The Thrift Savings Plan elective deferral limit is $24,500 for the 2026 tax year. At Rank and Pay, we track military and federal retirement figures against official releases so you can set payroll elections with confidence. Understanding these caps helps service members and federal employees maximize their retirement savings while avoiding payroll errors.
Your elective deferral cap covers all personal contributions to Traditional and Roth TSP accounts combined. The Internal Revenue Service (IRS) Notice 25-67 established this $24,500 figure under Internal Revenue Code section 402(g). That represents a $1,000 increase from the $23,500 cap in place for 2025. The Federal Retirement Thrift Investment Board confirmed the exact same standard in its TSP Bulletin 25-3.
What Counts Toward the Elective Deferral Cap
Personal paycheck deductions to both Traditional and Roth TSP count toward the $24,500 elective deferral limit. Employer matching funds, agency automatic contributions, and tax-exempt combat-zone pay do not reduce this personal allowance. Federal payroll software tracks your personal salary deferrals across the calendar year to enforce this boundary.
Uniformed service members enrolled in the Blended Retirement System (BRS) receive an automatic 1 percent agency contribution plus matching contributions up to an additional 4 percent. These government funds bypass your $24,500 elective deferral ceiling entirely. They accumulate in your account without restricting how much of your base pay you can choose to save.
Choosing between tax treatments does not create separate allowances. If you split contributions between accounts as outlined in our guide on TSP Roth vs Traditional, the combined sum cannot cross $24,500. The following table outlines how different deposit types interact with federal thresholds.
| Contribution Type | Counts Toward $24,500 Limit | Counts Toward $72,000 Limit |
|---|---|---|
| Traditional TSP Deferrals | Yes | Yes |
| Roth TSP Deferrals | Yes | Yes |
| Agency Automatic (1%) | No | Yes |
| Agency Matching (Up to 4%) | No | Yes |
| Tax-Exempt Combat Pay (Traditional) | No | Yes |
Catch-Up Limits for Workers Age 50 and Older
Participants age 50 or older can contribute up to $32,500 to the TSP in 2026. The standard catch-up contribution ceiling under Internal Revenue Code section 414(v) is $8,000 for the 2026 tax year. This supplemental allowance sits directly above the base $24,500 elective deferral limit.
Participants who turn 50 at any point during the calendar year become eligible for the standard catch-up limit. You do not have to wait until your birthday month to increase deductions. The IRS permits participants to schedule higher payroll withholdings starting in January of the qualifying year.
A higher catch-up tier applies to participants turning 60, 61, 62, or 63 during 2026. Under provisions established by the SECURE 2.0 Act, these individuals receive a special catch-up allowance of $11,250. When added to the standard $24,500 base, workers in this four-year age window can contribute up to $35,750 for the year. Details on this rule appear in official IRS catch-up contribution guidance.
Catch-up elections run through the automated spillover method. Introduced in 2021, the spillover process removes the requirement to file a separate catch-up payroll form. Any regular deferrals that exceed the $24,500 cap automatically flow into your catch-up bucket until you hit your age-based ceiling.
The Annual Additions Limit and Who Reaches It
The total annual additions limit for the TSP is $72,000 per participant in 2026. Set by Internal Revenue Code section 415(c), this overall ceiling covers all employee deposits, agency matching money, automatic 1 percent contributions, and tax-exempt deployment pay. Civilian employees rarely approach this threshold because agency matches rarely bridge the gap between $24,500 and $72,000.
Military personnel serving in designated combat zones represent the primary group affected by this cap. Under combat-zone tax exclusions, military pay earned during qualifying deployments is exempt from federal income tax. Service members can deposit this tax-exempt income directly into the Traditional TSP without consuming their $24,500 elective deferral room.
Tax-exempt combat deposits flow straight toward the $72,000 annual additions limit. A deployed service member can contribute up to the full $72,000 ceiling using a combination of regular pay, matching funds, and combat pay. However, Roth TSP contributions from combat pay still count against the $24,500 elective deferral cap. Only Traditional TSP combat contributions expand your total savings capacity up to the $72,000 boundary.
