Federal Employee Tax Guide 2026: What GS Workers Actually Pay
Federal employees face the same income tax brackets as everyone else, but the interaction between GS-specific deductions and taxes creates unique considerations. Here is how your 2026 taxes work, including changes from the One Big Beautiful Bill Act (P.L. 119-21).
2026 Federal Income Tax Brackets
The OBBBA permanently extended TCJA rates. Seven brackets apply, with thresholds adjusted for inflation per IRS Rev. Proc. 2025-32.
| Rate | Single | Married Filing Jointly |
|---|---|---|
| 10% | $0 – $12,400 | $0 – $24,800 |
| 12% | $12,401 – $50,400 | $24,801 – $100,800 |
| 22% | $50,401 – $105,700 | $100,801 – $211,400 |
| 24% | $105,701 – $201,775 | $211,401 – $403,550 |
| 32% | $201,776 – $256,225 | $403,551 – $512,450 |
| 35% | $256,226 – $640,600 | $512,451 – $768,700 |
| 37% | $640,601+ | $768,701+ |
Standard Deductions: $16,100 (Single), $32,200 (MFJ), $24,150 (Head of Household). Source: IRS Rev. Proc. 2025-32.
What Reduces Your Federal Taxable Income
| Deduction | Reduces Federal Tax? | Reduces FICA? | Status |
|---|---|---|---|
| FERS contribution | Yes | No | Required |
| Traditional TSP | Yes | No | Optional |
| Roth TSP | No | No | Optional |
| FEHB (Premium Conversion) | Yes | Yes | Default |
| FEGLI | Yes | No | Default |
Social Security and Medicare (FICA)
Social Security: 6.2% on wages up to $184,500 in 2026 (26 U.S.C. §3101(a)). Medicare: 1.45% on all wages with no cap (26 U.S.C. §3101(b)). Additional Medicare Tax: 0.9% on wages exceeding $200,000 (Single) or $250,000 (MFJ) (26 U.S.C. §3101(b)(2)).
State Income Tax
Nine states have no income tax on wages: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. For GS employees in the DC metro area, state tax rates vary significantly: DC tops out at 10.75%, Virginia at 5.75%, and Maryland at 6.50% (state only—county taxes of 2.25%–3.20% apply on top). Your state of residence, not your duty station, determines which state tax applies.
OBBBA New Deductions (Not in Calculator V1)
The OBBBA (P.L. 119-21) created several new deductions effective 2025–2028 that are not yet included in our calculator:
No-tax-on-overtime: Up to $12,500 deduction ($25,000 MFJ), phasing out above $150,000/$300,000. No-tax-on-tips: Up to $25,000 for qualifying occupations. Additional senior deduction: $6,000 for age 65+, phasing out above $75,000/$150,000. Source: IRS OBBBA Provisions.
Sources & Legal Citations
Federal Tax Brackets: IRS Rev. Proc. 2025-32; P.L. 119-21 (OBBBA), IRC §1(j)
Social Security: 26 U.S.C. §3101(a), §3121(a)(1); SSA.gov
Medicare: 26 U.S.C. §3101(b); Additional Medicare: 26 U.S.C. §3101(b)(2)
Premium Conversion: 26 U.S.C. §125
OBBBA Deductions: IRS FS-2025-03, FS-2026-01
Understanding Your W-4 and Withholding
Federal employees complete Form W-4 to determine their income tax withholding. The IRS Pub 15-T provides the percentage method that payroll offices use to calculate your biweekly withholding. The calculator on our site uses this same methodology: annualize biweekly wages, subtract the standard deduction, apply progressive brackets, then de-annualize to get the per-period amount.
If you find that your actual tax refund or balance due differs significantly from expectations, consider adjusting your W-4 with your agency payroll office. Common reasons for discrepancies include: a working spouse (which effectively pushes your combined income into higher brackets), significant investment income, itemized deductions that differ from the standard deduction, or child tax credits.
State Tax Comparison for Federal Employees
Your state of residence has a significant impact on take-home pay. Here is how the same GS-12 Step 5 employee ($102,415 in the DC metro area) fares across common states for federal workers:
Virginia (5.75% top rate): Approximate annual state tax of ~$4,600. VA has a relatively simple graduated structure with low bracket thresholds.
Maryland (6.50% top state rate + county taxes): State tax of ~$4,100 plus county income tax of 2.25%-3.20%, adding another $2,000-$3,000. Total state/local tax burden can exceed Virginia despite similar state rates.
DC (8.5% rate for this income level): Approximate state tax of ~$5,800. DC's higher rates at mid-range incomes make it the most expensive of the three major DC metro jurisdictions for most GS employees.
