How to Use This Calculator
Enter your income, filing status, and any deductions. The calculator computes your Louisiana state income tax alongside your federal tax, showing exactly how much goes to each and what you take home.
The most useful thing to try? See how Louisiana's flat 3.0% rate affects different income levels, then test how deductions and retirement contributions change your bottom line.
Here's what each field means:
Annual Income is your total earnings before any taxes. Include wages, freelance income, investment income, and any other sources.
Filing Status determines which deductions and exemptions apply. Louisiana uses filing statuses similar to the federal system.
Louisiana Income Tax: What You Need to Know
Louisiana uses a flat income tax of 3.0% on all taxable income. Unlike states with progressive brackets, everyone pays the same percentage regardless of how much they earn. A teacher making $45,000 and a CEO making $500,000 both pay 3.0%.
Louisiana underwent a dramatic tax overhaul effective January 2025. The state replaced its three-bracket progressive system (1.85% to 4.25%) with a flat 3.0% rate. At the same time, Louisiana eliminated the ability to deduct federal income taxes from state taxable income — a deduction that had been a unique feature of the state's tax code. The new $12,500 standard deduction for single filers is much higher than the previous system. Louisiana does not tax Social Security benefits.
A Real Example
Let's say you're a single filer earning $60,000 in Louisiana. After applying the standard deduction of $12,500, your approximate Louisiana state income tax would be around $1,425, for an effective state tax rate of about 2.4%.
That's just the state portion. Federal income tax and FICA taxes are additional.
Deductions and Exemptions
Standard Deduction: $12,500 for single filers and $25,000 for married couples filing jointly.
New standard deduction of $12,500 (single) / $25,000 (MFJ). Personal exemption credits. Louisiana does not tax Social Security and offers exclusions for some retirement income.
Local Taxes
No local income taxes in Louisiana (though the state has high local sales taxes).
Recent Changes
Major overhaul in 2025: flat 3.0% rate, new higher standard deduction, elimination of federal tax deductibility. This was the most significant Louisiana tax change in decades.
How to Use This Calculator Strategically
Model a raise or job change. With a flat tax, the math is simpler — every additional dollar is taxed at 3.0%. But deductions and credits can still shift your effective rate.
Compare filing statuses. Even with a flat rate, different filing statuses unlock different deduction amounts that can affect your bottom line.
Plan retirement contributions. See how 401(k) or IRA contributions reduce your Louisiana taxable income and lower your state tax bill.
Evaluate a move. Compare Louisiana's flat 3.0% rate to other states. Depending on your income level, a flat tax state might save you money — or cost you more — compared to a progressive system.
References
- Louisiana Department of Revenue. (2025). Individual Income Tax.
This calculator is for educational purposes only and does not constitute tax or financial advice. Tax rates and rules change regularly. Consult a qualified tax professional for guidance specific to your situation.