Loan Prepayment Calculator

See exactly how much interest a lump-sum prepayment saves you, and compare reducing your tenure versus reducing your EMI side by side.

Current EMI ₹0
Total Interest (No Prepayment) ₹0

Reduce Tenure (EMI stays same)

₹0
New Tenure0 yrs
Tenure Reduced By0 months

Reduce EMI (Tenure stays same)

₹0
New EMI₹0
EMI Reduced By₹0
Note: Both options shown assume a single lump-sum prepayment made today. Amounts shown are interest saved compared to making no prepayment at all.
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What is a Loan Prepayment Calculator?

When you make a lump-sum payment toward your loan beyond the regular EMI, your lender gives you a choice: keep the same EMI and finish the loan sooner, or keep the same tenure and pay a smaller EMI each month. These two options can produce very different total interest savings for the exact same prepayment amount. This loan prepayment calculator runs both scenarios side by side so you can see which one actually saves you more before you call your bank.

How Prepayment Savings Are Calculated

EMI = P × r × (1 + r)ⁿ / ((1 + r)ⁿ − 1)
where P = principal, r = monthly interest rate, n = tenure in months

After a prepayment reduces your principal, the calculator solves the same formula in reverse — either for a shorter tenure at your existing EMI, or for a lower EMI at your existing tenure — and compares the resulting total interest against what you would have paid with no prepayment at all.

Worked Example

Scenario: ₹30,00,000 outstanding, 8.5% annual interest, 180 months (15 years) remaining, with a ₹5,00,000 lump-sum prepayment made today.

OptionOutcomeApprox. Interest Saved
Reduce Tenure (EMI unchanged)Loan closes roughly 3.5 years earlierHighest
Reduce EMI (Tenure unchanged)EMI drops by roughly ₹4,300/monthLower than tenure option

Enter these exact figures into the calculator above to see the precise rupee numbers for your situation — the gap between the two options widens further the earlier you are in your loan tenure.

When Each Option Makes Sense

  • Reduce Tenure — choose this if your monthly budget can comfortably absorb the current EMI and your goal is minimizing total interest paid and becoming debt-free sooner.
  • Reduce EMI — choose this if your priority is freeing up monthly cash flow right now, for example to fund another goal or handle a tighter budget, even though it costs more in total interest.
  • Early tenure prepayment — either option saves substantially more if done in the first third of your loan, since interest is front-loaded in EMI-based amortization.
  • Late tenure prepayment — savings shrink considerably near the end of a loan, since most of the remaining EMIs are already principal-heavy.

Frequently Asked Questions About Loan Prepayment

Reducing your tenure while keeping the EMI unchanged almost always saves more total interest than reducing the EMI while keeping the tenure the same, for the same prepayment amount. This is because keeping the EMI constant means you continue paying down principal faster every month, shrinking the amount future interest gets calculated on sooner. Choose reduce-EMI only if your actual priority is monthly cash flow relief right now, not the lowest total interest cost.

For floating-rate home loans, RBI rules prohibit banks and NBFCs from charging any prepayment penalty to individual borrowers, regardless of the amount or source of funds used. Fixed-rate loans are treated differently and can carry a prepayment charge, typically 2-4% of the prepaid amount, so check your loan agreement's interest type before assuming prepayment is free. Personal loans and some other loan types may still carry charges even at floating rates, so this rule is strongest for home loans specifically.

Compare your loan's interest rate against the realistic post-tax return you expect from investing. If your home loan costs 8.5% and you can reliably earn more than that after tax from equity or other investments over the same period, investing can come out ahead mathematically, though it carries market risk that prepayment does not. If your loan rate is higher than what you can safely earn elsewhere, or you simply value the certainty and peace of mind of being debt-free sooner, prepayment is the more conservative choice.

Even a prepayment equal to just one or two extra EMIs per year can meaningfully shorten a long-tenure loan, because prepayments made early in the loan term have outsized impact — they cut principal while the largest share of interest is still front-loaded. A prepayment of 5-10% of the outstanding principal, made in the first third of your loan tenure, typically saves noticeably more interest than the same rupee amount prepaid closer to loan maturity, when the interest component of each EMI is already small.

Yes, most lenders allow multiple partial prepayments throughout the loan tenure, and doing so periodically, such as whenever you receive a bonus or matured fixed deposit, compounds the interest savings further since each prepayment reduces the principal that future EMIs are calculated against. This calculator models a single lump-sum prepayment for clarity; for multiple prepayments spread over time, calculate the impact of each one sequentially using the updated outstanding balance after the previous prepayment.

Prepaying a loan, whether partially or fully, is generally viewed positively by credit bureaus since it reduces your outstanding debt and demonstrates repayment discipline. Closing a loan entirely through full prepayment can occasionally cause a very small, temporary dip in some scoring models due to a reduced credit mix or shortened average account age, but this effect is minor and typically recovers within a few months, especially if you maintain other credit accounts responsibly.

Most lenders require a written prepayment request (often via net banking or a simple form), your loan account number, and confirmation of the source of funds for larger amounts, particularly for home loans where anti-money-laundering checks may apply. Some lenders ask for updated bank statements or a cancelled cheque for the payment. Processing is usually completed within a few working days, after which you should request an updated amortization schedule or loan statement reflecting the new balance and terms.

The core math is identical, but car loans are more frequently fixed-rate, which means prepayment charges are more common and can range from 2-6% of the outstanding amount, unlike floating-rate home loans where such charges are banned by RBI for individual borrowers. Car loans also depreciate quickly against a shrinking asset value, so some borrowers weigh prepayment more heavily for cars specifically, since the loan can otherwise outlast the vehicle's resale value.

Generally no. Financial planners typically recommend maintaining 3-6 months of expenses in an accessible emergency fund before directing surplus money toward loan prepayment, since prepaid amounts are not easily reversible and you may need to borrow again, often at a higher rate, if an emergency arises after depleting your buffer. Prepay with money that is genuinely surplus beyond your emergency fund and near-term financial goals.

No, this calculator shows the pure interest-saving impact of your prepayment amount and does not deduct any processing fee or prepayment charge your lender might apply. If your loan is fixed-rate and carries a prepayment penalty, subtract that cost from the interest saved figure shown here to get your true net benefit before deciding whether to proceed.

Earlier is generally better, since EMI-based loans are structured so that a much larger share of each EMI goes toward interest in the initial years, with the principal component increasing only gradually over the tenure. A prepayment made in year 2 of a 20-year loan reduces far more future interest than the identical rupee amount prepaid in year 15, when most of the remaining EMIs are already principal-heavy. This does not mean late-tenure prepayment is pointless, just that it delivers a smaller interest-saving benefit per rupee.