Illinois vs North Carolina Taxes
Compare the total tax burden between Illinois (4.95% flat) and North Carolina (3.99% flat). Enter your income to see which state saves you more.
| Tax Component | Illinois | North Carolina |
|---|---|---|
| Federal Tax | $13,170 | $13,170 |
| State Tax | $4,805 | $3,481 |
| FICA | $7,650 | $7,650 |
| Total Tax | $25,625 | $24,301 |
| Take-Home | $74,375 | $75,699 |
| Effective Rate | 25.63% | 24.30% |
| Annual Difference | $1,324 more | $1,324 less |
The $1,324 difference is primarily because Illinois has a flat 5.0% income tax, while North Carolina has a flat 4.3% income tax. At your income level, Illinois's marginal rate is 5.0% vs North Carolina's 4.0%.
Why the difference
You'd save $1,324/year ($110/month) in North Carolina vs Illinois.
Tax structure
Illinois has a flat 5.0% state income tax, while North Carolina has a flat 4.3% state income tax.
Effective rate at your income
At $100,000, North Carolina's effective state rate is 3.5% vs 4.8% in Illinois — a 1.3 percentage point gap.
Tip: The flat 4.95% rate means your effective state tax rate is close to 4.95% regardless of income — no progressive bracket benefit. Property taxes in Cook County (Chicago) can exceed $6,000-$10,000 on a median-value home.
Tip: With a flat tax rate, your effective state rate is predictable and consistent. Focus tax reduction on pre-tax contributions (401k, HSA) and any state-specific deductions or credits available.
Illinois Total Tax
$25,62525.63% effective rate
North Carolina Total Tax
$24,30124.30% effective rate
Annual Savings
$1,324by living in North Carolina
Tax at Different Income Levels
| Income | Illinois Total Tax | North Carolina Total Tax | Annual Savings |
|---|---|---|---|
| $75,000 | $16,975 | $15,891 | Save $1,084 |
| $100,000 | $25,625 | $24,301 | Save $1,324 |
| $150,000 | $43,489 | $41,685 | Save $1,804 |
| $200,000 | $60,828 | $58,544 | Save $2,284 |
Based on single filer, standard deduction, 2026 tax year. Includes federal income tax, state income tax, and FICA.
Why the difference
You'd save $1,324/year ($110/month) in North Carolina vs Illinois.
Tax structure
Illinois has a flat 5.0% state income tax, while North Carolina has a flat 4.3% state income tax.
Effective rate at your income
At $100,000, North Carolina's effective state rate is 3.5% vs 4.8% in Illinois — a 1.3 percentage point gap.
Tip: The flat 4.95% rate means your effective state tax rate is close to 4.95% regardless of income — no progressive bracket benefit. Property taxes in Cook County (Chicago) can exceed $6,000-$10,000 on a median-value home.
Tip: With a flat tax rate, your effective state rate is predictable and consistent. Focus tax reduction on pre-tax contributions (401k, HSA) and any state-specific deductions or credits available.
Understanding Each State
Illinois
Illinois has a flat income tax rate of 4.95% on all taxable income. While the rate is moderate compared to states like California or New York, Illinois's high property taxes (average ~2.08%, second-highest nationally) significantly increase the total tax burden, particularly for homeowners.
Tip: The flat 4.95% rate means your effective state tax rate is close to 4.95% regardless of income — no progressive bracket benefit. Property taxes in Cook County (Chicago) can exceed $6,000-$10,000 on a median-value home.
North Carolina
This state uses a flat income tax rate, meaning the same percentage applies to all taxable income regardless of how much you earn. This simplifies tax planning but means there is no bracket benefit for lower earners. The effective rate is very close to the headline rate after deductions.
Tip: With a flat tax rate, your effective state rate is predictable and consistent. Focus tax reduction on pre-tax contributions (401k, HSA) and any state-specific deductions or credits available.
Key Comparison Points
Income tax structure: Illinois has a flat income tax (4.95% flat), while North Carolina has a flat income tax (3.99% flat).
Beyond income tax: State tax comparisons should also consider property tax rates, sales tax, and cost of living. A state with no income tax may have higher property or sales taxes that offset the savings.
SALT deduction cap: Under OBBBA, the 2026 federal SALT cap is $40,400, phasing out above $505,000 MAGI toward a $10,000 floor. This limits the federal tax benefit of living in a high-tax state, so the gross state tax difference remains close to the net difference for most earners — especially high earners inside the phaseout.
Frequently asked questions
Is it cheaper to live in Illinois or North Carolina?
Based on income tax alone, North Carolina has a lower tax burden. At $100K income, you'd save $1,324 annually in North Carolina compared to Illinois. However, total cost of living also depends on property taxes, sales taxes, and housing costs.
How much would I save moving from Illinois to North Carolina?
A single filer earning $100,000 would save approximately $1,324 per year in total taxes by living in North Carolina instead of Illinois. At $150,000 income, the savings change to $1,804 per year.
What is the income tax rate in Illinois?
Illinois has a flat income tax with rates of 4.95% flat.
What is the income tax rate in North Carolina?
North Carolina has a flat income tax with rates of 3.99% flat.