Start four months early
Most lenders let you lock a rate about 120 days before your renewal date. Starting early gives you time to compare without pressure.
Switching is allowed
At the end of your term you can move to another lender without a prepayment penalty. A broker can handle the transfer and often covers the legal and appraisal costs.
Look past the rate
Compare prepayment privileges, penalty formulas and portability. A slightly higher rate with fair penalties can cost less if your plans change.