Your rate bill is worked out by multiplying the capital value of your property by the total of the domestic regional rate and the domestic district rate. The regional rate is set by the NI Assembly each year. The district rates are set by each local council.
The law sets out who is legally responsible for rates. If you're responsible for paying rates you should try to pay these directly to Land & Property Services or make sure that your landlord is passing on your rates payments to Land & Property Services