RNA is traditionally viewed as an output of transcription, yet emerging evidence suggests that nascent RNA and RNA–protein assemblies actively shape nuclear organization and transcriptional regulation. How RNA-mediated nuclear states influence productive genome output remains poorly understood. Here, we investigate how RNA-dependent nuclear organization biases transcriptional outcomes. Through acute perturbation of RNA polymerase II function, RNA processing factors, and nuclear architecture, we reveal that RNA production is coupled to the establishment of dynamic nuclear states that regulate transcriptional efficiency. The RNA helicase-associated factor EIF4A3 promotes nascent RNP maturation and productive elongation, whereas disruption of RNA-dependent organization shifts transcription toward pervasive, inefficient states. Together with genome-scale analyses, our findings suggest that RNA acts not only as a carrier of genetic information but also as an active architectural regulator that shapes the nuclear landscape to favor productive transcription.