Here Is What I’ll Tell a 66-Year-Old Couple Who Will Retire With $310,000 Saved, $4,100 a Month in Social Security and a $1,400 Mortgage Payment

A $310,000 IRA and $4,100 a month in Social Security sounds like a comfortable retirement, but one common move this couple might consider could trigger a five-figure tax bill and quietly undermine everything they have built.

Published October 18, 2026, 10:15am ET · 4 min read

This post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them.

Senior couple, retirement and writing documents of investment report, financial assets or sign legal contract of insurance policy. Man, woman and paperwork for budget, pension savings or loan at home
© PeopleImages / Shutterstock.com

Imagine a 66-year-old husband and his 64-year-old wife preparing to retire. The couple has approximately $310,000 in IRAs and $140,000 left on a 3.25% mortgage. The payment is $1,400 a month, with nine years left. His Social Security will be $2,500 when he claims at 67. She took $1,600 at 64.

Plenty of couples are in this spot: a solid Social Security income, small savings and a cheap mortgage that still feels like a weight. Suze Orman took almost the same question from a 61-year-old caller who was weighing a $130,000 IRA withdrawal to pay down her mortgage so she and her husband could retire debt-free. Here are the seven things I’d tell this couple.

Keep the 3.25% Mortgage

Every dollar you withdraw from a traditional IRA counts as taxable income. If they take out $140,000, plus enough to cover the tax, in a single year, they would land in the 22% bracket, which starts above $100,800 of taxable income for joint filers in 2026. It would also put them far past the $44,000 adjusted base amount, so up to 85% of that year’s benefits would become taxable. On top of that, the new $6,000 senior deduction phases out above $150,000 of joint modified AGI.

They would face a five-figure tax bill to pay off a loan at 3.25%, while the 10-year Treasury yields 5.10%. That cheap debt works in their favor.

Her Early Claim Deserves a Second Look

Her $1,600 at 64 compares with about $1,900 at 67. Covering those three years from savings would cost $57,600. That only pays off if she lives well past 80.

Survivor benefits hurt the case for waiting even more. If he dies first, she moves up to his $2,500 check and her own benefit goes away. If she dies first, her check stops either way. A bigger benefit for her only helps while both of them are alive. For most couples in this position, her claim should stand.

A 4% Withdrawal Keeps Federal Tax Near Zero

Taking 4% a year works out to roughly $1,033 a month, which brings gross income to about $5,133. Their Social Security alone is already above the $3,355 average for an aged couple after the 2027 COLA.

Provisional income is half of Social Security plus all other income. For them, it comes to about $37,000. The joint base amount is $32,000, so only about $2,500 of benefits become taxable. Even adding IRA withdrawals, the total still falls below the $32,200 standard deduction for 2026, before the senior deductions even count. Their federal income tax is close to zero.

A $1,400 Raise Arrives at 75

The mortgage is paid off when he turns 75, and their monthly costs drop by $1,400. That raise comes soon after required minimum distributions begin at age 73, and just as healthcare costs usually start rising. Waiting it out pays them back.

Park $25,000 Where It Earns Something

They should hold $25,000 in cash for roofs, cars, and dental bills, so a bad market year never forces them to sell IRA holdings at a loss. Shop for a good rate. The national average 12-month CD pays 1.73%, and top online banks routinely pay 3 to 5 times the average. The interest counts toward provisional income.

One Death Changes Everything

This is their biggest risk. When the first spouse dies, only the larger check continues. The household loses $1,600 a month, about 31% of its income, overnight. The mortgage, property taxes and utilities stay the same.

Taxes rise too. A surviving spouse who files single gets a base amount of $25,000 instead of $32,000, so more of the remaining benefit becomes taxable. They should build a budget that works on $2,500 a month plus IRA withdrawals while the mortgage is still being paid. If it doesn’t work, they should decide now whether the survivor would shrink.

Skip Roth Conversions

Converting to a Roth makes sense when you expect to pay a higher tax rate later. This couple pays almost nothing today. A $310,000 IRA drawn down at 4% won’t grow into a big RMD problem. Each converted dollar also adds to provisional income, which makes more of their Social Security taxable. At this income level, the numbers rarely favor converting.

Where to Start This Month

First, run the survivor budget. That one test shows whether the plan holds up. Second, avoid the most expensive mistake on this list: draining the IRA to pay off a 3.25% mortgage.

A one-time, flat-fee session with a planner who charges only fees is worth it for one reason. The planner can model the surviving spouse’s income, taxes, and housing costs year by year after the first death, and that case decides whether this retirement works.

Contact [email protected] for any questions or corrections.

David Beren

David Beren has been a Flywheel Publishing contributor since 2022. Writing for 24/7 Wall St. since 2023, David loves to write about topics of all shapes and sizes. As a technology expert, David focuses heavily on consumer electronics brands, automobiles, and general technology. He has previously written for LifeWire, formerly About.com. As a part-time freelance writer, David’s “day job” has been working on and leading social media for multiple Fortune 100 brands. David loves the flexibility of this field and its ability to reach customers exactly where they like to spend their time. Additionally, David previously published his own blog, TmoNews.com, which reached 3 million readers in its first year. In addition to freelance and social media work, David loves to spend time with his family and children and relive the glory days of video game consoles by playing any retro game console he can get his hands on.

All articles →