With the values below, $113.23 is withheld for Illinois income tax and $183.60 for federal FICA, leaving $2,103.17.
The Illinois withholding guide we read on 14 November 2026 prints a formula, not a lookup table alone: subtract the value of the allowances claimed on Form IL-W-4, divided by the number of pay periods in the year, from the wages, then apply 4.95%. There are two allowance tiers with two different dollar values. This calculator keeps those two tiers and that divisor as separate boxes, so you can see what each one does to a single check. Three federal FICA lines are computed alongside it from published federal figures. The official sentences are printed verbatim below; state figures we could not read from a primary source are not applied here.
Social Security uses 6.2% on wages up to the $184,500.00 wage base, so none of this check is above the base. Additional Medicare uses 0.9% on wages above $200,000.00 in a calendar year, and none of this check is above that threshold.
Wages $2,400.00 less allowances of $112.50 leave $2,287.50 taxed at 4.95%, which is $113.23. The three federal lines add $183.60. Total withheld across both groups is $296.83, so the amount after those lines is $2,103.17.
All three examples put $2,400.00 of wages on the check. Example A is the default set of boxes: biweekly pay, one Line 1 allowance and no Line 2 allowance. Example B keeps the same wages and pay frequency but claims two Line 1 allowances and three Line 2 allowances, so the second tier changes the amount subtracted. Example C moves to weekly pay with year-to-date wages of $199,200.00, which puts part of this check past the two federal thresholds. Every dollar below is computed from the entries rather than copied from another printed figure.
Example A — one Line 1 allowance, biweekly (the default boxes)
Wages $2,400.00; 26 pay periods a year; Line 1 allowances 1; Line 2 allowances 0; year-to-date wages $48,000.00
Allowances — (1 × $2,925.00) + (0 × $1,000.00) = $2,925.00; $2,925.00 ÷ 26 = $112.50 on this check
Illinois — $2,400.00 − $112.50 = $2,287.50; $2,287.50 × 4.95% = $113.23
Federal FICA — Social Security $2,400.00 × 6.2% = $148.80; Medicare $2,400.00 × 1.45% = $34.80; Additional Medicare $0.00
Total withheld = $113.23 + $183.60 = $296.83 · after these lines = $2,400.00 − $296.83 = $2,103.17
Example B — both allowance tiers claimed
Wages $2,400.00; 26 pay periods a year; Line 1 allowances 2; Line 2 allowances 3; year-to-date wages $48,000.00
Allowances — (2 × $2,925.00) + (3 × $1,000.00) = $8,850.00; $8,850.00 ÷ 26 = $340.38 on this check
Illinois — $2,400.00 − $340.38 = $2,059.62; $2,059.62 × 4.95% = $101.95
Federal FICA — Social Security $148.80; Medicare $34.80; Additional Medicare $0.00, unchanged from Example A
Total withheld = $101.95 + $183.60 = $285.55 · after these lines = $2,400.00 − $285.55 = $2,114.45
Example C — weekly pay, year-to-date wages of $199,200.00
Wages $2,400.00; 52 pay periods a year; Line 1 allowances 1; Line 2 allowances 0; year-to-date wages $199,200.00
Allowances — $2,925.00 ÷ 52 = $56.25; Illinois — ($2,400.00 − $56.25) × 4.95% = $116.02
Social Security — $0.00, because year-to-date wages already exceed the $184,500.00 wage base
Additional Medicare — $199,200.00 + $2,400.00 = $201,600.00, so $1,600.00 of this check sits above $200,000.00 and $14.40 is withheld
Total withheld = $116.02 + $0.00 + $34.80 + $14.40 = $165.22 · after these lines = $2,400.00 − $165.22 = $2,234.78
The three examples side by side
| Example | Allowances this check | Illinois tax | Federal FICA | After these lines |
|---|---|---|---|---|
| A — one Line 1 | $112.50 | $113.23 | $183.60 | $2,103.17 |
| B — both tiers | $340.38 | $101.95 | $183.60 | $2,114.45 |
| C — weekly, over caps | $56.25 | $116.02 | $49.20 | $2,234.78 |
Example A, every line on the check
| Line on this check | Amount | Where the amount comes from |
|---|---|---|
| Wages | $2,400.00 | Amount typed into the wages box |
| Allowances subtracted | $112.50 | $2,925.00 of annual allowances divided by 26 pay periods |
| Illinois taxable wages | $2,287.50 | $2,400.00 less $112.50 |
| Illinois income tax | $113.23 | $2,287.50 at the 4.95% withholding rate |
| Social Security | $148.80 | $2,400.00 below the $184,500.00 wage base at 6.2% |
| Medicare | $34.80 | $2,400.00 at 1.45%, with no wage base limit |
| Additional Medicare | $0.00 | No wages above $200,000.00 in the calendar year |
| Total withheld | $296.83 | $113.23 plus the three federal lines |
| After these lines | $2,103.17 | $2,400.00 less $296.83 |
Read on 14 November 2026, the 2026 IL-700-T Illinois Withholding Tax Tables page states the rate, the two allowance values and the whole formula in plain text. We print those sentences exactly as we read them and draw no legal conclusion from them.
