Where Does DuPage County Get Its Money?
In my FY2026 budget breakdown, I followed where your $661.5 million goes. This is the other half: DuPage County revenue, or where the money comes from. On September 23, 2026, County Board Chair Deborah Conroy proposed a $710.7 million budget for FY2027, so the timing matters. Revenue shapes every spending decision the board makes. Here’s how DuPage County revenue is generated.
The Short Answer: DuPage Runs on Sales Tax
Most residents assume property taxes fund the county. They don’t. In the FY2027 proposal, sales tax brings in $166.6 million, or 58.7% of the county’s $283.8 million General Fund. The General Fund is the county’s main operating account.
That General Fund is growing from $263.1 million (FY2026) to $283.8 million (FY2027), up 7.9%. The county’s own budget document says the increase comes largely from sales tax.
DuPage County Revenue by Source (FY2027 Proposed General Fund)
| Source | FY2027 proposed | What it is |
|---|---|---|
| Sales tax | $166.6M | Four county pieces of the sales tax, collected by the state and sent back to the county |
| Intergovernmental | Up $2.3M from FY2026 | State income tax share, a state replacement tax on business property, and state reimbursement of certain salaries |
| Property tax | Share of $71.9M levy | Only about 38% of the levy goes to the General Fund. The rest goes to the Health Department, stormwater, and pensions |
| Charges for services | $17.4M | Court fees, recording fees, Circuit Court Clerk fees |
| Other financing sources | $12.5M | Recurring transfers between funds and sales of county assets |
| Miscellaneous | $8.0M | Reimbursements, refunds, insurance settlements |
| Fines and forfeitures | $7.0M | Court fines and penalties on late property taxes |
| Other taxes | $4.5M+ | Real estate transfer stamps, cannabis, video gaming, off-track betting |
| Investment income | $3.0M | Interest on county cash |
| Licenses and permits | $1.1M | Liquor, cable franchise, charitable games |
Sales Tax: DuPage’s Growth Engine and Its Biggest Risk
DuPage’s basic sales tax rate is built from state, county, and transit pieces. Some cities add their own sales taxes on top. The county collects four pieces:
- County Supplemental Tax (0.25%): charged on purchases everywhere in the county, in cities and unincorporated areas alike.
- County Tax (1%): charged in unincorporated areas only.
- Transit (RTA) share (0.25%): one-third of the transit sales tax is returned to the county.
- Use Tax: tax on some online and out-of-state purchases.
Sales tax jumped from $138.0 million in FY2024 to $157.3 million in FY2025, a 14.4% increase. The county’s audited financial report credits three things: stronger consumer spending, a 2025 state law that taxes online sales based on where the buyer lives, and higher transit ridership. For FY2027, the county expects its two largest sales tax pieces to grow another 11% ($15.5 million).
Here’s the catch. The county’s own budget says it “is reliant on Sales Tax, which is sensitive to the business cycle.” When a recession cuts consumer spending, DuPage’s main revenue source shrinks right when demand for county services rises.
Myth vs. Fact: The August 2026 Sales Tax Increase
On August 1, 2026, the transit sales tax in DuPage rose by 0.25 percentage points, from 0.75% to 1%. It was part of the state’s transit funding law, which created the Northern Illinois Transit Authority (NITA) to replace the RTA. The increase is expected to raise about $478 million a year across the region.
The county gets none of it. The county’s FY2027 budget says the increase has “no direct impact” on the General Fund. The money goes to regional transit agencies. If your receipt looks higher, that’s the state legislature’s decision, not the County Board’s.
Property Tax: The County Gets About 2 Cents of Every Dollar
All local governments in DuPage together billed about $3.7 billion in property taxes for 2025. Schools took about 74%. The county’s operating share is $71.9 million, about 2%.
For FY2027, the county plans to keep its levy flat except for new construction. A $350,000 home would pay about $131 to DuPage County government, up from $129.
Of that levy, about 38% funds the General Fund. About 27% goes to the Health Department, 13% to stormwater, and 7% to the county’s share of employee pensions (IMRF).
Illinois’ tax cap law (PTELL) limits how much existing property taxes can grow each year: inflation (CPI) or 5%, whichever is lower. Total taxable property value in DuPage is estimated to grow 4.1% to $59.2 billion. That growth gives the county room to raise its levy without raising the rate. So far it has chosen not to.
What this means for you: If your property tax bill went up, the cause is almost certainly your school district, city, or park district, not the county. I won’t promise county property tax relief I can’t deliver. I’d rather be honest about where the county can make a difference.
The Pattern Worth Watching: Revenue Keeps Beating the Forecast
For FY2025, the county budgeted $241.1 million in General Fund revenue. It actually collected $262.3 million, $21.2 million (8.8%) more. The audit notes revenue has beaten the forecast four years in a row and calls this the county’s “conservative approach.”
The county’s unassigned reserve reached $108.8 million, 48.7% of annual spending. Its own policy requires only 25%.
Careful forecasting helps protect DuPage’s AAA bond rating, which only about 1.6% of U.S. counties hold. That matters, because a strong rating lowers borrowing costs for taxpayers. But when revenue beats the forecast year after year, surplus dollars fund decisions made after the public budget process. The FY2026 budget’s $18.1 million initiative was partly funded by “any potential FY2025 surplus.”
Residents should be able to see those decisions coming.
What I’ll Push For
- Publish revenue results every quarter. Show residents budget vs. actual on a simple public dashboard.
- Set a clear rule for surpluses. Decide ahead of time what happens to money above the reserve target: one-time projects, paying down debt, or returning it to taxpayers. Don’t leave it to mid-year announcements.
- Plan for a sales tax downturn. Stress-test the budget against a recession before one arrives.
- Measure spending by results. New workforce programs, like the WorkNet childcare pilot, should report measurable career outcomes. That’s the core of my Career Pathways platform.
Frequently Asked Questions
What is DuPage County’s biggest source of revenue?
Sales tax. It’s $166.6 million, or 58.7% of the proposed FY2027 General Fund.
How much of my property tax goes to DuPage County?
About 2%. On a $350,000 home, that’s roughly $131 a year under the FY2027 proposal. Schools get about 74% of property taxes in DuPage.
Did DuPage County raise the sales tax in August 2026?
No. The 0.25-point increase on August 1, 2026 was set by state law and goes to the Northern Illinois Transit Authority, not the county.
How big is the DuPage County budget for 2027?
The proposed FY2027 budget is $710.7 million, including a $283.8 million General Fund. The County Board votes November 24, 2026. The fiscal year starts December 1.
Does DuPage County have a budget surplus?
General Fund revenue beat the forecast by $21.2 million in FY2025. The county’s unassigned reserve is $108.8 million, nearly double its 25% policy minimum.
Want plain-English budget breakdowns in your inbox? Join the campaign. Read my FY2026 spending breakdown.
Sources: DuPage County FY2027 Budget – Revenue; DuPage County FY2025 Annual Comprehensive Financial Report; Daily Herald, Sept. 23, 2026; DuPage County Sales Taxes; Illinois Department of Revenue Bulletin FY 2026-34; Metropolitan Planning Council; Daily Herald, Oct. 20, 2024.
