What is a healthy net profit margin for a UAE restaurant?

It depends on format, location and maturity, but a well-run independent restaurant typically targets a net margin in the high single digits to mid-teens as a percentage of revenue. The exact figure matters less than whether the four big cost lines — food, labour, rent and delivery commission — are each inside a sensible range. Your real P&L gives the precise picture.

From Restaurant Profit Margins in the UAE: What the Numbers Should Look Like — the full reading, with the method behind this answer.