Flat vs Reducing Rate Calculator
Turn a flat rate into its real reducing-balance rate.
Enter another lender's reducing-balance rate to compare.
Your result
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Enter your numbers to see the result.
This flat vs reducing rate calculator shows what a flat interest rate really costs. Many car, two-wheeler and consumer loans quote a flat rate, which charges interest on the full loan for the whole tenure. The calculator converts it into the equivalent reducing-balance rate, which is how banks normally quote home and personal loans, and compares it with any reducing-rate offer you have.
What is a Flat vs Reducing Rate Calculator?
A flat interest rate charges interest on the original loan amount for the entire tenure, even though you repay part of the principal every month. A reducing-balance rate charges interest only on the amount still outstanding, so the interest falls as you repay.
Because of this, a flat rate always looks lower than it really is. A 10% flat rate over three years costs about the same as an 18% reducing rate. This flat vs reducing rate calculator converts any flat rate into its reducing equivalent so you can compare loan offers fairly.
How does the Flat vs Reducing Rate Calculator work?
The calculator first finds the flat-rate EMI: principal plus flat interest (principal × rate × years), divided by the number of months. It then searches for the reducing-balance rate that produces exactly the same EMI using the standard EMI formula. It also works out the EMI and interest on the reducing-rate offer you enter.
How to use the Flat vs Reducing Rate Calculator step by step
- Enter the loan amount.
- Enter the flat interest rate quoted by the lender.
- Enter the tenure in years.
- Enter a reducing-rate offer from another lender to compare.
- Read the real reducing rate and the EMI comparison.
- Use the table to convert other flat rates for the same tenure.
Flat vs Reducing Rate Calculator example with real numbers
A dealer offers a ₹5 lakh car loan at a 10% flat rate for 3 years. A bank offers the same loan at 16% on a reducing balance.
| Example input | Value |
|---|---|
| Loan amount | ₹5,00,000 |
| Flat interest rate (yearly) | 10% |
| Tenure | 3 years |
| Reducing-rate offer to compare (yearly) | 16% |
| Example output | Value |
|---|---|
| Real reducing-balance rate | 17.92% |
| EMI on flat rate | ₹18,056 |
| Total interest (flat) | ₹1,50,000 |
| EMI on 16.00% reducing offer | ₹17,579 |
| Total interest (reducing offer) | ₹1,32,827 |
| Which is cheaper | Reducing-rate offer is cheaper by ₹477 a month |
The flat vs reducing rate calculator shows that 10% flat is really 17.92% on a reducing basis. The flat loan’s EMI is ₹18,056 against ₹17,579 for the bank offer, so Reducing-rate offer is cheaper by ₹477 a month.
Key features of this Flat vs Reducing Rate Calculator
- Flat to reducing conversion
- Side-by-side EMI comparison
- Total interest for both
- Conversion table from 6% to 18% flat
- Works for any tenure
Who should use the Flat vs Reducing Rate Calculator?
Who is this Flat vs Reducing Rate Calculator for?
- Car and two-wheeler buyers
- Consumer durable loan customers
- Small business borrowers
- Sales staff explaining loan offers
Practical use cases
- Comparing a dealer loan with a bank loan
- Checking the real cost of a 0% or low flat-rate scheme
- Explaining flat rates to customers
- Choosing between two personal loan quotes
Key benefits
- Honest comparison: both offers on the same basis.
- Quick: instant reducing rate.
- Clear: EMI and interest side by side.
- Private: nothing leaves your browser.
Tips for better results
- Always ask the lender for the reducing rate or the APR in the Key Facts Statement.
- Add processing fees and insurance to the comparison; they raise the real cost.
- The longer the tenure, the bigger the gap between flat and reducing rates.
- Prepaying a flat-rate loan often saves little, because interest was fixed at the start.
Common mistakes to avoid
- Comparing a flat rate directly with a reducing rate.
- Ignoring processing fees and add-on insurance.
- Assuming the flat rate is the APR.
- Forgetting that flat-rate interest does not fall when you prepay.
Limitations of this Flat vs Reducing Rate Calculator
- It assumes equal monthly EMIs and no fees.
- Advance EMIs and subvention schemes are not modelled.
- Results are estimates; the lender’s KFS is the final word.
Flat vs Reducing Rate Calculator vs other ways to calculate
| Feature | Flat rate | Reducing rate |
|---|---|---|
| Interest charged on | Original loan for full tenure | Outstanding balance |
| Looks | Lower than real cost | True cost |
| Common for | Car, two-wheeler, consumer loans | Home, personal, business loans |
| Prepayment benefit | Small | Large |
To see your EMI on a reducing rate, use the EMI calculator. To find the rate hidden in an EMI quote, try the interest rate calculator.
Privacy and data handling
This Flat vs Reducing Rate Calculator runs entirely in your browser. The numbers you type are not sent to Qorico or stored on any server, and nothing is saved after you close the page. The Copy and Download buttons create the result on your own device. If the page has analytics turned on, it may count that a calculation happened, but it does not record the values you entered.
Flat vs Reducing Rate Calculator FAQs
What is the difference between flat and reducing rate?
A flat rate charges interest on the full loan for the whole tenure; a reducing rate charges interest only on the balance still owed.
How much is 10% flat in reducing rate?
About 17.9% for a three-year loan and about 18.2% for five years. Enter your tenure above for the exact figure.
Which is better, flat or reducing rate?
Compare them on the same basis. A reducing rate is usually cheaper unless the flat rate is very low.
Why do lenders quote flat rates?
Flat rates look lower and are simple to explain, which is why they are common in vehicle and consumer loans.
Does RBI require lenders to show the real rate?
Yes. Regulated lenders must give a Key Facts Statement that shows the annual percentage rate (APR).
Is prepayment useful on a flat-rate loan?
Usually less useful, because the interest is fixed at the start. Check the foreclosure terms.
Related tools
Sources and references
We checked the method and the current figures used in this Flat vs Reducing Rate Calculator against these official and primary sources:
Written and reviewed by the Qorico Team
