Advanced Home Loan Calculator
Calculate your home loan EMI, see the effect of extra prepayments, and compare interest rate scenarios side by side.
Comparison & View
Recalculate after changing these to update the side-by-side rate comparison.
How to use this calculator
Enter the loan amount, annual interest rate, and tenure to calculate your monthly EMI. Add an extra monthly prepayment to see exactly how much sooner the loan is paid off and how much interest that saves. Set up to two additional rates in the settings panel to compare EMI and total interest side by side, and toggle the amortization table between yearly and full monthly detail — export either view as a CSV.
Why home loans need more than a basic EMI number
A home loan can run for 20 or 30 years, so small differences in rate or a modest prepayment habit add up to large amounts of money over the loan's life. This calculator goes beyond a bare EMI figure to model two decisions that matter most for a loan this size: what happens if you pay extra each month, and how much a better (or worse) interest rate would actually change your outcome.
How prepayment and comparison are calculated
The base EMI uses the standard formula EMI = [P × R × (1+R)^N] ÷ [(1+R)^N − 1]. With an extra monthly prepayment, the calculator simulates the loan month by month: each month, the extra amount is added on top of the interest-and-principal split of the EMI, directly reducing the outstanding balance faster than the EMI alone would. That smaller balance means less interest accrues every subsequent month, which is why prepayment savings compound rather than just adding up linearly.
Worked example
A ₹35,00,000 loan at 8.5% over 20 years (240 months) has an EMI of approximately ₹30,374, with total interest of about ₹37,89,715 over the full term — more than the original loan amount. Put ₹5,000 into the Extra Monthly Prepayment box and the loan closes after 171 payments (14 years 3 months) instead of 240. Total interest falls to about ₹25,48,039, a saving of ₹12,41,676, because each extra rupee comes off the balance that every later month's interest is charged on.
Frequently Asked Questions
Does prepaying extra every month actually save much interest?
On the default loan, yes: ₹5,000 a month on top of the ₹30,374 EMI ends the loan in 14 years 3 months instead of 20, and saves ₹12,41,676 of interest. That is because home loan interest is front-loaded: in the early years most of each EMI goes toward interest, not principal. Extra amounts paid on top of the EMI go straight toward principal, which reduces the balance interest is calculated on for every remaining month of the loan.
Should I prepay my home loan or invest that money instead?
It depends on your loan's interest rate versus your realistic expected investment return, after accounting for risk. If your home loan rate is 8.5% and you're confident in earning more than that post-tax elsewhere, investing may edge out prepayment mathematically — but every rupee prepaid earns exactly your loan rate with no risk, while the investment return is only an expectation.
How much does a 1% rate difference actually matter?
On the default ₹35 lakh over 20 years, 8.5% costs ₹37,89,715 in total interest and 9.5% costs ₹43,29,902: ₹5,40,187 more, for an EMI only ₹2,251 higher. Dropping to 7.5% saves ₹5,22,732. The rate comparison panel above runs those two cases for whatever loan you enter, and both comparison rates can be changed.
Is a longer tenure with a lower EMI always the safer choice?
It lowers monthly strain, but it isn't free — a longer tenure means paying substantially more total interest over the life of the loan, since the balance stays higher for longer. If your income can comfortably support a shorter tenure's higher EMI, it usually saves a meaningful amount of money over time, assuming your finances stay stable enough to sustain it.
Related Tools
Related Blog Posts
How to Calculate Home Loan EMI and Reduce Total Interest
A worked ₹40 lakh example showing where your EMI goes, and what a shorter tenure, a lower rate, and prepayments each save in rupees.
Read moreHow to Calculate GST in India — Step by Step
The two GST formulas (adding tax and removing it), how the amount splits into CGST + SGST or IGST, and worked examples for discounts and invoices that mix tax rates.
Read moreProfit Margin vs Markup: Pricing, GST and Discounts Worked Out
The markup-to-margin conversion table, pricing a ₹600 product for a 40% margin (₹1,000, not ₹840), why margin calculated on a GST-inclusive price is wrong, and why a 20% discount means selling twice as many units.
Read more