You have a home loan outstanding and have saved up an extra ₹15,000 per month. Should you make an extra prepayment to get out of debt faster, or should you start a mutual fund SIP? This is a classic financial trade-off between **interest saved (guaranteed return)** vs **compounding returns (market-linked growth)**. Let's run the exact math.
Quick Overview: Prepayment vs SIP
| Factor | Home Loan Prepayment | Mutual Fund SIP (Equity) |
|---|---|---|
| Effective Return | Equal to loan interest (e.g. 8.5%) | Expected 12%–15% CAGR |
| Return Certainty | 100% Guaranteed | Variable (market-linked) |
| Tax Impact | Reduces home loan tax benefits (Sec 24b) | 12.5% LTCG on redemption |
| Liquidity | Zero (capital is locked in house) | High (can withdraw in 3 days) |
The Arbitrage Principle
If your home loan interest rate is **8.5%** and you pay tax under a slab where your effective post-tax loan cost is **7%**, any investment that yields more than 7% post-tax is technically a winner. Historically, equity mutual funds easily beat this threshold over long horizons (7+ years). The difference is called the **Arbitrage Gain**.
Interactive Prepayment vs SIP Arbitrage Calculator ↓
🧮 Loan Prepayment vs SIP Finder
Prepayment Strategy
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Total interest saved
SIP Strategy Corpus
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Net Arbitrage Advantage:
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How to Split the Difference: The Hybrid Strategy
If you are torn between mathematical optimization (SIP) and psychological comfort (being debt-free), adopt the **50:50 Hybrid Rule**:
- Allocate 50% of your extra monthly savings to make principal prepayments on your loan.
- Put the remaining 50% into a diversified mutual fund SIP.
- This reduces your tenure steadily while building a liquid investment cushion.
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Start SIP Calculator →Frequently Asked Questions
Is prepaying a home loan better than starting a SIP?
If your home loan interest rate is low (e.g. 8–8.5%) and you can comfortably earn 12% CAGR via a mutual fund SIP, starting a SIP is mathematically superior. However, for risk-averse investors, the psychological relief of being debt-free is a major factor.
Does prepaying home loan save tax?
Home loan interest payments provide a tax deduction under Section 24(b) (up to ₹2 Lakhs per year). Prepaying reduces your interest outstanding, which will lower your tax deductions. This must be factored into your calculations.
How can I do both prepaying and SIP?
A popular hybrid strategy is to split your extra monthly capital 50:50. Put half towards prepaying your loan principal and the other half into an equity mutual fund SIP. This gives you both capital growth and debt reduction.
