DeKalb County, IL follows the Illinois statutory schedule. This page shows that schedule, the county's own website, and the late penalty — the county can still set its own dates, so confirm before you pay.
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…until 1st installment — June 2, 2027
Instalment
Due date
Notes
1st installment
June 2, 2027
Statutory backstop; the date printed on the county's bill controls if it is later than June 1.
2nd installment
September 2, 2027
Statutory backstop for the second installment, again subject to the printed bill date.
Schedule: www.ilga.gov · Illinois statute · not yet county-verified
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Statewide schedule — read this before you rely on it
Every county collector prints its own dates, and Cook County's spring and late-summer schedule differs from the June and September pattern in most other counties. Variation between counties here is high — treat the dates above as a starting point only.
An unpaid installment is delinquent and bears interest at 1.5% per month (0.75% in Cook County for tax year 2023 and later), and the county can sell the lien.
County collectors mail bills after the levy is extended in the spring; the printed due dates, not the statute, tell owners when each installment is payable.
DeKalb County at a glance
Population: 100,288 (Census estimate, 2023) — the 20th largest of 102 Illinois counties and county equivalents.
Typical tax bill: $5,732 a year (median for owner-occupied homes, ACS 2022 5-year estimate) — the Illinois median is $5,055.
Land area: 631.3 sq mi, about 158.9 people per sq mi.
County website:dekalbcounty.org — start here for the treasurer or tax collector page.
By post: mail to the county treasurer; the postmark usually counts, not the arrival date.
In person: the treasurer's office, with your bill or parcel number.
Escrow: if your mortgage escrows taxes, the servicer pays — you still owe any shortfall.
Is this county verified?
Not yet. DeKalb County is on the queue: we publish a county's own published dates once they have been checked against the county website. Ask for it and it moves up. Until then, the Illinois statutory schedule above is the reliable starting point.
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StacyApproved is an independent reference and is not a government agency. Deadlines change and exceptions apply — always confirm with your county treasurer using the official link on this page. Nothing here is tax, legal or financial advice.