For 2023, the maximum TSP contribution for federal employees and active-duty service members is $22,500. This represents a $2,000 increase from 2022. Your plan might let you make an extra $7,500 "catch-up" contribution if you're 50 or older. Therefore, you are able to make a total contribution of $30,000 In 2023.
Active military personnel deployed to combat areas and receiving tax-free income are eligible to make contributions up to $66,000. From 2022, this has grown by $5,000.