Quick Answer
Currently 8 states have flat income tax rates in 2026: Colorado (4.40%), Illinois (4.95%), Indiana (3.23%), Kentucky (4.50%), Michigan (4.25%), North Carolina (4.75%), Pennsylvania (3.07%), and Utah (4.85%). This means everyone pays the same percentage regardless of income level.
Best Answer
Sarah Chen, CPA
Workers comparing state tax burdens for job opportunities or relocation decisions
The 8 flat income tax states in 2026
Flat tax states charge the same percentage on all income levels, from your first dollar to your highest dollar earned. Here are the current flat tax states and their rates:
*Note: These are gross tax amounts before deductions and exemptions*
How flat tax works vs progressive tax
Flat tax example (Illinois at 4.95%):
Progressive tax example (California):
Real paycheck impact: $75,000 salary comparison
For someone earning $75,000 annually, here's what state income tax looks like in flat tax states:
Biweekly paycheck deductions (26 pay periods):
Advantages of flat tax states
Predictable calculations: Easy to estimate your exact tax burden — just multiply your income by the rate.
No bracket creep: Raises and bonuses don't push you into higher tax brackets since there's only one rate.
Simpler tax planning: Investment timing, retirement withdrawals, and other financial decisions aren't complicated by varying tax rates.
Disadvantages compared to progressive states
Higher burden on lower incomes: A 4.95% tax on $30,000 income takes a bigger bite proportionally than progressive states that might tax the first $30,000 at 1-2%.
Lower burden on high incomes: Someone earning $500,000 pays the same 4.95% rate in Illinois that someone earning $50,000 pays, while progressive states might charge 8-13% on high earners.
What you should do
When comparing job offers or considering relocation, look beyond just the state income tax rate. Consider:
Use our paycheck calculator to model your exact take-home pay in different flat tax states by entering your salary and selecting each state.
Key takeaway: 8 states use flat income tax rates ranging from 3.07% (Pennsylvania) to 4.95% (Illinois), making tax calculations simple but potentially more expensive for lower incomes compared to progressive tax states.
*Sources: State Department of Revenue websites, [IRS Publication 17](https://www.irs.gov/pub/irs-pdf/p17.pdf)*
Key Takeaway: 8 states have flat income tax rates from 3.07% to 4.95%, making calculations simple but creating higher relative burden on lower incomes.
2026 flat income tax rates by state
| State | Flat Tax Rate | Tax on $50,000 | Tax on $100,000 | Tax on $200,000 |
|---|---|---|---|---|
| Pennsylvania | 3.07% | $1,535 | $3,070 | $6,140 |
| Indiana | 3.23% | $1,615 | $3,230 | $6,460 |
| Michigan | 4.25% | $2,125 | $4,250 | $8,500 |
| Colorado | 4.40% | $2,200 | $4,400 | $8,800 |
| Kentucky | 4.50% | $2,250 | $4,500 | $9,000 |
| North Carolina | 4.75% | $2,375 | $4,750 | $9,500 |
| Utah | 4.85% | $2,425 | $4,850 | $9,700 |
| Illinois | 4.95% | $2,475 | $4,950 | $9,900 |
More Perspectives
Sarah Chen, CPA
Remote employees who can choose where to establish residency for tax optimization
Flat tax states for remote work optimization
As a remote worker, flat tax states offer predictable tax planning since your rate never changes regardless of income fluctuations from bonuses, stock options, or freelance work.
Best flat tax states for remote workers
Pennsylvania (3.07%): Lowest flat rate, but some cities add local income taxes.
Indiana (3.23%): Second-lowest rate, low cost of living, good internet infrastructure in cities like Indianapolis.
North Carolina (4.75%): Higher rate but no local income taxes in most areas, growing tech hubs in Raleigh-Durham and Charlotte.
Income volatility advantage
Remote workers often have variable income from:
In progressive tax states, a large bonus could push you into a higher bracket (California's top rate is 13.3%). In flat tax states, that same bonus is taxed at the same rate as your regular salary.
Example: $80,000 salary + $20,000 bonus
Interestingly, California's progressive structure can sometimes result in lower total taxes for this income level, but the calculations are more complex.
Multi-state consideration
If you travel frequently or split time between states, flat tax states simplify part-year resident calculations since you don't need to figure out which income falls into which bracket.
Key takeaway: Flat tax states offer predictable rates for remote workers with variable income, though the actual tax savings depend on your total income level and the specific states being compared.
Key Takeaway: Remote workers benefit from flat tax states' predictable rates on variable income like bonuses and freelance work, simplifying tax planning.
Sarah Chen, CPA
New residents trying to understand their tax situation after relocating to a flat tax state
Moving from progressive to flat tax state
If you moved from a progressive tax state to a flat tax state, your tax situation becomes much simpler but might not always be cheaper.
Common scenarios and impacts
Scenario 1: Lower income ($40,000)
Moving from California to Illinois might actually increase your state tax burden:
Scenario 2: Higher income ($150,000)
Moving from California to Illinois saves money:
Scenario 3: Very high income ($300,000)
Flat tax states become much more attractive:
First-year filing complexity
As a part-year resident, you'll need to:
1. File in your old state for income earned while living there
2. File in your new flat tax state for income earned after moving
3. Calculate the flat tax only on income earned as a resident
The advantage: Once you're a full-year resident, your tax calculations become extremely straightforward.
Planning for next year
With flat tax rates, you can easily calculate your exact tax liability for any financial decision:
Key takeaway: Moving to a flat tax state simplifies future tax planning significantly, but may increase taxes for lower incomes compared to progressive states that tax initial income at lower rates.
Key Takeaway: New residents of flat tax states get simpler tax calculations going forward, but should compare total tax burden as flat rates can be higher for lower incomes.
Sources
- Tax Foundation State Tax Data — Comprehensive state tax rate comparisons
- IRS Publication 17 — Your Federal Income Tax (For Individuals)
Related Questions
Reviewed by Sarah Chen, CPA on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.