Strategy: TSP Maximization Methods

Section 1: Regulatory Context

Federal employee contributions are limited by Internal Revenue Code (IRC) Section 402(g), which establishes the annual elective deferral limit. For 2026, this limit is $24,500. For participants in the Federal Employees Retirement System (FERS), agencies provide a mandatory 1% automatic contribution and up to 4% in matching contributions, governed by Title 5 of the U.S. Code. To receive the full 5% agency contribution, employees must maintain their own contributions in every pay period of the calendar year.

Section 2: If/Then Scenarios

• If a participant under age 50 intends to reach the absolute maximum contribution for 2026, then they should allocate approximately $943 per pay period (based on 26 pay periods) to ensure they do not “max out” before the final check.
• If a participant reaches the elective deferral limit too early in the year, then their employee contributions will cease for the remaining pay periods, resulting in the loss of the 4% agency match for those periods.
• If a participant turns age 50 or older in 2026, then they are eligible for an additional $8,000 catch-up contribution (totaling $32,500).
• If a participant turns 60, 61, 62, or 63 in 2026, then under SECURE 2.0, they qualify for a “super catch-up” limit of $11,250 (totaling $35,750).

Section 3: System Integration

The TSP utilizes the “spillover” method for participants age 50 and older. Once the regular elective deferral limit is met, any subsequent contributions automatically “spill over” into the catch-up category without requiring a separate election. However, for high earners with 2025 FICA wages exceeding $150,000, the system is mandated by the SECURE 2.0 Act to automatically reclassify these catch-up amounts as Roth (after-tax) contributions. Payroll systems like myPay or Employee Express coordinate these limits to prevent over-contribution and ensure matching funds are applied to the Traditional balance.

Section 4: 3-Step Action Plan

1. Calculate Per-Pay Period Amounts: Use the TSP Contribution Calculator to divide the applicable 2026 limit ($24,500, $32,500, or $35,750) by your remaining pay periods to ensure even distribution.
2. Verify High-Earner Status: Review your 2025 W-2 (Box 5) to determine if your catch-up contributions must be designated as Roth to remain in compliance with the $150,000 income threshold.
3. Audit Match Capture: Review your Leave and Earnings Statement (LES) mid-year to confirm that you are contributing at least 5% of your basic pay in every period to avoid forfeiting agency matching funds.