You may check CBP web site for detail.
O?e9wI=H )eyzHB,H http://www.cbp.gov 8rsc@]W 0JlNUO5Nt The following is mentioned in U.S. Customs and Border Protection Declaration Form
@{y'_fw *()['c#CC Money And Other Monetary
1sqE/-v1_^ Instruments
g*V.u]U!i You may bring into or take out of the country, including
C%o|}i v" by mail, as much money as you wish. However, if
NHd@s#@ it is more than $10,000, you will need to report it to
pR
S! CBP. Ask the CBP officer for the Currency Reporting
-zg*p&F Form (FinCen 105). The penalties for non-compliance
2*NPK} can be severe.
ppAbG,7 “Money” means monetary instruments and includes U.S.
t dm7MPM or foreign coins currently in circulation, currency, travelers’
B.8B1MFm checks in any form, money orders, and negotiable
{iD/0q instruments or investment securities in bearer form.