Illinois Tax Amnesty Program

Published: October 2025

If you have unfiled Illinois tax returns or outstanding tax debt, the Illinois Tax Amnesty Program offered by the Department of Revenue is offering you a rare opportunity through their Illinois tax amnesty program. This limited-time initiative allows you to resolve tax issues with significant financial benefits. Here’s what you need to know about the state’s 2025 Illinois tax amnesty program and how it could help you get back on track.

Tax amnesty is a limited-time program that allows taxpayers to settle outstanding tax obligations under more favorable terms than usual. Think of it as the state extending an olive branch—giving you a chance to come forward, clear your record, and move forward without the heavy burden of penalties that have been accumulating.

The 2025 Illinois tax amnesty program covers: - Non-filers: Individuals and businesses who haven’t filed required Illinois tax returns - Taxpayers with outstanding liabilities: Those who owe taxes to the state - Eligible tax periods: Any tax period ending after June 30, 2018 and before July 1, 2024

This Illinois tax amnesty program is designed to help taxpayers resolve longstanding tax issues without the burden of accumulated penalties.

The program applies to “certain outstanding tax liabilities” administered by the Illinois Department of Revenue. While the specific taxes included will be detailed by the Department, the Illinois tax amnesty program typically encompasses: - Income tax - Sales and use tax - Withholding tax - Other state-administered taxes

During the Illinois tax amnesty program period, eligible participants can expect: - Waiver of penalties: The penalties that have been accruing on your unpaid taxes can be eliminated - Potential interest relief: Depending on the program structure, some or all interest charges may be waived - Protection from prosecution: Amnesty programs typically provide immunity from criminal prosecution for tax evasion related to the covered periods - A fresh start: Clear your record and eliminate the stress of outstanding tax debt

Mark your calendar: October 1, 2025 through November 17, 2025

This is a short window—just over six weeks—to take advantage of this opportunity. Don’t wait until the last minute.

Illinois is also offering a separate amnesty program specifically designed for remote retailers who may not have been collecting and remitting Illinois sales tax.

This program is specifically for: - Out-of-state retailers selling to Illinois customers - E-commerce businesses - Online sellers who may have nexus in Illinois but haven’t been collecting sales tax

• Tax type: Retailers’ Occupation Tax (Illinois sales tax)
• Transaction period: January 1, 2021 through June 30, 2026
• Amnesty window: August 1, 2026 through October 31, 2026

Since the 2018 Wayfair decision, many remote sellers have struggled to understand their sales tax obligations. If you’ve been selling to Illinois customers but haven’t registered or remitted sales tax, the Illinois tax amnesty program for remote retailers offers a way to become compliant without the full weight of penalties.

The Illinois tax amnesty program can be an excellent opportunity, but it’s not the right choice for everyone. Here are some factors to consider:

• You have unfiled returns for the covered periods
• You have outstanding tax debt with mounting penalties
• You’re losing sleep over potential tax issues
• You want to avoid future collection actions
• You’re planning to sell your business or make other major financial moves that require clean tax records

• If you’re already in an installment agreement that’s working for you
• If you’re contesting the assessment on legitimate grounds
• If participating would create significant financial hardship

Tax problems don’t age like wine—they get worse over time. The Illinois tax amnesty program is relatively rare, and Illinois hasn’t offered one since their last program several years ago.

Start collecting: - Previous tax returns (filed and unfiled) - Financial records for the covered periods - Any correspondence from the Illinois Department of Revenue - Documentation of income and expenses

You’ll need to determine: - Which tax periods you need to address - The actual tax liability (what you truly owe) - Current penalties and interest (which may be waived)

This is not a do-it-yourself situation. The rules around the Illinois tax amnesty program can be complex, and mistakes could be costly. We can: - Determine if you qualify for amnesty - Calculate your true tax liability - Prepare any unfiled returns - Navigate the amnesty application process - Ensure you’re taking full advantage of the benefits - Help you develop a strategy to stay compliant going forward

The Illinois tax amnesty program is a genuine opportunity to resolve outstanding Illinois tax issues at a significant discount. The 2025 Illinois tax amnesty program runs for less than seven weeks, so time is of the essence.

At Nexus, we’ve helped numerous clients navigate amnesty programs, resolve tax debt, and get back on solid financial footing. If you think you might benefit from either of Illinois’s amnesty programs, don’t wait.

The cost of inaction—continued penalties, interest, potential liens, and the constant worry—far exceeds the cost of addressing the situation now.

Contact our team at Nexus to schedule a confidential consultation. We’ll review your situation, help you understand your options, and if the Illinois tax amnesty program is right for you, guide you through every step of the process.

