It seems like a no-brainer. “Why pay $20,000 in interest to get $6,600 back from the IRS?” But the tradeoffs may not be so obvious if you’re nearing, or already in, retirement. How much longer are you going to stay in the house? How balanced is your portfolio? How much would you have to pay in capital gains now vs. how much will you save in capital gains and income tax by not needing to withdraw as much during retirement? CNBC just released a special report that looks at when it might make sense, and when it might not, including commentary from several CFPs.