Loan Prepayment Break-Even Return Calculator

Calculate the investment return at which prepayment and investing produce approximately the same modelled value.

Use 0 if no deduction applies or you are unsure.

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.

What is the break-even return for loan prepayment?

The break-even rate is the annual post-tax return at which investing the lump sum roughly matches prepaying and later investing the freed EMIs. Charges and loan tax benefits can move this threshold.

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

A large margin above break-even provides a stronger case for investing. When expected returns sit close to break-even, uncertainty, liquidity and debt comfort matter more than a small modelled difference.

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

Compare the break-even figure with a realistic post-tax return for an investment matching your time horizon and risk tolerance—not with its best historical year.

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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