Illinois vs. Tennessee Taxes: What High Earners Lose by Staying in Chicago

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If you've been thinking about moving from Illinois to Tennessee, or you've been brushing it off as too much trouble, it's worth sitting down and running the actual numbers first. The financial gap between staying in Chicago and relocating to Williamson County, Tennessee is bigger than most people expect, and it's not just about income taxes.

We broke down a real-world comparison between a family in Chicago, Illinois and that same family in College Grove, Tennessee. When you stack state income tax, property taxes, and everyday cost of living side by side, the savings add up to nearly $40,000 per year — and close to seven figures over a decade.

Here's how it breaks down.

State Income Tax: 4.95% vs. 0%

Illinois has a flat state income tax rate of 4.95%. It doesn't matter whether you earn $100,000 or $1,000,000 — everyone pays the same percentage. Tennessee has a state income tax rate of 0% on wages and salaries. That gap is permanent, and it resets every single year.

On a household income of $300,000, the Illinois income tax bill is roughly $14,850 per year. On $500,000, you're looking at about $24,750. In Tennessee, both of those numbers are zero. For high earners, this is the foundational advantage — the tax savings that compounds every year you stay and builds real separation over time.

Now, Illinois' 4.95% flat rate isn't as extreme as California's 13.3% top rate. But the key difference is that Illinois collects it from everyone — there's no lower bracket to start in. A family earning $200,000 in Illinois is handing the state nearly $10,000 before they've paid property taxes, utilities, or anything else. In Tennessee, that money stays in their pocket.

Property Taxes: Chicago's Hidden Cost

This is where the Illinois comparison gets particularly striking. Chicago and Cook County are home to some of the highest property tax rates in the United States. Effective rates in the Chicago metro area frequently run between 1.8% and 2.5% of assessed value — and in many suburban Cook County communities, they're even higher.

On a $900,000 home in the Chicago area, you could easily be paying $18,000 to $22,000 per year in property taxes. Homeowners in DuPage or Lake County aren't immune — those counties consistently rank among the highest property tax counties in the entire country.

In College Grove, Tennessee — where a comparable home often costs less while offering more land and space — the effective property tax rate is dramatically lower. Tennessee's statewide average effective rate is around 0.4% to 0.6%. On a home valued at $1 million in College Grove, annual property taxes typically come in between $5,000 and $7,000.

The difference of $12,000 to $15,000 per year in property taxes alone is significant. And unlike income taxes, property taxes hit you regardless of whether it was a good year financially.

Utility Costs and Everyday Cost of Living

Illinois winters are no secret. Heating a home in Chicago from November through March represents a real monthly expense — natural gas bills that can run $250 to $400 per month during peak winter months are common for larger homes. Electricity rates in Illinois are also above the national average.

Middle Tennessee has a milder climate and benefits from TVA — the Tennessee Valley Authority — which has historically kept electricity rates among the most competitive in the country. Natural gas usage is seasonal but significantly lower than what Chicago families are accustomed to paying. Most families relocating from Illinois to Williamson County report monthly utility savings of $150 to $300 depending on home size.

Grocery costs, dining, and general consumer prices in the Franklin and Brentwood area run meaningfully lower than Chicago as well. For families with children, the absence of Chicago-level parking costs, commuting costs, and urban living premiums adds up across every month of the year.

The Full Picture: ~$40,000 Per Year in Savings

Across a decade, that's roughly $400,000 in savings — before any investment growth on the money that's no longer going to the state or the county tax assessor. For families who move in their 40s or 50s and plan to stay in the area through retirement, the long-term accumulation can approach seven figures when modeled honestly.

Why This Becomes Generational Wealth

The savings conversation tends to stay at the annual level, but the more compelling story is what happens when those savings are intentional. Families moving from the Chicago area frequently arrive in Tennessee having sold a home in a high-cost market. They buy more home for less in Williamson County, often on a larger lot, with better schools, and still have capital left over.

Then the $40,000 a year in savings starts layering on top of that foundation. Invested conservatively, that's a meaningful retirement acceleration. Applied to a mortgage paydown, it eliminates years of interest. Deployed into a child's education fund, it compounds in ways that affect the next generation.

Tennessee also has no estate tax and no inheritance tax. Whatever you build here, you pass on whole. That's not a small thing for families thinking beyond their own financial horizon.

