DBA (doing business as) DBA (doing business as) What you receive File name of doing business as with state (or county, as applicable per state). Certified Tax Advisor consult time billed hourly (not included.) DBA owner can be individual or an entity. Request Info $150 plus state/county filing fees Q: Why do I need a DBA? Expand A: There are a lot of reasons you could use a DBA from a basic level of privacy to marketing for sole proprietors; or you might decide to launch a new division of a current entity and save on startup by just doing business under another name.