Market drops do not change our long-term math, but they do change the feeling.
The Math: Mortgage Payoff vs. Investing
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What the numbers actually say when you run both scenarios side by side over ten years. No opinion, just the math.
The Cash Flow Picture
Math is one thing. Cash flow is another. How much flexibility does paying off the mortgage leave versus investing the difference?
What Changes When You Have Kids
Risk tolerance shifts when there are other people depending on the plan. What that means for this decision specifically.
Where We Landed
After running the numbers and having the conversation as a family, here is where we landed and why.
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Frequently Asked Questions
Should you pay off a low-interest mortgage early or invest?
For most people, the math says invest. A 3.1% mortgage is cheaper than the historical 7% return from index funds. Paying it off early gives a guaranteed 3.1% return, which is useful if you value the psychological benefit.
What about the psychological argument for paying off the mortgage?
It is real. Being mortgage-free changes how you feel about risk. For some families that psychological win is worth the mathematical trade-off. It is a values decision, not just a math decision.
Does geographic arbitrage change this decision?
It can. Selling an expensive-area home to unlock equity and buying a cheaper one outright might change the whole mortgage-versus-investing math in your favor.
Want more real-talk FIRE strategies for families?
Get the Family FIRE Letter — monthly real numbers from our family to yours.