Almost every week, someone sits down with me and asks a version of the same question. They are a few years from retiring, they still owe money on the house, and they want to know whether to write one big check and be done with it.
This isn’t a fringe problem. Between 1989 and 2022, the share of homeowners aged 65 to 79 carrying a mortgage or home equity debt on their primary home climbed from 24 percent to 41 percent, according to Harvard’s Joint Center for Housing Studies. Over that same stretch, the median amount owed rose from $21,000 to $110,000, both measured in 2022 dollars.
The honest answer to the question about paying off your mortgage is that it depends. The good news is that what it depends on can be measured. Let’s walk through it.
Start With the One Number That’s Guaranteed
Paying off a mortgage is an investment. The return is your interest rate, and unlike almost anything else you can buy, that return is certain. Retire a loan charging 6.5 percent, and you have earned 6.5 percent.
One qualification matters. If your mortgage interest produces a deduction, your true cost is lower than the rate on the note. How much lower depends on how much of the interest is actually doing work, which is rarely all of it. I walk through that math below. For many retirees, the answer lands close to the full rate.
That gives you the right yardstick, and the comparison has to be after tax on both sides. A ten-year Treasury pays about 5.2 percent as of this writing in early October 2026. Held in a taxable account by a couple in the 22 percent bracket, it nets roughly 4.1 percent. The average thirty-year mortgage is running near 7.3 percent.
So the hurdle is higher than it first appears. To beat a 6.5 percent payoff, an investment has to net 6.5 percent after tax. In a simplified example where the entire return is subject to a 15 percent tax drag, the investment would need to earn about 7.6 percent before tax. If the entire return were taxed annually at 22 percent, it would need to earn about 8.3 percent.
A 3 Percent Mortgage is Different from a 7 Percent One
This is where blanket advice falls apart.
Picture a $220,000 balance with twenty years left. At 3 percent, the payment is about $1,220 a month, and you will pay the lender roughly $73,000 in interest. At 7 percent, the payment is about $1,706, and the interest runs about $189,000.
Same house, same balance, more than $116,000 apart.
If your rate starts with a 3, keeping the loan is easy to defend. For a couple in the 22 percent bracket, today’s Treasury yields can still exceed that rate even after federal tax, without touching the stock market. If your rate starts with a 6 or a 7, you have to take additional risk to come out ahead, and you have to be right about it.
The Tax Break is Smaller Than Most People Think
Clients often tell me they keep the mortgage for the deduction. That argument was stronger twenty years ago.
For 2026, the standard deduction is $32,200 for a married couple filing jointly. Couples where both spouses are 65 or older add $1,650 each, which lifts the figure to $35,500.
Here is the part that gets explained badly almost everywhere. Clearing that bar is not a switch that flips. Only the deductions stacked above the standard deduction do any work, so most people who itemize get a partial benefit rather than a full one.
Work it through. Our couple pays $14,137 of mortgage interest in the first year, and they have $28,000 of property taxes and charitable gifts. Their itemized total is $42,137, which beats the standard deduction by $6,637. That $6,637 is the only piece of the interest that changes their tax bill. At a 22 percent rate, it saves them about $1,460, which is a 10 percent subsidy on $14,137 of interest, not a 22 percent one. Their real mortgage rate is roughly 5.83 percent in year one. It drifts back toward 6.5 percent as the loan amortizes, because each year less interest clears the bar. By year fourteen, the mortgage interest has fallen enough that their total itemized deductions no longer exceed the standard deduction, so the interest produces no additional federal tax benefit. A full deduction would have made that first-year rate 5.07 percent. Doing nothing at all leaves it at 6.5 percent.
Most retirees land somewhere in that range, and many land at the top of it, especially once the loan is older and the interest portion has shrunk. Ask your tax preparer where you actually sit before you assume the deduction is doing much.
Where the Money Comes From Can Cost More Than the Interest
Here is the part that surprises people.
If the payoff money sits in a taxable account, the tax cost is usually lower, since you only owe tax on the gains, often at long-term capital gains rates. Cash or holdings with little appreciation are the cleanest source. Selling highly appreciated stock can still create a meaningful tax bill. If it sits in an IRA, every dollar you pull out counts as ordinary income, and the bill compounds in ways most people do not see coming.f it sits in an IRA, every dollar you pull out counts as ordinary income, and the bill compounds in ways most people do not see coming.
Take a couple, both 66, with $80,000 of income before any withdrawal. After the $35,500 standard deduction and the $12,000 senior deduction, their taxable income is $32,500, and their top dollars are taxed at 12 percent.
Now they pull $220,000 from the IRA. Income jumps to $300,000. The senior deduction, which phases out above $150,000 of income, shrinks from $12,000 to $3,000. Taxable income becomes $261,500, the top dollars land in the 24 percent bracket, and their federal tax rises by $44,552. That is a 20 percent haircut, and it comes from a couple whose ordinary bracket is 12 percent.
It gets worse, because $220,000 out of the IRA does not put $220,000 on the closing table. To net the $220,000 they actually need, they have to withdraw about $279,600 and hand roughly $59,600 to the IRS. The gross-up is the number people forget, and it is nearly $60,000.
