A US couple deciding whether to refinance a 30-year mortgage

Situation

A couple in Austin holds a $420,000 balance at 7.1% with 27 years remaining on the original 30-year term.

Their lender offers a 5.9% refinance over a fresh 30-year term with $9,400 in closing costs rolled into the loan.

The headline 'save $340 a month' hides two things: the term resets, and the closing costs must be earned back.

What they calculated

Inputs used

Current balance

$420,000

Current rate

7.10%

Remaining term

27 years

Offered rate

5.90%

New term options

30 years or 25 years

Closing costs

$9,400

Expected time in home

9 years

The numbers

• Current payment on $420,000 at 7.1% over 27 remaining years is about $2,865 a month.
• Refinancing to 5.9% over a fresh 30 years gives about $2,510 — a $355 monthly saving, but three extra years of payments.
• Refinancing to 5.9% over 25 years gives about $2,687, saving $178 a month and finishing two years earlier.
• At $9,400 in closing costs, the 30-year option breaks even in month 27 and the 25-year option in month 53.
• Lifetime interest: $508,300 on the current loan, $483,600 on the 30-year refinance, $446,500 on the 25-year refinance.
• Investing the $355 saving at 7% for the nine years they expect to stay compounds to roughly $53,000.

Outcome

The 25-year refinance was the better structure: it keeps the payoff date close to the original while capturing most of the rate drop.

Because they expect to stay nine years, both options clear break-even comfortably — the decision was term discipline, not break-even risk.

They chose the 25-year term and set up an automatic $175 extra principal payment, pulling payoff forward by a further 22 months.

Questions this raises

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