What Life in Williamson County Actually Looks Like

The financial case matters, but people don't stay because of the math — they stay because of the life. Williamson County delivers something that's genuinely hard to find in the Chicago metro at any price point: space, safety, excellent schools, and a pace of life that feels deliberate rather than exhausting.

College Grove is one of the most popular landing spots for families coming from the Midwest. Estate-sized lots, newer construction, access to The Grove Golf & Club, and a community feel that doesn't require trading quality of life to afford the zip code. Families from Naperville, Barrington, Lake Forest, and the North Shore consistently tell us it feels like an upgrade across every dimension — without the tax bill they left behind.

Franklin's downtown is a legitimate destination — walkable, locally owned, with live music, restaurants, and a Main Street that feels like it was designed for people rather than commuters. Brentwood offers some of the most prestigious addresses in the state, still at a fraction of North Shore pricing. And Nashville — 20 to 30 minutes north — gives you direct flights, world-class healthcare, professional sports, and a cultural scene that has grown substantially over the last decade.

Is This Move Right for You?

The Illinois-to-Tennessee comparison makes the most financial sense for households earning $250,000 or more annually — where the income tax savings are large enough to be genuinely life-changing. But the quality of life case applies across income levels, and the property tax relief in particular helps families at every price point.

We work with a lot of Midwest families — Chicago-area executives, business owners, remote workers, and retirees looking to stop giving the state a check every April. What we consistently hear after a year in Tennessee is that the only regret is not having done it sooner.

If you're in that research phase — looking at the numbers, trying to understand what neighborhoods make sense, figuring out timing — a free 30-minute Zoom call with us is the fastest way to get your specific questions answered with local context you can actually use.

Frequently Asked Questions

Does Tennessee have a state income tax?

No. Tennessee has zero state income tax on wages or salaries. The state's Hall Income Tax on investment income was fully eliminated in 2021, making Tennessee one of the most tax-friendly states in the nation for earners at every level.

How much is Illinois state income tax?

Illinois has a flat state income tax rate of 4.95%, applied equally to all income levels. Unlike California's progressive rate, Illinois taxes everyone the same — meaning middle and upper-middle income earners are hit proportionally just as hard as top earners.

How do property taxes in Chicago compare to Tennessee?

Chicago and Cook County have some of the highest effective property tax rates in the country, frequently running 1.8% to 2.5% or higher. Tennessee's effective property tax rate is typically 0.4% to 0.6%, meaning families moving from the Chicago area to Williamson County often save $10,000 to $15,000 or more annually on property taxes alone.

What is the total savings for moving from Illinois to Tennessee?

Based on a real-world comparison between a Chicago-area family and a Williamson County, Tennessee family, total annual savings — including state income tax, property taxes, utilities, and cost of living — typically add up to approximately $40,000 per year. Over a decade, that approaches seven figures.

What is College Grove, TN and why do Illinois families move there?

College Grove is a premier luxury community in Williamson County, Tennessee, featuring estate-sized lots, newer construction, and access to The Grove Golf & Club. It's consistently one of the most popular destinations for Midwest families relocating to the Nashville area, offering significantly more space and a lower cost of living than comparable Illinois communities.

What are the schools like in Williamson County, TN?

Williamson County Schools is one of the top-ranked public school districts in Tennessee, with graduation rates above 95% and nationally recognized high schools. For families accustomed to paying private school tuition in Illinois, the quality of public education in Williamson County is frequently cited as one of the primary drivers of the relocation decision.

How far is Williamson County from Nashville International Airport?

Franklin and Brentwood are typically 25 to 35 minutes from Nashville International Airport (BNA), which offers direct flights to Chicago and most major U.S. cities. Many Illinois transplants find the commute to BNA more convenient than navigating O'Hare or Midway.

What is Tennessee's estate tax?

Tennessee has no estate tax and no inheritance tax. For families building multigenerational wealth, this is a significant long-term advantage over states like Illinois, which imposes an estate tax on estates above $4 million.

Let's Talk Through Your Specific Numbers

The averages are a useful starting point, but your actual savings depend on your income, your current property tax situation, and what kind of home and lifestyle you're targeting in Tennessee. The best way to understand the real picture for your family is a conversation — not a calculator.

We work with relocating families from Illinois every month. We know which communities fit different lifestyle and budget profiles, which neighborhoods have the best long-term value, and what the buying process actually looks like from 600 miles away.

When you're ready to start the conversation, we're ready to have it.