Mortgage Rates Reach a Nearly 3-Year Peak, and Downsizing Could Leave Retirees Paying More Each Month

Quick Read

• A $250,000 mortgage at 7.4% costs $466 more per month than a $300,000 loan at 3%, proving interest rate matters more than loan size.

• The projected 2027 Social Security COLA adds only $70 to a $2,000 benefit, nowhere near enough to offset higher mortgage payments from downsizing.

• Retirees should compare full monthly costs, calculate realistic sale proceeds, and consider paying cash or staying put to keep a low locked-in rate.

• Are you ahead, or behind on retirement? SmartAsset's free tool can match you with a financial advisor in minutes to help you answer that. Each advisor has been carefully vetted, and must act in your best interests. Don't waste another minute; learn more here.

Mortgage rates have risen to their highest point in nearly three years, with Freddie Mac putting the average 30-year loan at 7.4%. For retirees thinking about downsizing, that shift could turn a money-saving move into a more expensive one than expected.

Imagine a retiree living in a four-bedroom home with a 3% mortgage locked in years ago. The children have moved out, maintaining the yard is becoming a hassle, and a newer, smaller house seems like an easy way to reduce monthly expenses. But swapping the old loan for a new one could leave less room in the budget, even after moving to a smaller property.

How a Smaller Mortgage Can Lead to a Bigger Payment

Take a $300,000 mortgage at 3%. On a 30-year term, principal and interest would run about $1,265 a month.

Now cut the loan amount to $250,000, but raise the rate to 7.4%. The monthly payment climbs to about $1,731.

That means paying roughly $466 more each month, or close to $5,600 more a year, even though the loan is $50,000 smaller. The exact payment will vary based on your remaining balance, the years left on your current mortgage and how much cash you put down on the new home. Still, the lesson is the same: the interest rate has a much bigger effect on the payment than the loan size.

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Why Downsizing Can Put Pressure on a Social Security Budget

Social Security’s annual cost-of-living adjustment, or COLA, is tied to inflation in everyday expenses. It does not account for the fact that someone may have traded a 3% mortgage for one near 7%. The 2027 increase is currently projected at about 3.5%.

On a $2,000 monthly benefit, that would amount to about $70. It is helpful, but nowhere close to covering an extra $466 in mortgage costs each month. That raise also has to absorb other rising expenses, including groceries, utilities and Medicare premiums.

Then there are the costs many homeowners overlook. A house in a new subdivision may come with property taxes based on today's value, higher insurance bills and homeowners association fees that an older home never had. Selling costs can also reduce the equity you expected to use to make the smaller house affordable.

Taxes may change as well. For example, if you withdraw an additional $4,800 a year from a traditional IRA to cover the higher payment, that money counts as income. It can also cause more of your Social Security benefits to become taxable. In other words, a bigger housing bill can lead to a bigger tax bill too.

Three Calculations to Make Before Listing the House

1. Compare the full monthly cost of staying versus moving by including principal, interest, property taxes, insurance, association dues and expected maintenance for both homes. A newer, smaller home may save on repairs and utilities, so factor those savings in as well.

2. Figure out what you would actually net from the sale by starting with a realistic price, then subtracting agent commissions, closing costs and your mortgage balance. With home sales slow and buyers dealing with higher borrowing costs, a quick sale at full asking price is not guaranteed.

3. Consider alternatives to taking on a large new loan. A bigger down payment lowers the balance. Paying cash eliminates it entirely. Staying put preserves your 3% rate. Just be careful not to drain your savings to buy outright. Clark Howard told one caller considering paying off a mortgage, "I don't want you to end up so cash thin that you don't have any financial cushion at all."

Your Existing Rate May Be Worth More Than Extra Space

The least expensive home in retirement may be the one that comes with the mortgage rate you already have. If the smaller house still wins after the numbers are crunched, the move can make sense. If its only real advantage is less square footage, the larger house may actually be the better bargain.

Your loan balance, local market conditions and the amount of savings you want to preserve can all change the answer, so it is worth running the figures yourself before putting the home on the market.