India · Finance guide · Updated 9 October 2026
Quick answer: A flat rate calculates interest on the original principal throughout the stated period. Reducing-balance interest is calculated on the outstanding principal. APR represents a broader annualized borrowing-cost measure. Compare the same principal, tenure and cash flows rather than equal-looking percentages.
One amount, two different calculations
| Illustrative ₹1 lakh loan for 24 months | 12% annual flat rate | 12% annual reducing rate |
|---|---|---|
| Calculation basis | Original ₹1 lakh for both years | Outstanding balance after instalments |
| Monthly instalment, approximately | ₹5,166.67 | ₹4,707.35 |
| Total repayment before fees | ₹124,000.00 | ₹112,976.33 |
| Total interest before fees | ₹24,000 | ₹12,976.33 |
These are original mathematical examples, not lender quotes. The reducing example uses a fixed monthly rate of 12% ÷ 12 and equal end-of-month instalments. Daily accrual, disbursal dates, rounding, irregular first periods and additional charges can change an actual lender’s schedule.
What changes when fees are deducted?
If a hypothetical ₹1 lakh sanction has ₹2,360 of charges deducted before payout, usable cash is ₹97,640. If repayments remain calculated on ₹1 lakh, the effective cost is higher than the interest-only calculation. This is why sanctioned amount, net disbursal and total repayment belong on the same comparison sheet.
RBI’s Key Facts Statement circular calls for an APR computation sheet and amortisation schedule. Request the actual statement for your offered loan. Do not try to replace it with a simple multiplication of a monthly rate or a website’s starting-rate banner. A personal calculation is helpful for spotting differences, while the written offer supplies the contractual amounts.
How to compare two offers in five steps
- Keep the principal and tenure the same.
- Identify whether each advertised rate is flat, reducing, monthly or annual.
- Record fees and the net amount received, including timing of deductions.
- Compare the KFS APR and scheduled total repayment.
- Add any relevant early-exit scenario separately instead of assuming the loan runs to maturity.
If an offer shows only an EMI, ask for the number of payments and total amount. A small monthly instalment can look attractive when a longer tenure quietly adds more interest. If one quote includes an optional insurance product, request a second illustration without it when you do not want it. Compare equivalent products rather than different bundles.
A rate label is not an affordability check
Even a low-cost loan can be unaffordable if the EMI does not fit your reliable income. Plan repayments after essential expenses and existing commitments, with room for unexpected costs. Do not assume that an approved limit means borrowing that amount is sensible. The comparison should help reduce unnecessary debt, not maximize the amount borrowed.
Questions answered
Is 12% flat the same as 12% reducing?
No. In the example above the flat calculation produces materially more interest, despite the same printed percentage.
Is APR just another name for the interest rate?
No. The APR in the lender’s disclosure incorporates the applicable cash-flow and charge assumptions; inspect its computation sheet.
Can I calculate APR by dividing total fees by the principal?
That alone is not a time-based APR calculation. Repayment dates, outstanding balances and deductions also matter.
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Sources and checking date
Issuer or provider information checked on 9 October 2026. Your application offer can differ; confirm the exact variant and terms before accepting.
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