Should You Pay Off a 2.75% Mortgage Early? It Depends on the Cash Left Behind

A reader with a $300,000 mortgage at a 2.75% interest rate wants to pay it off in full using cash the couple has set aside. Her reasoning is simple: she does not want to enter retirement owing six figures when the money to clear the debt is already available. Her husband thinks she is being unreasonable, because a rate that low is cheap debt. Each of them has a real point.

The case for keeping the loan is mostly about opportunity cost. At 2.75%, the mortgage costs less than inflation has historically run over long stretches, and cash invested in a diversified portfolio has the potential to earn more over time. Stock returns are not guaranteed, though, and they can fall sharply in the years a retiree most needs them. Mortgage interest may also be deductible for households that itemize, which lowers the effective rate somewhat, although the higher standard deduction means fewer households benefit from that now.

The case for payoff is about certainty and cash flow. Every dollar used to retire the loan earns a guaranteed return equal to the rate avoided, and the household loses its biggest fixed monthly bill. Many people approaching retirement place a high value on that predictability, especially if their income will come from savings, pensions or Social Security rather than a steady paycheck. Being free of a mortgage can also make it easier to live on less during a market downturn.

The biggest risk in either direction is liquidity. Paying off a loan with money that was meant for emergencies can leave a household short if a roof fails, a family member needs help or a health issue arises. Financial planners generally recommend keeping several months of expenses in accessible cash, and the right amount depends on the couple's spending, income and health. The type of account matters too. Cash in a taxable brokerage account and money in a retirement account carry different tax consequences when withdrawn.

Neither spouse is clearly right in the abstract. Before deciding, the couple should check how much cash would remain after the payoff, whether they are on track for their retirement savings goals, and how the monthly payment fits their budget. A fee-only financial planner can run those numbers using the couple's actual tax situation. The more productive conversation may be about what each person wants retirement to feel like, since that goal should guide the choice more than the interest rate alone.