The cupboard is bare
Definition 1 of 1
Pro Tip 1/3Resource Depletion
Use it to express that everything has been used up, often in a resource or supply context. 
After the weekend event, the cupboard is bare. We need to restock.
Pro Tip 2/3Metaphorical Use
It can metaphorically describe any situation where there's a lack of something. 
When it comes to volunteers, the cupboard is bare; we need more people.
Pro Tip 3/3Economic Context
It's often used to discuss finances or budgeting, hinting at no money left. 
The company can't afford raises this year—the cupboard is bare.