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2024 Tax Deadlines For Chicago Startups

Startup companies based in Chicago have several important tax deadlines in 2024, including the April 15th federal and Illinois tax return filings (which can be extended until October 15th). Additionally, Illinois and the federal government have various tax filings due on the dates listed below.

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Upcoming Chicago deadlines in 2024

2 tax events

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2 tax events

Total 27 Tax events for Chicago in 2024

Click The Links To Learn More About These Filings And 2024 Chicago Startup Tax Deadlines

  • For Chicago startups, IRS ACA Compliance 1094-B, 1095-B, 1094-C, and 1095-C filings are due (if paper-filing, due April 1 if eFiling). File Form 8809 for a 30-day extension.

  • IRS 30-day automatic extension: provide Form 1095-B and Form 1095C to employees.

  • Delaware Annual Franchise Report filing deadline. Your Chicago startup will pay a minimum of $400, which increases if you have significant funding.

  • Due date for Illinois Corporate Income Tax Return (can be extended to September 15).

  • Due date for Chicago startup employees to make contributions to Individual Retirement Accounts (IRAs) for 2023 (Employee Benefits).

  • File the R&D Tax Credit Form 6765 with your tax return. Can extend to October 15. We strongly recommend working with a qualified CPA to prepare this form in conjunction with your Form 1120 if you are a high-growth startup – if your company is going to be acquired by a major technology company, that company’s CFO will use a strong tax team to do due diligence on this.

  • Federal Quarterly Estimated Tax 1st installment (first quarter 2024).

  • C Corp Form 1120 Tax Return due. The Federal Form 1120 is the U.S. Corporation Income Tax Return, which the IRS has companies use to report their income, losses, credits, etc., and to figure the income tax liability of the corporation. Can extend the deadline to Oct. 15. All Chicago startups are required to file this Federal form by this deadline unless they file an extension.


Note: The federal tax deadline in 2024 falls on April 15. The federal extension deadline for 2024  is October 15. Most states usually follow the same calendar for state income tax returns

If your Delaware C-Corp Chicago funded startup needs tax help contact us today!


In 2021, Chicago tech companies raised more than $7.9 billion in growth capital, according to Crunchbase, an increase of $1 billion over 2020. The Illinois Department of Commerce and Economic Opportunity (DCEO) reports that almost 200,000 business startups were launched in Illinois in 2021. As a major center for business and commerce, Chicago offers startups a wide customer base of Fortune 500 and Fortune 1000 companies. The business culture is also diverse – Inc. reports that no single sector drives more than 14% of the local economy, 

The most important taxing authorities for companies based in Boston are: 

In 2024, Chicago-based companies have several important tax deadlines, including the April 15th federal and Illinois tax return filings (which can be extended until October 15th). Additionally, Illinois and the federal government have various tax filings due on the dates listed above.

Last Year's Tax Deadlines For Chicago Startups

2023 startup tax deadlines are supplied for reference purposes only, and should not be used when making decisions in 2024 or beyond. Always consult your tax professional, and see our disclaimer below.

View tax compliance dates for Atlanta, Austin, Boston, Chicago, Dallas, Miami, Mountain View, New York City, Palo Alto, Salt Lake City, San Francisco, San Jose, Santa Monica, Seattle, and Washington DC

How Much Does a Startup Tax Return Cost? Try Kruze Consulting's Tax Preparation Pricing Tool.

How much can your startup save in payroll taxes? Estimate your R&D tax credit using our free calculator.

Every startup is different and so are its tax compliance needs. This is only a guideline. Please consult your tax professional. IRS Circular 230 Disclaimer: To ensure compliance with IRS Circular 230, any U.S. federal tax advice provided in this communication is not intended or written to be used, and it cannot be used by the recipient or any other taxpayer for the purpose of avoiding tax penalties that may be imposed on the recipient or any other taxpayer. Copyright © Kruze Consulting

Check our 2024 Tax Deadlines For C-Corp Startups or Click for your customized tax compliance calendar by startup hub

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Concerned about your 2023 Tax Deadlines?
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