minutes and settles almost every dispute.
It is worth comparing the total price with excess included against a headline rate that looks cheaper but carries a high excess, since the real cost only appears if something goes wrong. A simple way to compare two offers fairly is to add the excess amount to the rental price and treat that combined figure as the true cost, rather than judging on the daily rate alone. This single check catches most of the deals that look better than they are.
Ask directly whether the tank should be returned full or empty, and get the answer in writing on the contract rather than trusting a verbal assurance from the desk. Fuel policy mismatches are one of the most common sources of unexpected charges, and staff at busy counters sometimes describe the policy incorrectly under pressure to move the queue along. A photograph of the fuel gauge at pickup, alongside the paperwork, removes any doubt later.
On the road
Check whether tolls are electronic and how they are paid, and find out what fuel the car takes. Filling a diesel with petrol is a genuinely expensive mistake.

On return
Photograph the car again and the fuel gauge, and get a signed return receipt where possible.
Card holds are the part people forget to budget for. Most rental companies place a temporary block on a card for the excess amount, sometimes several hundred, and this can sit there for days after the car is returned. Bring a credit card with enough headroom for this hold, since a debit card with little spare balance can leave you unable to pay for fuel or dinner on the last night of the trip.
Local driving rules are worth ten minutes of reading before you set off, particularly around low emission zones in city centres, which can apply automatic fines to cars that are not registered or exempt. A rental car will not always display the correct sticker for the country you are in, so check with the desk whether your route passes through a restricted zone.
When to walk away from the counter
Occasionally the car offered does not match what was booked, or the staff push a stack of extra cover with real urgency and no clear explanation of what it adds. It is reasonable to decline extras politely and ask for the booking to be honoured as confirmed, and reasonable to ask for a different vehicle if the one offered has an obvious problem, a warning light, worn tyres, or damage that has not been logged.
If the desk cannot resolve a genuine mismatch, such as an unexpected large deposit that was not disclosed at booking, it is worth pausing rather than signing under pressure to get to the hotel. A short delay while you call the booking company or check the original confirmation costs less than accepting terms you will dispute later. Most reputable operators would rather sort this out at the desk than deal with a complaint afterwards.
In short
Understand the excess, take full to full, photograph everything twice. Then enjoy the drive, which is the actual point.