CPA Services for Chicago Business Owners

Entity choice sets the tax rules you live under for years, so it is the first thing we work through together. A sole proprietor or single-member LLC reports business profit on Schedule C and pays self-employment tax on the whole net figure. A partnership files Form 1065 and passes income out to the owners on a Schedule K-1. An S corporation files Form 1120-S and can split owner pay between wages and a distribution, which is where a lot of the planning value sits. A C corporation files Form 1120 and pays a flat 21 percent at the entity level, then owners are taxed again when money comes out as a dividend. The IRS lays out the choices at Business Structures, and you elect S status by filing Form 2553 or change your default classification with Form 8832.

Here is the piece that catches Chicago owners off guard. Illinois runs a flat personal income tax of about 4.95 percent, and on top of that it charges the Personal Property Replacement Tax on pass-through entities. Partnerships and S corporations owe replacement tax at roughly 1.5 percent of Illinois net income, and a traditional C corporation owes it at 2.5 percent. So the federal reason to be an S corporation, saving on self-employment tax, gets shaved a little at the state line because that same S corporation now writes an Illinois replacement tax check that a Schedule C filer never sees. Chicago layers on its own local taxes as well, so the city adds a third level of cost to weigh. You can read the state rules at the Illinois Department of Revenue.

Work an example. Say your business nets 150,000 dollars. As a sole proprietor you pay self-employment tax on nearly all of it, close to 21,000 dollars before the income-tax layer. Flip to an S corporation, pay yourself a defensible wage of 80,000 dollars, and only that 80,000 carries payroll tax, which runs about 12,240 dollars. The 70,000 dollar distribution skips self-employment tax. Federal savings land near 8,700 dollars. Then Illinois replacement tax of about 1.5 percent on the entity income, roughly 2,100 dollars, comes back the other way. You are still well ahead, but a good number is the net of both, not the federal number alone. That is the whole point of running the model before you sign anything.

The common mistake is chasing the S election for the payroll savings and forgetting the running cost. An S corporation means a real payroll system, a separate return, and a reasonable-wage position you can defend if the IRS asks. If the business only nets 30,000 dollars, the extra filing fees and payroll admin can eat the benefit whole, and you would have been better off as a plain Schedule C filer. We model the breakeven before you elect, not after, and we look at where the business is heading over the next few years rather than just this one. A useful reference on your ongoing duties is the IRS page on operating a business, which walks through the recordkeeping and filing that come with each structure.

This is exactly the kind of decision our tax strategy consulting work is built around, paired with clean bookkeeping so the numbers behind the election are real and not a guess. Getting a working owner set up right also means a fresh Employer Identification Number, which you request on Form SS-4 before payroll starts. As your revenue grows, the right answer can shift, so we revisit entity choice every year rather than treating it as a one-time form you file and forget.

An S corporation owner who works in the business has to take a reasonable wage before pulling profit as a distribution. The reason is simple. Wages carry Social Security and Medicare tax and distributions do not, so the temptation is to pay yourself almost nothing in salary and take everything as a distribution. The IRS knows the game, and reasonable compensation is one of the first things an examiner tests on an S corporation return. The starting point is the guidance behind Form 1120-S and the broader rules on employment taxes. Get the wage wrong on the low side and the agency can recharacterize distributions as wages, then add back tax, penalty, and interest going back several years.

There is no single formula, but the factors are well established in the case law and IRS guidance. What would you have to pay someone else to do your job, what are your duties and hours, what is your training and experience, and what do comparable businesses pay for that role. A working owner who is the rainmaker, the operator, and the public face of the company cannot claim a clerk-level salary and expect it to hold. We document the wage with real market data for the Chicago area and the specific trade, then keep that support in the file where it belongs. The wage runs through payroll, which means Form 941 each quarter, federal unemployment on Form 940 once a year, and a year-end Form W-2 for yourself.

Take a concrete case. Your S corporation nets 200,000 dollars before owner pay. You are the only worker and you do everything from selling to delivering to the books. A salary of 45,000 dollars would look thin to any examiner for that profit and that role. A wage around 95,000 dollars, backed by market data for a general manager who also sells and delivers the work, is defensible, and the remaining 105,000 dollars can come out as a distribution. On that 95,000 dollar wage the combined Social Security and Medicare tax runs about 14,535 dollars. Lowball the salary to 45,000 and you might save near 7,650 dollars in the short run, then lose far more if the wage is reset on exam and penalties stack on top.

