noun, noun which may take the genitive case particle 'no'
budget shortfall; budget deficit; insufficient budget
Refers to a situation where the allocated budget is not enough to cover planned expenses. Commonly used in business, government, and project contexts.
予算不足で計画が延期された。
The plan was postponed due to a budget shortfall.
予算不足のため、新しい設備を導入できない。
We cannot introduce new equipment because of insufficient budget.
赤字 means 'deficit' or 'in the red', focusing on the financial result where expenses exceed revenue. 予算不足 specifically means the budget itself is insufficient, not necessarily that a deficit has already occurred.
資金不足 is a broader term for 'lack of funds' or 'shortage of money', while 予算不足 is specifically about the budget being inadequate.
Compound of 予算 (budget) and 不足 (insufficiency).