Akha,

If it helps ... example (Vaud), gross 130k:

Soc Sec (1st pillar) 5.05%
Unemployment 1%
Pension (2nd Pillar) aprox. 4%
Compulsory Medical Insurance (anything between 2-4%)

Tax at source Ded 22.72% (this will be less for you but do not expect huge difference)

Expat allowance (18k per year during 5 years)

Child allowance (after your first 6 months, retrospectively this will be added to your salary but it is taxable, aprox. 0,2 per child)

So... 30% figure looks ok for me, do not budget less!

Hope this helped.