That's just perspective. The loan is 30 years. The monthly payment never changes right? So you can think of monthly payments as flat principle + interest that's

That's just perspective. The loan is 30 years. The monthly payment never changes right? So you can think of monthly payments as flat principle + interest that's constant. It's the same thing. The only difference is in taxes. If you refinance your monthly rate goes down. And you get a tax break.