What decides the cost of an obituary?
Length is the biggest factor. Newspapers usually bill by the word or by the printed line, and line counts depend on column width, font, and how many paragraphs the text uses, because every paragraph starts a new line.
Photos are commonly a flat fee each. Some papers also charge for emblems, extra publication days, online guest books, or a base package that includes a set number of words or lines. A minimum charge can raise the price of a very short notice.
To keep costs manageable, many families print a shorter notice and publish the full life story online through a funeral home or memorial page.