July 26, 2026 · 5 min read
A pre-approval letter issued in March gets treated like a fixed document for the rest of the buyer's search, but the numbers behind it are anything but fixed. Rates move. A buyer opens a store card to furnish a house they haven't found yet. A bonus gets deferred, a car payment starts, a credit inquiry knocks a few points off a score. Ninety days later that letter still says exactly what it said in March, and nobody who's supposed to be watching the clock actually is.
Most pre-approvals carry a 60 or 90 day shelf life buried in the fine print, but that date lives on a piece of paper, not on anyone's calendar. A loan officer managing thirty or forty active files isn't tracking individual expiration dates unless something is doing that tracking for them. The borrower assumes the letter is good until someone tells them otherwise, and in a lot of pipelines nobody ever does.
Buying power doesn't expire on a fixed schedule so much as it erodes in real time. A rate lock that made a $450,000 purchase comfortable in April can price the same buyer out of that range by June if rates move half a point. A new credit inquiry from a furniture run drops a score ten points right before it matters most. None of that triggers a phone call unless the loan officer happens to re-pull credit, and most don't until the file is already under contract and underwriting asks for updated documentation.
A stale letter rarely announces itself early. It shows up when the buyer is in a multiple-offer situation and the agent is representing a number that no longer holds, or when the file lands on an underwriter's desk and the debt-to-income ratio has shifted enough to require a fresh approval mid-escrow. At that point it stops being a paperwork detail and becomes a timeline problem that touches the agent, the seller, and a closing date everyone already committed to.
The fix sounds simple: check in with each pre-approved buyer at a set interval and re-verify the numbers before the letter gets used to write an offer. The reason it doesn't happen consistently is volume. A loan officer's pipeline mixes buyers actively shopping this weekend, buyers who went quiet two months ago, and buyers who found a house last Tuesday. Sorting that list by whose approval is closest to expiring is a task that gets pushed down the queue every day, because nothing forces it to the top until a deal is already at risk.