What Security Guards earn in St. Clair County, IL
According to the latest federal wage data for the St. Louis, MO-IL metropolitan area, the median pay for Security Guards in St. Clair County, IL is $42,600 a year, or $20.48 an hour. After federal income tax, Social Security, Medicare and state income tax, the paycheck shrinks to $34,390 a year, and rent, food and energy take another bite. The sections below walk through each step with the actual math for St. Clair County, IL.
The mean wage is $45,040, which is 5.7% above the median, a sign that a group of high earners lifts the average. The survey counts about 9,720 people working in this occupation across the St. Louis, MO-IL metropolitan area, so the estimate rests on a substantial pool of workers. St. Clair County, IL has roughly 253,694 residents, according to the population figures used by the rent data.
The salary range, from entry level to top earners
Pay for Security Guards in the St. Louis, MO-IL metropolitan area is not one number. The lowest-paid tenth of workers earn up to $32,460 a year ($15.61 an hour), while the highest-paid tenth earn $60,590 or more ($29.13 an hour). That is a gap of $28,130 between the bottom and the top of the scale. The middle half of workers falls between $36,450 at the 25th percentile and $48,130 at the 75th percentile. A top-tier earner makes 1.9 times what someone at the bottom makes, so experience, certification and employer all matter.
What the hourly rate looks like
Employers quote this occupation by the hour or by the year, so here are both: $20.48 an hour or $42,600 a year at the median for St. Clair County, IL. Before any deductions, that is $3,550 a month, $1,638 every two weeks and $819 each week. After taxes the same job pays $16.53 per hour of take-home income, which is the number that actually has to cover rent and groceries.
How pay in St. Clair County, IL compares
Compared with the Illinois average
A worker in this occupation in St. Clair County, IL earns $2,424 more than the Illinois average of $40,176, a premium of 6.0%. Over a year that premium is worth $2,424 before tax and roughly $1,957 after tax. Within Illinois, St. Clair County, IL already has the highest median we track for this job.
Compared with the national average
The national employment-weighted average for Security Guards is $39,162 across the contiguous United States. At $42,600, St. Clair County, IL pays $3,438 more, which is 8.8% above that benchmark. Keep in mind that a higher salary only helps if living costs do not rise faster, which is why the cost sections below matter as much as the headline number.
Where this job ranks in St. Clair County, IL
Among the 578 occupations with published wages in St. Clair County, IL, Security Guards ranks number 469 by median pay, ahead of about 19% of them. The best-paying occupation we track here is Software Developers at $129,030 a year, which is $86,430 more than the median for Security Guards.
From gross pay to take-home pay
Three separate tax bills sit between the gross salary and the bank account: federal income tax, FICA, and state income tax. For Security Guards earning the St. Clair County, IL median of $42,600, they add up to $8,210. The result is $34,390 of take-home pay a year ($2,866 a month), based on a single filer using the standard deduction.
Put another way, of every $100 earned, about $19 goes to taxes and $81 reaches the paycheck. The overall effective tax rate is 19.3%.
Federal income tax
After the $15,750 standard deduction, taxable income is $26,850. Federal brackets are marginal, so only the slice of income above each threshold is taxed at the higher rate; the last dollars of this salary fall in the 12% bracket. The resulting federal income tax is $2,984, an effective 7.0% of gross pay, well below the 12% marginal rate because the lower brackets are cheaper.
Social Security and Medicare (FICA)
Payroll taxes are a flat percentage of wages. Social Security takes 6.2% up to a wage base of $176,100, which costs $2,641 on this salary. Medicare takes 1.45%, or $618. FICA totals $3,259, which is 7.6% of gross pay.
State income tax in Illinois
Illinois income tax on this salary is $1,968 a year, or 4.6% of gross pay, after the state's own deductions and exemptions are applied. That is 66% of the federal income tax bill, and it comes out to $164 a month. Local taxes such as county or city income taxes are not included, so a few jurisdictions may withhold slightly more.
A cross-check with IRS data for St. Clair County, IL
IRS Statistics of Income data for St. Clair County, IL show an average adjusted gross income of $76,972 per return and an average effective federal income tax rate of 11.7% across all filers. Filers in the $25,000 to under $50,000 bracket, where this salary falls, paid an average of 4.6%, compared with the 7.0% estimated here for a single filer taking the standard deduction. Gaps between the two reflect filing status, dependents, credits and other income, none of which a single-person wage estimate includes.
Cost of living in St. Clair County, IL
Take-home pay only means something next to what life costs. We price four basics for one adult in St. Clair County, IL: a one-bedroom apartment, food, home energy and gasoline. All of them are converted to annual figures first, then compared with the $34,390 of take-home pay.
