What rate should you enter
Scheme-linked loans under PM Surya Ghar, offered by nationalised banks through the Jan Samarth portal, have published rates near the repo rate plus 0.5 percentage points for smaller loans, historically around 5.75% a year for eligible amounts up to ₹2 lakh, with a higher published rate for the ₹2 lakh to ₹6 lakh slab. A general personal loan, NBFC solar loan or vendor-arranged finance can carry a meaningfully higher rate. Use the exact figure from your own sanction letter or offer, not this reference range, since rates are revised periodically and vary by lender and applicant profile.
How the EMI is calculated
This tool uses the standard reducing-balance formula banks use for a fixed-rate loan. Each month, interest is charged on the balance still owed, and the remaining EMI amount reduces the principal. Because the balance falls every month, the interest portion of each EMI falls too while the principal portion rises, even though the EMI itself stays the same.