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Rent v Buy

Rent vs Buy in Illinois

Illinois carries one of the highest effective property tax rates in the country. On the state median listing price of $312,423, the property tax line alone is roughly $534 per month, or $6,405 per year, before insurance and maintenance. Cook County (the Chicago metro core) runs even higher than the state average and has a more complex assessment process than downstate counties.

State-level home appreciation has been muted by demographic headwinds. Illinois has experienced the longest-running net population loss among large states, which limits how fast home prices can rise in slower metros. The calculator below works through how those two factors combine for your specific home price and stay length.

What the numbers say

Illinois's effective property tax rate of 2.05% is roughly double the national average. The flat state income tax of 4.95% adds another layer. Combined, that is two large state-level taxes the buy decision has to clear. On the median $312,423 home, the property tax alone comes to about $534 per month before any insurance, maintenance, or HOA dues. For a comparable home in Cook County, the bill is typically several hundred dollars higher per month than downstate.

Average Illinois rent is $1,500 per month. Cook County reassessments operate on a three-year cycle, which produces step-changes in tax bills rather than gradual drift. For a buyer, the year you purchase relative to the reassessment cycle matters: buying just before a reassessment can mean a year of lower bills before the reset, while buying just after means three years at the reset level before the next move.

Illinois imposes a state-level real estate transfer tax of $1 per $1,000, with local transfer taxes layered on top in many municipalities. Chicago adds its own city transfer tax. Within the state, prices vary sharply: Chicago suburbs run high, downstate metros like Peoria or Rockford run low. The state median masks that variation, and the calculator should be re-anchored to a metro-specific home price for the comparison to be meaningful.

Why property tax is the binding constraint in Illinois

Most rent-vs-buy decisions hinge on a few large variables. In Illinois, the property tax line is a bigger variable than in most other states because the effective rate is so far above the national average. A 0.5% swing in the effective rate, which is well inside the variation between Illinois counties, can change the break-even point by a year or more.

On the median $312,423 home, moving the effective rate from 2.05% to 2.55% adds about $130 per month to the carrying cost. Over a 7-year stay, that is more than $10,000 in additional tax dollars not paid by a renter. That swing is realistic when comparing Cook County to a neighboring suburban Cook or DuPage municipality with a different tax rate.

For Illinois buyers, the practical advice is to confirm the effective property tax rate for the specific municipality and school district before running the calculator. The state-level default of 2.05% can be high or low by enough to flip the buy-vs-rent decision for a borderline stay length.

Want a calculator pre-filled with Illinois defaults? Click below; the state defaults load automatically.
Open with Illinois defaults

Home Purchase

Enter details about the home you're considering buying

Quick fill:
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Renting

Enter details about your rental alternative

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Time Horizon & Market

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Detailed mode adds 17 more inputs including advanced assumptions.

Buying is cheaper over 7 years

by $31,485

Buying comes out ahead, though the margin is meaningful only if you stay the full term and your assumptions hold roughly true.

High Confidence

The result is robust across small changes to your inputs.

Total cost of buying

$387,138

Average $4,609 per month over 7 years

Total cost of renting

$207,949

Average $2,476 per month over 7 years

Equity Built

$245,691

What you've paid down on the loan principal over 7 years.

Net Sale Proceeds

$211,339

What you'd walk away with after selling, minus closing costs.

Investment Growth

$65,204

What the down payment could grow to if invested instead of used to buy.

This chart shows total dollars spent on each path, month by month. With your inputs and time horizon, renting stays ahead the entire time.

Frequently Asked Questions

Illinois's median listing price is $312,423. That is 30% below the unweighted state-level national mean of $443,255. The gap matters more when paired with local rent levels and how long you plan to stay.

Illinois's effective property tax rate is 2.05%. On a $312,423 home (the state median), that works out to about $534 per month, or $6,405 per year. Property tax is one of the largest fixed costs of owning that a renter does not pay directly.

Buying typically does not pay off within 3 years in any U.S. market once you account for 3 to 5% closing costs on the way in and 5 to 7% selling costs on the way out. In Illinois, with a median listing price of $312,423, those two transaction costs alone come to roughly $12,497 on the buy side and $18,745 on the sell side. Appreciation would need to be unusually strong to recover that within 36 months, so renting is almost always the financially better choice for stays this short.

Most lenders use a 28 to 31% housing-cost ratio. For Illinois's median listing price of $312,423 with 20% down at a 7.0% mortgage rate over 30 years, the monthly numbers run roughly: principal and interest $1,663, property tax $534, insurance $142, total $2,338. At a 28% housing-cost ratio, that implies gross annual household income of about $100,210. No HOA dues and no PMI in this estimate (20% down clears the PMI threshold). Use our affordability calculator to model your specific scenario.

Typical break-even points run 5 to 8 years across most U.S. markets. In Illinois, with a median listing price of $312,423 and average rent of $1,500 per month, the break-even depends most on your down payment, the mortgage rate you lock, and rent growth between now and your eventual move. Use our rent-vs-buy calculator to compute it for your specific scenario.

By Barron Hansen, Founder · Last reviewed