Ok, well from digging about the German Embassy to the US website it seems I might be ok on the tax front, simply by charging the going rate for the apartment I have in mind and factoring in deductables independent of mortgage interest (depreciation mainly).
From the website:
Income Tax (Einkommenssteuer)
Individuals are subject to personal income tax. Residents are taxed on their global income; nonresidents are taxed on income earned in Germany only. An individual is considered a resident of Germany if his domicile or habitual abode is located there.
Personal Income Tax Rates:
The tax is calculated on the basis of a mathematical formula which, as of the year 2004, is structured as follows:
· a zero rate on taxable income up to I 7,664
· a marginal tax rate rising from 16% to 45% on taxable income between I 7,664 and I 52.152
· a marginal tax rate of 45% on taxable income I 52.152
So it's 0% up to €7,664, now I was looking at rents and I don't think any apartment I buy will take over €600 p/m, or €7,200 p/y. Factor in other allowable deductions like depreciation (the fabric of the building is depreciable AFAIK) and that should be a nice buffer for future rent increases pushing the income over the taxable threshold.
Also from that site:
Taxation of Nonresidents
Nonresident individuals are subject to income tax only on income whose source is in Germany, as specified in Sec. 49 of the income tax code. Such types of income include:
# income from German real estate;
# gains from the sale of German real estate owned for less than ten years.
Assuming my tax liability in Germany is 0 because it will fall under the €7,664 threshold even before factoring in deductables, I assume I'd have to pay tax here on that income, thoughts?