Child Seats in Taxis: The Law, and Booking a Car That Fits Your Family

Does your child legally need a car seat in a taxi? What the UK rules actually say, which seats we fit on request, and the two details to give us when you book.

Published 3 November 2026 by Soton Cars, Southampton. Fares and times in this guide are drawn from our published fare table.

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Little Passengers, Properly Seated

Few travel questions cause more last-minute worry than this one. You are booking a taxi with a baby, a toddler or a booster-aged child, and you need to know two separate things: what the law requires in a taxi, and whether the car that arrives will have the right seat in it. The answers are different, and both matter.

The short version is this. UK law has a specific exception for licensed taxis and private hire cars, set out in plain English below. Our own practice is simpler than the law: child seats are available on request, so tell us each child's age and weight when you book, and the correct seat, infant, toddler or booster, is fitted before the car arrives.

What the Law Says About Child Seats in Taxis

In a private car, the rule most parents know applies: a child must use a child car seat until they are 12 years old or 135 centimetres tall, whichever comes first. Licensed taxis and minicabs are treated differently. Under the government guidance on GOV.UK, if the driver does not provide the correct child car seat, children can travel without one, but only on a rear seat: a child aged 3 or older must wear an adult seat belt, and a child under 3 may travel without a seat belt in that situation.

Read that exception for what it is: a safety net for unplanned journeys, the taxi hailed in an emergency, not the standard to aim for on a journey booked in advance. On a pre-booked trip the right seat can simply be in the car, and with us it is: that is the whole reason for telling us the children's ages when you book.

  • Private cars: child seat required until a child is 12, or 135cm tall
  • Licensed taxis and private hire: if no correct seat is provided, children may travel on a rear seat only
  • In that case, children aged 3 and over must use the adult seat belt; under 3s may travel without one
  • The exception covers unplanned journeys; a booked journey can and should have the right seat fitted

The Seats We Fit, by Age and Weight

Seats are fitted to the child's age and weight, not to the booking date or a guess at the door. Tell us both when you book and the right seat is specified for your car: a rear-facing infant seat for the smallest passengers, a forward-facing toddler seat with a harness, and boosters for older children who need the adult belt positioned properly. Where you can, book 24 hours ahead for journeys needing seats, so there is never a scramble.

SeatSuitsIn the car
Infant seatGroup 0+, birth to about 13 kgRear facing
Toddler seatGroup 1, about 9 to 18 kgForward facing, with a harness
Booster seatGroups 2 and 3, about 15 to 36 kgRaises the child so the belt fits
Taxi With Car Seat in SouthamptonThe child seat vehicle page: seat groups, notice and booking detail

One child seat fits in a saloon; an MPV or the minivan takes up to two. For larger families, tell us the full picture and we will match the vehicle to the children and the luggage together.

Booking a Family Taxi, Step by Step

The booking takes one extra sentence. When you call or book online, give us each child's age and weight alongside the journey details, and we specify the seat type and the right vehicle together. On airport and cruise runs this matters twice over, because seats and cases compete for the same space: an MPV carries two fitted seats and a full holiday load of luggage, which is why it is the default family choice on the longer runs.

If you would rather use your own seat, that is fine too. Tell us when you book so we send a car with the room for it, and your driver will give you the time to fit it properly before you set off. Do not leave the question to the doorstep: a seat requested in advance is a seat that is definitely there.

MPV Taxi in SouthamptonUp to six passengers, and up to two child seats fitted on requestAirport Transfers in SouthamptonFamily airport runs with the seats fitted before the car arrives

Airport and Cruise Runs With Children

Families arriving from abroad meet this question from the other side: their own seat left at home or checked into a hold, and a British airport at the end of a long flight. Book the transfer with the children's ages and the seats are fitted for the arrival, and for the return if you book both legs together. The same applies on sailing day, when a rear-facing seat is the thing nobody wants to carry onto a ship.

It is a small detail that changes the whole journey. The flight is survived, the cases are in the boot, and the children are properly seated within minutes of landing, in a car that was specified for them before the plane took off.

Frequently Asked Questions

Do children need a car seat in a taxi in the UK?
In a private car, yes, until the age of 12 or 135cm tall. Licensed taxis and private hire cars have an exception: if the driver does not provide the correct seat, a child may travel on a rear seat, using an adult belt if they are 3 or older, or without a belt under 3. For a booked journey, the better answer is to request the seat when you book.
Can I book a taxi with a car seat in Southampton?
Yes. Child seats are available on request on any booking: infant seats from birth, toddler seats and boosters, fitted to each child's age and weight. Tell us the ages and weights when you book, and give us 24 hours notice where you can.
How many child seats can one car take?
One in a standard saloon, and up to two in an MPV or the minivan. If you have more children travelling than that, tell us and we will plan the vehicles around the whole family rather than squeeze.
Can I bring my own child seat instead?
Of course. Mention it when you book so we send a vehicle with room for it, and your driver will give you time to fit it properly before setting off. Many families do this on nursery and school runs; for airport and cruise journeys, most prefer our seats to be waiting in the car.

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