Austrian law requires a helmet for every child under 12 riding any bicycle, including a child carried in a trailer or as a passenger, and since 1 May 2026 also for every child under 14 riding an e-bike. Past those ages there is generally no duty, though the ministry recommends a helmet at every age. The law holds the adult who supervises, carries or transports the child responsible.
This page covers Austria only: the road traffic act (Straßenverkehrsordnung, StVO) as changed by federal law BGBl. I Nr. 17/2026, published on 23 April 2026. The details were checked in October 2026 against the official Austrian government page on helmet duties. Rules can change, and the road safety board KFV stresses that legal answers can only be general principles, because the exact circumstances decide a real case. Treat this as orientation, not legal advice.
The rules at a glance
| Vehicle | Helmet required for | Notes |
|---|---|---|
| Ordinary bicycle (muscle power only) | Children under 12 | Also in a bicycle trailer and when a child is carried on the bicycle. |
| E-bike that only assists while you pedal (250 W rated power, 25 km/h design speed at most) | People under 14 | Under-14 duty since 1 May 2026; the 250 W / 25 km/h definition shown applies from 1 October 2026. |
| “E-moped”: has pedals but can reach up to 25 km/h on the motor alone, without pedaling (class L1e-B, per KFV) | All ages | Moped rules, with license, plate and insurance, since 1 October 2026. |
| Electric kick scooter | People under 16 | Separate scooter provision. |
What counts as an e-bike under this rule
The under-14 duty attaches to bicycles that Austrian law classes as e-bikes. Under the amended motor vehicle act (KFG), an electric bicycle stays a bicycle when its continuous rated power is at most 250 watts and its design speed at most 25 km/h (about 15.5 mph), unless it is a class L1e-B vehicle, the EU category for two-wheeled light mopeds. That wording takes effect on 1 October 2026, so it is the current definition.
The class matters because of how the motor behaves. KFV, which labels conventional e-bikes “bicycles with a drive system” (L1e-A), says their motor assists only while you pedal, up to 25 km/h. KFV says a bike that has pedals but can reach up to 25 km/h without any pedaling falls into L1e-B instead. In KFV’s words, what decides it is how the vehicle works, not what it looks like.
Those L1e-B “e-mopeds” sit outside the child rules above. KFV reports that since 1 October 2026 they count as motor vehicles with a helmet duty for every age group, plus a plate, registration, liability insurance and a driver’s license (at least class AM). Between 1 May and 30 September 2026 they were still on the under-14 rule. Before a child gets a bike that can run on a throttle alone, find out which class it belongs to. Our explainer on throttle versus pedal assist shows how the two behave, and our overview of e-bike laws places Austria in the wider picture.
Who has to make sure the helmet is on
The duty is not only the child’s. The statute says that whoever supervises a child cycling, carries a child on a bicycle, or transports a child in a trailer must make sure the child wears the helmet. The ministry’s page puts it the same way: the supervising adult “is responsible.” For how trailers, child seats and tag-alongs work in practice, see our guide to cycling with kids.
The law has one exemption. It does not apply when the physical condition of the rider or the child makes wearing a helmet impossible. The wording is “not possible,” not “not wanted,” so a child who simply dislikes the helmet is not covered. A family with a real physical reason should get professional advice rather than decide alone.
Fines, parents and compensation
A legal duty is not automatically a ticket. KFV’s law and standards department makes these points:
- Children under 14 cannot be punished, because criminal responsibility begins at 14.
- Parents cannot be punished for a child’s missing helmet either, because the StVO expressly says so.
- Parents are generally not liable if a child takes the helmet off after leaving home. A liability could arise, for example, where parents know the child repeatedly disregards rules.
Money can still be at stake after a crash. KFV notes that compensation for pain and suffering can be reduced when a child who was required to wear a helmet rides without one and suffers a head injury after being hit by a car through no fault of its own.
Where the duty applies
KFV says the duty applies in principle on roads with public traffic. The StVO also applies on forest and field tracks, though, so in practice the helmet duty covers almost everywhere a child rides. Merely crossing a road straight across the flow of traffic does not create a duty by itself.
What changes at 12, 14 and 16
- Pedal bike, 12th birthday: the legal duty ends. KFV confirms that the age limit for purely muscle-powered bicycles stays at 12.
- E-bike, 14th birthday: there is generally no duty after that, and the ministry recommends a helmet for all ages. KFV adds that for e-bike and road-bike riders a missing helmet can count against a damages claim, unlike on ordinary bicycles. It cites a 2025 Supreme Court decision in an e-bike case that cut a pain-and-suffering award by one fifth.
- Electric scooter, 16th birthday: the duty runs two years longer than on an e-bike. KFV points out that 14- and 15-year-olds caught on an e-scooter without a helmet face penalties.
Fitting and replacing a child’s helmet
The statute asks for the helmet to be used as intended, so how it sits matters as much as owning one. The Bicycle Helmet Safety Institute (BHSI) wants even, comfortable contact between helmet and head on every side, with the helmet staying level and steady and its front edge just above the eyebrows. It warns to expect ten to fifteen minutes for a proper fit. BHSI recommends the Eye-Ear-Mouth test developed by the Bicycle Coalition of Maine:
- Eye: glance upward; you should only just catch sight of the helmet’s front rim.
- Ear: where the two side straps merge into a Y, the junction should land slightly beneath the ear.
- Mouth: buckle the chin strap so it holds firmly, then open wide; the helmet should be drawn down a little.
If the helmet fails any of the three checks, work on the straps and fit pads again or switch to another model; our helmet guide explains how helmets work and how to choose one. Re-check the fit as the child grows.
After a crash, replace the helmet immediately, says BHSI: the foam is designed for a single use and protects less once crushed, even if the helmet looks undamaged. The same goes for a drop hard enough to crack the foam. If a child’s head took a knock, that is a question for a doctor, not for a helmet checklist.
One caution for playgrounds: BHSI says a well-fitted child’s helmet must come off before the child climbs trees or plays on playground equipment, because the helmet can catch and strangle the child, a risk BHSI says does not arise in normal riding, even in crashes.
Sources
- oesterreich.gv.at (Federal Ministry of Innovation, Mobility and Infrastructure): Compulsory wearing of helmets
- Rechtsinformationssystem des Bundes (RIS): Bundesgesetzblatt I Nr. 17/2026, 36. StVO-Novelle
- KFV (Kuratorium für Verkehrssicherheit): 36. StVO-Novelle, Fragen und Antworten zu den Änderungen in Österreich
- Bicycle Helmet Safety Institute: How to Fit a Bicycle Helmet
- Bicycle Helmet Safety Institute: When Should I Replace My Bicycle Helmet
Last reviewed: October 2026.