You may check CBP web site for detail.
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he `+[e]dH http://www.cbp.gov SomA`y+ERn eHCLENLmB The following is mentioned in U.S. Customs and Border Protection Declaration Form
6Y^UC2TBs e"u=4nk Money And Other Monetary
_RT3Fk Instruments
*{t{/^'y You may bring into or take out of the country, including
{=WTAgP by mail, as much money as you wish. However, if
cXx?MF5 it is more than $10,000, you will need to report it to
qJ=4HlLno CBP. Ask the CBP officer for the Currency Reporting
*f8;#.
Re Form (FinCen 105). The penalties for non-compliance
_T6l*
D can be severe.
0oI3Fb;E “Money” means monetary instruments and includes U.S.
q-%;~LF or foreign coins currently in circulation, currency, travelers’
bce>DLF checks in any form, money orders, and negotiable
7mipj]
instruments or investment securities in bearer form.