Are you a federal employee or member of the uniformed services looking to get the most out of your Thrift Savings Plan (TSP)? This updated guide covers everything you need to know in 2025 — including contribution limits, fund choices, investing strategies, new rules, and practical tips to maximize your TSP for a comfortable retirement.
Quick Definition: The Thrift Savings Plan (TSP) is a low-cost, tax-advantaged retirement savings plan for federal employees and uniformed service members, similar to a 401(k) but with ultra-low fees.
What is a Thrift Savings Plan (TSP)?
The TSP is a defined-contribution retirement plan for federal employees and members of the uniformed services.
- Traditional TSP: Pre-tax contributions lower your taxable income now; withdrawals are taxed in retirement.
- Roth TSP: After-tax contributions; withdrawals are tax-free in retirement if rules are met.
- Administered by: The Federal Retirement Thrift Investment Board (FRTIB).
- Why it’s unique: Extremely low costs (~0.04%–0.06%) and simple investment options.
Who Qualifies For A TSP?
Eligible participants include:
- Federal civilian employees (including Members of Congress and staff)
- Members of the uniformed services (including Ready Reserve)
- Members of the Foreign Service
Note: Contractors and private-sector employees are not eligible.
What Are the Five TSP Funds?
The TSP offers five core funds and Lifecycle (L) Funds:
Core Funds
- G Fund (Government Securities): Safest option, backed by U.S. government securities, with a low return.
- F Fund (Fixed Income): Invests in bonds and offers moderate returns with slightly higher risk.
- C Fund (Common Stock): Tracks the S&P 500 and provides exposure to large-cap U.S. stocks.
- S Fund (Small Cap): Targets small- to mid-sized U.S. companies for higher growth potential.
- I Fund (International): Invests in international companies for global diversification.
Lifecycle (L) Funds
Lifecycle Funds are target-date retirement funds. They automatically adjust the allocation of assets over time, shifting from high-growth investments to more conservative options as you near retirement.
What are some benefits of the TSP?
- Diversification: Access to bonds, stocks, and international funds.
- Low Fees: Expense ratios as low as 0.05%, among the lowest in the industry.
- Tax Advantages: Contributions can be pre-tax (Traditional TSP) or post-tax (Roth TSP).
- Employer Matching: Many agencies match up to 5% of your contributions.
- Portability: Roll over your TSP funds to other retirement plans if you leave federal service.
What are the disadvantages?
- Limited investment options: Only six types of TSP funds. However, they have recently addressed this by offering a mutual fund window, which gives federal employees access to a broader range of investment options.
- Early Withdrawal Penalty: Withdrawals before age 59 ½ may incur a 10% penalty.
- Defined Contribution Plan: No guaranteed lifetime income.
- Post-Service Contributions: You can’t contribute after leaving federal service, although you can keep your funds in the TSP.
TSP contribution limit 2025 & 2024
- 2024: $23,000
- 2025: $23,500
- Catch-Up Contributions (Age 50+): Additional $7,500
- Special Catch-Up (Age 60-63): Additional $11,500
- Combat Zone Contributions: Up to $70,000 annually
Per-paycheck guide (2025)
- 26 pay periods (biweekly): $903.85/check
- 24 pay periods (semi-monthly): $979.17/check
- Roth-only catch-up delay: SECURE 2.0’s Roth-only catch-up for high earners starts in 2026, not 2025.
TSP Elective Deferral & Contribution Limits (2026, 2025, & 2024)
| Year | Elective Deferral | Catch-Up (50+) | Higher Catch-Up (60–63) | Annual Additions* |
|---|---|---|---|---|
| 2026 | $24,500 | $8,000 | $11,250 | $72,000 |
| 2025 | $23,500 | $7,500 | $11,250 | $70,000 |
| 2024 | $23,000 | $7,500 | N/A | $69,000 |
How To Invest In TSP Funds
Early Career: Growth-Focused
Allocate more to the C, S, and I Funds to maximize long-term returns.
Nearing Retirement: Conservative Approach
Shift to the G and F Funds to preserve capital and reduce risk.
Simplified Option: Lifecycle Funds
Lifecycle Funds automatically adjust your portfolio based on your retirement date.
– What TSP fund is best?
The answer to this question depends on your risk tolerance and how close you are to retirement. The G and F Funds are bond funds, which means they are relatively safe investments, but the expected return will be low. Over the past 10 years, the G Fund’s average annual return was about 2.4%, and the F Fund’s was 1.8% (as of July 31, 2024).
The C, S, and I Funds are stock funds, which means they will go up and down significantly in any given year (up to +/- 40%). Over the past ten years, the C Fund’s average annual return was about 13.1%, the S Fund’s was about 9.5%, and the I Fund’s was about 5.2%. But remember, past performance is not a guarantee of future performance.
