Entry № 20 · logged Oct 8, 2026Free, no sign-upMoney · Home
Refinancing into a 15-year mortgage
This is the refinance that moves the payment the wrong way on purpose. A shorter term almost always carries a lower rate, and the combination attacks the interest line instead of the payment line. The payment goes up; everything else gets better.
The trade, worked out
Computed for a $300,000 balance with 25 years remaining at 7.5%, refinanced to a 15-year loan at 6.0% with $6,000 in closing costs — net of costs, the refinance still saves $203,409 in interest. The home is free and clear in 2041 instead of 2051.
Who this fits
- Income has grown since the original loan. The classic case: you bought at the edge of affordability five years ago and the $315-a-month increase is now comfortable.
- You want the debt gone, not just cheaper. Every year of a 15-year loan amortizes faster; by year 5 the balance is falling noticeably while a 30-year loan is still mostly interest.
- Retirement is in sight. Entering retirement with no mortgage payment is worth more than a slightly lower payment with the balance still there.
The honest risk
The higher payment is an obligation, not an aspiration. Lose the income and the 15-year payment is harder to make than the 30-year one would have been. If the $315 increase would strain the budget, the safer play is a same-term refinance at the lower rate and prepayments you can stop — the interest savings are smaller, but so is the risk.
All figures computed for a $300,000 balance, 25 years remaining, current rate 7.5%, refinance rate 6.0% on a 15-year term. The 15-year rate runs below the 30-year rate in normal markets; your quoted spread decides the exact numbers.
Common questions Form RF-20
How much interest does refinancing to a 15-year mortgage save?
On $300,000 at 7.5% with 25 years left, moving to a 15-year loan at 6.0% saves $209,409 in interest -- $203,409 after $6,000 in closing costs -- and the loan ends 10 years sooner.
How much higher is the payment on a 15-year refinance?
For the $300,000 example: $2,532 a month versus $2,217 now -- about $315 more a month. The payment rises because the balance is paid off in 15 years instead of 25.
Is a 15-year refinance risky?
The obligation is real: the higher payment is due every month whether income cooperates or not. If the increase strains the budget, a same-term refinance plus voluntary prepayments is the safer version of the same idea.