mobility of work

Situation 1

Silvan Schuster, Austrian citizen and resident in Vienna, was responsible for modernizing the IT department of the Austrian Group company. Now he is to carry out the same task in the Swiss sister company and will therefore be seconded to Switzerland for three years by the Austrian company.

A so-called "secondment contract" is added to his local employment contract. His salary is still paid in euros by the Austrian company.
He moves to Berne with his wife and two children.

Variant

The Austrian company invoices the Swiss company on a quarterly basis for Mr. Schuster's wages and social security contributions.

Question

Which tax and social security law questions arise?

Situation 2

After three years, it is clear that Silvan Schuster's task will probably keep him in Switzerland for longer.

Instead of the secondment contract, he will therefore receive a local contract with the Swiss company. His employment contract with the Austrian company is "paused". Silvan Schuster receives the assurance that he will be offered a comparable position upon his return to Austria.

Question

Which social security and tax law questions arise?

Situation 3

Peter Meier is being promoted. He is now responsible for the Marketing & Sales division not only in Switzerland, but also in Austria and Germany. In his new function he will travel a lot. He estimates that he will probably work about two days a week at the Swiss company's headquarters in St. Gallen and will otherwise travel on business in Switzerland, Germany and Austria.

Peter Meier is a Swiss citizen and lives in Bregenz (Austria).

They are asked whether the foreign sister companies should employ him directly, with the result that he has three part-time contracts, or whether he should continue to be employed only by the Swiss group company, but the latter should charge his services to the foreign sister companies.

Questions

What are the tax and social security advantages and disadvantages of the two options?

Situation 4

Silvia Roth, a German citizen, lives in Weil am Rhein (Germany) and works in the city of Basel as head of the legal department of an insurance company. From 1 June 2017, she will work in her home office on Mondays and Wednesdays.

Variant

Ms Roth lives in Dortmund (Germany) and returns to her place of residence only irregularly at weekends. On such weekends she works from home on a daily basis (home office).

Question

What are the social security and tax law issues?

Situation 5

Marion Bucher, a German citizen, lives with her family in Bern (Switzerland) and works at her employer's headquarters in Dortmund (Germany), where she stays three days a week. Two days a week she works from home (home office).

Question

What are the social security and tax law issues?