The Illinois tax amnesty program ran from October 1 through November 17, 2025, and that window has closed.1Illinois Department of Revenue. FY 2026-01, 2025 Illinois Tax Delinquency Amnesty Act During the amnesty, individuals and businesses could pay the base tax on eligible debts and have all penalties and interest forgiven. If you had a qualifying liability and did not pay in full before the deadline, Illinois now charges you a doubled interest rate on that debt. A separate, narrower program for out-of-state sellers, the Remote Retailer Amnesty, is scheduled for August 1 through October 31, 2026.
The Deal Amnesty Offered
Under the Tax Delinquency Amnesty Act, the Illinois Department of Revenue waived all interest and penalties on an eligible tax debt when the taxpayer paid the underlying tax in full during the amnesty window.2Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 745 – Tax Delinquency Amnesty Act The Department also agreed not to pursue civil or criminal action for the covered periods.
Full payment was the whole requirement. Partial payments, credits, and refunds did not count toward satisfying it, and if the full tax was not paid by the closing date, any amnesty granted was automatically invalidated.
What the 2025 Program Covered
The 2025 amnesty applied to most taxes collected by the Department of Revenue, including individual and corporate income taxes, sales and use taxes, and excise taxes. Eligible liabilities were those for tax periods ending after June 30, 2018, and before July 1, 2024.1Illinois Department of Revenue. FY 2026-01, 2025 Illinois Tax Delinquency Amnesty Act
Several categories of debt were excluded:
- Taxes not collected by IDOR, including property, estate, franchise, and insurance taxes, and any local taxes paid directly to a local government.
- Motor Fuel Use Tax liabilities under the International Fuel Tax Agreement.
- Non-tax liabilities such as licensing fees, tire user fees, motor fuel violations, permits, and certain surcharges.
- Accounts with only penalties and interest and no underlying tax due.
Who Could Participate
Most individuals and businesses with eligible tax debts could take part, whether the liability was already on the Department’s books or had never been reported. The statute carved out one firm exclusion: anyone who was party to a criminal investigation or had a pending civil or criminal case for nonpayment, delinquency, or fraud related to any state tax.2Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 745 – Tax Delinquency Amnesty Act A taxpayer whose civil case was dismissed before the amnesty period ended could still participate.
Being under audit was not a disqualifier. Taxpayers whose audits were expected to finish before November 17, 2025, had to pay the full audit liability in the window. For audits that could not be completed in time, the Department allowed an estimate: file the return, pay the estimated tax in full, and accept the risk that any shortfall against the final audit figure would carry penalties and interest.1Illinois Department of Revenue. FY 2026-01, 2025 Illinois Tax Delinquency Amnesty Act Taxpayers with a protest pending or an active Board of Appeals matter could participate as well, but they had to withdraw the protest and pay in full.
What It Costs to Have Missed the Window
The Uniform Penalty and Interest Act imposes a doubled interest rate on any tax liability that was eligible for amnesty but went unpaid during the amnesty window. The statute sets the rate at 200% of the normal interest charge.3Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 735/3-2 The penalty applies automatically once the amnesty period closes and cannot be negotiated away afterward.
The doubled rate is not a one-time surcharge. It compounds, so the longer a debt sits, the faster the balance grows against what it would have been under normal interest. For significant liabilities, missing the window can mean thousands of dollars in avoidable charges.
Collection Tools the Department Can Use
Beyond the enhanced interest, the Department of Revenue has broad authority to collect unpaid tax debts.4Illinois Department of Revenue. Collection Process It can file a tax lien against your real estate or personal property, enforceable for 20 years. It can order your employer to deduct up to 15% of your gross pay. It can freeze and seize funds in your bank accounts, seize vehicles or business equipment, and suspend or block renewal of business, professional, sales tax, and liquor licenses. It can intercept your federal income tax refund through the IRS and publish your name on the delinquent taxpayer list. The Department must send a notice of the amount owed at least 10 days before initiating most of these actions, after which the timeline moves quickly.
What to Do Now If You Owe Illinois Tax
If you had an eligible liability and did not participate, the doubled interest rate is already in effect and cannot be reversed. Leaving the debt alone only makes it worse. A few paths remain:
- Pay in full. Log into MyTax Illinois to see the current balance, including enhanced interest, and clear it. Paying stops further accumulation.
- Request an installment agreement. The Department offers payment plans outside of amnesty. You will still owe the doubled interest on the outstanding balance, but a structured plan can head off wage levies, bank levies, and property seizure.
- Petition the Board of Appeals. If you believe a penalty was assessed incorrectly or that reasonable cause exists for your failure to pay, you can file Form BOA-1. This is a formal request for penalty abatement, not an amnesty substitute, and relief is not guaranteed.
None of these recreate the clean slate amnesty provided. The practical goal for anyone who missed the window is to resolve the debt quickly so the 200% interest rate does less damage.
The 2026 Remote Retailer Amnesty
One amnesty is still ahead. The Remote Retailer Amnesty Application will be available through MyTax Illinois from August 1, 2026, through October 31, 2026.5Illinois Department of Revenue. Illinois Tax Amnesty It targets out-of-state retailers that sell into Illinois but have not registered with the Department or collected the required sales tax. It is a separate program from the 2025 general amnesty, with its own eligibility rules, and it does not help an Illinois resident or an in-state business with income or sales tax arrears.
Will Illinois Offer Another General Amnesty?
Illinois has enacted four general amnesty programs since 2003, running in 2003, 2010, 2019, and 2025.2Illinois General Assembly. Illinois Compiled Statutes 35 ILCS 745 – Tax Delinquency Amnesty Act Each covered the tax periods that had opened up since the prior program closed, and each paired the forgiveness with the same doubled-interest penalty for eligible taxpayers who did not participate. The pattern has been roughly one program every six to seven years. Whether the legislature returns to the tool in the early 2030s is not settled, but the history suggests it is possible for taxpayers who missed the 2025 window and manage their debt in the meantime.