Prepay Home Loan or Invest a Lump Sum?

Compare two uses for a bonus, maturity amount or other lump sum: reduce your home loan today, or invest it for the remaining loan tenure.

Outstanding loan balance (₹)

Loan interest rate (%)

Remaining tenure (years)

Amount available to prepay or invest (₹)

Expected post-tax investment return (%)

Expected inflation (%)

Prepayment charge (%)

Effective tax benefit on loan interest (%)

Use 0 if no deduction applies or you are unsure.

Simple answer

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Both choices are compared on the same date: —

Option 1

Prepay the loan

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Loan-free sooner

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Money built by the comparison date

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This comes from investing the EMIs you no longer need after the loan closes.

Option 2

Invest the lump sum

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Keep the original loan

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Estimated investment value

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This value depends on achieving your expected investment return.

Why the calculator says this

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Show calculation details

Current monthly EMI—

New loan payoff time—

Loan interest avoided—

Difference at comparison date—

Difference in today's purchasing power—

Break-even post-tax return—

Certainty differs: loan-interest savings are relatively predictable if the rate stays unchanged. Investment returns are estimates and can be lower—or negative. Keep emergency savings aside before choosing either option.

How to compare a home-loan prepayment with a lump-sum investment

A fair comparison must give both choices the same end date. This tool compounds the lump-sum investment to the original loan end and, on the prepayment side, invests the EMIs that become available after early closure.

What the comparison includes

Interest and tenure saved by a lump-sum prepayment
Compounding if the lump sum is invested instead
Investment of EMIs freed after the loan closes early
Prepayment charges, inflation and an optional loan tax benefit

What numbers cannot decide

Investment returns are uncertain; loan savings are more predictable
Prepayment reduces liquidity and access to emergency money
Being debt-free may matter more than the highest expected return
Rates, taxes and lender rules can change during the remaining tenure

A practical decision rule

If investing wins only under an optimistic return assumption, the result is fragile. If prepayment remains ahead even when expected returns rise, reducing the loan has the stronger mathematical case.

Keep an emergency fund before using surplus cash for either option. If the result is close, splitting the amount between prepayment and investment can reduce regret and concentration risk.

Want the full decision framework?

Read the guide hub for this topic: Prepay Home Loan or Invest?. It connects the calculator with SIP comparisons, tax-benefit checks, emergency-fund decisions and rate-reset scenarios.

Open the prepayment vs investment guide

How to use this result

Do not commit emergency savings to either strategy. Model optimistic and conservative investment returns before deciding.

Results are illustrative estimates, not a lender quote or approval. Confirm rates, fees, eligibility rules and repayment terms directly with the lender.

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