Flat vs Reducing Rate Calculator
Enter a flat rate and loan details to see the equivalent reducing balance rate — the true cost you're paying.
| Metric | Flat | Reducing |
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How to Use Flat vs Reducing Rate Calculator
- Enter the loan amount. Type the principal you plan to borrow, e.g., ₹1,00,000.
- Set the flat interest rate and tenure. Input the flat rate quoted by the dealer or lender and the loan period in years.
- Click Calculate. The tool computes the flat interest total, the flat EMI, and then finds the equivalent reducing‑balance interest rate by solving the EMI formula backwards.
- Read the comparison table. You’ll see the flat EMI, total interest, and the equivalent reducing rate — often shockingly higher — plus a side‑by‑side table of flat vs reducing metrics.
Benefits of Flat vs Reducing Rate Calculator
- Exposes the true cost of a flat‑rate loan by converting it to the equivalent reducing rate, the standard used by banks.
- Uses mathematical bisection to find the exact equivalent reducing rate, not a rough rule of thumb.
- Helps you negotiate — armed with the real rate, you can compare offers across lenders on a level playing field.
- No registration; your loan inputs stay private and are processed entirely in your browser.
Frequently Asked Questions
Why does a 10% flat rate equal nearly 18% reducing rate?
Because flat interest is charged on the full original principal for the entire tenure, ignoring that you repay every month. The reducing rate charges interest only on the outstanding balance, so a lower percentage yields the same total interest.
Where are flat rates commonly used in India?
Vehicle loans, consumer durable loans and some NBFC personal loans often quote flat rates. Always convert to a reducing rate or compare total payable before signing.
Can I use this calculator to compare two bank loan offers?
If one quote is flat and the other is reducing, yes. Enter the flat offer here to find its reducing equivalent, then compare that percentage directly with the bank’s reducing rate.
Is Flat vs Reducing Rate Calculator free and private?
Yes — it is 100% free, needs no sign‑up, and everything runs in your browser; your data never leaves your device.
Disclaimer: The equivalent reducing rate is a mathematical conversion, not an offer. Check with your lender.