text: i am buying an apartment building and want to know how to set it up as a business separate from my personal? i am pensioned, so i don't want to go through my personal bank account for the apartment building that i am purchasing.  i live in the building.  how can i set it up as a busines? talk to your banker and get a new checking account with the name or address of the property. do not co-mingle funds.   find a good real estate lawyer (just in case) and get information from your local and/or state government offices for specifics you need to know about.   this is way too complex for just a note---see link for some helpful information.   all the best!