Home loan EMI: compare 10, 15 and 20 years before choosing a tenure

Keep the loan amount and rate unchanged

To isolate the effect of tenure, this hypothetical comparison uses Rs. 30 lakh at 8.5% a year for every row. Payments are monthly, interest is calculated on the reducing balance, and there are no fees, missed payments, rate resets or prepayments.

Run one scenario for each term. Comparing a Rs. 30 lakh loan over 10 years with a different loan amount over 20 years would mix two effects and obscure what tenure alone changes.

The monthly saving has a lifetime cost

The EMI figures below are rounded to paise. Total interest and repayments are calculated using unrounded instalments, then rounded to the nearest rupee. A lender's monthly rounding or final adjustment can create a small difference.

Read the trade-off between adjacent rows

Moving from 10 to 15 years lowers the monthly payment by about Rs. 7,653.52 but adds about Rs. 8,54,109 in lifetime interest. Moving from 15 to 20 years lowers it by a smaller Rs. 3,507.49 while adding about Rs. 9,30,734 interest.

The longer term does not change the amount borrowed. It leaves some principal outstanding for longer, so interest continues to accrue. The smaller EMI is genuine monthly relief, but it is not evidence that the loan is cheaper.

Check affordability without pretending the shortest term is always best

A household with Rs. 30,000 available each month after its chosen commitments could fit the illustrated 15-year EMI mathematically, but with only about Rs. 458 left in that allocation. That is a narrow margin before unexpected costs or a floating-rate increase.

The calculator does not know emergency savings, dependants, income stability or upcoming expenses. Use the comparison to identify a trade-off, then assess those missing factors. Do not choose a shorter term solely because its total interest is lower.

A longer contractual term with prepayments is a separate scenario

Planning to make extra payments can change the outcome, but an intention is not the same as a completed payment. First calculate the no-prepayment baseline. Then use the prepayment calculator with a specific payment amount and month, and compare the resulting interest and payoff date.

For an existing loan, use the lender's actual outstanding balance and revised schedule when deciding. A history of changing interest rates or missed payments means a constant-rate model may not reproduce the account exactly.

Method and limits

The model uses EMI = P × r / (1 − (1 + r)^−n), where P is principal, r is the annual percentage rate of interest divided by 1,200, and n is the number of monthly payments. Here r = 8.5 / 1,200 and n is 120, 180 or 240. This input is the contract interest rate, not fee-inclusive APR.

These figures are an original hypothetical calculation, not market quotations or a borrowing recommendation. Compare the lender's written rate, charges, repayment timing and reset conditions before using a result in a decision.