Everyone knows prepaying a home loan saves interest. What surprises people is how much it matters WHEN you do it. The exact same prepayment, made early instead of late, can save you several times more — because of how loan interest is front-loaded.
The base loan
Take a ₹30 lakh home loan at 9% for 20 years. The EMI works out to about ₹26,992 a month. Over the full 20 years you'd pay roughly ₹34.8 lakh in interest — more than the loan itself. That's the number prepayment attacks.
Try it on your numbersGold Loan CalculatorHow much loan you can get per gram of goldWhy early prepayment wins so big
Banks charge interest on the outstanding balance, which is highest at the start. So your early EMIs are mostly interest. A prepayment in year 1 wipes out principal that would otherwise have been racking up interest for nearly two decades — so it removes a huge stack of future interest. The same rupee paid near the end removes almost none, because little interest is left.
The same ₹5 lakh, two timings
Keep the EMI the same and make a one-time ₹5 lakh prepayment:
- Prepay ₹5 lakh in year 1 → the loan finishes in about 13.2 years instead of 20, and total interest drops from ~₹34.8 lakh to ~₹17.9 lakh. You save roughly ₹17 lakh.
- Prepay the same ₹5 lakh in year 10 → you save only about ₹5.6 lakh in interest.
- Identical amount, but the year-1 timing saves about three times more.
Even one extra EMI a year helps
No lump sum handy? Prepaying just one extra month's EMI each year — using a bonus or a tax refund — quietly knocks years off the tenure on a 20-year loan. The key is to tell the bank to reduce the tenure, not the EMI: keeping the EMI constant is what front-loads the principal reduction and maximises interest saved.
One caution: most banks charge no prepayment penalty on floating-rate home loans (RBI rules), but fixed-rate loans can. Check before you prepay. See exactly what any prepayment does to your own loan, month by month:
Before you prepay, run the bigger question: would investing that same money beat the interest you'd save? It depends on your loan rate vs your expected return — see the verdict for your numbers:
Prepay vs Invest — which makes you richer?Frequently asked questions
- Is it better to prepay a home loan early or late?
- Early, by a wide margin. Interest is charged on the outstanding balance, which is highest at the start, so early EMIs are mostly interest. On a ₹30 lakh, 9%, 20-year loan, a ₹5 lakh prepayment in year 1 saves about ₹17 lakh, but the same prepayment in year 10 saves only about ₹5.6 lakh.
- Should I reduce the EMI or the tenure when I prepay?
- Reduce the tenure. Keeping your EMI the same after a prepayment is what slashes the most interest, because more of each future payment goes to principal. Lowering the EMI instead feels nicer monthly but saves far less overall.
- Is there a penalty for prepaying a home loan?
- On floating-rate home loans, RBI rules bar prepayment penalties — you can prepay freely. Fixed-rate loans may carry a charge, so check your loan terms before making a large prepayment.