Seatbelt and Child Seat Rules in Spain

In Spain, the seatbelt is mandatory for every occupant, front and rear, and children up to 135 cm tall must travel in an approved child restraint fitted to their weight and height. As a rule, that restraint goes in the rear seats. Getting this wrong is one of the most common ways new drivers lose points, so it is worth knowing the rules exactly before you sit the DGT theory test or put a family in the car.

Key facts at a glance

• Seatbelts: compulsory for all occupants, in the front and the rear.
• Children up to 135 cm: must use an approved restraint suited to their weight and height.
• Where: the child restraint normally goes in the rear seats.
• Front-seat exceptions: only three narrow cases allow a child restraint in front.
• DGT recommendation: keep children in a restraint up to 150 cm, not just 135 cm.
• Penalty: 200 euros and 3 points for not wearing a seatbelt; 200 euros and 4 points for a missing or incorrect child restraint.

Who has to wear a seatbelt in Spain?

Everyone. The seatbelt is obligatory for the driver and for every passenger, in the front seats and in the rear seats, on every type of road. There is no "short trip" exception and no "back seat" exception. If the vehicle has belts fitted, the people in those seats must wear them, and each person is responsible for buckling up.

This catches out a lot of drivers who learned elsewhere. In some countries, rear belts are treated casually. In Spain they are not. A passenger in the back with no belt is an offence, and in practice the driver can also be held responsible for younger occupants who are not properly restrained.

Wearing the belt correctly matters too. The lap section should sit low across the hips, not across the stomach, and the diagonal section should cross the chest and shoulder, never under the arm or behind the back.

What is the 135 cm child restraint rule?

Children whose height is up to 135 cm must use an approved child restraint system, chosen to match their weight and height, rather than the adult seatbelt on its own. The 135 cm figure is the legal threshold. Below it, an ordinary belt does not sit correctly on a small body, so a suitable seat, booster, or restraint is required.

"Approved" means the seat carries a valid European homologation label. The right type depends on the child's size: rearward-facing seats for the smallest children, then forward-facing seats, then high-backed boosters as they grow. The single rule to remember for the exam is the number: up to 135 cm, an approved restraint suited to the child is mandatory.

Here is a detail many parents miss. The DGT recommends keeping children in a restraint until they reach 150 cm, not stopping at the 135 cm legal minimum. The extra height gives the belt a proper fit across the chest and hips. It is a recommendation rather than a fine, but it reflects how the belt is actually designed to protect the body.

Why must the child seat go in the rear?

The rear seats are, on average, the safest place in the car for a child, which is why Spanish law places the child restraint there by default. The back of the vehicle is further from a frontal impact, the most common serious collision type, and it keeps children away from a deploying front airbag, which can injure a small child badly.

A front passenger airbag is designed for an adult. When it inflates, it does so with enormous force at head height for a grown-up. For a small child, and especially for a rearward-facing baby seat, that force strikes in the wrong place. This is the core reason the default position is the rear, and why moving a child to the front is treated as the exception, not the choice.

For a clear picture of how these rules connect to the wider point system, see our guide to the Spanish penalty points system.

When can a child sit in the front seat?

Spanish law allows a child restraint in the front passenger seat in only three situations. Outside these cases, the child stays in the rear. The three exceptions are:

• The vehicle has no rear seats. Some two-seat cars and certain vans simply have nowhere in the back to fit a restraint.
• All the rear seats are already taken by other children in their own approved restraints. If the back is full of correctly seated children, one more can go in front.
• The rear seats cannot fit all the required restraints. When there is physically no room to install every seat in the back, one restraint may go in the front.

If you do put a child in the front under one of these exceptions, and the seat is rearward-facing, the front passenger airbag must be deactivated first. A live airbag behind a rear-facing baby seat is dangerous. Check your car's manual for how to switch it off.

What is the penalty for breaking the rules?

Not wearing a seatbelt carries a fine of 200 euros and the loss of 3 points from your licence. Failing to use the correct child restraint is penalised more heavily, at 200 euros and 4 points. The fine is the same 200 euros in both cases; the difference is the points, 3 for an unbelted occupant and 4 for a missing or incorrect child restraint.

Losing points this way is a meaningful hit. A standard Spanish licence starts with 12 points, and a new driver starts with only 8, so a child restraint offence at 4 points removes half of a new driver's balance, and a seatbelt offence at 3 points removes more than a third. Losing all your points means losing your licence and re-sitting exams, which is why this appears so often in DGT theory questions.

The exam likes to test the exact numbers, so memorise both: an unbelted occupant is 200 euros and 3 points, and a missing or incorrect child restraint is 200 euros and 4 points.

Frequently asked questions

Do rear passengers have to wear a seatbelt in Spain?

Yes. Seatbelts are compulsory for all occupants, front and rear. There is no exception for the back seats or for short journeys. Each passenger who has a belt available must use it.

Until what height must a child use a car seat in Spain?

By law, children up to 135 cm must use an approved restraint suited to their weight and height. The DGT goes further and recommends keeping children in a restraint until 150 cm for a better belt fit.

Can my child sit in the front seat of the car?

Only in three cases: the car has no rear seats, all rear seats are already used by other children in restraints, or the restraints cannot all fit in the rear. If the seat faces backwards, deactivate the front airbag first.

What is the fine for not wearing a seatbelt?

The penalty is 200 euros and 3 points off your licence. Failing to use the correct child restraint is higher, at 200 euros and 4 points. For a new driver with 8 points, losing 3 points is well over a third of the total balance.

Does the child seat rule use age or height?

Height. The legal threshold is 135 cm, measured by how tall the child is, not their age. The seat itself must also match the child's weight, so always check the homologation label for the correct range.

Sources

• Reglamento General de Circulacion (Real Decreto 1428/2003).
• DGT, permiso por puntos.

Last updated: August 2026.