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State Income Tax vs. Federal Income Tax: What You Need to Know
June 18, 2026
June 18, 2026
Tax season can feel overwhelming — especially when you're juggling two separate sets of rules. If you've ever wondered why you owe money to both your state and the federal government, you're not alone. Understanding the difference between state and federal income tax is one of the most practical things you can do for your finances.
In this guide, we break down how each tax works, what you'll owe, and which states charge the most (or nothing at all). If you're already dealing with a tax bill you can't pay, you can compare the best tax relief services to find help.
Your state and federal tax obligations combine to determine how much of your paycheck you actually keep. Understanding both layers helps you plan your budget, avoid surprises at filing time, and make smarter decisions about where you live and work.
Here's a concrete example: based on 2024 IRS brackets, a single filer earning $75,000 pays roughly $12,200 in federal income tax (IRS). But the state portion could range from $0 in Texas to approximately $4,500 in California (Tax Foundation). That's a difference of thousands of dollars a year — just based on your address.
If you're a first-time filer, forgetting to file a state return can trigger penalties you didn't see coming. And if you're considering a move to a new state, the income tax difference could outweigh other cost-of-living factors. Getting clear on how these two systems work together puts you in control.
State income tax is a tax on your earnings collected by the state where you live or work. Tax rates vary from state to state — some use a flat rate, others use progressive brackets, and nine states don't charge any state income tax at all.
State income taxes fund public services like education, healthcare, law enforcement, and transportation. Rates range from as low as 2.9% in North Dakota to as high as 14.4% for California residents earning over $1 million (Tax Foundation).
State taxes are a legal obligation if you earn income. Not filing or paying can result in penalties and fines. State income taxes are generally due April 15 — the same deadline as federal taxes. If April 15 falls on a weekend, the deadline moves to the next business day.
In addition to state income tax, you also have to file and pay federal taxes. Anyone with a qualifying salary must pay federal income taxes, which the U.S. government uses to fund defense, healthcare, education, infrastructure, and social programs.
Here's a chart showing the requirements for filing and paying federal income taxes.
Filing Status | Age at End of Year | Minimum Gross Income |
Single | Under 65 | $13,850 |
Single | 65 or older | $15,700 |
Head of household | Under 65 | $20,800 |
Head of household | 65 or older | $22,650 |
Married filing jointly | Under 65 (both spouses) | $27,700 |
Married filing jointly | 65 or older (one spouse) | $29,200 |
Married filing jointly | 65 or older (both spouses) | $30,700 |
Married filing separately | Any age | $5 |
Qualifying surviving spouse | Under 65 | $27,700 |
Qualifying surviving spouse | 65 or older | $29,200 |
If you make less than the minimum income thresholds for filing, a federal tax return isn't required. Check your state's tax requirements separately — they may differ.
The federal income tax rate depends on how much you earn. There are seven tax brackets for different income levels, each with its own rate.
2024 Tax Rate | Single | Married Filing Jointly | Married Filing Separately | Head of Household |
10% | $0–$11,600 | $0–$23,200 | $0–$11,600 | $0–$16,550 |
12% | $11,601–$47,150 | $23,201–$94,300 | $11,601–$47,150 | $16,551–$63,100 |
22% | $47,151–$100,525 | $94,301–$201,050 | $47,151–$100,525 | $63,101–$100,500 |
24% | $100,526–$191,950 | $201,051–$383,900 | $100,526–$191,950 | $100,501–$191,150 |
32% | $191,951–$243,725 | $383,901–$487,450 | $191,951–$243,700 | $191,151–$243,700 |
35% | $243,726–$609,350 | $487,451–$731,200 | $243,726–$365,600 | $243,701–$609,350 |
37% | $609,351 or more | $731,201 or more | $365,601 or more | $609,351 or more |
We reviewed IRS publications, Tax Foundation data, and state revenue department resources to compile current rates, brackets, and filing requirements. Our editorial team cross-checked figures against the most recent available IRS and state revenue data and flagged items requiring current-year verification for human review before publication.
The table below summarizes how federal and state income taxes differ in terms of rates, administration, filing requirements, and how funds are used.
