Prepay Your Home Loan or Invest in a SIP?
A guaranteed 8.5% against a hoped-for 12%. The answer isn't the one most people assume.
Prepaying a loan is a guaranteed, risk-free, tax-free return equal to your interest rate — prepaying an 8.5% loan is exactly as good as an 8.5% investment that cannot lose. A SIP might return 12%, but with real volatility and no guarantee. The rule: if your loan rate is above ~9%, prepay. Below ~7%, invest. In between, split — and prepay early, because a rupee prepaid in year 2 kills far more interest than the same rupee in year 15.
Last updated 17 July 2026 IST · Maintained by SnoopTool, a free online tools website with 165+ browser-based utilities.| Option | Outcome | Certainty |
|---|---|---|
| Prepay Rs 2 lakh | Saves ~Rs 6.5 lakh interest, loan ends ~2 yrs early | Guaranteed |
| SIP Rs 2 lakh lumpsum for 18 yrs @ 12% | Grows to ~Rs 15.4 lakh (pre-LTCG) | Market-dependent |
| SIP @ 8% (bad-decade scenario) | Grows to ~Rs 8.0 lakh | Market-dependent |
| Prepay Rs 2 lakh in year 15 instead | Saves under Rs 1 lakh | Guaranteed |
Why 'invest, markets return 12%' is incomplete advice
The popular argument — loan at 8.5%, equity at 12%, therefore invest — compares two numbers that aren't comparable.
The 8.5% is certain, immediate and tax-free. The interest you don't pay is not income, so it's never taxed. The 12% is an average across decades, before LTCG tax, with 30–50% drawdowns along the way. After 12.5% LTCG, a 12% return is closer to 11%. And you must actually hold through every crash to get it — many people don't.
Adjusted honestly, the gap between an 8.5% guaranteed return and a risky post-tax ~11% is far narrower than the headline suggests.
Timing matters more than the choice
The fourth row of the table is the important one. The same Rs 2 lakh saves about Rs 6.5 lakh in year 2 and under Rs 1 lakh in year 15.
This is amortisation: early EMIs are almost entirely interest (roughly 80% in year 1 of a 20-year loan at 8.5%), so early prepayment attacks the balance that generates all that interest. By year 15 most interest is already paid and you're mainly repaying principal — there's little left to save.
The practical implication: if you're going to prepay at all, prepay in the first third of the loan. Late in the loan, investing is clearly better. Test both in the prepayment calculator.
What most people should actually do
- Clear high-interest debt first. Credit cards at 36–42% and personal loans at 12–18% beat every investment. This isn't close.
- Keep the emergency fund intact. Never prepay with money you might need — you can't withdraw a prepayment. Once it's in the loan, it's gone.
- Reduce tenure, not EMI. When you prepay, banks default to lowering the EMI. Ask them to keep the EMI and cut the tenure instead — that's where the savings are.
- Split surplus 50/50 if your rate is 7–9%. You get guaranteed progress and market upside, and you won't regret either outcome.
Tools used in this guide
Frequently asked questions
Is it better to prepay a home loan or invest in a SIP?
If your loan rate is above about 9%, prepay — a guaranteed 9% risk-free return is hard to beat after tax and risk adjustment. Below about 7%, invest. Between 7 and 9%, splitting the surplus is reasonable. Timing matters more than the choice itself: prepaying in year 2 of a 20-year loan saves several times what the same amount saves in year 15.
Should I reduce EMI or tenure when prepaying?
Reduce the tenure. Banks usually default to lowering your EMI because it feels better and keeps you paying interest longer. Keeping the EMI the same and cutting the tenure captures nearly all of the interest saving. You generally have to ask explicitly — put it in writing when you make the prepayment.
Does prepaying a home loan lose me the tax benefit?
Partly, under the old regime, where you can deduct up to Rs 2 lakh of home loan interest under Section 24. Prepaying reduces the interest you pay, so it reduces the deduction. But the logic doesn't hold up: you're spending Rs 100 of interest to save Rs 30 of tax. You are still Rs 70 down. Under the new regime the deduction doesn't exist for a self-occupied property at all, so there's nothing to lose.
Can banks charge a penalty for home loan prepayment?
Not on floating-rate home loans taken by individuals — RBI prohibits foreclosure charges and prepayment penalties on those. Fixed-rate home loans, loans to non-individuals and most personal or business loans can still carry penalties of roughly 2–4% of the outstanding amount. Check your sanction letter before making a large prepayment.
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