Should You Pay Off Your Mortgage or Invest?

Compare your after-tax mortgage rate to the after-tax return you can realistically expect from investments, then let liquidity and temperament break the tie. With the average 30-year fixed rate at 6.52 percent in mid-June 2026 (Freddie Mac), and most homeowners receiving no tax benefit from their interest, paying down a mortgage is the equivalent of a riskless 6 to 6.5 percent return. Beating that after taxes requires meaningful market risk, which is why this decision is closer than it was when mortgages cost 3 percent.

What is the actual math?

The clean comparison is after-tax cost of the debt versus after-tax expected return on the alternative. Both halves are commonly miscalculated.

On the debt side, start with your rate. Freddie Mac's Primary Mortgage Market Survey put the average 30-year fixed rate at 6.52 percent for the week ending June 11, 2026. If you locked a loan in 2020 or 2021, your rate may be 3 percent or lower, and the entire analysis flips: cheap fixed-rate debt alongside invested assets is usually worth keeping.

On the investment side, be sober. Returns from a diversified portfolio are uncertain, arrive unevenly, and are taxed. A mortgage payoff, by contrast, produces a known reduction in interest expense, every year, with zero volatility. Comparing a certain 6.5 percent to a hoped-for 8 percent is not an apples-to-apples comparison; the 8 percent carries risk that the 6.5 percent does not.

Is mortgage interest even deductible anymore?

For most households, effectively no. The 2026 standard deduction is $32,200 for married couples filing jointly and $16,100 for single filers (IRS, 2026 inflation adjustments). Mortgage interest only saves taxes to the extent your itemized deductions exceed the standard deduction, and only on interest tied to the first $750,000 of acquisition debt, a limit the One Big Beautiful Bill Act made permanent.

A couple paying $20,000 of mortgage interest with modest other deductions never clears the $32,200 threshold, so their interest is effectively non-deductible and their after-tax rate equals their stated rate. High earners with large charitable gifts and the expanded SALT deduction may itemize and capture real savings, cutting a 6.5 percent rate to roughly 4.2 percent at a 35 percent marginal rate, but only on the deductible portion. Run your own return before assuming a tax benefit that may not exist. Our piece on high-income tax planning for 2026 covers the itemizing math in more detail.

A hypothetical example at today's rates

Consider a hypothetical couple, both 55, with a $500,000 mortgage balance at 6.5 percent, a $2 million taxable portfolio, and the standard deduction (so no tax benefit from interest). They are weighing whether to liquidate $500,000 of the portfolio to retire the loan.

Paying it off eliminates roughly $32,000 of first-year interest, a certain saving equal to 6.5 percent on the money. For investing to win, the $500,000 must earn more than 6.5 percent after tax. If their blended tax rate on investment returns is around 30 percent (federal capital gains plus the net investment income tax plus a state income tax), the portfolio needs roughly 9 percent before tax just to match the payoff, before counting any capital gains tax triggered by selling appreciated holdings to fund it. Long-run diversified portfolios have sometimes cleared that bar and sometimes have not, and nothing makes them do so on schedule. This example is hypothetical and ignores closing costs, PMI, and inflation effects on fixed payments, all of which can shift the result.

What does the math leave out?

Three things, and they often matter more than the spread.

Liquidity.Money sent to the mortgage company is hard to get back. Home equity can only be accessed by selling, refinancing at prevailing rates, or borrowing against the house, none of which is dependable in a crisis. A family that empties its taxable account to be debt-free has traded a visible loan for an invisible liquidity risk.

Sequence risk near retirement.Carrying a fixed payment into early retirement raises the amount you must withdraw in down markets, which is precisely when withdrawals do the most damage. Entering retirement without a mortgage lowers required cash flow and gives a portfolio room to recover. This is a strong, evidence-aligned argument for payoff in the five to ten years before retirement.

Behavior.Some people sleep better debt-free, and the value of that is real even though it never appears in a spreadsheet. Others will quietly spend the freed-up cash flow rather than invest it, which wrecks the invest side of the comparison in practice.

What do wealthy families do instead?

For balance sheets above roughly $5 million, the question often becomes less binary. Many of our clients keep low-rate mortgages indefinitely as cheap fixed-rate financing, hold one to three years of spending in a structured liquidity reserve, and leave long-term capital invested. The frame comes from goals-based allocation: the mortgage is a liability of the household, and the question is which assets should fund it and when.

Securities-based lending adds another option: borrowing against the portfolio to retire a higher-rate mortgage or to avoid selling appreciated assets and realizing gains. SBL rates float, lines can be called or margined in a severe decline, and collateralized borrowing should never be sized aggressively, but used conservatively it can bridge the gap between paying off a loan and gutting a portfolio to do it. We cover the mechanics and risks in our guide to cash management for wealthy families.

When is paying off the mortgage clearly right?

• Your rate is high relative to conservative yields, roughly 6 percent or above today, and you take the standard deduction.
• You are within ten years of retirement and want to enter it with minimal fixed obligations.
• The payoff uses surplus cash, not your emergency reserve and not heavily appreciated positions that trigger large gains when sold.
• Debt weighs on you. A plan you can hold calmly is worth more than a plan that is optimal on paper.

When your rate is 4 percent or below, you itemize, or the payoff would drain your liquidity, keeping the mortgage and staying invested is usually the stronger position.

Key numbers

Frequently asked questions

Is paying off a mortgage really a guaranteed return?It is a known reduction in interest expense at your loan rate, which functions like a riskless return on the amount prepaid. Unlike market returns, it cannot disappoint, but it also cannot exceed the rate.

Should I pay off my 3 percent mortgage?Usually not on financial grounds. Treasury bills and high-quality bonds have recently yielded more than 3 percent, so even riskless assets can out-earn that debt. Payoff at that rate is a preference decision, not a math decision.

Does paying off a mortgage hurt my credit or my taxes?The credit effect is typically minor. The tax effect depends on whether you itemize; most households take the standard deduction and lose nothing by retiring the loan.

Should I invest or pay extra principal each month?The same framework applies at small scale: extra principal earns your mortgage rate risk-free, while invested dollars carry market risk and higher expected return. Splitting the difference is a legitimate answer for households who value both progress and growth.

Is it wise to use my portfolio to pay off the house before retirement?Often, but stage it. Selling over two or three tax years can manage capital gains, and keeping an adequate liquidity reserve matters more than reaching zero debt on a particular date.