The instalment rate calculation is: (Estimated (notional) tax ÷ instalment income) × 100.
For example, if you borrow Rs. 10,000 at an annual interest rate of 6% for 3 years (36 months), the monthly EMI would be EMI = 10,000 (0.06/12) (1 + 0.06/12)^36 / ((1 + 0.06/12)^36 - 1) = Rs. 303.87.