Rental Car Fuel Policy: Full-to-Full vs Full-to-Empty Explained

Short answer

Aim for full-to-full. You collect the car full and return it full, paying only for the fuel you use. Avoid full-to-empty (pre-purchase): you pay for a whole tank up front at a marked-up price and get nothing back for what you don’t burn. All-inclusive bookings use a fair, like-for-like fuel policy.

Fuel is one of the quietest ways a cheap rental gets expensive. The policy attached to your booking can swing the real cost by €60-€120, especially on a short trip - so it’s worth understanding the options before you pick up the keys.

The main fuel policies

Full-to-full (like-for-like) - best. Collect full, return full. You pay only for the fuel you actually use, with no service charge. Keep the receipt from a station near the drop-off.
Full-to-empty (pre-purchase) - avoid. You pay for a full tank at pick-up, often above pump price, and forfeit any fuel left on return. Great for the rental desk, bad for you.
Same-to-same. Return it at whatever level you collected it. Fair, but note the exact level at handover.

Why full-to-empty costs so much

Two things stack up: the per-litre rate is usually higher than the local pump price, and you almost never return a car bone dry - so you’re paying for fuel you leave behind. On a three-day rental, the pre-purchased tank can quietly rival the price of the car itself.

How a fair fuel policy works on an all-inclusive booking

All-inclusive rates use the like-for-like approach: you receive the car with a given level and return it the same, so there’s no inflated tank to pre-buy and no fuel service fee. Combined with no hidden counter charges and the excess refunded, the price you’re quoted is the price you actually pay.

Fuel tips at handover

Photograph the fuel gauge at pick-up and drop-off.
Fill up at a station close to the return point and keep the receipt.
Check the policy on your voucher before you reach the counter.
Don’t pre-buy a tank unless you’ll genuinely return the car empty.

A fair fuel policy, every time

All-inclusive cars come with a like-for-like fuel policy - no pre-purchase trap.

Search all-inclusive cars

Frequently asked questions

What is the best rental car fuel policy?

Full-to-full (also called like-for-like): you collect the car with a full tank and return it full. You only pay for the fuel you actually use, with no markup or service fee.

What is the full-to-empty fuel trap?

Full-to-empty (pre-purchase) means you pay for a full tank up front, often at an inflated price, and get no refund for unused fuel. On short rentals this can cost more than the rental itself.

Do I get refunded for fuel I don’t use?

Only under full-to-full do you effectively pay for just what you use. Under full-to-empty there is normally no refund for the fuel left in the tank.