Most homeowners' first move at renewal is opening the letter their current lender mails them. That letter is convenient, not competitive. It's built to keep you exactly where you are, at a rate that's rarely their best offer. Shopping ahead of it is what actually gets you a better deal, and the timeline matters more than most people realize.
Why Your Lender's Letter Isn't the Starting Point
Renewal letters typically land 90–120 days before your maturity date, offering a rate that's often a "posted" rate rather than what that same lender would negotiate if they knew you were comparing offers. Lenders count on inertia, most people simply sign and send it back. The ones who don't almost always get a better number, either from the same lender or a different one.
The Realistic Timeline
120 Days Out
Start looking. You don't need to commit to anything yet, but this is when it's worth knowing your mortgage balance, your maturity date, and getting a sense of where rates sit. This is also the point where a rate hold becomes useful, it locks in a number while you keep comparing.
90 Days Out
Your current lender's renewal letter typically arrives around now. Treat it as one option on the table, not the offer. This is a good time to get pre-approved with at least one other lender so you have a real comparison, not a guess.
60 Days Out
Decide. If you're switching lenders, this gives enough runway for the new lender's paperwork, appraisal (if needed), and legal work to close cleanly on your maturity date without a gap.
30 Days Out
Final documents and closing prep. If you haven't acted by now, you're cutting it close, most lenders need at least a few weeks to fund a switch by your actual renewal date.
Renewal Date
If you've done nothing, most lenders auto-renew you into a new term at their posted rate. It's not a penalty, but it's rarely your best number, and by this point your negotiating leverage is gone.
Switching Lenders vs. Staying, Does It Cost You Anything?
This is the detail that stops a lot of people from even shopping: switching lenders at renewal is not the same as breaking your mortgage mid-term. Since your term is actually ending, there's generally no prepayment penalty for moving to a new lender at maturity, you're not breaking a contract, you're simply not renewing it with the same one. There may be minor legal and discharge fees, which a competing lender will sometimes cover to earn your business.
What If You Want to Change More Than the Rate?
Renewal is also the natural point to revisit anything else about your mortgage, switching from variable to fixed, changing your amortization, or increasing your payment frequency. Bundling those changes into your renewal, rather than doing them separately later, is usually the cleanest way to make them.