A car that is legal in Munich can be illegal an hour later on the same motorway. Europe has no shared winter equipment law, and the drive from a northern airport to an Alpine resort usually crosses two or three sets of rules, each written by a different government with a different idea of what counts as prepared.
None of it is complicated once the pattern is clear. There are two systems in use, a handful of dates, and one tyre marking that decides most arguments at the roadside. Here is how each country handles it, and what to have in the boot before setting off.
Two ways of writing the same rule
Some countries use calendar zones. Between fixed dates, inside a marked area, the car must carry specific equipment whether or not there is a flake of snow in sight. France works this way, and so do parts of Italy.
Others use a situational rule. There is no date-based obligation to have anything fitted, but the moment conditions turn wintry, driving without proper tyres becomes an offence. Germany and Austria both run this system, which sounds more relaxed and in practice is not. Weather does not announce itself in advance, and a car that was legal at breakfast is not necessarily legal at the top of the pass.
Switzerland does something else again, and is dealt with further down.
France: the Loi Montagne zones
From 1 November to 31 March, vehicles in designated mountain communes must either have four winter tyres carrying the alpine symbol, or carry removable devices such as chains or textile snow socks capable of fitting at least two drive wheels. The obligation covers around 34 departments across the Alps, the Pyrenees, the Massif Central, the Jura, the Vosges and Corsica, though it never applies to a whole department. Prefects designate the specific communes, so the practical question is not which department you are in but whether you have passed a sign.
Those signs are the thing to watch. A white sign with a red border and a tyre-and-chain symbol marks the start of an equipment zone, and a matching sign with a black border marks the exit. The Sécurité Routière page carries the current commune map, which is worth a look while planning rather than at a service station on the A43.
One honest caveat about penalties. The law provides for a fine of €135 and possible immobilisation of the vehicle, but enforcement has been deferred by decree more than once since the rule started in 2021, and the position has genuinely differed between seasons. A question raised in the Senate in November 2025 noted that mountain communes still had no clear confirmation of whether sanctions applied that winter. Treat the obligation as real and the fine as unpredictable, because the insurance consequences below do not wait for a decree.
Austria: situational, and strict about it
Between 1 November and 15 April, cars up to 3.5 tonnes may be driven in wintry conditions only with winter tyres on all four wheels. Snow, slush and ice all count. As an alternative, chains fitted to at least two drive wheels are accepted, but only where the road is more or less completely covered in snow or ice, which makes them a mountain-road solution rather than a way of skipping the tyre change. The official government guidance sets out the vehicle categories in English.
Two details catch visitors. Austrian practice expects a deeper tread than the legal minimum elsewhere, around 4 mm, and the base fine of €35 is not the number that matters. If a badly equipped car endangers other road users, penalties climb into the thousands, and after an accident on summer tyres the burden falls on the driver to show the crash would have happened anyway. Where signs make chains compulsory, textile socks are not always accepted, so metal chains are the safer purchase for an Austrian trip.
Germany: no dates, one symbol
German law skips the calendar entirely. Under the road traffic rules, a car may be driven in black ice, snow, slush or frost only if every wheel carries tyres suitable for winter use. In clear, dry December weather, summer tyres remain legal.
The part worth knowing is the marking. Since 1 October 2024, only tyres bearing the alpine symbol, a three-peaked mountain with a snowflake, satisfy the rule. Older tyres marked M+S alone no longer qualify, which retired a lot of otherwise serviceable rubber overnight. Fines start around €60 and rise with the circumstances, and both driver and vehicle owner can be penalised.
Italy: it depends on the road
Italy has no single national rule. Requirements come from ordinances issued by regions and by the companies that run individual motorways, so the answer changes with the route rather than the border. The common window is 15 November to 15 April on roads signed accordingly, and the requirement is met either by winter tyres or by carrying approved chains or snow socks.
Some areas start earlier and are stricter. The Aosta Valley runs from 15 October to 15 April. The Brenner motorway and South Tyrol operate their own winter equipment period. Penalties vary with the ordinance and the class of road, and can include being stopped from continuing until the car is properly equipped, which on a Friday in February costs more in lost time than in money. The European Consumer Centre keeps a country-by-country summary that is a good sanity check before a multi-country drive.
Switzerland: no law, plenty of liability
There is no Swiss requirement to fit winter tyres. There is a requirement to keep the vehicle roadworthy and under control at all times, and that is where unsuitable tyres become a problem. As the federal portal puts it, a driver whose car is not properly equipped can be held liable after an accident, and the insurer may decline to cover the full cost or pursue the driver for negligence.
Chains are a different matter. A round blue sign with a chain symbol makes them compulsory on that stretch, and it appears regularly on pass roads. MySwissAlps has a practical page on winter driving there, including the point that a legal 1.6 mm tread is nowhere near enough for an Alpine road in January.
What counts as a winter tyre
Across the region, the alpine symbol has quietly become the standard. It certifies tested snow performance, and it is now the marking that French, German and Austrian rules recognise. The older M+S stamp is a manufacturer’s description rather than a test result, which is why it has been phased out of the legal definitions.
All-season tyres are accepted in most of these countries provided they carry the alpine symbol. They are a compromise, and a noticeable one above 1,500 metres in a cold snap, but they satisfy the letter of the rules.
Chains, socks and the practical problem
Chains fit the drive wheels, not the front wheels by default, so check which those are on a hire car before assuming. Speed with chains fitted is limited, usually to around 50 km/h, and they come off as soon as the road is clear because dry tarmac destroys them fast.
The real difficulty is that almost nobody practises. Fitting chains for the first time in the dark, in a queue on an incline, with cold hands, is a miserable introduction. Ten minutes on a dry driveway before departure changes that completely. The Ski Guru has a useful roundup of the equipment rules across the Alps and Pyrenees for anyone planning a route through several countries.
Hire cars are not automatically compliant
Rental fleets based in mountain regions usually run winter tyres in season, but that is a commercial habit rather than a guarantee, and cars picked up at a lowland airport frequently do not have them. Chains are almost always a paid extra that has to be requested at booking, and stock runs out in peak weeks.
Ask two questions when reserving: whether the car will have alpine-symbol tyres on the collection date, and whether chains can be added. Then check the tyre sidewalls in the car park before driving away, because the counter staff and the fleet are not always in agreement.
The bill you actually risk
Fines are the small number. The larger one arrives when a claim is reduced or refused because the car was not equipped as the local rules required. That applies to the vehicle, and it is worth separating from the cover for the holiday itself, which has its own set of exclusions. Anyone heading out for a week on the slopes should read the winter sports section of their travel policy with the same suspicion, since off-piste terms and rescue costs catch people out in much the same way.
Two more things for the planning stage. High passes close without much warning, and the diversion can add hours, so check the status of the route the night before rather than trusting a mapping app that assumes everything is open. And in Switzerland, several car-carrying trains run through the mountains in winter, which turns an impassable pass into a twenty-minute ride on a flatbed wagon. Sitting in a warm car on a train beats fitting chains in a lay-by at altitude, and it costs less than the recovery truck.