“How much do I withhold? The Illinois Income Tax withholding rate is 4.95%. To figure out how much to withhold from wages or other payments, subtract any exemptions from the wages paid, then multiply the result by 4.95%.”
“The Illinois income tax rate is 4.95%, and the exemption allowance is $2,925.”
“Tax withheld = 0.0495 × (Wages − (((Line 1 allowances × $2,925) + (Line 2 allowances × $1,000)) ÷ Number of pay periods in a year))”
Three things in those sentences are why this page has six boxes instead of one. Line 1 allowances and Line 2 allowances carry different dollar values, $2,925 and $1,000, so they need separate boxes. Their combined annual value is divided by the number of pay periods in a year, so the pay frequency has to be an input too. And the whole calculation is a single rate applied to what is left, not a set of brackets. The year-to-date wages box is there only for the two federal thresholds described below; it does not enter the Illinois formula.
These are the two allowance tiers and the divisor as the source describes them; this page does not restate them as a rule about who may claim an allowance, how a Form IL-W-4 is completed, or what an employer must do. Our Texas Paycheck Calculator takes one gross figure and looks at where the federal caps bite. Our California Paycheck Calculator prices a workweek under daily overtime bands. Our New York Paycheck Calculator takes four typed state and local withholding lines. Our Florida Paycheck Calculator keeps wages and reported tips as two lines feeding one federal FICA base. None of those four applies a state rate to a wage figure after dividing annual allowances by pay periods, and none prints the IL-700-T formula. This page is built around a different arithmetic, not around a different state name.
The same official page also prints a worked example using its withholding tables. We put its exact inputs into the formula it publishes a few lines later. The two answers differ by five cents, and we could not read a sentence on that page explaining the difference, so we report both without choosing one as correct.
“You pay Mary $300 each week. She claims three allowances on her Form IL-W-4: Two (2) allowances on Line 1 One (1) allowance on Line 2 She does not ask for any extra withholding on Line 3. You withhold $8.38 from her pay.”
The page's own formula applied to Mary's inputs
Allowances — (2 × $2,925.00) + (1 × $1,000.00) = $6,850.00; $6,850.00 ÷ 52 weekly pay periods = $131.73
Taxable wages — $300.00 − $131.73 = $168.27
$168.27 × 4.95% = $8.33 · the worked example above prints $8.38
This calculator uses the formula method, because it is the one we can show line by line and recompute. The $8.38 in the official example comes from the withholding tables, which the page presents as a separate method; we did not read a table row for those exact inputs, so we do not explain the five-cent difference. Both numbers are printed here as read or as computed, neither is presented as the single right answer, and no rounding rule of our own is claimed to be the state's rule. The three examples in the section above use the same formula method.
Four federal figures were read from IRS Publication 15 on 14 November 2026: Social Security at 6.2% for the employee with a $184,500.00 social security wage base limit, Medicare at 1.45% for the employee with no wage base limit, and 0.9% Additional Medicare Tax on wages paid to an employee in excess of $200,000.00 in a calendar year. Those are the only federal rates this calculator applies.
