Since no political party had enough support to form a government and all parties failed to reach coalition agreements by midnight yesterday the deadline the stage is set for an unprecedented repeat of general elections, six months after the previous ballot ended Spain's two-party system.
The king will sign a decree dissolving parliament today.
Spain has been in a political stalemate, governed by a caretaker government with Popular Party leader Mariano Rajoy as prime minister since Dec 20, when newcomer parties Podemos and Ciudadanos upset the longstanding dominance of the Popular Party and Socialists.