What an EMI actually contains
An equated monthly instalment is a fixed payment made up of two moving parts. Early in the loan most of it is interest. Later, most of it is principal. The instalment stays the same; the split inside it shifts every month.
This is why prepaying early saves far more than prepaying late, and why the "total interest" figure surprises people who only ever looked at the monthly number.
The formula
P = principal r = monthly rate ( annual ÷ 12 ÷ 100 ) n = months
Worked example
₹5,00,000 at 11.5% for 5 years
- Principal
- ₹5,00,000
- Monthly EMI
- ₹10,995
- Total interest
- ₹1,59,718
- Total payable
- ₹6,59,718
Interest adds roughly 32% to what you borrowed. Stretch the same loan to seven years and the EMI falls to about ₹8,700 — but the total interest rises past ₹2,30,000.
Reducing balance versus flat rate
This calculator uses the reducing balance method, which is standard for home, car and most bank business loans. Some lenders — particularly for equipment and small-ticket loans — quote a flat rate, where interest is charged on the full original principal for the whole tenure.
A 12% flat rate is roughly equivalent to a 21% reducing rate. If a lender quotes a rate that looks unusually good, confirming which method it uses is the first question to ask.
Costs the EMI figure leaves out
- Processing fee, typically 0.5% to 2% of the loan, often deducted upfront
- GST at 18% on the processing fee and most other charges
- Loan insurance, sometimes bundled without being clearly optional
- Prepayment or foreclosure charges, which vary widely between lenders
Frequently asked questions
How is EMI calculated?
With the reducing balance formula, where each instalment covers the interest accrued on the outstanding balance plus a portion of principal. The instalment is fixed; the internal split changes monthly.
Does a longer tenure reduce the cost of a loan?
It reduces the monthly instalment and increases the total interest. You pay less each month for longer, and more overall.
Is it better to prepay early or late?
Early. Prepayment reduces outstanding principal, and interest is charged on that principal — so a payment in year one removes far more future interest than the same payment in year five.
Does this include processing fees?
No. It covers principal and interest only. Add processing fees, GST on those fees, and any insurance separately to see the real cost.