Well, I have to revise myself in that not all sources say the same thing after all. They all mention the 3-year rule (yes, even incomplete years count). However, some also point out the exclusive self-use as a criterion – so your objection in this thread. Immoscout (but also others) then write things like: “If you cannot prove either the ten-year period or the three-year self-use period, you must pay speculation tax despite self-use.” But the information is probably just incomplete. So sorry for the fake news here in the thread. But I already had a feeling beforehand that I could actually save myself a discussion with you given your background. o_O