How much does it cost to licence a restaurant in Qatar?

It depends on your structure, the activities and the location — so any single figure online is indicative at best. Everyone deals with commercial registration and a trade licence through the Ministry of Commerce and Industry, a municipal licence, and food-safety and Civil Defence requirements. Treat the licences as one part of a much larger opening budget, and confirm current fees with the relevant authority.

From Qatar Restaurant Licence Cost: Every Fee, Explained — the full reading, with the method behind this answer.