Today's mortgage refinance rates have risen with the 30-year fixed refinance rate at 6.72% and the 15-year fixed rate at 5.62%.The average interest rate for a 20-year mortgage refinance stands at 6.46%.The APR on a 30-year fixed-rate mortgage is now 6.75%, up from last week's 6.63%.Borrowers with a $100,000 30-year fixed-rate mortgage will pay about $646 per month in principal and interest.For a 20-year fixed refinance mortgage, the monthly cost in principal and interest would be around $743.A 15-year fixed-rate mortgage refinance at today's rate would cost $823 per month.Jumbo mortgage refinance rates have also increased, with the 30-year rate at 7.1% and the 15-year rate at 6.18%.Refinancing can help lower interest rates, reduce monthly payments, or pay off the loan faster.Consider the break-even point to determine if refinancing is beneficial, factoring in closing costs and monthly savings.Check your estimated loan's APR to compare additional fees and interest charges for different refinance options.