**Information about current loan:**

Amount left: $102,000

Term: 28 years left on 30 year

Rate: 4.125%

Monthly Principle/Interest Payment: $531

**Refinance estimates:**

Loan amount: $102,000

Term: 15 year

Rate: 3-3.625% (Hoping closer to 3% considering my excellent credit score)

Estimated closing costs: $2900

Estimated monthly payment: $735

At my current rate (4.125%), I feel like I'm right on the edge of if it's better to pay down the principle or invest my excess cash. So by refinancing, I'd be saving a bunch of interest in the long run, but I don't know if it's worth it, because I'd have to divert a portion of retirement savings towards the increased monthly payment on a 15 year. Opinions?