Once you complete your in-person TSA PreCheck enrollment appointment in 2026, the vast majority of travelers receive their Known Traveler Number (KTN) via email within 3 to 5 business days. While the TSA officially states that the process can take up to 60 days if a detailed background check is required, modern digital processing has made the "one-week" turnaround the standard expectation. You can track your status online using the service provider's portal (such as IDEMIA or Telos). Once your KTN is issued, it is active immediately; you must manually add this number to your existing and future airline reservations to see the "TSA PreCheck" indicator on your boarding pass. It is a "pro-tip" for 2026 to ensure the name on your application matches your passport exactly, as any discrepancy in middle names or suffixes can lead to manual review delays that stretch the approval time toward that 60-day maximum.