Two years later, Medicare notices. Surcharges begin once a couple’s income tops $218,000. That threshold is a cliff, not a ramp. One dollar over the line triggers the full surcharge for that tier. A couple pushed into the $274,000 to $342,000 range would pay about $5,800 in extra premiums, assuming both spouses are enrolled in Part B and Part D. That figure is a one-year surcharge tied to the year of the withdrawal, not a permanent increase. Grossing up makes it worse. Withdrawing $279,600 lifts income past $342,000, which lands the couple in the next tier and closer to $9,200 for the year.
Timing fixes much of this. By the end of year three, the balance is down to $202,200, so that is what they need to accumulate. Withdrawals of roughly $77,800 a year get them there, keep the couple in the 22 percent bracket, preserve most of the senior deduction, and hold their income under the IRMAA line entirely. Federal tax falls to about $31,200, roughly $28,400 less than the lump sum.
That $28,400 is a federal income tax figure and nothing more. It does not count state income tax, which may widen the gap depending on where the couple lives and how that state taxes retirement distributions. It does not count the $9,200 of Medicare surcharges the slower path avoids, which also widens the gap. Working the other way, waiting three years to retire the loan means three more years of interest, roughly $41,300 in our example. The tax saving is real. The total economic answer depends on which of those pieces apply to you.
There is a flip side, and it is the strongest argument in favor of paying off. Erasing a $19,683 annual payment means you need that much less out of your accounts every year for as long as the loan would have run, which here is twenty years, to age 82. Two decades of lower withdrawals can hold you under a tax or Medicare threshold year after year. The relief is not permanent, since the loan would have ended anyway, though it is worth far more than a one-time saving.
Three Paths, Side by Side
Here is the same $220,000 loan at 6.5 percent, twenty years remaining, modeled three ways. The portfolio rows assume that $220,000 either retires the loan or stays invested and covers the payments as they come due.
Two notes on the returns. They are after tax, so the 6.5 percent line means 6.5 percent in your pocket, which at a 15 percent tax drag takes about 7.6 percent before tax. They are also true annual returns, not annual rates chopped into twelve monthly pieces. This table isolates the mortgage and investment comparison. It does not include income taxes or Medicare surcharges caused by withdrawing payoff money from a tax-deferred account.
| Pay off at 62 | Carry into retirement | Pay off at 65 | |
| Lump sum withdrawn | $220,000 now | $0 | $202,200 in three years |
| Mortgage payment in retirement | None | $1,640 a month | $1,640 until 65, then none |
| Interest paid from age 62 on | $0 | $173,700 | $41,300 |
| Portfolio at 82, 5% annual after-tax return | $0 (baseline) | $81,900 behind | $25,200 behind |
| Portfolio at 82, 6.5% annual after-tax return | $0 (baseline) | $11,500 behind | $3,800 behind |
| Portfolio at 82, 6.70% annual after-tax return | $0 (baseline) | Break-even | Break-even |
| Portfolio at 82, 8% annual after-tax return | $0 (baseline) | $92,100 ahead | $32,200 ahead |
| Fits best when | The rate is high and the payoff money is already taxable | The rate is low and the portfolio nets more than 6.70% after tax | You want time to spread an IRA withdrawal across tax years |
That distinction is why the break-even sits at 6.70 percent rather than 6.5 percent. A mortgage quoted at 6.5 percent compounds monthly, so it actually costs 6.70 percent a year. Your portfolio has to clear the real cost, not the number on the note. Miss that, and you will think you are even when you are $11,500 behind.
Read the portfolio rows closely, because they are the whole argument. Below 6.70 percent, carrying the loan leaves you behind, and a number in the behind column means the invested money ran short before the loan was repaid, so the rest of the payments had to come from somewhere else. Above 6.70 percent, carrying wins, and it wins by real money.
Notice what waiting costs, too. Those thirty-six payments send about $41,300 to the lender and reduce the balance by only about $17,800. With twenty years still to run, most of those first three years of payments are rent on the money rather than repayment.
The Part a Spreadsheet Can’t Measure
Every client who has paid off a mortgage has told me some version of the same thing. The house feels different. They stop watching the market so closely.
That feeling is consistent with research showing an association between substantial mortgage debt and lower financial well-being. Harvard’s Joint Center for Housing Studies examined survey data from the Consumer Financial Protection Bureau and found that older homeowners carrying at least $50,000 in mortgage debt scored measurably lower on financial well-being. High mortgage debt nearly doubled the odds of being financially insecure. That held even after accounting for income, savings, and home value.
A fixed monthly obligation in retirement isn’t just a line item. It is a bill that keeps arriving whether or not the market cooperates, which is exactly the risk that hurts a portfolio most in the first years after you stop working.
The opposite risk deserves respect too. Home equity isn’t spendable. Once that money is in the walls, getting it back means selling, borrowing, or qualifying for a loan on retirement income. I have never seen anyone regret keeping a healthy cash reserve.
What Actually Decides It
Six things, in roughly this order. Your interest rate compared with what safe money nets after tax. Whether the payoff dollars are taxable or tax-deferred, and what the gross-up costs if they are not. How much cash you keep after the check clears. Whether the lower withdrawal keeps you under a tax or Medicare threshold. How long you plan to stay in the house. How much a debt-free retirement is worth to you personally.
That last one isn’t a tiebreaker. For plenty of people it’s the whole answer. There’s nothing unsophisticated about that.
Run your own numbers before you decide, or let us run them with you. The right answer is specific to your rate, your accounts, and your temperament, and it is usually clearer than people expect once it is written down.