Category | State Income Tax | Federal Income Tax |
Governing authority | Individual state tax departments | Internal Revenue Service (IRS) |
Who must file | Varies by state, based on income and residency | Most U.S. citizens and residents above income thresholds |
Filing deadline | Typically April 15 (varies slightly by state) | April 15 (or next business day) |
Tax rates | Flat, progressive, or none (depends on state) | Progressive — 7 brackets (10% to 37%) |
Standard deductions | Varies — some states offer none | $14,600 for single filers (2024; IRS) |
Use of funds | Local services (education, transportation, etc.) | Federal programs (defense, Medicare, infrastructure) |
Filing forms | State-specific tax forms | IRS Form 1040 and schedules |
States with no income tax | 9 states (e.g., TX, FL, WA) | Not applicable — all states follow the same federal rules |
The entity that collects your taxes differs between the two systems. At the federal level, it's the Internal Revenue Service (IRS). At the state level, it's the individual state government office responsible for collecting state taxes.
Tax rates also differ. Federal income tax uses seven progressive brackets, while states may use progressive brackets, a flat rate, or no income tax at all.
Filing requirements differ too. Nearly everyone who earns income in the U.S. must file a federal return if they exceed certain income thresholds based on filing status. For states, the requirements vary — sometimes you must earn above a certain amount to be required to file.
Feature | Flat Tax | Progressive Tax |
Rate structure | Single fixed rate for all income levels | Higher income = higher rate |
Calculation | Simpler to compute | More complex, with multiple brackets |
Perceived fairness | Same percentage for all earners | Those who earn more pay more |
Common criticism | May favor high earners | May discourage financial growth |
States fall into one of three categories when it comes to state income tax: flat tax, progressive tax, or no tax.
Flat tax states charge the same percentage for everyone, regardless of how much they earn. As of Jan. 1, 2025, the states with a flat income tax include Arizona, Colorado, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Michigan, Mississippi, North Carolina, Pennsylvania, Utah, and Washington. Source: Tax Foundation
Progressive tax states use brackets — the more you earn, the higher your rate on income above each threshold. Here's an example using Delaware:
Income Range | Tax Rate |
$0 – $10,000 | 3% |
$10,001 – $50,000 | 5.5% |
$50,001 – $100,000 | 5.75% |
$100,001 – $200,000 | 6.5% |
$200,001 – $500,000 | 6.9% |
Over $500,000 | 7.5% |
Source: Delaware Division of Revenue. Figures shown are for the 2024 tax year.
Flat tax pros: Simple and easy to calculate. Applies the same rate to all income levels. Supporters say it encourages economic growth.
Flat tax cons: May favor high earners. Critics call it regressive. Can generate less revenue for public programs.
Progressive tax pros: Higher earners pay more. Can reduce income inequality. Generates more state revenue.
Progressive tax cons: More complex to calculate and file. May discourage financial growth. Some see it as penalizing success.
Nine states with no income tax don't require residents to file or pay state income taxes:
Alaska
Florida
Nevada
New Hampshire*
South Dakota
Tennessee
Texas
Washington**
Wyoming
* New Hampshire previously taxed interest and dividends income at 3%, but that tax was fully phased out as of Jan. 1, 2025. New Hampshire residents no longer owe state income tax on any income type.
** Washington residents pay a 7% tax on capital gains income.
Depending on which state you live in, you might pay significantly more in taxes. Using the example of a single filer earning $100,000:
California has the highest top marginal income tax rate at 14.4% on incomes over $1 million. For someone earning $100,000, the applicable California rate is 9.3%. Hawaii is second highest with a top rate of 11%, and New Jersey comes third at 10.75% (Tax Foundation).
* Tax rates as of Jan. 1, 2025. Arizona, Colorado, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Michigan, Mississippi, North Carolina, Pennsylvania, Utah, and Washington have a flat income tax. Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, and Wyoming have no income tax. The remaining states use a graduated-rate income tax system.
Source: Tax Foundatio
Each tax situation is different — your deductions and credits will affect your final liability. But here's a simplified example using two states and federal income tax to show how the math works.
We'll use a single filer earning $60,000 annually. The figures below use 2024 tax year deductions and brackets — check IRS.gov and your state's revenue department for the most current numbers.
The standard deduction for a single filer in 2024 is $14,600 (IRS). Subtract that from $60,000 to get $45,400 in taxable income.
This taxable income falls in the 12% bracket for 2024. Keep in mind that the entire income isn't taxed at 12%. The first $11,600 is taxed at 10%, which amounts to $1,160. The remaining $33,800 is taxed at 12%, which comes to $4,056. Add those together for a total federal tax bill of $5,216.
