Illinois has introduced several tax policy changes in 2025, focusing largely on corporate taxation, consumption taxes, and enforcement mechanisms rather than broad changes to personal income tax rates. While many of the reforms aim to modernize the state’s tax system and improve revenue collection, they also have direct and indirect effects on residents and small businesses.
Income Taxes: Still a Flat Rate
Illinois continues to maintain a flat income tax rate of 4.95%, which applies uniformly to all individual taxpayers regardless of income level. The proposed graduated income tax amendment, which would have introduced higher rates for high-income earners, was rejected by voters in 2020, and no follow-up proposals have succeeded.
There has been no increase in income tax rates for high earners since then. The state’s income tax system remains flat, and the 2025 tax changes do not include any adjustments to individual or joint filer income tax brackets.
Property Taxes: Still a Local Issue
Illinois continues to rank among the highest in the nation for property tax burdens, but there have been no statewide changes to property tax law in 2025. The Property Tax Extension Limitation Law (PTELL) remains the primary mechanism for capping property tax increases, limiting annual growth to the lesser of 5% or the rate of inflation (CPI) — but this applies only to non-home rule taxing districts.
In 2025, some local governments have made independent adjustments to tax rates, but these changes are not statewide. For example, some municipalities have increased sales tax rather than property tax to fund local initiatives.
Sales Taxes and Digital Services
Illinois has not enacted a broad expansion of sales tax to cover digital services like streaming or subscription platforms in 2025. While enforcement has tightened on remote sellers and marketplaces, and existing laws apply sales tax to some digital goods, there has been no new legislation this year expanding that scope to general digital services.
However, in 2025, the state has broadened the tax base in several key areas:
- Short-term rentals (e.g., Airbnb, VRBO) are now explicitly subject to state and local taxes.
- Remote seller thresholds have been tightened to require registration and tax collection for businesses with $100,000 or more in Illinois sales.
- Enforcement on out-of-state marketplace facilitators has increased.
Key Tax Changes to Watch Out For:
- No change to the flat 4.95% income tax rate.
- Continued enforcement of local property tax caps via PTELL (not a new law).
- New taxes/expanded enforcement on:
- Short-term rentals
- Sports betting
- Nicotine and vape products
- Telecommunications
- Increased compliance thresholds for remote sellers.
- Corporate income tax changes impacting multistate businesses.
Corporate Tax Changes: Technical but Significant
Though not directly impacting most individual taxpayers, corporate tax reforms in 2025 are significant and may indirectly affect employment, prices, and economic growth. Major changes include:
- Adoption of the Finnigan method for apportioning income, which may increase tax obligations for certain multistate businesses.
- Reduction in GILTI (Global Intangible Low-Taxed Income) deduction from 50% to 15%, aligning more with federal treatment.
- Changes to addback provisions, tightening how certain deductions are handled.
These adjustments aim to close corporate loopholes and improve equity in business taxation, though critics argue they could make Illinois less competitive.
Impact on Small Businesses
Small businesses in Illinois face a mixed environment in 2025. While there are no major personal income tax hikes affecting sole proprietors or pass-through entities, the expanded enforcement on sales taxes — especially for remote sellers and gig-based services — may increase administrative and compliance burdens.
Those in industries like hospitality, rental services, vaping, and gaming may feel the effects of new targeted taxes, while corporate-level changes could trickle down to service providers and subcontractors.
At the same time, Illinois has expanded some tax credits and deductions for small businesses, particularly those involved in job creation or hiring in underserved areas.
Conclusion
Illinois’s 2025 tax changes reflect a shift toward broadening the tax base and tightening compliance, rather than fundamentally altering personal income tax policy. The flat income tax rate remains unchanged, and there is no move toward a progressive tax system at the state level. Instead, new taxes have focused on consumption and corporate activity, such as short-term rentals, vaping products, and sports betting.
For residents and small businesses, the most important takeaways in 2025 are the increased enforcement of existing tax rules, expanded taxation of certain industries, and localized adjustments in tax rates. Staying up to date with these evolving tax obligations is crucial for effective financial planning in the state of Illinois.