Remember: The Illinois tax amnesty program window opens October 1, 2025 and closes November 17, 2025. That’s not much time to gather records, prepare returns, and submit your amnesty application.

Call Now For A Free Consultation – 720.878.2280

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If your business sells products online to customers in Illinois but you haven’t been collecting sales tax, the Illinois Remote Retailer Amnesty Program offers a valuable opportunity to resolve past tax liabilities without facing significant penalties. This special program runs from August 1, 2026 through October 31, 2026 and could save your business thousands of dollars in penalties and interest charges.

The Remote Retailer Amnesty Program was created as part of Illinois House Bill 2755, which Governor J.B. Pritzker signed into law in June 2025. This program is specifically designed for out-of-state retailers who sell tangible personal property to Illinois customers and may not have properly collected or remitted Illinois sales taxes in the past.

The program covers a significant lookback period from January 1, 2021 through June 30, 2026. During the three-month amnesty window, eligible businesses can pay their past tax obligations at simplified tax rates and receive complete forgiveness of all penalties and interest.

A remote retailer is defined as a business that sells tangible personal property to Illinois customers but does not maintain a physical presence in Illinois. This means you don’t have an office, warehouse, employees, or agents physically located in the state.

However, if you met certain sales thresholds during the eligibility period, Illinois law required you to collect and remit sales taxes. From January 1, 2021 through December 31, 2025, you were required to register and collect Illinois sales tax if you had either: - $100,000 or more in gross receipts from sales to Illinois customers, OR - 200 or more separate transactions with Illinois customers

These thresholds were calculated on a rolling 12-month basis. It’s important to note that starting January 1, 2026, Illinois eliminated the 200-transaction threshold. Going forward, only the $100,000 gross receipts threshold matters.

The amnesty program offers several significant advantages for businesses with past Illinois sales tax exposure:

The most immediate benefit is the complete waiver of all penalties and interest on your past tax liabilities. For businesses that have accumulated years of unpaid taxes, the penalties and interest can often exceed the original tax amount owed. By participating in the amnesty program, you only pay the actual tax liability.

Instead of calculating the exact tax rate for each of Illinois’s more than 1,400 local taxing jurisdictions, participants can use simplified statewide rates: - 9% for most taxable sales (items normally taxed at the state rate of 6.25%) - 1.75% for qualifying food and drugs (items normally taxed at the state rate of 1%)

These simplified rates represent a blended average of state and local taxes across Illinois. This dramatically reduces the complexity of calculating what you owe.

Normally, remote retailers must track and report sales by specific location and jurisdiction throughout Illinois. Under the amnesty program, you only need to report statewide totals. You don’t need to identify where each sale was delivered or break down sales by individual taxing jurisdiction. This eliminates the need to complete Illinois Form ST-2, which is notoriously burdensome and requires detailed locality reporting.

If you cannot pay the full amount owed during the amnesty period, Illinois allows participants to enter into an approved repayment plan with the Department of Revenue. This provides flexibility for businesses facing significant tax liabilities.

By voluntarily coming forward and resolving your tax obligations, you protect your business from potential civil or criminal prosecution related to these past tax liabilities.

An eligible transaction includes any sale of tangible personal property that you shipped or delivered to an address in Illinois during the eligibility period (January 1, 2021 through June 30, 2026). This covers standard retail sales of physical products.

The program does not cover digital products, services, or other non-tangible items. If your business sells both physical and digital products, only the physical product sales qualify for this amnesty program.

To participate in the Remote Retailer Amnesty Program, you must meet several requirements:

You must be registered with the Illinois Department of Revenue (IDOR) to participate. If you are not currently registered, you will need to register before you can take advantage of the amnesty program. Registration also means you commit to collecting and remitting taxes on a going-forward basis for any future Illinois sales that meet the threshold requirements.

All amnesty returns must be filed electronically during the amnesty period. Paper returns will not be accepted for amnesty purposes.

You must either pay your entire tax liability in full during the amnesty period, or enter into an approved repayment plan with IDOR. Partial payments without an approved plan do not qualify for penalty and interest forgiveness.

You cannot participate if you are currently party to a criminal investigation or have a pending civil or criminal case related to Illinois taxes. However, if a civil case is dismissed before the end of the amnesty period, you may still be able to participate.

While the amnesty program offers substantial benefits, there are some important factors to consider before participating:

The amnesty program covers a five and half year lookback period (January 2021 through June 2026). Illinois’s voluntary disclosure program typically only requires you to pay taxes for the most recent four years. If you have exposure dating back to 2021, the amnesty program could result in a higher total tax payment than a voluntary disclosure agreement, even with penalty and interest forgiveness.