The common mistake is picking a round number with nothing behind it, or paying zero salary in a clearly profitable year. Both are red flags that invite a second look. Illinois adds its own wrinkle, because the S corporation still owes Personal Property Replacement Tax of about 1.5 percent on Illinois income regardless of how you split wage and distribution, so the state does not reward shifting dollars out of payroll the way the federal side does. On the flat 4.95 percent Illinois income tax the split does not move the needle much either, which surprises owners who expect the state to mirror the federal savings. A cpa for business owners in Chicago should show you the salary support, run the payroll correctly, and keep the documentation ready before a notice ever arrives.

Our tax strategy consulting sets the wage with evidence you can point to, and our bookkeeping keeps the payroll and distribution records straight all year so nothing has to be reconstructed later. If a wage question ever does turn into a letter, the IRS page on understanding your notice explains what the agency is asking for. Reasonable compensation is a moving target as the business grows, so plan to revisit the figure annually rather than setting it once and letting it drift.

Once you earn money that is not run through withholding, the tax system expects you to pay in during the year rather than in one lump at filing. Business owners do this with quarterly estimated payments. For the 2026 tax year the due dates are April 15, June 15, and September 15 of 2026, then January 15 of 2027. You figure the amount on Form 1040-ES, and the IRS explains the whole system on its estimated taxes page. Miss the pace and you owe an underpayment penalty computed on Form 2210, which is really interest for paying late, so it grows the longer the shortfall sits unpaid.

The safe-harbor rules tell you how much you must pay in to avoid that penalty. Pay at least 90 percent of the current year tax, or 100 percent of last year tax, and you are protected. If your prior-year adjusted gross income was over 150,000 dollars, that second figure rises to 110 percent of last year tax. Hitting a safe harbor is the practical goal, because it removes the penalty even if you end up owing more at filing time. The point of aiming at last year number is that you already know it, so you are not betting on a forecast of a year that is only half over. You can send payments directly through IRS Direct Pay or schedule them all at once from the main payments page.

Chicago owners have to remember the state layer sits right alongside the federal one. Illinois wants its own estimated payments at the flat rate of about 4.95 percent, filed with the Illinois Department of Revenue, and a pass-through entity separately handles Personal Property Replacement Tax. So a full quarterly number for a Chicago owner is federal income tax, self-employment tax, and Illinois income tax stacked together, plus any city tax that applies to the business. Leaving the Illinois piece out is a classic way to look on track federally and still owe the state a real balance in April.

Here is the math. Your business will net about 120,000 dollars this year. Federal income tax plus self-employment tax might run near 30,000 dollars, and Illinois at 4.95 percent adds roughly 5,940 dollars. That is about 35,940 dollars for the year, or close to 8,985 dollars each quarter. Set that money aside as it comes in rather than hoping it will be there later. The common mistake is spending the gross, treating a good sales month as fully spendable cash, then scrambling at the deadline with nothing set aside. Owners who move a fixed percentage of every deposit into a separate tax account almost never get burned, and they sleep better in April.

We handle this inside our tax strategy consulting, and our bookkeeping gives us the live profit figure to size each payment correctly instead of guessing. If a payment is missed and a penalty notice shows up, the same records let us respond fast, and the general rules on paying in are covered in Publication 505 on withholding and estimated tax as well as the IRS small business hub. Estimates should be trued up mid-year as your income becomes clearer, so treat the four vouchers as a plan you adjust, not a fixed bill carved in stone.

The qualified business income deduction lets many owners of pass-through businesses deduct up to 20 percent of their qualified business income. It applies to sole proprietors, partnerships, and S corporations, and you compute it on Form 8995 or the longer Form 8995-A when your income is higher. This is a federal deduction that lowers taxable income without you spending a dollar, which makes it one of the better breaks a business owner gets. The general rules for how business income is reported sit on the IRS page for small businesses and self-employed taxpayers, and the income itself flows from the return you file for your entity type.

