XM has set the minimum deposit amount for the bank wire transfer to 200 USD though, you may also need to follow the rule specified by your bank.
Please also be aware of the transfer fees charged by banks.
International bank transfer may cost more than $20, and in the XM account you will receive the amount deducted the transfer fees by the banks.
There is no extra charges from XM for bank transfer.
In case you with to transfer small amount of money but several times, there is a number of funding methods available for free and with instant processing.
For the list of available funding methods, please visit XM Official Website and login the the ‘Members Area’.