The State Department is proposing requiring applicants for business and tourist visas to post a bond of up to $15,000 to enter the United States, a move that may make the process unaffordable for many.

Covered visa applicants will be required to post a bond of up to $15,000, but the State Department gave consular officers three options for bond amounts: $5,000, $10,000, and $15,000. Consular officers can determine the exact amount of the bond “based upon the applicant’s circumstances.”

The State Department said its new yearlong pilot program is aimed at making sure foreigners don’t overstay their visas. The State Department announced on Monday it will start a new pilot program in August that will require some foreign travelers to pay up to $15,