IATA rate stands for International Air Transport Association rate. This is a rate that is established by IATA, a trade association of the world's airlines. These rates are used by the airlines as a pricing benchmark for air freight shipping. The IATA rates are based on the cost of providing the service, including fuel costs, handling fees, and other expenses associated with air transportation. These rates are updated regularly and are generally used as a reference point for negotiating freight rates between airlines and their customers.

It is important to note that IATA rates are not a mandatory standard, and airlines are free to set their own rates. However, most airlines and freight forwarders use IATA rates as a starting point for determining their own prices. These rates are generally used for international air freight shipping, and are based on the weight or volume of the shipment and the distance it is being transported.