Some of the workers injured and killed when the multi-storey building came down last Wednesday worked for one of its suppliers.
The high street giant says it will provide long-term aid for children who have lost parents, financial help for those injured and payments to the families of those who have died.
Meanwhile, authorities in Bangladesh have confirmed this morning they rejected foreign offers to help the rescue effort after the collapse of a factory complex in Dhaka, saying its rescue operation was "exemplary".
Home Secretary Mustak Ahmed says the government was "grateful" for the offers from the international community.
He said the need for immediate foreign assistance was not felt because the rescue operation was sufficient and exemplary.