Home Loan Rate Went Up? How to Work Out Your New EMI or Tenure

Your home loan is on a floating rate and the lender has just raised it. Now either your EMI goes up or your loan runs for longer, and the cost of each choice is not obvious from the new EMI alone. This guide shows how to work out both answers yourself, using a ₹30 lakh example, and why the two options cost such different amounts.

The quick way: start from your outstanding balance

1. Open the EMI Calculator and enter your original Loan amount, Interest rate (per year) and Loan tenure.
2. In the Repayment schedule, find the closing balance after the EMIs you have already paid. The Yearly view shows it at the end of each loan year; the Monthly view shows it after every EMI. Your loan statement shows the same figure, and that is the one to trust.
3. Enter that balance as the new loan amount, the new rate, and the number of EMIs left as the tenure (choose Months). The Monthly EMI shown is your new EMI if the end date stays the same.
4. To keep your current EMI instead, raise the tenure in months until the EMI comes back down to what you pay now. That is roughly your new remaining tenure.

The calculator assumes one rate for the whole tenure, so every rate change means a fresh calculation from the balance at that point.

The worked example

Say you borrowed ₹30,00,000 at 8.5% a year for 20 years (240 months).

• The EMI is ₹26,034.70.
• In the first month, ₹21,250.00 of that is interest and only ₹4,784.70 repays the loan.
• After 24 EMIs, the yearly schedule shows a closing balance of ₹28,75,308.65. You have paid ₹6,24,832.80 in total: ₹5,00,141.45 of interest and only ₹1,24,691.35 of principal.

Now the lender raises the rate to 9.25% (an example), with 216 EMIs still to go. Had the rate stayed at 8.5%, those 216 EMIs would have carried about ₹27.48 lakh of interest.

Option 1: pay a higher EMI and keep the end date

Enter ₹28,75,308.65 at 9.25% for 216 months. The new EMI is ₹27,376.36, which is ₹1,341.66 a month more. The interest over the remaining 216 months rises to about ₹30.38 lakh, roughly ₹2.9 lakh more than before the change.

Option 2: keep the EMI and extend the tenure

Keep paying ₹26,034.70 and try longer tenures. At 248 months the calculator shows an EMI of ₹26,042.06, just above your current EMI; at 249 months it shows ₹26,007.25, just below it. So the loan now needs about 249 more EMIs instead of 216: 33 extra months, close to three more years. The interest still to pay grows to about ₹36 lakh, more than ₹8 lakh above the original path.

If you prefer a formula to trial and error, the number of months needed to repay a balance B with a fixed EMI is:

n = −log(1 − r × B ÷ EMI) ÷ log(1 + r)

Here r = 9.25 ÷ 12 ÷ 100 ≈ 0.0077083, B = ₹28,75,308.65 and EMI = ₹26,034.70, which gives n ≈ 248.2. That means 248 full EMIs and a smaller 249th.

Why the longer tenure costs so much more

Look at a single month. At 8.5%, the 25th EMI would have carried ₹20,366.77 of interest, so ₹5,667.93 went towards the loan. At 9.25%, the interest on the same balance is about ₹22,164, so only about ₹3,871 of the same EMI repays the loan.

With less principal repaid each month, the balance stays high for longer, and every extra month carries interest on that high balance. That is why stretching the tenure added more than twice as much interest as raising the EMI did in this example.

There is also a hard limit. If the rate rises far enough that a month's interest equals the whole EMI, no tenure is long enough, because nothing is left to repay the loan. In this example that point is about 10.87%: ₹28,75,308.65 × 10.87% ÷ 12 is about ₹26,046, slightly more than the EMI. Beyond that, the EMI has to rise.

Choosing between the two

This is a trade-off between your monthly budget and the total cost, and only you can weigh it:

• A higher EMI keeps the end date and costs less interest overall, but needs room in your monthly budget.
• A longer tenure keeps your monthly outflow the same, but costs more interest and pushes the last EMI further away. A lender may limit how far the tenure can be stretched.
• A prepayment lowers the balance, and with it either the new EMI or the extra months. Check your loan agreement for prepayment charges first.

The same calculation works when the rate falls. Keeping the old EMI then shortens the tenure and saves more interest than lowering the EMI does.

Frequently asked questions

Can I just enter the original loan amount with the new rate?

No. That would assume the new rate applied from the first EMI and would ignore the principal you have already repaid. Always start from the outstanding balance and the number of EMIs left.

Why is my bank's new EMI a few rupees different?

Banks may round the EMI to the nearest rupee or calculate interest daily rather than monthly. Your revised repayment schedule from the bank has the exact figures.

Can I save the new schedule?

Yes. After entering the new balance, rate and tenure, Download CSV saves the monthly or yearly schedule. Add the First EMI month to see calendar months in it.

Wrapping up

When your rate changes, take the outstanding balance from your statement, enter it in the EMI Calculator with the new rate and the EMIs left, and compare the higher-EMI and longer-tenure options before you accept either. Treat the results as estimates and check them against the revised schedule from your lender. If you are also comparing an offer from another lender, the Loan Calculator shows its monthly payment and total cost side by side with yours.