Per-Pay-Period Calculations for a 26-Period Year
Reaching the exact $24,500 limit across 26 biweekly pay periods requires contributing $942.31 per pay period. Federal civilian payroll schedules and active-duty military systems operate on predictable cycles. Calculating your deduction rate prevents underfunding your account or exhausting your limit prematurely.
The following targets show the calculated breakdown for each contribution ceiling across a standard 26-pay-period year:
- Under age 50: $24,500 divided by 26 equals $942.31 per pay period.
- Age 50 to 59, and age 64+: $32,500 divided by 26 equals $1,250.00 per pay period.
- Age 60 to 63: $35,750 divided by 26 equals $1,375.00 per pay period.
These breakdowns represent calculated targets rather than official payroll increments. Because many agency payroll systems require whole-dollar entries, you may choose to deposit $942 for 25 periods and submit $950 on the final pay date. Setting your payroll deductions to reach the limit evenly across the entire year protects your matching funds.
Service members under BRS risk losing matching money if they front-load contributions too aggressively. The government calculates the 4 percent match pay period by pay period. If you reach the $24,500 cap in September, your payroll office cuts off personal deductions for the remainder of the year. When your deduction drops to zero percent in November and December, your 4 percent agency match also drops to zero for those months.
The Shared Cap Between TSP and Civilian Plans
The $24,500 elective deferral limit applies to you as an individual rather than to each retirement account separately. If you change jobs during the year or balance a civilian 401(k) or 403(b) alongside military reserve service, both plans draw from the same $24,500 pool. Holding two separate workplace accounts does not double your elective deferral allowance.
Separate employers cannot monitor each other's payroll records. Your civilian employer payroll system only tracks the money deducted within that company. Military payroll systems only track your military paycheck. If you contribute $15,000 to a civilian 401(k) and $15,000 to the TSP, you generate an excess deferral of $5,500.
Resolving an excess deferral requires proactive intervention before tax-filing deadlines. Crossing your elective deferral cap triggers corrective paperwork to avoid paying income taxes twice on the excess amount. We explain the financial implications and corrective refund procedures in our guide to the TSP excess contribution penalty.
Differences Between TSP and IRA Annual Limits
Individual Retirement Account (IRA) contributions do not affect your TSP elective deferral limit. For 2026, the IRA contribution cap is $7,000 for individuals under age 50, or $8,000 for individuals age 50 and older. You can fully fund both a TSP account and an IRA in the same calendar year without violating federal rules.
A worker under 50 can deposit $24,500 into the TSP and $7,000 into a Traditional or Roth IRA during 2026. That allows a total personal retirement deferral of $31,500. We analyze how to prioritize dollars between these two account structures in our breakdown of TSP vs IRA rules.
After determining how much to allocate to your retirement accounts, focus on asset allocation. You can review available portfolio mixes in our overview of the best TSP funds. For those planning future distributions, our guide on TSP withdrawal strategies covers the rules for accessing your savings in retirement.
Who These Contribution Strategies Do Not Serve
Workers who require immediate access to their cash reserves should not attempt to hit the maximum TSP contribution limits. Money placed into the TSP is generally inaccessible until retirement age, barring specific loan programs or hardship distributions. Committing excessive salary toward retirement can leave a household vulnerable if emergency expenses arise.
Savers who lack an emergency fund should prioritize three to six months of living expenses in an accessible savings account before maximizing retirement accounts. Once liquid emergency reserves are secure and high-interest consumer debt is cleared, increasing TSP deductions toward the annual limit becomes a sound allocation strategy.
Next Steps for Setting Your Allocation
An unexpected statutory revision by the IRS, or a SECURE 2.0 change to the 60-63 catch-up age brackets, would change these figures. Barring such an update, these numbers remain the official parameters for 2026 contributions as published on the official TSP contribution limits page.
Log into your military or federal payroll portal today to review your current deduction percentage. Setting your payroll deduction early ensures you hit the exact tsp contribution limits without missing out on matching funds.