A TSP calculator projects how much you could have in your Thrift Savings Plan at retirement. The TSP is the retirement savings plan for federal employees and members of the uniformed services, similar to a 401(k). Enter your salary, contribution percentage, current balance, expected return and years until retirement, and it estimates your future balance.
A key factor is the agency match. For employees under the Federal Employees Retirement System (FERS), agencies automatically contribute 1 percent of basic pay and match additional contributions up to a total of 5 percent when you contribute 5 percent. Contributing at least 5 percent gets you the full match, which is free money. Members of the uniformed services under the Blended Retirement System have a similar matching structure.
Example: if you earn $60,000 and contribute 5 percent ($3,000 a year) with a 5 percent agency total ($3,000), you’re saving $6,000 a year. Over 30 years, with a hypothetical 6 percent average return, that could grow to roughly $475,000. Actual returns vary.
Tips: choose between traditional (pre-tax) and Roth (after-tax) contributions based on your tax situation, review your fund allocation (G, F, C, S, I and Lifecycle funds) and increase your contribution when you get raises. Check the annual contribution limits, which the IRS adjusts periodically. This calculator is for education, not financial advice.
How to use the TSP Calculator on Minedit: enter your values in the fields, press calculate, and review the step-by-step breakdown under the result. If something looks off, change one input at a time to see how it affects the answer, which is also a great way to learn the math behind it.
Why use an online TSP Calculator: it saves time, avoids simple arithmetic mistakes and shows each step, so you can check your homework, plan a project or make a decision with confidence. Bookmark the page so it’s ready the next time you need it.
For official plan information, visit TSP.gov. Find Roth 401(k) and compound interest calculators on Minedit.