Question: is a tsp a 403b?
Answer: While the TSP isn't technically a 401k, it is a defined contribution plan just like a 401k (and a 403b for that matter). ... Limits on TSP contributions are equivalent to those for 401(k) plans. For 2019, that amount is $19,000 plus an additional catch-up contribution of $6,000 for employees age 50 or older.