Question on mini job income as a Erasmus student

- It generally does NOT matter, how and where you are paid. Everything below applies to your world income!
- Most scholarships are non-taxable. Please check with ERASMUS about yours.
- A mini-job (up to €450/month) is non-taxable (actually, the employer pays a flat-rate tax to the authorities on top of your pay).
- The income threshold, up to which you can be covered by your wife's public health insurance as dependent, is also €450/month. You should ask the insurer whether your scholarship counts towards that or not. The rules are too complicated to give a definitive answer here.
- If you cannot be a dependent, you need your own health insurance membership (and pay the associated fees). If you are regular student at a German university, you can get the subsidized rate of approx. €75/month. If not, the rate depends on your income and starts at around €170/month. In case of an above-€450-job, the employer pays half of this on top of your pay (plus also unemployment insurance and retirement contributions, which mini-jobs are exempted from).

I think Beppi has covered this well.  The question that springs to mind is if your wife is really insured in Germany? It sounds like you are only temporarily going to be in Germany and most married couple live together. So I have to wonder where she actually resides? If she has moved from Germany say to the UK then she will no longer be insured in Germany unless it is also just for a temporary stay. But like Beppi mentioned, if you cannot be covered for free under family insurance then the special student rates are very reasonable.