Employers can grant their employees certain allowances and benefits in kind which are either completely tax and social security free or are taxed at a flat rate by the employer (so the employee receives them completely net).
Employers can grant up to 50 EUR monthly tax and social security free.
Allowances for commuting between home and the primary workplace.
Subsidizing the employee's private internet costs.
If gifts exceed the limits (e.g., 50 euros), the employer can take over the tax at a flat rate.