A property investment calculator built specifically for German tax law. Real Section 32a EStG tax brackets, AfA depreciation (linear, degressive, Section 7b, historic building), Soli and church tax, single vs shared-room rental modeling, a 30-year cashflow projection, and a portfolio planner toward a net worth goal. Paste a listing from ImmoScout and it auto-fills price, size, and rent. Runs 100 percent client-side.