Yes, tenants in Dubai have the right to refuse a rent increase if it does not comply with the guidelines set by the Real Estate Regulatory Agency (RERA). RERA has established a rental increase calculator that determines the maximum allowable rent increase based on the current market rates and the tenant's existing rent. If a landlord proposes an increase that exceeds the limit defined by RERA, the tenant can legally challenge this increase.

To formally refuse a rent increase, the tenant should respond to the landlord in writing, citing the RERA rental index. If the landlord insists on the increase, the tenant can file a complaint with the Rental Dispute Settlement Center (RDSC). It's crucial for tenants to be aware of their rights and to act promptly, as there are strict timelines for responding to rent increase notices​.