Yes, you can apply to Harvard for a BS in Computer Science even after completing Class 12 from NIOS. Harvard accepts students from various educational boards, including open schooling, as long as your academic records are strong and well-documented. Admission is highly competitive and depends on multiple factors like academic performance, extracurriculars, essays, recommendation letters, and English proficiency scores such as TOEFL or IELTS. While SAT or ACT scores are optional, submitting them can strengthen your application.

The total cost of studying at Harvard is around 60 to 65 lakhs per year, including tuition, accommodation, and other living expenses. However, Harvard provides very generous financial aid. If your family income is below 70 lakhs per year, you may get significant scholarships or even attend almost for free, depending on your financial need.