Rent
Housing is the largest line in most budgets. For St. Clair County, IL, HUD sets the Fair Market Rent for a one-bedroom unit at $1,104 a month ($13,248 a year), and at $1,349 for two bedrooms. For Security Guards, a one-bedroom absorbs 38.5% of take-home pay and 31.1% of gross pay.
Food
The USDA Thrifty Food Plan (August 2026) puts the cost of a nutritious home-cooked diet for an adult at about $3,436 a year, which is $286 a month or $66.07 a week. That equals 8.1% of gross pay for Security Guards in St. Clair County, IL. It is a thrifty budget with no restaurant meals, so treat it as a floor.
Energy and gasoline
Using Illinois residential prices from the Energy Information Administration and national household averages for consumption, electricity costs about $1,677 a year and other home energy such as natural gas about $434, for $2,110 in total. Gasoline in Illinois averages $3.18 per gallon; at about 463 gallons a year (11,106 miles at 24 miles per gallon) fuel adds $1,471.
What is left over
Rent, food, energy and gasoline cost $20,265 a year in St. Clair County, IL. Subtract that from $34,390 of take-home pay and $14,125 remains, which is $1,177 a month of breathing room. That margin equals 33.2% of gross pay, a comfortable cushion by common budgeting rules.
Can Security Guards afford to live in St. Clair County, IL?
The 30% rent guideline
A common rule of thumb says rent should stay under 30% of gross income. For a gross salary of $42,600 that ceiling is $1,065 a month. The one-bedroom Fair Market Rent of $1,104 is $39 over it, so rent breaks the guideline. Put as a wage, covering a one-bedroom at the 30% guideline takes $21.23 an hour; the median for Security Guards is $20.48, which is 4% below that mark. Another way to see it: at $16.53 of take-home pay an hour, a one-bedroom takes about 15.4 working hours every week.
Splitting a two-bedroom
Sharing a two-bedroom at $1,349 a month means $675 each. Compared with renting a one-bedroom alone, that saves $5,154 a year. With a roommate, the yearly margin after the basics becomes $19,279.
How fast you can save
At $1,177 a month of margin, building a $10,000 emergency fund would take about 9 months. Setting aside half of the margin stretches the same goal to about 18 months. These figures ignore interest, raises and any spending beyond the four basics.
Frequently asked questions about Security Guards pay in St. Clair County, IL
How much do Security Guards make per hour in St. Clair County, IL?
The median is $20.48 per hour, based on $42,600 a year over 2,080 hours. Hourly pay runs from about $15.61 at the 10th percentile to $29.13 at the 90th percentile.
How much do Security Guards take home after taxes in St. Clair County, IL?
After federal income tax, FICA and state income tax, the median salary of $42,600 becomes $34,390 a year. That is $2,866 a month, $1,323 every two weeks or $661 a week.
How much tax do Security Guards pay in St. Clair County, IL?
Total taxes are $8,210 a year, an effective rate of 19.3%: $2,984 federal income tax, $3,259 FICA and $1,968 Illinois income tax.
Do Security Guards earn more in St. Clair County, IL than elsewhere in Illinois?
Yes. The local median of $42,600 is +6.0% versus the Illinois average of $40,176, a difference of $2,424 a year.
Can Security Guards afford a one-bedroom apartment in St. Clair County, IL?
A one-bedroom costs $1,104 a month against take-home pay of $2,866, which is 38.5% of take-home pay. That does not meet the 30%-of-gross guideline, which allows up to $1,065 a month.
What is the monthly budget margin for Security Guards in St. Clair County, IL?
About $1,177 a month ($14,125 a year) remains after a one-bedroom apartment, food, home energy and gasoline, which together cost $20,265 a year.
What hourly wage covers a one-bedroom in St. Clair County, IL at the 30% guideline?
$21.23 an hour for a full-time schedule, calculated as the $13,248 annual rent divided by 0.30 and by 2,080 hours. The median for Security Guards is $20.48.
How we calculated these numbers
Wages are May 2025 medians from the Bureau of Labor Statistics Occupational Employment and Wage Statistics survey for the St. Louis, MO-IL metropolitan area; hourly-only values are annualized at 2,080 hours. Rents are HUD Fair Market Rents, food costs come from the USDA Thrifty Food Plan, and energy prices come from the Energy Information Administration. County-level tax statistics come from the IRS Statistics of Income.
Taxes use tax-year 2025 federal brackets, FICA rates and the Illinois rules for a single filer with wage income only. Figures are estimates for planning and comparison, not tax or financial advice, and they exclude local income taxes, benefits, retirement contributions and individual circumstances.