Loan Prepayment Calculator

Calculate how much interest you save by making a lump sum part-payment on your loan. See the revised EMI or reduced tenure instantly.

📋 Loan Details
Original Loan
Original Loan Amount
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Annual Interest Rate
%
Original Tenure (Years)
Yr
Prepayment Details
Prepayment Amount
₹
After How Many Months
Mo
After Prepayment, I Prefer To
💰 Savings Summary
Original Total Interest
₹0
New Total Interest After Prepayment
₹0
Interest Saved 🎉
₹0
New Remaining Tenure
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Total Amount Saved
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Principal vs Interest Comparison

How Prepayment Works

When you take a loan, your monthly EMI is split into two parts: a portion that goes toward repaying the principal (the amount you borrowed) and a portion that goes toward interest. In the early months of a loan, the vast majority of each EMI goes toward interest — not the principal. This is because interest is calculated on the outstanding balance, which is highest at the start.

A lump sum prepayment directly reduces your outstanding principal. Since interest is always computed on the remaining balance, a lower principal means less interest accrues in every subsequent month. This effect compounds over time — a single prepayment early in the loan can save many times its own value in interest over the loan's lifetime.

After making a prepayment, you typically have two choices:

  • Reduce Tenure — Keep the same EMI, but close the loan earlier. This is the optimal strategy for maximum interest savings.
  • Reduce EMI — Keep the same tenure, but pay a lower monthly amount. This improves month-to-month cash flow but saves less total interest.

Use our Loan Comparison Calculator to evaluate two different loan offers before choosing one to prepay.

When Should You Prepay Your Loan

Prepaying a loan is not always the right decision — it depends on your financial situation, loan type, and opportunity cost. Here are the best circumstances to consider prepayment:

  • When you receive a bonus, inheritance, or windfall — Unexpected lump sums are ideal for prepayment. Instead of spending the money on discretionary items, putting it toward your loan can save far more in interest than you'd earn in a savings account.
  • When your interest rate is high — If your loan rate exceeds 8–9% and you cannot get a better investment return after tax, prepayment is usually the smarter financial move.
  • When you are in the early years of the loan — The first 5–7 years of a long-tenure loan are when interest constitutes the bulk of your EMI. Prepaying during this window gives maximum benefit. A prepayment in year 15 of a 20-year loan has far less impact.
  • When there are no prepayment charges — RBI mandates no prepayment penalty on floating rate loans. Before prepaying on a fixed rate loan, check if the charges outweigh your interest savings.
  • When you have no higher-priority financial goals — Always ensure you have an emergency fund (6 months of expenses) and are contributing to essential insurance before making loan prepayments.

For home loan borrowers, also check our Home Loan EMI Calculator to plan your repayment schedule in detail.

Frequently Asked Questions

Loan prepayment means paying a lump sum amount over and above your regular monthly EMI to reduce your outstanding loan balance. Unlike your regular EMI (which is split between principal and interest), a prepayment goes entirely toward reducing the principal. This directly lowers the base on which future interest is calculated, resulting in significant savings over the remaining loan tenure.
The RBI (Reserve Bank of India) has banned prepayment penalties on all floating rate loans — including most home loans linked to the repo rate or MCLR. However, fixed rate loans may still carry prepayment charges of 1–3% of the outstanding principal. Always check your loan agreement before making a prepayment, and calculate whether the interest savings outweigh any applicable charges.
Reducing tenure saves significantly more interest, because you exit the loan earlier and stop accumulating interest altogether. This is the mathematically optimal choice if you can sustain your current EMI. Reducing EMI, on the other hand, frees up monthly cash flow — useful if your income has become uncertain or if you want to redirect savings elsewhere. Consider your financial goals: maximum savings → reduce tenure; more monthly flexibility → reduce EMI.
The savings can be substantial. For example, prepaying ₹5 lakh on a ₹50 lakh, 20-year home loan at 8.5% in the second year can save ₹8–10 lakh in total interest and reduce the loan tenure by 2–3 years. The earlier you prepay and the higher your interest rate, the greater the savings. Use this calculator to see your exact numbers — just enter your loan details and prepayment amount to get instant results.
The best time to prepay is as early as possible in the loan tenure. In the initial years, most of each EMI goes toward interest. For a 20-year loan at 8.5%, roughly 85% of the EMI in year 1 is interest. By year 10, this ratio may be closer to 60%. Prepaying in the first 5 years gives the maximum return on your prepayment. Also see our EMI Calculator for a full amortization breakdown showing how the interest-to-principal ratio changes each month.