Home / Illinois / Boilermaker / Cook County group

Illinois · Boilermaker · 12 counties

Boilermaker prevailing wage, Cook County group, Illinois (12 counties)

IDOL sets the same boilermaker rates, row for row, in 12 counties: Boone, Cook, DeKalb, DuPage, Grundy, Kane, Kankakee, Kendall, Lake, McHenry, Will and Winnebago. Every figure on this page applies in each of them.

$103.35an hour, base wage + fringe benefits (our sum)

$62.06 base wage + $41.29 fringe benefits · Building

On Illinois public works in each of these 12 counties, a boilermaker must be paid at least $103.35 an hour: a $62.06 base wage plus $41.29 in fringe benefits for health and welfare, pension, vacation, training and other insurance. IDOL lists each part but prints no total, so $103.35 is our sum of its columns. Overtime after 8 hours a day, Monday to Friday, is 2.0 times the base wage.

IDOL's schedule for each of these counties, posted October 19, 2026, for work performed on or after October 19, 2026. Checked against labor.illinois.gov on October 24, 2026.

Base wage and fringe benefits: $62.06 + $41.29

The base wage is the taxable hourly wage. The other lines are the fringe benefits IDOL lists for each hour: health and welfare, pension, vacation, training, and "other insurance", which IDOL's legend defines as the "employer hourly cost for any other type(s) of insurance".

Base wage (taxable)	$62.06
Health and welfare	$7.07
Pension	$27.81
Training	$3.69
Other insurance	$2.72
Base + fringes (our sum; IDOL prints no total)	$103.35

Foreman base wage: $67.64 an hour, with the same fringe benefits.

Overtime

When	Multiple of base
Monday to Friday, after 8 hours a day	2.0× $124.12
Saturday, every hour	2.0× $124.12
Sunday, every hour	2.0× $124.12
Holidays, every hour	2.0× $124.12

IDOL prints a multiple, not a dollar rate. Its legend: “Unless otherwise noted, OT pay is required for any hour greater than 8 worked each day, Mon through Fri. The number listed is the multiple of the base wage.” The figure under each multiple is the base wage times that multiple.

IDOL's schedule also has two columns headed “Add OT 1.5x owed” and “Add OT 2.0x owed”. For this row they read $0.00 and $40.50. IDOL's legend doesn't define them, so ask IDOL (217-782-1710) before you rely on them.

Labor cost calculator: a crew's straight-time wage and fringe cost over the job dates.

When does this rate change?

Illinois rates don't lock at bid. When IDOL revises a rate, “the revised rate shall apply to such contract” from its effective date, including jobs already under way (820 ILCS 130/4(l)).
A missing notice is no excuse. A public body's failure to send the new rates “does not relieve the contractor of the duty to comply”, or of paying back wages (820 ILCS 130/4(g), (j)).
IDOL surveys in June and must publish the year's schedule by July 15 (820 ILCS 130/9), then posts revisions through the year. In 2026 its postings took effect on Jan 15, Mar 2, Apr 15, May 21, Jul 15, Aug 15, Sep 21 and Oct 19, 2026. Each posting replaces all 102 county schedules.
This page uses the posting for work performed on or after October 19, 2026 (IDOL current rates; older postings are on IDOL's historical rates page).

Davis-Bacon boilermaker rates in these counties

The counties share IDOL's rates, but not always the same federal wage determination. When a contract requires both the state rate and the Davis-Bacon rate, paying the higher of the two meets both. The contract documents say which apply.

County	Federal classification	Base + fringe	WD	vs IDOL
Boone County	BOILERMAKER (BOONE, DE KALB, & WINNEBAGO COUNTIES)	$91.64	IL20260001 Mod 6	IDOL +$11.71
Cook County	BOILERMAKER	$91.64	IL20260009 Mod 3	IDOL +$11.71
DeKalb County	BOILERMAKER (BOONE, DE KALB, & WINNEBAGO COUNTIES)	$91.64	IL20260001 Mod 6	IDOL +$11.71
DuPage County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
Grundy County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
Kane County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
Kankakee County	BOILERMAKER	$91.64	IL20260006 Mod 1	IDOL +$11.71
Kendall County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
Lake County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
McHenry County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
Will County	BOILERMAKER (DU PAGE, GRUNDY, KANE, KENDALL, LAKE, MCHENRY, AND WILL COUNTIES)	$91.64	IL20260008 Mod 3	IDOL +$11.71
Winnebago County	BOILERMAKER (BOONE, DE KALB, & WINNEBAGO COUNTIES)	$91.64	IL20260001 Mod 6	IDOL +$11.71

Holidays

IDOL's schedule for each of these counties: “The following list is considered as those days for which holiday rates of wages for work performed apply: New Years Day, Memorial Day, Fourth of July, Labor Day, Thanksgiving Day, Christmas Day and Veterans Day in some classifications/counties. Generally, any of these holidays which fall on a Sunday is celebrated on the following Monday. This then makes work performed on that Monday payable at the appropriate overtime rate for holiday pay. Common practice in a given local may alter certain days of celebration. If in doubt, please check with IDOL.”

