Bitcoin transactions are much cheaper than other traditional financial solutions.
There is no third party (e.g.: a bank) involved when you send money using bitcoin-technology, so the transfer costs only a fraction of the traditional international bank transfer fee. Sending money is peer-to-peer and the transaction is confirmed by the decentralised network of bitcoin, by the miners and the nodes.
In this system there are no banking costs, no bank account fees, no bank transfer fees or taxes, that is why bitcoin allows us to send and to receive money with really small costs.