What is the UAE VAT registration threshold?

The mandatory registration threshold is 375,000 AED. It means that when your local UAE turnover reaches this number or you expect it to be reached in the nearest month, you should register for VAT. 

Voluntary registration threshold is 187,500 AED. Voluntary registration is done by the businesses who are planning to claim back VAT which they paid for their corporate expenses, for example office fitout and furnishings.