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F-1 OPT · Illinois · Tax year 2026

F-1 OPT take-home pay in Illinois, salary

$78,338 / year

That's $6,528/month or $3,013/biweekly, after federal income tax and state income tax (21.66% effective tax rate).

Annual
$78,338
Monthly
$6,528
Bi-weekly (×26)
$3,013

Why this number differs from a generic paycheck calculator

  • F-1 OPT holders are FICA-exempt — generic calculators add ~7.65% you don't owe.

    As a nonresident-alien F-1 OPT holder, you don't owe Social Security (6.2%) or Medicare (1.45%) on wages earned for services your visa authorizes. Generic paycheck calculators assume W-2 employee status and quietly add this 7.65% on top — making their take-home roughly $7,650 lower than the correct number. IRC §3121(b)(19) / IRS Pub 519.

  • NRAs cannot claim the federal standard deduction.

    Generic calculators silently apply the $16,100 single standard deduction. As a nonresident alien (no applicable treaty), you don't get it — that's roughly $3,542–$3,864 more federal tax at typical bracket rates. IRS Pub 519.

Compare scenarios for this salary
Default (NRA, single) $78,338 From India (treaty) $81,880 After NRA period (resident) $74,230

How is the take-home calculated?

Line item Annual % of gross Source
Gross salary $100,000 100.00% Input ·
Federal income tax −$16,712 16.71% IRS Rev. Proc. 2025-32
State income tax −$4,950 4.95% State Department of Revenue
Take-home pay $78,338 78.34%

Effective tax rate 21.66% · Marginal federal 22.00% · Marginal state 4.95% · 5 line items hidden ($0 at this scenario)

Show the math

  1. Gross salary: $100,000 .
  2. Federal taxable income: $100,000 (after standard deduction of $0).
  3. Federal income tax: $16,712 — computed by stepping through the SINGLE progressive brackets:
    • 10% on income up to $12,400
    • 12% on income up to $50,400
    • 22% on income up to $105,700
    • 24% on income up to $201,775
    • 32% on income up to $256,225
    • 35% on income up to $640,600
    • 37% on income above the previous cap
  4. FICA exemption: $0 — this visa is exempt from Social Security and Medicare as a nonresident alien (NRA) under IRC §3121(b)(19) / IRS Pub 519.
  5. State tax: $4,950 (income tax $4,950 + SDI/local $0).
  6. Total tax: $21,662 = 21.66% of gross.
  7. Take-home: $100,000 − $21,662 = $78,338.
Assumptions used in this calculation (2)
  • NRAs cannot claim the standard deduction (exception: F-1/J-1 students from India under treaty Article 21).
  • F-1 OPT holders are FICA-exempt for the first 5 calendar years (Social Security + Medicare = $0 while NRA).

Real purchasing power (cost-of-living adjusted)

IL price level: 99.1 (US average = 100). Your $78,338 nominal take-home buys roughly $79,049 worth of goods and services at US-average prices — about $711more, because IL is 0.9% cheaper than the national average.

Source: BEA Regional Price Parities (RPP) — most recent available release. US average = 100. Numbers are rounded.. RPP measures all goods and services (housing, food, transportation, utilities). Last updated 2026-04-29.

Try your own numbers

$
Used for treaty lookup (e.g. India F-1 standard deduction).
$
$
Annual take-home
$78,338
$6,528 / month · $3,013 bi-weekly
Federal income tax
$16,712
FICA (exempt)
$0
State income tax
$4,950
Total tax
$21,662
Effective rate 21.66% · Marginal federal 22.00% · Marginal state 4.95%

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Other salary points for F-1 OPT in Illinois

$60,000 $80,000 $100,000 $120,000 $150,000 $180,000 $220,000 $280,000 $350,000 $500,000

Considering a move? See F-1 OPT state-by-state comparisons.

Frequently asked questions

Specific to this visa, state, and salary. Sourced to IRS, SSA, and state DOR.

How much does a F-1 OPT earn after tax on $100,000 in Illinois?
A F-1 OPT holder grossing $100,000 in Illinois takes home approximately $78,338 per year, or about $6,528/month. Total federal + state + payroll tax burden: $21,662 (21.66% effective rate).
Are F-1 OPT holders subject to FICA in this scenario?
No. F-1 OPT holders in NRA status are exempt from Social Security and Medicare for the first 5 calendar years (IRC §3121(b)(19), IRS Pub 519).
Can the standard deduction be claimed in this scenario?
No — as an NRA without an applicable tax treaty, the federal standard deduction is not available. NRAs may itemize state and local taxes paid only.
What state taxes apply in Illinois?
Illinois levies a flat 4.95% state income tax. On $100,000 that comes to $4,950.
How much would I save by moving to a no-state-tax state at this salary?
On $100,000, the same scenario in Texas (no state income tax) would net approximately $83,288 — about $4,950/year more than Illinois. Florida, Washington, Nevada, South Dakota, Wyoming, Alaska, Tennessee, and New Hampshire give the same result. Cost-of-living adjustments not included.
How are bonuses and RSU vesting taxed for F-1 OPT holders?
Bonuses and RSUs are supplemental wages. Federal supplemental withholding is a flat 22% on amounts up to $1M, then 37% above. Illinois applies its standard income-tax rules. FICA still applies if the visa is not FICA-exempt. This is withholding, not the final tax — high earners often underwithhold and owe at filing time.
Where do these numbers come from?
Federal: IRS Rev. Proc. 2025-32 (2026 inflation adjustments). FICA: IRS Pub 15 + SSA 2026 COLA. State: Illinois Department of Revenue. NRA rules: IRS Pub 519. Full source list and verification status on the verification page.

Sources

  1. IRS Rev. Proc. 2025-32 (2026 inflation adjustments) (opens in new tab) — Federal tax brackets and standard deduction.
  2. IRS Pub 15 (Employer Tax Guide) (opens in new tab) — FICA withholding mechanics.
  3. IRS Pub 519 (US Tax Guide for Aliens) (opens in new tab) — NRA rules, substantial presence, treaty benefits.
  4. IRS Substantial Presence Test (opens in new tab)
  5. SSA 2026 COLA fact sheet (opens in new tab) — Social Security wage base.
  6. Illinois Department of Revenue (opens in new tab) — State income tax rates and brackets.