Land & Property Services (LPS), part of the Department of Finance, has contacted over 16,000 business ratepayers in the Belfast City Council area to collect rental data for the non-domestic rates revaluation.
Business ratepayers and their advisers must now provide rental evidence to LPS.
In 2017/2018, business rates in the Belfast City Council area generated over £218m to help fund local and regional services.
There are approximately 4,060 offices, 3,795 shops, 1,350 warehouses and 440 factories in the area.
Alan Bronte, LPS commissioner of valuation for Northern Ireland, said he urged all business ratepayers in the council area to submit their information.
Alan Bronte, LPS commissioner of valuation for Northern Ireland, and Tracy Flannigan from RICS Northern Ireland