Federal employees considering FERS best dates to retire 2025 should take note of September 30, 2025, which aligns with the end of the federal fiscal year. This date ensures that all performance bonuses, promotions, and salary adjustments are accounted for before retirement. Additionally, September retirees will have worked three-quarters of the year, maximizing their leave accrual and final salary calculations. Since this date aligns with federal budgeting cycles, it can also help agencies process retirement applications more efficiently. If you're looking for the best dates to retire from the federal government in 2025, September 30 is one of the most strategic financial choices.