Two things narrow the deduction as income rises. First, above the income thresholds the deduction gets limited by how much W-2 wages the business pays and, for some businesses, the basis of its property. Second, a specified service trade or business, which includes fields like health, law, accounting, and consulting, phases out of the deduction entirely once income climbs high enough. This is where paying yourself interacts with the deduction in a way that surprises people. For an S corporation owner, the wage you take is a W-2 wage that can support the deduction at higher income, but that same wage is not itself qualified business income, so pushing the salary too high can shrink the 20 percent base you are trying to protect.

Run the numbers. Suppose your S corporation produces 160,000 dollars of qualified business income after a reasonable 90,000 dollar wage reported on Form W-2. Twenty percent of that 160,000 is a 32,000 dollar deduction, assuming you are under the wage limit. If you are married filing jointly and comfortably below the threshold, that deduction can cut federal tax by several thousand dollars depending on your bracket. Set the wage carelessly, either too high so the qualified income shrinks or too low so it fails the reasonable-compensation test, and you leave money on the table or invite a different problem entirely.

The common mistake is treating QBI as automatic. It is not. It depends on your total taxable income, your filing status, the wages your business pays, and whether your field is a specified service business. Illinois does not offer a matching deduction, so QBI helps your federal number while your Illinois tax still runs on the flat 4.95 percent of Illinois income with no 20 percent haircut, and the Personal Property Replacement Tax on a pass-through is untouched by it too. A cpa for business owners in Chicago coordinates the salary decision and the QBI math so the two do not quietly work against each other over the year.

This coordination is core to our tax strategy consulting, supported by bookkeeping that cleanly separates the numbers the deduction depends on, since a messy set of books can understate the very income figure the 20 percent runs on. The rules also trace back to how your entity is structured, so the IRS page on business structures is worth a look when you plan. QBI rules have a history of legislative change, so we plan each year on current law rather than assuming last year carries forward. If you want a modeled projection for your situation, you can Request Private Consultation and we will build it around your real figures.

Hiring your first employee turns you into a tax collector for the government, and the duties start on day one. You need an Employer Identification Number, which you request on Form SS-4. Each new hire fills out Form W-4 so you know how much federal income tax to withhold from each paycheck. From then on you withhold income tax and the employee share of Social Security and Medicare, add the employer match, and deposit those amounts on a schedule the IRS sets based on your payroll size. The overview of these obligations lives on the IRS page for employment taxes, which is the map for everything that follows.

The filing rhythm has a few fixed points you cannot skip. Payroll tax gets reported quarterly on Form 941. Federal unemployment tax is reported once a year on Form 940. After year-end you give each worker a Form W-2 and send copies to the Social Security Administration. Miss a deposit deadline and the penalty climbs by tiers based on how late you are, and the trust-fund portion, the money you withheld from employees, can be collected from you personally as the responsible person. That personal exposure is why payroll is the one area where being a little late gets expensive fast, and why we automate the deposits rather than leaving them to memory.

Illinois piles its own duties on top of the federal ones. You register with the Illinois Department of Revenue to withhold the flat state income tax of about 4.95 percent from wages, and you register with the state for unemployment insurance. Chicago also reaches employers through assorted local taxes depending on your size and activity, so the city can be a separate line to track. Your true payroll stack in Chicago is federal withholding and payroll tax, Illinois withholding, state unemployment, and any applicable Chicago local tax, each on its own calendar and its own account.

Here is a sizing example. You hire one worker at 52,000 dollars a year. You withhold their income tax and their 7.65 percent share of Social Security and Medicare, and you pay a matching 7.65 percent, which is about 3,978 dollars of employer payroll tax you owe on top of the wage. Budget for that employer share, because owners routinely quote themselves the salary number and forget the roughly 8 percent that rides along with every hire. The other common mistake is treating a worker as a 1099 contractor to dodge payroll when the person is really an employee by how you control the work. That misclassification is one of the fastest ways to draw a costly assessment with back taxes and penalties.

We set up and run this through our bookkeeping function and keep the strategy aligned through tax strategy consulting so the payroll cost is planned, not a surprise that dents your margin. Good records also protect you, so keep timecards, pay registers, and deposit proof per the IRS guidance on recordkeeping. As you add more staff, the deposit schedule and reporting can change, so we review your payroll setup each time your headcount grows rather than waiting for a problem to force the issue.