
US Visa Singapore
Extension of stay is for foreigners holding non-immigrant visas such as B1 business visas, B2 tourist visas or F1 student visas to extend their stay in the US.
How long a non-immigrant visa holder is allowed to stay depends on what they put on the visa application form and the final decision is determined by US Customs officers upon arrival in the US.
The I-94 card placed in the visa holder's passport will have a date on it that states how long the visa holder is actually allowed to stay in the US. Thus, the date on the I-94 card is the date that matters and not the expiration date of the US visa.
Foreigners waiting on extension of stay applications to process should leave the US before their visa expires. An overstay can result in being banned from the US for a number of years.
Extension of stay applications normally take 2 months or more to process depending on the caseload of USCIS office where the application is filed.