A license, once granted, is good forever (barring some enforcement action).
But you need more than just a license to fly. To use your license while flying solo, you also need a Medical Certificate (if required by the aircraft or flight rules) and a Current BFR (Biennial Flight Review).
Medical Certificates are good for five years until you’re 40, then for two years. They require a quick trip to an FAA-approved doctor to examine you for any obvious medical conditions.
A BFR is a review with an instructor every two years to ensure you’re still proficient and safe. If all goes well, it takes about 90 minutes.
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