# Child seats in a rental car in Europe: what the rules say, and should you rent one or bring your own?

> In the EU, children under 150 cm have to travel in a child restraint suited to their size and weight, although countries may let children from 135 cm use an adult belt. A rear-facing seat may not go in a front seat with an active airbag. Rental companies offer child seats as a paid extra, so compare the fee for your whole trip with bringing your own seat. Whichever you choose, check the seat's approval label and condition before you drive.

Updated: 2026-10-22 · Source: https://scratchfair.com/en/blog/child-seats-rental-car

Travelling with young children makes renting a car more complicated: you need the right seat, it has to be fitted correctly, and the fee for it can add up fast over a two-week trip. ==In the EU, children under 150 cm travel in a child restraint suited to their size, so a car seat is not optional.== Here is what the rules say, what rental seats cost you in practice, and how to decide.

## What the EU rules say

The basic rules come from Directive 2003/20/EC, which applies in every EU country. Your Europe sums it up: children must have appropriate child restraints in cars. In more detail:

- **Under 150 cm:** children travel in a child restraint suited to their weight or size.
- **135 to 150 cm:** countries may allow these children to use an adult seat belt. The limit you meet therefore depends on the country.
- **Rear-facing seats:** may not be used in a front seat protected by an active airbag, unless the airbag has been switched off.
- **Approved seats only:** the seat has to meet the UN approval standards, shown on its approval label.

Countries can add their own rules, for example on where children may sit. Check the rules of each country on your route before you leave.

### Which label to look for

Two approval standards are in use. Seats approved under UN Regulation 44 show a label with weight groups. Newer seats under UN Regulation 129, also known as i-Size, show a height range and maximum weight. CLEPA, the European association of automotive suppliers, explains that R129 requires children to travel rear-facing until at least 15 months.

## Renting a seat or bringing your own?

ECC France lists child car seats among the options invoiced on top of the reservation. ECC Austria warns that extras such as child seats can cause high additional costs, and advises checking prices when you book. Check whether the fee is charged per day or per rental, and whether there is a maximum.

| Option | Advantages | Things to watch |
|---|---|---|
| Rent at the desk | No luggage, seat matched to the car | Daily fee, availability, condition unknown |
| Bring your own | You know the seat and its history | Airline rules, carrying it through the airport |
| Buy one at the destination | Useful for long stays | Cost, and what to do with it afterwards |

> [!TIP]
> Add up the child seat fee for your full rental period before you book, including a second seat or booster if you need one. Over two weeks, the total can come close to the price of a new booster seat.

If you bring your own seat, ask your airline in advance how it carries car seats. And check whether your seat fits the car category you booked: an ISOFIX seat needs ISOFIX points in the car.

## What to check when you collect a rental seat

## 1. Make sure the seat is there

ECC France advises checking at pick-up that the equipment you booked, including a child seat, is actually available. If it is not, ask for a written note on your contract.

## 2. Check the label and size

Find the approval label. Compare the weight or height range with your child. A seat that is too big or too small is not a suitable restraint.

## 3. Check the condition

Look for cracks, missing parts, frayed straps and a working buckle. Take a photo of the seat, including the label. If something looks wrong, ask for another seat.

## 4. Fit it yourself, and check the airbag

Staff may hand the seat over without fitting it. Follow the instructions on the seat, and switch off the passenger airbag if you use a rear-facing seat in the front. Ask the desk to show you where the switch is.

> [!WARNING]
> Never fit a rear-facing seat in a front seat with an active airbag. If you cannot find the switch or are unsure the airbag is off, put the seat in the back.

## When the seat becomes part of a dispute

Child seats can also come up after the rental. A seat that leaves marks on upholstery, or a stain from a spilled drink, can lead to a cleaning charge or an interior damage claim. Photograph the back seats before you fit the seat and after you remove it. Our [pick-up checklist](https://scratchfair.com/en/tools/pickup-checklist) includes the interior shots, and our guide on [photos when returning a rental car](https://scratchfair.com/en/knowledge/return/photos-when-returning-rental-car) covers the return.

If you were charged for a seat you never received, or for more days than you rented it, ask for the charge to be corrected in writing. Our [sample letters](https://scratchfair.com/en/tools/letter-templates) help you word it, and our list of [common extra charges](https://scratchfair.com/en/blog/why-rental-car-bill-is-higher) shows where these fees tend to appear.

## A short example

A family books a car in Spain for 14 days with an infant seat and a booster. At the desk, only the booster is available. They write this on the contract and ask for the infant seat fee to be removed. The desk finds a seat at another branch the next morning. The family photographs both seats and their labels, and checks that the final invoice charges the infant seat for 13 days, not 14.

## FAQ

**Up to what height does a child need a car seat in Europe?**

EU rules require a suitable child restraint for children under 150 cm. Countries may allow children between 135 and 150 cm to use an adult seat belt, so the exact limit depends on the country you drive in. Check the national rules before you travel.

**Can a child sit in the front of a rental car?**

A rear-facing child seat may not be used in a front passenger seat with an active airbag, unless the airbag is switched off. Ask the desk to show you how to switch it off in your rental car, or put the seat in the back.

**What if the rental company has no child seat when I arrive?**

Ask for the seat you booked and for written confirmation if it is missing. ECC France advises checking that booked equipment such as a child seat is available at pick-up. Do not drive without a suitable seat; ask about alternatives, and keep any receipts if you have to buy one.

## Sources

- [EUR-Lex: Directive 2003/20/EC on the compulsory use of safety belts and child-restraint systems](https://eur-lex.europa.eu/eli/dir/2003/20/oj)
- [Your Europe: Road rules and safety](https://europa.eu/youreurope/citizens/travel/driving-abroad/road-rules-and-safety/index_en.htm)
- [ECC France: Car rental in Europe (PDF)](https://www.europe-consommateurs.eu/fileadmin/Media/PDF/publications/brochures/Car_rental_in_Europe.pdf)
- [ECC Austria: Rental car tips, press release 30 June 2026 (PDF, German)](https://vki.at/system/files/2026-06/2026-06-30_PA_EVZ_Mietwagen.pdf)
- [CLEPA: New child seats, UN Regulation 129 (i-Size)](https://clepa.eu/mediaroom/new-child-seats-un-regulation-129-i-size-enhanced-child-restraint-system/)