what is the maximum i can contribute to tsp?
2019 Thrift Savings Plan Contribution Limits The maximum amount you can contribute to a TSP account for this year is $19,000, an increase of $500 from 2018. If you're 50 or older, your plan may allow you to contribute an additional $6,000 as a catch-up contribution, bringing your 2019 TSP contribution total to $25,000.