Tax Services in Chicago for Startups & Businesses
Chicago businesses run into a bookkeeping and tax problem tied to Illinois's home-rule sales tax structure: rates vary town to town, so a filing that doesn't separate revenue by jurisdiction can create a location-by-location reconciliation nobody planned for. C corporations also owe the state's replacement tax separately from regular corporate income tax.
Profitjets prepares your filings by jurisdiction, tracks replacement tax alongside your regular corporate return, and keeps everything ready for your CPA or our tax team whenever needed.
What Our Chicago Tax Services Cover
We build your tax strategy around your entity type and where you sell. From Illinois's replacement tax to home-rule sales tax, our team prepares the required forms and tracks every deadline.
Personal & pass-through tax
Illinois personal income tax (a flat 4.95%) on owner and pass-through income, prepared and filed.
Corporate income tax
Illinois's 9.5% (incl. replacement tax) corporate income tax, prepared and filed on time.
Sales & use tax
Registration, collection, and filing at Illinois's 6.25% base (up to ~11% with local) rate, with local rates applied.
Deadlines & estimates
Quarterly estimates, extensions, and notices handled year-round.
Multi-state & nexus
Operating beyond Illinois? We handle economic nexus and multi-state filings too.
Tax planning
Proactive planning to legally lower your Chicago tax bill before year-end.
Replacement Tax for Chicago C Corps
C corporations owe Illinois's replacement tax on top of the regular corporate income tax, a distinct calculation that's easy to overlook if you're used to a simpler corporate structure elsewhere.
Book a Free Consultation- Replacement tax calculated
- Corporate return filed for C corps
- Estimated payments scheduled
- Deductions maximized
- State and federal aligned
- Multi-entity ready
No Surprises on Home-Rule Sales Tax
Chicago's home-rule sales tax rate stacks on top of the state base, so the combined rate depends heavily on exactly where a sale happens, not just which county you're in.
Book a Free Consultation- Registration handled
- Home-rule rate applied correctly
- Taxable vs exempt tracked
- Multi-location businesses supported
- Returns filed on schedule
- Marketplace rules handled
How Our Chicago Tax Services Work
Understand Your Business & Tax Requirements
We start by learning about your business structure, industry, operations, and prior tax filings. We also review your current tax elections, including whether a Pass-Through Entity (PTE) tax election is already in place.
Review Your Financial Records & Tax History
We examine your bookkeeping, financial statements, and previous tax returns to identify issues related to Illinois replacement tax, home-rule sales tax, and other state or local compliance requirements.
Build a Tax Strategy Around Your Business
We create a tax plan tailored to your entity structure, income, and Illinois tax obligations. Where beneficial, we evaluate and implement the Pass-Through Entity (PTE) tax election to help improve your overall tax position.
Prepare & File Your Tax Returns
We prepare and file your Illinois corporate income tax returns, replacement tax filings, sales tax returns, and other required business tax forms accurately and on time.
Provide Year-Round Tax Support
Our support continues beyond tax season. We monitor estimated tax payments, filing deadlines, tax notices, and changes to Illinois or Chicago tax rules so your business remains compliant throughout the year.
Serving Small Businesses Across Chicago
We work remotely with businesses throughout Chicago, so you get the same dedicated team no matter which part of the city you're based in.
What Chicago Businesses Say
The Replacement Tax We Didn't Know Existed
"We filed our corporate return for two years without realizing Illinois adds a separate replacement tax. Profitjets caught it and now it's part of our annual filing."
Home-Rule Rates Finally Consistent Across Towns
"We sell into a few different home-rule towns and our old process used one flat sales tax rate everywhere. Profitjets got each jurisdiction registered at its actual rate."
PTE Election Made the Math Make Sense
"As an S-corp, we had no idea the PTE election could change how much our owners paid personally. Profitjets made the election and it's saved us real money since."
Chicago tax questions
Most Chicago businesses may need to manage Illinois income tax, corporate income tax, the Illinois replacement tax for C corporations, and applicable state and local sales tax obligations. We identify which taxes apply to your business and prepare every required return accurately.
Replacement tax is a separate tax that applies in addition to the state's regular corporate income tax for certain businesses. We calculate both taxes correctly and ensure your corporate tax filings meet all Illinois requirements.
Chicago businesses may need to collect sales tax that combines Illinois's state rate with applicable county, city, and home-rule taxes. We help determine the correct rates, register your business where required, and prepare accurate sales tax filings.
The Pass-Through Entity (PTE) tax election can provide tax benefits for eligible partnerships and S corporations, but it depends on your business structure and ownership. We evaluate your situation and recommend whether making the election is advantageous.
Yes. Our bookkeeping and tax teams work from the same accurate financial records throughout the year, reducing reconciliation issues and improving filing accuracy. For ongoing accounting support, our Chicago bookkeeping services help keep your books organized and tax-ready year-round.
Get Chicago Tax Filed Right, and Optimized
Book a free consultation and we'll map out exactly how we'd handle your Chicago business taxes.