National Novel Prize

The National Literature Prize for Narrative (Spanish: Premio Nacional de Literatura en la modalidad de Narrativa) is a prize awarded by Spain's Ministry of Culture for a novel written by a Spanish author in any of the languages of Spain. The prize is 20,000 euros. Prior to 1977, the prize appeared and disappeared several times, being given by different institutions.

From the Wikipedia article “National Literature Prize for Narrative”, licensed under CC BY-SA 4.0.

Check the official rules of the National Novel Prize 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.