When 36°C and a Suit Collide: The Legal Limits of German Workplace Dress Codes

Worldwide, 2.4 billion workers are exposed to excessive heat, according to the WHO, contributing to millions of workplace accidents each year. In Germany, the German Trade Union Federation (DGB) has issued a clear warning: once indoor temperatures hit 30 degrees Celsius, employers must take active steps to cool the environment — installing blinds, providing drinks — or risk violating their duty of care. Yet the legal reality is more complex. The employer's directive right (Direktionsrecht) allows them to set appearance rules so long as legitimate business interests exist: hygiene, safety, or a uniform corporate identity. That power, however, has strict boundaries.

Germany's Federal Labor Court ruled in 2014 that a rule only male employees could wear a captain's hat was unlawful discrimination under the General Equal Treatment Act (AGG). A more recent case from the Düsseldorf Regional Labor Court upheld a dismissal when a worker repeatedly wore black trousers instead of the prescribed red protective trousers. The message is clear: consistent enforcement is allowed, but the rules themselves cannot cross discrimination lines. Experts advise companies to negotiate works agreements (Betriebsvereinbarungen) that create clear, legally sound frameworks before disputes arise.

Heat makes these tensions tangible. In Zurich, June 2026 saw temperatures reach 36 degrees Celsius. Industries with heavy client contact — banking, for example — often insist on suits regardless of the thermometer. Legally, the directive right remains in force even during heatwaves. But if a concrete health danger emerges, employers must allow adjustments. Many firms already relax rules, introducing "Casual Friday" or switching to lighter fabrics, bright colours, and no heavy linings as practical workarounds.

As employers adapt to heat?related challenges, many still lack the formal risk assessments and safety documents needed to prove they are meeting their legal duty of care. Missing paperwork can mean costly fines and enforcement action. A free Health & Safety Toolkit offers ready?to?use templates for hazard identification, control measures, and emergency procedures – everything you need to stay compliant. Download the free Health & Safety Toolkit

A separate headache arises every four years: fan jerseys during major tournaments. For the 2026 FIFA World Cup, the question is whether employees can wear their team's shirt to work. Only if the dress code explicitly permits it. Ignoring internal rules can bring disciplinary consequences, including dismissal in repeated cases.

Beyond fashion, trade unions are pushing for structural reform. In June 2026, the European Trade Union Confederation demanded an EU-wide law on maximum working temperatures, including paid breaks and guaranteed access to water. In Germany, the DGB insists that at 30°C indoor temperature the employer must actively counteract the heat — not just passive measures like open windows. Meanwhile, the appearance of managers themselves remains largely their private matter, as long as it doesn't impair work. Unsuitable clothing from superiors may spark internal chatter, but subordinates have no legal remedy. The employer holds the longer lever through its directive right — provided it respects the boundaries of non-discrimination and health protection.

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