The pay-period divisor is what separates Example A from Example C. Both claim one Line 1 allowance worth $2,925.00 a year. Spread across 26 biweekly periods it removes $112.50 from the check; spread across 52 weekly periods it removes $56.25. That single change moves the Illinois taxable wages from $2,287.50 to $2,343.75 and the Illinois line from $113.23 to $116.02, on identical wages. Example B instead holds the divisor at 26 and adds allowances: five allowances across two tiers are worth $8,850.00 a year, or $340.38 on this check, which lowers the Illinois line to $101.95. The allowance values and the 4.95% rate in all three examples come from the Illinois source quoted above; the federal figures come from the IRS publication.
The year-to-date box affects only the federal lines. In Example C, $199,200.00 already on the books leaves none of this check under the $184,500.00 Social Security wage base, so that line falls to $0.00, while $1,600.00 of this check crosses $200,000.00 and produces $14.40 of Additional Medicare Tax. No federal income tax withholding, no filing status, no pre-tax deduction, no post-tax deduction and no employer-side amount is applied here. The result is what remains after the Illinois withholding line and the three employee FICA lines only; it is not a full take-home estimate.
We read the natural results for this phrase once, on 14 November 2026, in the browser we use for research. Nine results came back. Three answered with an access-denied response and are recorded as unreadable, not as zero. The counts below come from the six pages we could read, taken from our own notes of the phrases each page contained that day.
| What we looked for | Result across the six readable pages |
|---|---|
| The withholding formula printed and applied to a check | Six of six had none |
| A labelled worked example with the intermediate steps | Four of six had none |
| The $2,925 and $1,000 allowance values named together | Four of six had none |
| Social Security wage base named | Four of six had none |
| Annual allowances divided by pay periods named | Three of six had none |
| IL-W-4 Line 1 and Line 2 named as separate tiers | Two of six had none |
These are counts of phrases in those pages on that day, not a claim about what those sites do elsewhere, and we have not copied a sentence from any of them. All six readable pages state the 4.95% rate, so the rate itself is not what this page adds; three of the leading domains returned an access-denied response and are excluded from every count rather than treated as pages with nothing on them. Some of the pages we could read do print Illinois minimum wage figures, local tax details or federal bracket tables. None of those numbers appear on this page, because we could not read a primary source for them on 14 November 2026. What this page adds is narrow: the official formula made computable, its two allowance tiers and its pay-period divisor as separate inputs, three examples that hold the wages still so those two effects can be read on their own, both answers to the official example printed side by side, and a source table that says plainly which figures we could not verify.
This page quotes no local tax rate, no minimum wage, no overtime rule, no filing status, no federal income tax rate, no payment deadline and no penalty. Where we could not read a primary source for such a figure, the table below says “Source not found” rather than carrying a plausible-sounding number.
The 4.95% withholding rate, the $2,925 and $1,000 allowance values, the formula and the Mary example were all read from the 2026 IL-700-T Illinois Withholding Tax Tables on 14 November 2026. The page returned HTTP 200 and 124,893 bytes. We quote the sentences as they appear and apply the formula method; we do not paraphrase them into a rule.
We also tried the Illinois Department of Revenue home page, its individual income tax form index, its withholding form index, an IL-W-4 form file and two Illinois General Assembly addresses on the same day. The Department of Revenue pages answered but did not state a rate or an allowance value in readable text for us to use; the IL-W-4 form file returned HTTP 200 but we had no text extractor for that file on this machine, so we could not read it; both Illinois General Assembly addresses returned no response. Those attempts produced no readable primary text for a constitutional basis, a minimum wage or an overtime rule, so this page states none.
Federal FICA figures — Social Security at 6.2% up to a $184,500.00 wage base, Medicare at 1.45% with no wage base limit, and 0.9% Additional Medicare Tax on wages above $200,000.00 in a calendar year — were read from IRS Publication 15 on 14 November 2026 (HTTP 200, 624,753 bytes). They are the only federal rates and the only thresholds this calculator applies.
