TSP Growth & Withdrawal Calculator
Project your TSP balance growth, calculate safe withdrawal rates for retirement, and see your total income including FERS annuity and Social Security.
%
Your annual contribution:$10,000
Government match:$4,000
Total annual contribution:$14,000
IRS limit (standard):$24,500
Government Match Breakdown
1% AutomaticFree
Given regardless of your contribution
$800
First 3.0% matched 100%
You contribute 3.0%, agency matches 3.0%
$2,400
Next 2.0% matched 50%
You contribute 2.0%, agency matches 1.0%
$800
Total Annual Match
$4,000
Maximizing your match!
You're getting the full 5% government match.
Projected Balance at Age 62
$1,426,461
Your Contributions
$270,000
Agency Match
$108,000
Investment Growth
$998,461
Years to Retirement
27
Traditional TSP
$1,426,461
(100.0%)
Roth TSP
$0
(0.0%)
Know Your 2026 GS Salary
Your TSP contributions come from your paycheck. Look up your exact GS pay with locality to plan the right contribution percentage.
Related Tools
2026 TSP Contribution Limits
The IRS sets annual limits on TSP contributions. SECURE 2.0 introduced a "super catch-up" for ages 60-63 starting in 2025.
| Category | Annual Limit | Per Pay Period (26) |
|---|---|---|
| Regular (all ages) | $24,500 | $942.31 |
| Catch-up (age 50+) | + $8,000 | + $307.69 |
| Total (age 50+) | $32,500 | $1,250.00 |
| Super catch-up (ages 60-63) | + $11,250 | + $432.69 |
| Total (ages 60-63) | $35,750 | $1,375.00 |
2026 Change: If you earned over $145,000 in 2025, all catch-up contributions must be Roth (mandatory under SECURE 2.0). Regular contributions can still be Traditional or Roth.
How TSP Agency Matching Works (FERS)
FERS employees receive matching contributions up to 5% of basic pay. This is essentially free money - an immediate 100% return on your contribution.
| You Contribute | Agency Auto | Agency Match | Total Free | Total to TSP |
|---|---|---|---|---|
| 0% | 1% | 0% | 1% | 1% |
| 3% | 1% | 3% | 4% | 7% |
| 5%+ | 1% | 4% | 5% | 10% |
Vesting: Your contributions and the 4% match are immediately vested. The 1% automatic contribution vests after 3 years of federal civilian service. If you leave before vesting, you forfeit only the 1% automatic portion.
TSP Fund Options Explained
TSP offers five individual funds (G, F, C, S, I) plus Lifecycle (L) funds that automatically rebalance based on your target retirement date.
G Fund
Government Securities
Guaranteed by U.S. Government. Never loses principal. ~4.4% return.
Risk: Lowest
F Fund
Fixed Income (Bonds)
Tracks Bloomberg U.S. Aggregate Bond Index. Can lose value.
Risk: Low-Moderate
C Fund
S&P 500 Index
500 largest U.S. companies. Most popular TSP fund. ~17.9% in 2025.
Risk: Moderate
S Fund
Small/Mid Cap Stocks
U.S. stocks NOT in S&P 500. Higher growth potential, more volatile.
Risk: Moderate-High
I Fund
International Stocks
40+ developed/emerging markets (ex-USA). Record 32.5% in 2025.
Risk: Moderate-High
L Funds
Lifecycle / Target-Date
Auto-rebalances from stocks to bonds as you approach retirement.
Risk: Varies by target date
TSP fees are among the lowest in the industry: 0.04% average (4 cents per $100). A typical 401(k) charges 0.5-1.5%. Over 30 years, this saves tens of thousands of dollars.
NEW 2026
Roth In-Plan Conversions
Starting January 28, 2026, you can convert Traditional TSP to Roth TSP directly within your account—no need to roll out to an IRA first.
How It Works
- • Minimum conversion: $500
- • Maximum: 26 conversions per year
- • Must leave $500 in each contribution source
- • Available in My Account starting Jan 28
Tax Impact
- • Conversion amount is taxable income
- • TSP does NOT withhold taxes
- • Pay via estimated taxes or adjust W-4
- • Once converted, cannot be undone
Best for: Low-income years, market downturns (convert more shares for same tax), reducing future RMDs, or building tax-free retirement funds.
Traditional vs Roth TSP
Traditional TSP
- ✓Contributions reduce taxable income now
- ✓More take-home pay today
- ✗Withdrawals taxed as ordinary income
Best for: High earners (GS-14+), near retirement, expect lower tax bracket later
Roth TSP
- ✗No tax deduction now
- ✓Growth and withdrawals are 100% tax-free
- ✓Hedge against future tax increases
Best for: Early career, lower tax bracket now, expect higher taxes later
Pro tip: You can split contributions between Traditional and Roth for tax diversification in retirement. Agency matching contributions always go to Traditional regardless of your election.
Learn More About TSP
Understand contribution limits, fund options, Roth vs Traditional, and withdrawal strategies.
Read the Complete TSP Guide 2026 →