Tips to Maximize Your TSP
1. Leverage the Roth TSP Option
Contribute to a Roth TSP for tax-free growth. While Traditional TSP contributions lower your taxable income today, Roth TSP withdrawals in retirement are entirely tax-free.
2. Contribute Beyond the 5% Match
Don’t stop at 5%, the typical employer match rate. Maximize your contributions to reach the annual limit and accelerate your retirement savings.
3. Don’t Overlook the I and S Funds
Incorporate these funds into your portfolio for international exposure and access to small-cap stocks, which can offer higher returns over time.
Key Differences Between TSP, 401(k), and IRA (2026 & 2025)
| Feature | TSP | 401(k) | IRA |
|---|---|---|---|
| 2026 Employee Limit | $24,500 | $24,500 | $7,500 |
| 2026 Catch-Up (50+) | $8,000 | $8,000 | $1,000 |
| 2026 Higher Catch-Up (60–63) | $11,250 | $11,250 | N/A |
| 2025 Employee Limit | $23,500 | $23,500 | $7,000 |
| 2025 Catch-Up (50+) | $7,500 | $7,500 | $1,000 |
| 2025 Higher Catch-Up (60–63) | $11,250 | $11,250 | N/A |
| Employer Match | Up to 5% | Varies by employer | None |
| Investment Choice | Limited (TSP funds) | Broad | Very broad |
TSP Withdrawal Rules
- Without Penalty: After age 59 ½ or age 55 if separated from service.
- Required Minimum Distributions (RMDs): Begin at age 73 (age 75 starting in 2033).
- Lump Sum: Available but often discouraged due to potential tax and penalty implications.
The TSP Mutual Fund Window
For advanced investors wanting more options, you may want to explore the TSP Mutual Fund Window
- Eligibility: ≥ $40k in TSP, first transfer ≥ $10k, ≤ 25% of balance in MFW.
- Fees: $37 admin + $95 maintenance + $28.75/trade + fund expenses.
- Restriction: Must move funds back to core before loans or withdrawals.
Is The Thrift Savings Plan Safe In 2025?
A common question among federal employees is, “Is the Thrift Savings Plan safe?” Overall, the TSP remains a secure and reliable retirement savings option, with the G Fund often viewed as its safest investment. The G Fund is unique—it’s invested in special-issue U.S. Treasury securities and offers a government-backed return with no risk of loss to principal.
However, during debt ceiling debates or funding shortfalls, the federal government has historically used the G Fund as a temporary source of cash to help meet its financial obligations. This practice, known as “disinvesting” the G Fund, has occurred multiple times, most recently in early 2023. While this may sound alarming, TSP participants are always made whole, with full restoration of funds and lost interest after the issue is resolved.
Despite occasional political maneuvering, the TSP—and especially the G Fund—remains one of the most stable and trustworthy retirement savings tools available to federal workers.
Latest TSP News – August 2025
- L 2075 launched; L 2025 merged into L Income.
- Higher catch-up ($11,250) for ages 60–63 began in 2025.
- Roth-only catch-ups delayed to 2026.
- Mobile app and website upgrades improve security and usability.
What Is The TSP Rule Of 55?
The TSP Rule of 55 is a provision that allows federal employees to begin penalty-free withdrawals from their Thrift Savings Plan if they separate from service in the year they turn 55 or later.
Unlike traditional retirement withdrawals that typically incur a 10% early withdrawal penalty if taken before age 59½, the Rule of 55 provides an exception for those who retire or leave their federal job between the ages of 55 and 59½. It’s important to note that this rule applies only to the TSP balance from your current or most recent federal job, not from any previous employers, and it doesn’t apply if you roll your TSP into an IRA.
For those considering early retirement, this rule can be a valuable strategy for accessing retirement funds without penalties, but it should be carefully coordinated within a broader financial plan.
Common questions about Thrift Savings Plans
- Can I roll TSP into an IRA or 401(k)?
Yes — Traditional to Traditional, Roth to Roth — without tax penalty. - How much do I need in my TSP to retire?
Depends on your spending needs, other income, and longevity. A financial plan can give you a target. - Is TSP better than a 401(k)?
For fees and simplicity, TSP usually wins. For fund choice, most 401(k)s offer more options.
Take the time to learn how to take full advantage of your TSP.
The Thrift Savings Plan is a powerful tool for federal employees and military service members to build a secure retirement. By understanding your investment options, maximizing contributions, and leveraging tax advantages, you can grow and protect your savings over time.
If you want a comprehensive financial plan, schedule a free discovery call with one of our fiduciary financial planners today!
Alvin Carlos, CFP®, CFA is a fee-only financial planner, in Washington, D.C. He has a Master’s degree in International Relations from SAIS-Johns Hopkins. Alvin is the founder of District Capital, a financial planning firm designed to help professionals in their 30s and 40s maximize their money and retire by 55, through holistic financial planning and research-driven investing. Schedule a free discovery call today.
