An expatriate employee can sponsor his parents for a year's stay by paying a deposit as a guarantee for each parent as stipulated by the respective immigration department.

An expatriate employee cannot sponsor only one of his parents. He needs to sponsor both parents together. He also needs to provide proof that he is their sole support and that there is no one to take care of them back home.

If one of the parents has passed away or if the parents are divorced, he has to show the related official documents as justification to sponsor only one of his parents. 

To sponsor parents, the employed expatriate resident must earn the minimum salary stipulated and obtain a medical insurance policy for parents with the minimum coverage stipulated for each, to be renewed each year.

According to the Amer website, DNRD in Dubai stipulates a minimum salary of AED 20,000 to sponsor parents’ visa. Check terms and conditions in other emirates.