The simplified 9% tax rate may actually be higher than the combined state and local rate for some jurisdictions in Illinois. If you collected a lower rate (or should have collected a lower rate), you might end up paying more under the amnesty program than you would have owed under normal circumstances.

However, there is an important protection: if you actually collected a higher tax rate from your customers than the simplified rate, you must remit whichever is greater (the simplified rate or the amount you collected). This prevents businesses from keeping taxes they collected from customers.

Illinois uses different sourcing rules for in-state retailers versus remote retailers. Remote retailers must use destination-based sourcing (tax based on where the customer is located) while in-state retailers often use origin-based sourcing (tax based on where the seller is located). Several legal challenges argue this creates unconstitutional discrimination between in-state and out-of-state sellers.

By participating in the amnesty program, you may waive your ability to later challenge the constitutionality of Illinois’s discriminatory sourcing rules for the time period covered by the amnesty. This is an important consideration if you believe these rules unfairly disadvantage your business.

The program doesn’t start until August 2026. If Illinois audits your business before then, you could face penalties and interest that could have been avoided. Some businesses with significant exposure may want to consider the general amnesty program that ran in fall 2025 (if you qualify and act quickly) or pursue a voluntary disclosure agreement to resolve issues sooner.

Businesses with Illinois sales tax exposure have several potential paths forward:

Illinois offers a voluntary disclosure program for businesses that come forward before being contacted by the state. Benefits include a limited four-year lookback period and penalty abatement, though interest is still charged. This option is available now rather than waiting until August 2026.

Illinois ran a general tax amnesty from October 1 through November 17, 2025, covering all taxes administered by IDOR for periods ending after June 30, 2018 and before July 1, 2024. If you have exposure during this earlier period and can act immediately, this might still be an option, though the window has already closed.

This program provides the longest lookback period but also offers simplified reporting and rates specifically designed for remote retailers. It’s ideal for businesses that want to resolve all their Illinois exposure in one comprehensive settlement.

If you think your business might benefit from the Remote Retailer Amnesty Program, here’s what you should do:

Calculate your Illinois sales for each year from 2021 through 2025. Determine whether you met the nexus thresholds during any 12-month period. Don’t forget that prior to 2026, the 200-transaction threshold also applied.

Use the simplified rates (9% for most items, 1.75% for food and drugs) to estimate what you would owe under the amnesty program. Compare this to what you might owe under a voluntary disclosure agreement.

Consider the likelihood that Illinois might discover your exposure through other means (such as marketplace facilitator data, audits of customers, or data sharing agreements with other states). Higher risk situations may justify resolving the issue proactively.

Decide whether it makes sense to wait for the remote retailer amnesty in August 2026, pursue a voluntary disclosure now, or explore other options. Consider factors like your cash flow situation, the size of your potential liability, and your risk tolerance.

The decision whether to participate in amnesty, pursue voluntary disclosure, or take another approach depends on your specific situation. A qualified tax professional can help you analyze your exposure, calculate your potential liability under different scenarios, and develop a strategy that minimizes your overall tax cost while protecting your business from future liability.

It’s also important to understand that Illinois has made significant changes to its nexus rules going forward. As of January 1, 2026, the 200-transaction threshold has been eliminated. This means remote sellers only need to monitor their gross sales into Illinois.

If you previously registered for Illinois sales tax only because you exceeded the 200-transaction threshold (but not the $100,000 threshold), you may be able to deregister for Illinois sales tax going forward. The Illinois Department of Revenue will automatically update some registrations, but you should review your situation to ensure your registration status correctly reflects your ongoing obligations.

The Illinois Remote Retailer Amnesty Program represents a rare opportunity for online sellers to resolve past tax liabilities on favorable terms. The complete forgiveness of penalties and interest, combined with simplified reporting requirements, makes this an attractive option for many businesses.

However, the program is not the right choice for everyone. The extended lookback period, potentially higher tax rates in some situations, and the waiver of constitutional challenges mean you need to carefully evaluate your options before deciding to participate.

The program runs from August 1 through October 31, 2026. This gives you time to thoroughly analyze your situation, but don’t wait until the last minute. Gathering the necessary sales data, calculating your liability, and preparing accurate returns takes time.

We recommend starting your evaluation now. Review your Illinois sales history, estimate your potential liability, and consult with tax professionals who can help you determine the best course of action for your specific situation. Whether the amnesty program is right for you or not, understanding your Illinois sales tax obligations and resolving any past issues will protect your business and provide peace of mind going forward.

This article is provided for informational purposes only and does not constitute tax or legal advice. Call Now For A Free Consultation – 720.878.2280