How often is a biannual flight review required after not flying for 2 years?

A biannual flight review is required every 24 calendar months to maintain a private pilot certificate, but if a pilot has not flown for 2 years, they will need to undergo a flight review before they can act as pilot in command again. The review and any associated training must be completed within that 2-year period. While the regulatory standard states that a flight review is conducted every 24 months, the context of not flying for an extended period necessitates that pilots refresh their skills to ensure safety and compliance. Thus, it would be prudent for someone returning to flying after 2 years to conduct a flight review as soon as possible rather than waiting until the end of that 2-year period. This practice emphasizes the importance of regular practice and the need for retraining after a significant break from flying.