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This page was updated on April 1, 2020.

Loan interest rate for new loans is 0.875%.
Elective Deferral Limit (I.R.C. Section 402(g)): The elective deferral limit was $19,000 for 2019 and $19,500 for 2020. See the Fact Sheet  Annual Limit on Elective Deferrals.
I.R.C. Section 415(c) Limit:  The limit was $56,000 for 2019 and $57,000 for 2020. 
Catch-Up Contributions: The limit on catch-up contributions was $6,000 for 2019 and $6,500 for 2020. If you are at least age 50 (or will become age 50 during the calendar year) and if you have made or will make the maximum amount of employee contributions for the calendar year (e.g. $19,000 for 2019 and $19,500 for 2020), you may also make catch-up contributions to your TSP account. See the Fact Sheet "Catch-Up Contributions."
Annuity interest rate index: 1.700% for annuities purchased in April 2020 and 2.200% for annuities purchased in March 2020. You can also view historical annuity interest rates.
Your account balance is updated each business day. To access your account balance on this web site, you will need your TSP account number (or custom user ID) and your Web password. To obtain your account balance from the ThriftLine, you will need your TSP account number and 4-digit TSP Personal Identification Number (PIN).