Buyer acquisition costs comprise 3.5% property transfer tax (Grunderwerbsteuer), 1.1% land register entry fee (Grundbucheintragungsgebühr), and roughly 1.5–2.0% in legal/notary fees.
Foreign buyers from non-EU/EEA countries generally require official authorization from the Vienna Land Acquisition Authority (Grundverkehrsbehörde), confirming legitimate residence or cultural/economic interest.