by TaxationWeb@BritishA on Wed Mar 01, 2006 8:10 am
If she recieves a gift from you (in excess of this year's limitation of $114,000 or so), she must report the reciept of this gift, but she isn't taxed on it.
If she gives you a gift (in exess of the annual limitation), it triggers a gift tax return. Amounts in excess of the annual limitation reduce the amount of her tax-free estate when she dies. In addition, if the gift is in excess of the annual limit PLUS whatever remains of her lifetime limit of $1,000,000, then there is gift tax due as well.
As your wife is a US citizen, she may not be domiciled in the UK. If she isn't domiciled in the UK, then there are UK gift tax considerations as well.