Take-home pay in Illinois by business structure

At $100,000 of profit, an owner in Illinois keeps $77,215 as an LLC taxed as an S corp and $73,179 as a sole proprietor, after 2026 taxes and fees. Change the profit to see your own numbers.

$77,215 a year

kept from $100,000 of profit as an LLC taxed as an S corp in Illinois, after every tax and fee counted here. That is $9,795 more than as a C corporation.

Illinois, 2026: $100,000 profit, single filer

Structure	Taxes and fees	You keep	Share
Sole proprietorship	$26,821	$73,179	73%
Single-member LLC	$27,842	$72,158	72%
LLC taxed as an S corp most	$22,785	$77,215	77%
S corporation	$22,785	$77,215	77%
C corporation	$32,580	$67,420	67%

What Illinois takes from a business owner

Illinois taxes personal income at a flat 4.95% (2026).tax.illinois.gov, checked Oct 24, 2026
An LLC pays the state Annual Report (Form LLC-50.1), $75 a yearilsos.gov, checked Oct 24, 2026.
Illinois personal property replacement income tax (partnerships and S corps) applies to LLC, LLC as S corp, S corptax.illinois.gov, checked Oct 24, 2026.
An S corp in Illinois can elect to pay the state's income tax itself, a pass-through entity tax of 4.95%, and the owner gets a credit for it. The company deducts it on the federal return, so it is not held to the SALT cap. The calculator uses it when it lowers the totaltax.illinois.gov.
An S corp owner on payroll pays Illinois unemployment tax at 3.35% on the first $14,250 of salary in the first yearides.illinois.gov, checked Oct 24, 2026.

What you keep at each profit

Profit	Sole prop	LLC	LLC as S corp	S corp	C corp
$50,000	$38,113	$37,516	$37,903	$37,903	$35,213
$100,000	$73,179	$72,158	$77,215	$77,215	$67,420
$150,000	$105,637	$104,127	$112,250	$112,250	$95,795
$250,000	$172,142	$169,964	$180,685	$180,685	$154,359
$500,000	$308,542	$304,090	$333,720	$333,720	$294,367

Single filer, no other income, revenue 1.5 times profit, the default salary for S and C corps. The most kept at each profit is green.

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