Skip to content
emi.me

Prepay your loan, or invest the difference?

You have some spare cash each month. Putting it on the loan is a guaranteed saving; investing it might earn more — or less. This tool shows both paths and the return you'd need to come out ahead.

₹20,00,000
9.00%
20 years
₹15,000
12.0%

At a 12.0% return, over 20 years

Investing comes out ahead

by about ₹22,44,807 in final net worth

Prepay the loan

₹1.26 Cr

net worth at horizon

Loan clears
6 yr 10 mo
Interest paid
₹6.77 L

Invest the surplus

₹1.48 Cr

net worth at horizon

Corpus built
₹1.48 Cr
Interest paid
₹23.19 L

Break-even return ≈ 8.8% p.a. — beat that after tax and investing wins; fall short and the guaranteed saving from prepaying wins.

Assumes the surplus is invested at the end of each month at a constant pre-tax return, and compares net worth at the horizon. It ignores investment volatility, taxes on returns, and any tax deduction on home-loan interest/principal — all of which can shift the answer. Use it to frame the decision, not to make it alone.

How the comparison works

Both strategies start with the same spare cash each month. In the prepay path, that surplus goes straight onto the loan, clearing it early; once the loan is gone, the freed-up EMI plus the surplus is invested until the horizon. In the invest path, you keep paying the normal EMI and invest the surplus every month from day one. We then compare the net worth each leaves you with at the same horizon.

The key insight: prepaying is a guaranteed return

Every rupee you prepay removes future interest at exactly your loan's rate. So prepaying is mathematically the same as earning that rate, risk-free and tax-free. That's why the break-even return sits near your loan rate. With a ₹20,00,000 loan at 9% and a ₹15,000 monthly surplus, an expected 12% return makes investing the larger pile — but drop the return below roughly the loan rate and prepaying wins on certainty alone.

What the maths leaves out

The model assumes a steady, pre-tax investment return and ignores volatility, taxes on gains, and any tax deduction on your loan interest. In reality, tax usually favours prepaying, a home-loan interest deduction favours investing, and market ups and downs mean the investment outcome is a range, not a number. Use the break-even figure as your decision anchor, then adjust for your tax position, your emergency fund and how comfortable you are carrying debt.

Frequently asked questions

Should I prepay my loan or invest the money?
It comes down to a single comparison: the guaranteed, tax-free 'return' from prepaying — which equals your loan's interest rate — versus the uncertain, often taxable return you expect from investing. If you can reliably beat the loan rate after tax, investing builds more net worth; if not, prepaying wins. This tool computes both paths so you can see the gap.
What is the break-even return?
It's the investment return at which both strategies leave you equally wealthy at the horizon. As a rule of thumb it sits close to your loan's interest rate, because prepaying is mathematically equivalent to earning that rate risk-free. Beat the break-even after tax and investing pulls ahead; fall short and the guaranteed saving from prepaying wins.
Does this account for tax?
No — it compares pre-tax returns. Tax usually tilts the answer toward prepaying, because the interest you save is effectively tax-free while investment gains are often taxed. If your home-loan interest earns you a tax deduction, that pushes the other way. Treat the result as a starting frame, then adjust for your own tax position.
Isn't investing guaranteed to win over the long run?
No. Prepaying delivers its return with certainty; an investment return is an expectation, not a promise, and markets can underperform for years. The right choice also depends on your emergency fund, job stability and how you'd sleep carrying debt. The maths is one input, not the whole decision.

Keep reading