Source check, 14 November 2026
| Item | Source |
|---|---|
| 4.95% Illinois Income Tax withholding rate quoted verbatim above | 2026 IL-700-T Illinois Withholding Tax Tables, read 14 November 2026, HTTP 200 |
| $2,925 exemption allowance and Line 1 allowances | 2026 IL-700-T Illinois Withholding Tax Tables, read 14 November 2026, HTTP 200 |
| $1,000 Line 2 allowance value | 2026 IL-700-T formula, read 14 November 2026, HTTP 200 |
| Division by the number of pay periods in a year | 2026 IL-700-T formula, read 14 November 2026, HTTP 200 |
| Mary worked example and its $8.38 table-method result | 2026 IL-700-T Illinois Withholding Tax Tables, read 14 November 2026, HTTP 200 |
| Social Security 6.2% and $184,500.00 wage base | IRS Publication 15, read 14 November 2026, HTTP 200 |
| Medicare 1.45% with no wage base limit | IRS Publication 15, read 14 November 2026, HTTP 200 |
| Additional Medicare Tax 0.9% above $200,000.00 | IRS Publication 15, read 14 November 2026, HTTP 200 |
| Constitutional basis for a single rate | Source not found — both Illinois General Assembly addresses returned no response |
| IL-W-4 form instructions and who may claim an allowance | Source not found — form file returned HTTP 200 but no text extractor was available on this machine |
| Illinois minimum wage and any overtime threshold | Source not found — no primary text stating a figure or rule was readable |
| Local income tax, county tax or city tax on wages | Source not found — no primary text stating a figure was readable |
| Reason the table method gives $8.38 and the formula gives $8.33 | Source not found — not stated in the text we could read; no explanation offered on this page |
| Calculator arithmetic | Printed line by line above |
| Published | 14 November 2026 |
Because the 2026 IL-700-T formula we read on 14 November 2026 gives them different dollar values: $2,925 for each Line 1 allowance and $1,000 for each Line 2 allowance. Adding them into one count would lose that difference. The box labelled extra withholding is the Line 3 amount described in the same source.
The formula divides the combined annual allowance value by the number of pay periods in a year before subtracting it from the wages. One Line 1 allowance is $2,925.00 a year: that is $112.50 on a biweekly check with 26 periods, but $56.25 on a weekly check with 52. Example A and Example C show the same wages and the same allowance producing $113.23 and $116.02 because of that divisor alone.
From the 2026 IL-700-T Illinois Withholding Tax Tables page, which we read on 14 November 2026. It states “The Illinois Income Tax withholding rate is 4.95%” and prints a formula applying 0.0495 to wages after allowances. We print that sentence verbatim above and apply that rate. We did not read a primary source for a constitutional basis, a state bracket table or a different rate, and this page states none.
The official page prints a worked example using its withholding tables and, a few lines later, a formula method. Putting the example's inputs into that formula gives $8.33; the example prints $8.38. We could not read a sentence or a table row explaining the five-cent difference, so we show both numbers and the intermediate steps without declaring either one correct. This calculator uses the formula method because it is the one we can recompute line by line.
No. It is wages less the Illinois withholding line and the three employee FICA lines only. Federal income tax withholding, any pre-tax or post-tax deduction, and anything else on a real pay stub are not included, so the figure is not a full take-home estimate. It is labelled “after these lines” throughout for that reason.
Keeps four typed state and local withholding lines separate from the three federal FICA lines on one check, with sources printed for the names of those layers.
Keeps wages and reported tips as two lines on one check and adds them into one federal FICA base, with the text it quotes printed verbatim.
Prices a final check from wages, leave cash-out and the rate behind each line.
General information only — not tax, legal or payroll advice. Published 14 November 2026. No local tax rate, no minimum wage, no overtime rule, no federal income tax rate, no filing status, no payment deadline and no penalty is stated or applied on this page. The official text is quoted as read and is not interpreted here. The comparison above was read from the natural results for this phrase on 14 November 2026 and describes what those pages showed that day.