As a veteran with an unused VA approval letter, will not using it count against me if I reapply?

No. An unused approval leaves no mark against you, and nobody tracks that you didn't use it. Getting pre-approved and then not finding a home is completely ordinary. The VA, the lender, and sellers neither know nor care that you were approved once and didn't move forward. Your VA entitlement is fully intact, and reapplying later is routine. The one mechanical detail worth knowing involves the credit pull rather than the approval itself. Under agency age-of-document rules, a credit report is only good for roughly 120 days measured to the date you sign the new loan, with the exact shelf life varying by program. Come back after that window and the lender pulls credit again, which adds an inquiry to your report. That effect is minimal, especially against the backdrop of a mortgage-sized decision. So reapply whenever you're ready to shop again. The practical step is simply refreshing the file: updated income documents, current assets, and a fresh credit pull, so your numbers reflect where you stand today. When you're ready to run those numbers, we're glad to help.