You may check CBP web site for detail.
eaNfCXHDN )X," NJG http://www.cbp.gov g33Y$Xdk 8 e_] The following is mentioned in U.S. Customs and Border Protection Declaration Form
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L7kpH+y Money And Other Monetary
=BN<)f^*s Instruments
={v(me0ZPb You may bring into or take out of the country, including
Xs|d#WbX by mail, as much money as you wish. However, if
6w?
GeJ it is more than $10,000, you will need to report it to
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+BC2x CBP. Ask the CBP officer for the Currency Reporting
9{U@s Form (FinCen 105). The penalties for non-compliance
g]JRAM can be severe.
-(e=S^36 “Money” means monetary instruments and includes U.S.
M@7U]X$g or foreign coins currently in circulation, currency, travelers’
%QrO Es checks in any form, money orders, and negotiable
J zFR9DEt instruments or investment securities in bearer form.