Holiday work is paid at the holiday multiple in the overtime table (2.0× the base wage for this row).

How the Cook County group compares

The main boilermaker rate in every county that has one, and how the pay splits here and in the nearest counties. All bars use the same scale.

Every county in Illinois

Cook $103.3533

$84.16Bureau$103.35Boone

CookNearby: Boone $103.35, DeKalb $103.35, DuPage $103.35, Grundy $103.35, Kane $103.35, Kankakee $103.35, Kendall $103.35, Lake $103.35, McHenry $103.35, Will $103.35, Winnebago $103.35Each column is a group of counties with about the same main rate; its height is how many. 0 counties pay more than Cook, 11 the same, 90 less.

Base wage and fringe benefits, nearby

Cook County groupbase $62.06$103.35
DuPage Countybase $62.06$103.35
Will Countybase $62.06$103.35
LaSalle Countybase $50.46$84.16

Which county is in which boilermaker group

Every Illinois county with a boilermaker rate. Counties IDOL treats alike share one page; the rest have their own. You pay the rate for the county where the work is done.

Counties	Main classification	Base wage	Total rate
Cook County group, 12 counties: Boone, Cook, DeKalb, DuPage, Grundy, Kane, Kankakee, Kendall, Lake, McHenry, Will, Winnebago	Boilermaker	$62.06	$103.35
Madison County group, 56 counties: Adams, Alexander, Bond, Brown, Calhoun, Cass, Christian, Clark, Clay, Clinton, Coles, Crawford, Cumberland, Douglas, Edgar, Edwards, Effingham, Fayette, Franklin, Gallatin, Greene, Hamilton, Hardin, Jackson, Jasper, Jefferson, Jersey, Johnson, Lawrence, Macon, Macoupin, Madison, Marion, Massac, Menard, Monroe, Montgomery, Morgan, Moultrie, Perry, Piatt, Pike, Pope, Pulaski, Randolph, Richland, Saline, Sangamon, Scott, Shelby, St. Clair, Union, Wabash, Washington, White, Williamson	Boilermaker	$48.00	$84.84
Wayne County	Boilermaker	$48.00	$84.84
Champaign County group, 33 counties: Bureau, Carroll, Champaign, De Witt, Ford, Fulton, Hancock, Henderson, Henry, Iroquois, Jo Daviess, Knox, LaSalle, Lee, Livingston, Logan, Marshall, Mason, McDonough, McLean, Mercer, Ogle, Peoria, Putnam, Rock Island, Schuyler, Stark, Stephenson, Tazewell, Vermilion, Warren, Whiteside, Woodford	Boilermaker	$50.46	$84.16

3 groups of counties with identical IDOL rates, and 1 county with rates of its own.

Illinois boilermaker prevailing wage by county, with a map

Are you being paid this rate?

Add your base wage to what your employer pays into health, pension and other plans for you, and compare it with $103.35. Your contractor has to post the rates on the job site or give you written notice of them (820 ILCS 130/4(n)), and file a certified payroll with IDOL by the 15th of each month for the month before (820 ILCS 130/5).

A worker paid less than the prevailing rate can sue for the difference (820 ILCS 130/4(g)).

Source

Illinois Department of Labor, prevailing wage rates, posted October 19, 2026. IDOL prints one schedule per county:

Boone County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Boone.pdf, page 1
Cook County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Cook.pdf, page 1
DeKalb County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/DeKalb.pdf, page 1
DuPage County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/DuPage.pdf, page 1
Grundy County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Grundy.pdf, page 1
Kane County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Kane.pdf, page 1
Kankakee County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Kankakee.pdf, page 1
Kendall County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Kendall.pdf, page 1
Lake County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Lake.pdf, page 1
McHenry County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/McHenry.pdf, page 1
Will County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Will.pdf, page 1
Winnebago County: labor.illinois.gov/content/dam/soi/en/web/idol/laws-rules/conmed/documents/fy27/20261019/Winnebago.pdf, page 1

Each figure is read from IDOL's PDF and checked by a second, separate reader. IDOL prints no total; ours is re-added independently. How we check · Download every Illinois rate as CSV · Report an error