Tax Benefits: As a qualified plan, contributions to your TSP are tax-deferred, meaning you don't pay taxes on the money until you withdraw it in retirement
Contribution Limits: The TSP follows the same contribution limits as other qualified plans like 401(k)s. For 2025, the limit is $23,500 ($23,000 in 2024), with an additional catch-up contribution of $7,500 for those aged 50 and older and $11,250 for 60-63 year olds.
Withdrawal Rules: Withdrawals from your TSP are subject to income tax, and early withdrawals (before age 59½) may incur a 10% penalty unless an exception applies
For more details on TSP contributions and withdrawals, you can visit the TSP official website