Pay off mortgage early vs. invest.
In plain English
Once the required mortgage payment is covered, extra money can go toward the loan principal or into investments. The standard framing compares the mortgage's interest rate, which is the guaranteed return from paying it down early, against the uncertain expected return of investing. Extra principal payments save interest and shorten the loan, a sure thing. Investing may earn more over decades but carries market risk and no guarantee in any year. Several wrinkles sit on top of the raw rates: mortgage interest is sometimes tax-deductible, which lowers the effective rate on the debt side; a paid-off home is illiquid, so money in the house is harder to reach than money in a brokerage account; and a lower or no mortgage payment reduces monthly obligations regardless of markets. People typically weigh the guaranteed rate and peace of mind of a smaller mortgage against the higher-but-uncertain, more-liquid return of investing.
01Why it matters
A mortgage runs for decades and the money involved is large, so the difference between the guaranteed rate saved and an uncertain investment return compounds into a real gap, and the two also differ in risk and in how easily you can get the money back.
02The math, step by step
Say you can put 500 dollars a month toward a 6 percent mortgage or into investments. Extra principal earns a guaranteed 6 percent in avoided interest and gets the loan paid off years sooner. Investing the same 500 dollars might average more over 20 years but could underperform or fall in any stretch, and unlike home equity it stays liquid. Drop the mortgage rate to 3 percent and the guaranteed bar falls, changing how the uncertain investment return compares. The home equity, either way, is money you cannot easily spend without selling or borrowing against the house.
Illustrative example. The amounts here are hypothetical, chosen to show how the math works, not real quoted rates or figures.
03What this is NOT
This is NOT a recommendation for your situation. It shows the tradeoff both directions and does not rank them. Which fits you depends on your mortgage rate, whether the interest is deductible for you, your need for liquidity, your risk tolerance, and how much a smaller payment matters to you. The page describes the math and the tradeoffs, not what you should do.
04Receipts
Every figure on this page is sourced to a primary document. Tap to open the original.
Plain-English answers from our glossary. Receipts included. Never advice.
Educational tool. Answers come only from ClearMoneySchool's published glossary and are not advice. Why we never give advice