Economy US laid out policy to curb overstay of foreign students Updated : May 14, 2018 11:52 AM IST The calculation of the number of days of unlawful presence begins from the day authorities discover the violation or an immigration judge passes an order of deportation. An overstay of more than a year could result in a permanent ban. Of the 1.86 lakh students in the US, Chinese and Indian students account for the most foreign students in the country, according to the International Student Data from the Open Doors Report (2017). Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.