Rental property investing in Illinois: cash flow, taxes, and what to expect

The Illinois setup, at a glance

Illinois sits at roughly 2.27% effective property tax, which matters more than most new investors realize. On a $310k-$450k Chicago property, that's about $7,037/year in taxes alone - call it $586/month before you've paid anything else. Run the rental cash flow calculator with that line item baked in or your projection will look better than reality.

Eviction stance here is tenant. Tenant-friendly especially in Chicago. 5-day pay-or-quit, hearing 14-21 days, contested cases extend significantly. 60-90 days common. That timeline directly affects your vacancy assumption: in tenant-friendly states like Illinois, you can underwrite 5-7% vacancy on B-class properties; in slower states you'd want 8-10%.

Where the math actually pencils

Chicago - $310k-$450k for typical SFR, $1,800-$2,400/mo for 2-3BR rents. appreciation has been slow, tax + ordinance pressure.

Rockford - $110k-$170k for typical SFR, $900-$1,250/mo for 2-3BR rents. deep value pocket, slower demand.

Springfield - $140k-$200k for typical SFR, $1,000-$1,350/mo for 2-3BR rents. state government anchor, stable rents.

The 1% rule (monthly rent >= 1% of purchase) is a smoke test only, but it filters fast: a $110k-$170k property in Rockford renting at the high end (1,250/mo) clears 0.8-0.9% in most cases, so you're already in the "needs the rest of the math to be tight" zone before vacancy + capex + management.

Illinois-specific things that bite

Highest effective property tax in this set. Cook County is its own special hell for landlords - long evictions, just-cause requirements. Downstate Illinois is a different country.

A few cash-flow-killer line items that catch out-of-state buyers in Illinois:

Property tax escrow. At nearly 2% effective, this is the single biggest expense after debt service in many Illinois deals.
Insurance. Standard hazard policies are still reasonable here, but ask about wind/hail riders depending on the specific zip.
PM costs. 8-10% of collected rent is typical. On a $900/mo property that's $81-90/mo - works out to about a month of vacancy each year.

What "good enough" looks like in Illinois

For a stabilized buy-and-hold in Illinois, the rule-of-thumb deal targets most investors I see are:

Cap rate: 6%+ on the actual NOI (not the broker's pro forma). Below 5% and you're paying for appreciation, which is fine if that's your thesis.
Cash-on-cash: 8-10% minimum at year 1 with 20-25% down. 12%+ is solid for the work.
DSCR: 1.25+ if you're using a DSCR loan. Lenders increasingly want 1.2 as a floor, 1.25 to clear comfortably.
Reserves: 6 months of PITI. Illinois's slower eviction process means you may need 8-9 months of reserves in a worst-case turn.

The play that works here

Illinois still has cash-flow-friendly metros (Rockford, Springfield) where the math pencils on traditional 20-25% down rentals. Buy in B-class neighborhoods, accept slightly higher turnover for the cash flow, manage tightly.

Run your specific deal through the rental calculator with the state's effective tax rate (2.27%), realistic Illinois insurance quotes, and 8-10% PM. If it still pencils after that, you've got a deal.