Why your EMI calculation doesn’t match the bank’s figure

An EMI calculator and a bank’s quote usually differ because they are not using exactly the same inputs. Common reasons are fees or insurance added to the loan amount, rounding the instalment up, extra interest for a part-month at the start, and a different interest rate type or tenure. Match each input and the figures should agree closely.

First, check the formula is the same

Standard EMIs use the reducing-balance formula: EMI = P × r × (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1), where P is the amount borrowed, r the annual rate divided by 12, and n the number of months. The EMI Calculator uses this formula and shows the full schedule. If the lender is quoting a flat rate, the instalment will be much higher than this formula gives; see flat vs reducing interest rates.

The usual reasons for a gap

1. The loan amount is not what you think

Processing fees, loan insurance or other charges are sometimes added to the amount you borrow rather than paid up front. A ₹10,00,000 loan with ₹20,000 of charges financed is a ₹10,20,000 loan, and the EMI is about 2% higher. Ask for the exact sanctioned amount.

2. Rounding

Many lenders round the instalment up to the next whole rupee, dollar or ten. The last instalment is then adjusted to settle the remainder. A difference of a few units is just this.

3. Interest for the first part-month

If the loan is paid out on the 12th and EMIs fall due on the 5th, there is a gap that does not match a whole month. Lenders handle this differently: some charge separate interest for those days (sometimes called pre-EMI or broken-period interest), some add it to the first instalment, and some calculate interest daily. The regular EMI is unaffected, but the first payment looks wrong.

4. The rate is not the rate you entered

• A floating rate may have been reset between the quote and the disbursement.
• The advertised rate may need a credit score, salary account or insurance you did not take.
• An APR includes fees; an EMI is calculated on the interest rate, not the APR.

5. The tenure is different

A “20-year” loan may be scheduled as 239 or 241 instalments depending on start dates, and a lender may cap the tenure by your age. One month either way changes the EMI slightly.

6. Daily interest calculation

Some lenders calculate interest on a daily balance with a 365-day year, so months with 31 days cost a little more than months with 28. The fixed EMI then pays slightly different amounts of principal each month, and the final instalment absorbs the difference.

How to reconcile the figures

1. Ask the lender for the sanctioned amount, the exact rate, the rate type and the number of instalments.
2. Enter those into the EMI Calculator and compare the instalment.
3. Compare the first two or three rows of the bank’s repayment schedule with the calculator’s.
4. For weekly or fortnightly repayments, use the Loan Calculator, which handles those frequencies.

If the inputs match and the instalment still differs by more than rounding, ask the lender to explain the calculation in writing. You are entitled to understand what you are signing.

Mistakes to avoid

• Entering a monthly rate where the calculator expects an annual one.
• Comparing an EMI calculated on the loan amount with one on the property price.
• Ignoring fees because “the EMI is the same” — they change the true cost.

Checklist

• Same amount, including any financed fees?
• Same annual rate, and reducing rather than flat?
• Same number of instalments?
• Gap only a few units? That is rounding.