How loan and EMI calculation works
A loan payment calculator estimates your EMI (Equated Monthly Instalment), total interest, and payoff date for a fixed-rate loan. The standard formula uses a reducing-balance method — each payment covers that month's interest first, with the remainder reducing your principal.
1 Reducing Balance — the global standard
Used by most banks worldwide for mortgages and term loans
- • Interest is charged on the remaining balance each month
- • As you repay, the interest portion shrinks and principal portion grows
- • Formula:
EMI = [P × R × (1+R)N] / [(1+R)N − 1]
2 Flat Rate — watch the true cost
Some personal and vehicle loans
- • Interest is charged on the original loan amount for the full tenure
- • Each month's payment stays the same, but effective cost is much higher
- • A 10% flat rate ≈ 17–18% reducing balance rate
- • Common with some NBFCs and two-wheeler financiers
🪙 How a Gold Loan works
A gold loan calculator estimates how much you can borrow against pledged gold, based on net weight, purity, current market rate, and your lender's Loan-to-Value (LTV) ratio.
- • Gold Value: Calculated from net weight × (purity / 24) × market rate per gram. Stones and gems are excluded.
- • Eligible Loan: Lenders apply an LTV cap (typically 75% as per RBI guidelines) to that gold value.
- • EMI: Calculated on your selected loan amount using the standard reducing-balance formula.
- • Note: Actual sanctioned amount may differ — lenders conduct their own valuation and may apply deductions.
Example: ₹10L loan at 10% for 5 years
Reducing balance vs. flat rate — same stated rate, very different cost
| Metric | Reducing Balance | Flat Rate |
|---|---|---|
| Monthly EMI | ₹21,247 | ₹25,000 |
| Total Interest | ₹2,74,823 | ₹5,00,000 |
| Effective Rate | 10.00% | ~17.3% |