Now assume this person lives in California, where the standard deduction is $5,363 (California Franchise Tax Board). That makes the taxable income $54,637 ($60,000 – $5,363).
This falls into the 8% bracket for 2024. Again, the entire $54,637 isn't taxed at 8%. Here are the California state income tax brackets to consider:
1% | $0 to $10,412 (pay $104.12) |
2% | $10,413 to $24,684 (pay $285.42) |
4% | $24,685 to $38,959 (pay $570.96) |
6% | $38,960 to $54,081 (pay $907.26) |
The total for these brackets is $1,867.76. The remaining $556 in the 8% bracket adds $44.48, for a grand total of $1,912.24 in California state income taxes. (Source: California Franchise Tax Board. Figures shown are for the 2024 tax year. )
For perspective on different state taxes, let's run the same example with Arkansas. The standard deduction there is $2,200 (Arkansas DFA), making the taxable income $57,800. This falls into the 4.4% bracket.
$0 – $5,099 | 0.0% |
$5,100 – $10,299 | 2.0% (pay $104) |
$10,300 – $14,699 | 3.0% (pay $131.97) |
$14,700 – $24,299 | 3.4% (pay $326.36) |
The remaining $33,500 is taxed at 4.4%, totaling $1,474. Add the amounts above for a total state tax bill in Arkansas of $2,036.33.
Interestingly, despite the lower tax rate, Arkansas residents pay a little more in state taxes in this example. That's because of how the brackets are structured — wider or narrower brackets change the final number even when the top rate is lower. (Source: Arkansas Department of Finance and Administration. Figures shown are for the 2024 tax year. )
If you're filing for the first time: Focus on understanding both your state and federal obligations. Tax preparation software can walk you through both returns, and many options offer free filing for simple returns. The key is to file both on time — missing a state return is one of the most common mistakes new filers make.
If you're considering a move: State income tax should be a factor in your cost-of-living comparison. Moving from a state like California (top rate of 14.4%) to a no-income-tax state like Texas could save you thousands annually. There are also strategies to lower your tax bill regardless of where you live. But don't forget to account for other taxes your new state may charge, like higher property or sales taxes.
If you owe back taxes or have unfiled returns: Letting tax debt sit only makes it worse — penalties and interest accumulate on both the state and federal level. Professional tax relief help is available, and reaching out sooner gives you more options.
Review your federal tax bracket. Knowing where you fall in the seven federal brackets helps you plan withholding and avoid surprises at filing time.
File both returns on time. Missing a deadline — state or federal — can mean penalties and interest. Set a calendar reminder for April 15.
If you're dealing with tax debt, get help. Compare tax relief services to find a provider that fits your situation.
Yes. State and federal income taxes require separate forms, and payments go to separate agencies. If you use tax software, the program typically handles both returns using the same financial information, though you may pay a separate fee to file each one.
No. Federal income tax rates, brackets, and deadlines are the same regardless of which state you live in. Your state income tax is what varies based on where you live.
Yes, through the state and local tax (SALT) deduction. If you itemize deductions on your federal return, you can deduct state income taxes paid — but the deduction is currently capped at $10,000 for most filers (IRS). This is an itemized deduction, not a credit, so it only applies if your total itemized deductions exceed the standard deduction. Note that the SALT cap may change — check the current year's rules before filing.
If you're a U.S. citizen living abroad, you'll still owe federal income taxes, though you may qualify for certain exclusions. For state taxes, once you've cut ties with your former state of residence, you generally won't owe state income tax there. Speak with an accountant familiar with overseas tax obligations to understand your specific responsibilities.
The federal deadline is April 15 (or the next business day if it falls on a weekend or holiday). Most states follow the same date, but some set different deadlines. Always check your state's specific filing deadline to avoid late penalties.
Written by Su Guillory — Su is a freelance financial writer who covers personal finance, small business finance, and taxes. Her work helps readers navigate complex financial decisions with clear, practical guidance.
IRS — Federal Income Tax Rates and Brackets — Official bracket data and filing requirements
IRS.gov — Standard deduction figures and general filing guidance
Tax Foundation — State income tax rates and structure data
State revenue department websites — Individual state bracket and filing threshold data for California, Arkansas, and Delaware
Su Guillory is a business and finance writer at BestMoney.com, specializing in tax relief, debt consolidation, personal loans, and student loans. She has authored several business books and been published on sites including Forbes, Nav, SoFi, and AllBusiness. Su’s extensive expertise in credit and financial strategies helps readers make sound decisions.
