Should you pay off your mortgage before retiring?
Paying off the mortgage feels right. Often, mathematically, it's not. Sometimes, behaviorally, it absolutely is. Here's how I help couples sort through it.
Few financial questions generate more household disagreement than 'should we pay off the mortgage before retiring?' One spouse pictures a paid-for home with no monthly obligation. The other runs a spreadsheet showing the 3% mortgage interest is cheaper than the 6% expected portfolio return. Both arguments have merit. The right answer for most couples is neither pure math nor pure feelings — it's a specific plan that reflects who you are.
The cash-flow argument for paying it off
A paid-for home removes the largest fixed monthly expense from your retirement budget. That reduces sequence-of-returns risk — you don't need to sell investments to make a mortgage payment in a market downturn. It reduces income needs, which can keep you in a lower tax bracket and below IRMAA tiers. And it gives most retirees a measurable peace of mind that isn't visible on any spreadsheet.
The math argument against paying it off
If your mortgage rate is locked at 3% or 4% and your portfolio's expected return is 6–7% over 20+ years, the gap is real money. Paying off a $300,000 mortgage with portfolio assets surrenders the spread, plus the tax-deferred growth you would have earned in the meantime. For high-net-worth households, the difference compounds into hundreds of thousands of dollars over a thirty-year retirement.
What's changed since 2018
The Tax Cuts and Jobs Act raised the standard deduction so high that most retirees no longer itemize. That means the mortgage interest deduction often provides zero tax benefit — the math case for keeping the mortgage is weaker than it was a decade ago. Run your last two tax returns. If you took the standard deduction both years, the 'mortgage tax shield' argument doesn't apply to you.
The liquidity question
Paying off the mortgage converts a liquid asset (cash or investments) into illiquid equity in your home. Need that money back? Cash-out refinancing in retirement is harder; reverse mortgages have their own complications; selling and moving is rarely the answer. Make sure you have substantial liquidity remaining — six to twelve months of expenses in cash, plus your portfolio — before writing the payoff check.
Texas property taxes change the picture
Texas has no state income tax but some of the highest property taxes in the country (2–3%+ of assessed value in many counties). Paying off the mortgage doesn't reduce that. A retired Houstonian with no mortgage but $15,000/year in property tax + insurance still has a meaningful housing cost. Plan around that line — not just the mortgage line.
When I lean toward paying it off
When the remaining mortgage balance is small enough that paying it off doesn't materially affect portfolio sustainability. When one or both spouses have high anxiety about debt. When the household has substantial taxable assets and the payoff comes from cash (no tax cost). When the mortgage rate is above 6% and not refinanceable.
When I lean against paying it off
When the mortgage rate is below 4%. When the payoff would require liquidating tax-deferred accounts (the income tax on the withdrawal is often larger than the mortgage savings). When portfolio sustainability would meaningfully weaken. When one or both spouses doesn't have it as a personal priority.
A compromise that often works: pay extra principal monthly rather than a lump-sum payoff. Retire the mortgage faster without surrendering liquidity. Behavior and math both get half their wish.