Texas/Florida (0%): No state income tax. The same employee keeps an additional $4,000-$6,000 per year compared to DC-area counterparts. However, the Rest of U.S. locality rate (17.06%) is significantly lower than DCB (33.94%), which partially or fully offsets the state tax savings.
Additional Medicare Tax
Employees earning above $200,000 (Single) or $250,000 (MFJ) face an additional 0.9% Medicare surtax on wages above those thresholds (26 U.S.C. §3101(b)(2)). For GS employees, this primarily affects GS-15 employees in high-locality areas. At the $197,200 pay cap, a single filer would not reach the threshold on salary alone, but combined household income may trigger it on the MFJ return.
Tax-Advantaged Deductions Available to Federal Employees
Beyond the deductions in our calculator, federal employees may also benefit from: Flexible Spending Accounts (FSAs) for healthcare and dependent care expenses (reduces both taxable income and FICA wages, similar to FEHB Premium Conversion); Health Savings Accounts (HSAs) if enrolled in an HDHP plan; and the federal child tax credit ($2,200 per qualifying child for 2025-2028 under OBBBA). These are not yet included in our V1 calculator but are documented on our Methodology page.
Tax Planning Strategies for Federal Employees
Maximize pre-tax deductions: Traditional TSP contributions, FSA contributions, and FEHB premiums all reduce your federal taxable income. For an employee in the 22% bracket, every $1,000 in additional pre-tax deductions saves $220 in federal taxes plus applicable state taxes.
Consider Roth conversions in low-income years: If you take a sabbatical, extended LWOP, or have a year with lower income, this may be an opportunity to convert Traditional TSP to Roth at a lower tax rate. However, TSP does not currently allow in-plan Roth conversions; you would need to roll over to a Roth IRA after separation.
Charitable giving strategies: Under the OBBBA, taxpayers who take the standard deduction can still deduct up to $150 ($300 MFJ) in charitable contributions. For larger charitable giving, consider whether itemizing (if total itemized deductions exceed $16,100 single / $32,200 MFJ) would be beneficial.
SALT deduction: The OBBBA raised the state and local tax (SALT) deduction cap to $40,000 for taxpayers earning under $500,000. This may make itemizing worthwhile for federal employees in high-tax states (DC, MD, NY, CA) who also have significant property tax or mortgage interest deductions.
Estimated Tax Impact by GS Grade
Here is an approximate breakdown of total paycheck deductions as a percentage of gross pay for employees in the DC area, Single filer, FERS-FRAE, 5% Traditional TSP, average FEHB Self Only:
GS-7 Step 1 ($68,405): Approximately 28-30% total deductions (FERS 4.4%, TSP 5%, FEHB ~4%, SS 6.2%, Medicare 1.45%, Federal tax ~7-8%, DC tax ~4%). Net take-home roughly 70% of gross.
GS-12 Step 5 ($102,415): Approximately 32-35% total deductions. The higher marginal tax bracket (22%) increases the federal tax share. Net take-home roughly 65-68% of gross.
GS-15 Step 10 ($197,200 capped): Approximately 36-40% total deductions. Higher federal bracket (24%), full DC rates, and potentially Additional Medicare Tax. Net take-home roughly 60-64% of gross.
These are illustrative estimates. Use our calculator for your exact figures based on your specific grade, step, locality, FERS tier, TSP percentage, FEHB premium, state, and filing status.
Frequently Asked Questions
What tax bracket am I in as a GS employee?
It depends on your taxable income after deductions. A single GS-12 Step 5 in the DC area ($102,415 salary) with typical pre-tax deductions will likely be in the 22% marginal bracket for 2026. Use our calculator to see your specific estimated federal tax withholding.
Does Traditional TSP reduce my taxes?
Yes. Traditional TSP contributions reduce your federal taxable income. A 5% contribution at a GS-12 salary saves roughly $43 per biweekly paycheck in federal taxes compared to Roth TSP. However, TSP does not reduce FICA taxes (Social Security and Medicare).
At what income does the Social Security tax cap apply?
In 2026, you stop paying the 6.2% Social Security tax once your cumulative FICA wages reach $184,500 for the year. Source: SSA.gov; 26 U.S.C. §3121(a)(1). For most GS employees, this cap is not reached. GS-14 Step 10 and above in high-locality areas may hit it.
Does my state of residence or duty station determine state taxes?
Your state of residence determines which state income tax applies, not your federal duty station. A Virginia resident working at a DC federal agency pays Virginia state taxes, not DC taxes.
What are the OBBBA tax changes for federal employees?
P.L. 119-21 (signed July 4, 2025) permanently extended TCJA rates, increased the SALT deduction cap to $40,000, and created temporary deductions for overtime, tips, and seniors (2025-2028). Most GS employees benefit from the SALT increase if they itemize, but standard GS pay does not generate tips income. Source: IRS Rev. Proc. 2025-32.