Dear Liz: We took out parent PLUS loans to finance our two sons’ college tuition at private universities. We’ve received solicitations from a private lender offering to refinance. What are the pros and cons of doing so?

Answer: It rarely makes sense to replace federal student loans with private loans because the federal version comes with low rates, numerous repayment options, many consumer protections and the possibility of forgiveness. You lose all that when you refinance with a private loan.

Parent PLUS are a different story, however. Not only do they have higher rates (6.84% currently versus 4.29% for direct loans to undergraduates), but PLUS loans have fewer repayment options and no forgiveness.

If you have good credit and a solid employment history, you could dramatically lower your interest rate by refinancing with a private lender. Variable rates start at some lenders start under 2%, and fixed rates start under 4%. If you can’t pay the balance off within a few years, a fixed rate is probably your best option since rising interest rates could otherwise boost your payments.

A few private lenders even offer the option to have your child take over by refinancing your PLUS loan into his or her name.

You can shop for offers at Credible, a multi-lender online marketplace.