When the US person deposits money in the joint bank account, there is no gift. However, when the foreign person withdraws money from that joint account, then there is a completed gift. The US person can give up to $14,000 a year to the foreign person. If the US person gives more than that, then the US person will be required to file a gift tax return, but a gift tax will not be owed until the US person exhausts his $5.45M lifetime exclusion.
Answered on Jan 23rd, 2016 at 9:48 PM