What is Flat vs Reducing Interest Calculator?
Flat vs Reducing Interest Calculator helps you compare flat-rate and reducing-balance interest at the same quoted rate.
The main result is reducing-balance EMI, with a breakdown of flat-rate EMI, flat-rate interest and reducing-balance interest. The formula, example and assumptions below explain how to interpret it.
How to use Flat vs Reducing Interest Calculator
Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.
- Gather loan amount (₹), annual interest rate (%) and tenure (months). Use values from the same situation or reporting period.
- Replace the example loan amount with your own value, then complete the other fields. Check the displayed units.
- Select Calculate and read reducing-balance EMI with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
- Enter loan amount in ₹, at least 0. Decimals are accepted.
- Enter annual interest rate in %, at least 0 and at most 100. Decimals are accepted.
- Enter tenure (months), at least 1 and at most 600. Use a whole number.
Flat vs Reducing Interest Calculator: a worked example
With the inputs below, the result is ₹10,379.18 (reducing-balance EMI). Follow the example, then replace these illustrative values with your own.
| Input or output | Example value |
|---|---|
| Loan amount (₹) | ₹5,00,000 |
| Annual interest rate (%) | 9 % |
| Tenure (months) | 60 |
| Reducing-balance EMI | ₹10,379.18 |
| Flat-rate EMI | ₹12,083.33 |
| Flat-rate interest | ₹2,25,000 |
| Reducing-balance interest | ₹1,22,750.66 |
| Interest difference | ₹1,02,249.34 |
Understanding the Flat vs Reducing Interest result
Read reducing-balance EMI alongside flat-rate EMI, flat-rate interest and reducing-balance interest. These describe different parts of the same calculation.
Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.
- Example Flat-rate EMI: ₹12,083.33
- Example Flat-rate interest: ₹2,25,000
- Example Reducing-balance interest: ₹1,22,750.66
- Example Interest difference: ₹1,02,249.34
Flat vs Reducing Interest Calculator: assumptions and common mistakes
A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.
- Monthly reducing-balance estimate with a constant rate and end-of-month payments. Actual lender rounding, payment dates, rate resets, fees and taxes can change the schedule.
- Compare offers over the same tenure. A lower EMI can come from a longer loan, which may increase total interest.
For wider guidance, visit Reserve Bank of India. The formula and scope of this specific tool are stated on this page.
