National Institute of Technology Sikkim runs the 2026 admission cycle for its undergraduate, postgraduate and doctoral programmes through a centralised online portal. Applicants register with their basic details, fill the application form, upload the required documents (Class X / XII / Bachelor's mark-sheets, category certificate, identity proof, photograph, signature) and pay the prescribed fee online. Programme-specific eligibility, intake capacity, reservation policy and counselling rounds are detailed in the official Information Bulletin published on the admissions page. Counselling, document verification and seat allotment are conducted in 4-6 rounds. Foreign / NRI / Direct-Admission channels are operated separately where available. Helpline contact details are listed in the Bulletin.