Pohiva Tu'ionetoa expects the budget to be passed by Thursday despite debates over the government books going into the night.
He has earmarked $US48 million in his $US659m budget for cyclone recovery.
Rebuilding a stronger and more resilient Tonga is the budget's theme, Mr Tu'ionetoa says.
"We have our normal priorities like the education, health and so forth and development projects that will be decided like climate change projects and so forth but the impact of the cyclone, that's the main focus."