Should You Pay Off Your Mortgage Early?

This is the single most useful reframe, and most articles skip it.

If you pay an extra $1,000 toward a 6.25% mortgage, you do not earn 6.25%. You avoid paying 6.25% — every year, on that $1,000, for as long as the loan would have run. Financially those are the same thing, with one important difference: avoiding an expense is certain, while earning a return is not.

So the honest comparison is never "6.25% vs. the stock market's 10%." It is "a guaranteed 6.25% vs. an uncertain something-else." That framing changes the answer for a lot of people.

On our example loan — $400,000 at 6.25% over 30 years — here is what the guaranteed side looks like:

$104,950, guaranteed, for $200 a month. That is a real and substantial number. Now let's find out whether it should be your $200.

Almost every "should I pay off my mortgage" question is really a question about priority. Here is the sequence most of the trade-offs resolve into, strongest claim on your money first.

1. An emergency fund comes first

Money paid into a mortgage is gone — not spent, but locked in the walls. You cannot withdraw it if the car dies or the job ends. You would have to sell or borrow it back out, and a lender is least likely to approve you precisely when you most need the cash.

Ironically, aggressive prepayment can increase your risk of foreclosure: a homeowner with $60,000 of extra principal in the house and $500 in savings is more fragile than one with $60,000 in a savings account and a bigger balance, even though the second looks worse on paper.

Three to six months of essential expenses, liquid, before extra principal.

2. Higher-interest debt comes next

This one is pure arithmetic. If you carry a balance at 22% and pay extra on a mortgage at 6.25%, you are choosing a 6.25% guaranteed return over a 22% guaranteed return. You lose roughly 16 points a year on every dollar you misroute.

Pay the expensive debt first. Always. There is no version of the math where this is close.

3. Then any employer retirement match

A 50% match is an instant 50% return. A 100% match is an instant 100% return. No mortgage rate competes with that, and the match is usually use-it-or-lose-it each year.

4. Now compare your rate to the alternatives

Only once the first three are handled does the interesting comparison begin. Your mortgage rate is the hurdle any alternative has to clear — after tax, after fees, adjusted for risk.

This argument is quoted constantly and applies to far fewer people than it used to.

Mortgage interest is only deductible if you itemize. Since the standard deduction was roughly doubled in 2018, around 90% of US filers take the standard deduction and therefore get no marginal tax benefit from mortgage interest at all. If you are in that 90%, your effective rate is your actual rate: 6.25% means 6.25%.

If you do itemize, your effective rate is lower. At a 24% marginal rate, a 6.25% mortgage costs you roughly 4.75% after the deduction — which meaningfully weakens the case for prepaying. Check which camp you are in before leaning on this argument; do not assume.

Reasons to pay it off early

• A guaranteed, risk-free return equal to your rate — rare and valuable in itself.
• Enormous interest savings — $104,950 on our loan for $200 a month.
• A lower required cost of living in retirement. Removing a $2,463 monthly obligation shrinks the nest egg you need.
• Faster equity, which can end mortgage insurance sooner and provide options.
• It is psychologically real. Not owing anyone money has a value that does not appear in a spreadsheet, and people consistently report it matters more than they expected.

Reasons not to

• Illiquidity. Home equity is the hardest asset to access in an emergency.
• Opportunity cost. Over long horizons, diversified equities have historically returned more than typical mortgage rates.
• Inflation works for borrowers. A fixed payment shrinks in real terms every year you hold it.
• Concentration. Extra principal loads more of your net worth into a single, undiversified, geographically fixed asset.
• Lost tax-advantaged space. IRA and 401(k) contribution room does not roll over — an unused year is gone.

The choice is not binary, and treating it as binary is where most people go wrong. Splitting the money captures much of both.

If you have $400 a month, $200 to extra principal and $200 to investments still buys you the full result from our table — 5 years 6 months and $104,950 — while keeping half the money liquid and growing. Very few people need the maximum-payoff or maximum-investment corner of this decision.

For a full side-by-side of the same dollars in both places, including what happens to the freed-up payment after the loan is gone, see mortgage payoff vs. investing.

Rather than a verdict, here is what to answer honestly:

1. Do I have 3–6 months of expenses in cash? If no, stop here.
2. Do I have any debt above roughly 8%? If yes, that comes first.
3. Am I capturing my full employer match? If no, that comes first.
4. What is my actual rate — and my after-tax rate if I itemize?
5. How would I feel about a 30% portfolio drawdown in year three? If the answer is "I would panic and sell," the guaranteed option may genuinely suit you better regardless of expected returns.
6. How long will I stay in this house? Prepaying a loan you will exit in four years does far less than the tables suggest.