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Can somebody give a brief comparison of TSP and IRAs?
Ideally, one would contribute the maximum amount you're allowed to both the TSP and an IRA. For the 2015 tax year, that would be $18,000 for the TSP and $5,500 for the IRA (if you're 50 or older, then you can add an additional catch up amount of $6,000 to the TSP and $1,000 to the IRA). If, like most people, you cannot contribute the maximum to both, then I would recommend the TSP over an IRA, until you've maximized your TSP. Unquestionably, you should contribute at least enough to the TSP to get the maximum agency match. Beyond that, there is a case to be made to contribute to an IRA for certain investors. Benefits of TSP, compared to IRA: Benefits of IRA, compared to TSP: So, for an investor who wants simplicity, I would recommend just doing the TSP (unless you can invest more, in which case an IRA is a smart choice). For a knowledgeable and motivated investor, it can make sense to also have an IRA to gain access to asset classes not in the TSP's basic index funds.