Prepay Loan vs. Invest Calculator

Solve the ultimate financial dilemma: Is it better to use surplus cash to eliminate your mortgage or invest in index funds and equities?

Loan & Investment Assumptions

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Yrs
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🏆 Financial Verdict
Prepaying Saves More
Results in a net difference of $0 at loan maturity.
Strategy 1: Prepay First, Then Invest
$0
Debt-free in 0 years, then invest full EMI
Strategy 2: Pure Market Investing
$0
Invest surplus monthly for full 25 years

The Math: Prepaying vs. Investing

This calculator does not simply compare the loan interest rate to stock returns in isolation. It simulates real-life cashflow redeployment.

The Hidden Advantage of Prepaying First: Once your home loan is completely paid off, your original monthly EMI is no longer owed to the bank. You can now redirect both your old EMI and your monthly surplus into high-growth investment portfolios for all remaining years!

Key Factors in Your Decision

  • Guaranteed vs Volatile: Debt payoff is a 100% guaranteed return. Stock returns are volatile and cannot be guaranteed over shorter periods.
  • Psychological Freedom: Living in a 100% mortgage-free home provides immense emotional security and drastically reduces baseline living expenses.
  • Liquidity Needs: Extra payments into a loan are locked in the property equity unless you have a redraw facility or offset account. Calculate offset savings with our ANZ Mortgage Calculator or test part-prepayment with our Home Loan Prepayment Calculator.

Frequently Asked Questions

Should I prepay my mortgage or invest in the stock market?

It depends on your loan interest rate, risk tolerance, and tax bracket. Prepaying your loan provides a guaranteed, risk-free return equal to your loan rate (e.g. 7%). Stock index funds historically yield 10%–11% before taxes, but with market volatility. If your loan rate is above 7%–8%, prepaying is often the smarter and safer move.

What is the 'Prepay First, Then Invest' strategy?

By prepaying aggressively, you extinguish your debt years early. Once the loan is gone, you can take your entire former EMI plus your surplus and pour that massive monthly cashflow into index funds, often creating higher ultimate net worth than pure investing!

How do taxes affect this decision?

Investment gains are typically subject to capital gains taxes (15%–20%), which lowers your net investment yield. Meanwhile, mortgage interest deductions might offset some loan interest costs.

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