Extra Payment vs Invest

Pay Off Mortgage Early, or Invest?

Compare the wealth impact of making extra mortgage payments vs. investing that money instead.

Mortgage

Remaining BalanceNT$ 10,000,000
Interest Rate2.0%
Remaining Term30 years

Extra Money

Extra Monthly AmountNT$ 5,000
Expected Investment ReturnAverage annual return if you invest instead (e.g. 0050 ETF historical avg ~7%)7.0%

With a 7.0% return vs a 2.0% mortgage, investing your extra money builds more total wealth over 30 years.

Pay Off Mortgage Early

Your contributionsNT$ 1.80M
interest saved+NT$ 552K
Total wealthNT$ 2.35M

Paying off early also shortens your mortgage by 4.7 years.

Invest Instead

Your contributionsNT$ 1.80M
investment gain+NT$ 4.05M
Total wealthNT$ 5.85M

Total Wealth From Your Extra Money

Pay Off Mortgage EarlyInvest InsteadYour Contributions

Simplified simulation assuming fixed rates. Investment returns are not guaranteed. This is not financial advice.

Should extra money go to the mortgage or into investments?

Mathematically, if investment returns beat your mortgage rate, investing usually builds more wealth; but prepaying is a guaranteed return (interest saved) while investment returns fluctuate. This calculator runs both paths on real historical returns so you can choose by risk preference.

What does the calculator take into account?

Your mortgage rate, remaining term, the extra monthly amount, and investment results simulated with real 0050 returns. It compares the net-worth gap between the two strategies at the end of the same period.

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