Do I have to pay tax on money transfers from abroad?

The money transfers themselves from abroad are generally not taxable in Germany. However, the source of that money – your income earned abroad – might be subject to tax. You would need to declare this income in your tax return, and if there's no double taxation agreement between Germany and the country where you earned the income, you might have to pay income tax. For detailed and personalized advice, it's always best to consult with a tax advisor.