Nebula Award for Best Novel

The Nebula Award for Best Novel is given each year by the Science Fiction and Fantasy Writers Association (SFWA) for science fiction or fantasy novels. A work of fiction is considered a novel by the organization if it is 40,000 words or longer; awards are also given out for pieces of shorter lengths, in the categories of short story, novelette, and novella. To be eligible for Nebula Award consideration, a novel must have been published in English in the US. Works published in English elsewhere in the world are also eligible, provided they are released on either a website or in an electronic edition. The award has been given annually since 1966. Novels which were expanded forms of previously published stories are eligible, and novellas published individually can be considered as novels if the author requests it.

From the Wikipedia article “Nebula Award for Best Novel”, licensed under CC BY-SA 4.0.

Check the official rules of the Nebula Award for Best Novel for the current eligibility window, accepted formats, residency or language requirements and any entry fee. For most established prizes the publisher submits on the author's behalf, often with a limit on entries per imprint.

If you are self-published, look for an explicit statement that independently published books are accepted, and budget for entry fees and copies for judges.