Winter Tyres in Switzerland

Is there a legal obligation to fit winter tyres in Switzerland?

There is no nationwide statute that names a calendar date on which every car must switch to winter tyres, unlike in some neighbouring countries. What the law does require is that your vehicle's equipment matches the road and weather conditions you drive in, and that you remain in control of the car at all times.

This distinction matters because it shifts the practical obligation onto the driver's judgement rather than a fixed rulebook. Swiss road safety bodies and the Touring Club Suisse (TCS) recommend fitting winter tyres on all four wheels from around the end of October to Easter, and this recommendation is treated as the reference standard by police and insurers when assessing a winter accident.

What happens if you have an accident without winter tyres

This is where the rule becomes concrete. If you are involved in an accident in snowy or icy conditions while fitted with summer tyres, you can be found partly or fully liable even if another driver made the initial mistake, because the police report and your insurer will note that your vehicle was not equipped for the conditions.

Some motor insurance policies also include clauses that reduce or refuse a payout if inadequate tyres contributed to the accident. For newcomers used to jurisdictions where winter tyres are optional with no practical consequence, this is the single most important difference to understand: in Switzerland, the cost of skipping winter tyres is usually paid after the fact, through liability and insurance, rather than through a traffic fine.

Mountain passes, chains and signposted requirements

Beyond the general liability rule, some mountain roads and passes are signposted with a mandatory requirement for snow chains during winter conditions, shown by a specific road sign. These signs are enforceable on their own: driving past one without chains, when the sign is in force, is an offence independent of how the weather later plays out.

If you plan to drive regularly to or through alpine regions in winter, for work, skiing or visiting family, keep a set of chains sized to your tyres in the car from autumn onward and know how to fit them before you need to, rather than reading the instructions for the first time on the roadside.

• •Check current conditions and closures before mountain journeys in winter
• •Carry chains sized correctly for your tyres if you travel to alpine areas
• •Practise fitting chains once, in good conditions, before you need them under pressure
• •Watch for the chains-mandatory road sign on pass roads and comply immediately

Choosing and maintaining winter tyres

Winter tyres are made from a softer rubber compound that stays flexible in low temperatures, with a tread pattern designed to grip snow and slush, so they perform better than summer tyres even on a cold, dry road, not only on snow. All-season tyres exist and suit drivers with light winter exposure, but they are a compromise, and TCS testing consistently shows dedicated winter tyres outperforming them in genuine snow and ice.

Tread depth matters as much as the tyre category. A winter tyre worn below roughly 4 millimetres loses much of its snow grip well before it reaches the legal minimum for summer tyres, so check tread depth each autumn rather than assuming a tyre bought a few years ago is still adequate.

Bringing a car from abroad into a Swiss winter

If you are importing your own vehicle when you relocate, check whether it already carries winter tyres suited to the compound and tread requirements described above, since tyres designed for a milder climate rarely meet the standard expected here. This is worth resolving during the import and registration process, not after your first snowfall.