Key Tax Facts: Louisiana
- Louisiana filing deadline is May 15 for most filers
- Federal income taxes paid are deductible from Louisiana income
- Highest combined sales tax rate in the U.S. on average
- Significant exemptions for retirement income from government pensions
Louisiana State Income Tax Overview
Louisiana taxes income at a flat 3%. A comprehensive reform enacted in December 2024 took effect January 1, 2025, replacing three graduated brackets that topped out at 4.25% with a single rate. The same law swapped the old combined standard deduction and personal exemption for a standard deduction of $12,500 for single filers and $25,000 for married couples filing jointly, indexed for inflation beginning in 2026. Louisiana exempts most retirement income from state tax, including Social Security, teacher retirement, and military retirement pay. Note that Louisiana carries the highest average combined state and local sales tax rate in the country, which offsets some of the benefit of the low income tax rate.
Louisiana Income Tax Rate (2025)
Louisiana uses a flat income tax rate -- the same percentage applies to all taxable income regardless of how much you earn.
Source: Louisiana Department of Revenue
What a Louisiana Resident Actually Pays: A Worked Example
| Taxable Income | $65,000.00 |
| Louisiana Flat Rate | 3% |
| Estimated State Tax | $1950.00 |
| Effective Rate | 3% |
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Frequently Asked Questions -- Louisiana Income Tax
Does Louisiana have a state income tax?
Yes. Louisiana imposes a state income tax with a flat rate of 3%. This is separate from your federal income tax obligation.
What is the Louisiana income tax rate for 2025?
Louisiana uses a flat income tax rate of 3% on all taxable income, regardless of income level or filing status.
Do I have to file a Louisiana state tax return?
Most full-year Louisiana residents with income above the state filing threshold must file a state return. Check the Louisiana Department of Revenue for current thresholds and requirements.
How accurate is this estimate?
This is a planning estimate of your federal income tax only. It does not calculate Louisiana state tax, and it does not account for state deductions, credits, exemptions, or local taxes. Use the Louisiana rate schedule above as a reference, and verify with official Louisiana tax forms or a qualified tax professional.
Does this calculator include federal income tax?
Yes. The calculator estimates your 2025 federal income tax using the official IRS 2025 brackets. It does not compute your Louisiana state tax -- see the Louisiana rate schedule below to work that out.
Where can I find official Louisiana tax forms?
Official forms, instructions, and filing guidance are available at the Louisiana Department of Revenue.
What is the sales tax rate in Louisiana?
Louisiana's combined state and average local sales tax rate is 9.56%. This is separate from income tax and applies to most retail purchases -- use our sales tax calculator to check a specific purchase.
When are Louisiana 2025 state taxes due?
2025 taxes are generally filed in 2026. The Louisiana filing deadline is May 15, 2026 -- note this differs from the federal deadline of April 15, 2026, so mark both dates.
Understanding Your Louisiana Tax Estimate
Your results combine two separate bills: federal tax owed to the IRS, and Louisiana state tax owed to the Louisiana Department of Revenue. The state return is filed separately from your federal Form 1040, with a state filing deadline of May 15. For the mechanics of how bracket math actually works -- why your effective rate is almost always lower than your top bracket -- see our marginal vs. effective tax rate guide.
Lowering Your Louisiana Bill
Pre-tax retirement contributions reduce your federal and Louisiana taxable income in the same move -- see our 401(k) contribution limits and HSA limits guides for the current caps. Beyond that, Louisiana-specific credits and deductions that don't exist at the federal level are listed at the Louisiana Department of Revenue -- worth checking, since these are easy to miss if you only look at federal guidance.
Combined Sales + Income Tax Picture
Louisiana's combined state-plus-average-local sales tax rate is 9.56%. If you're self-employed, that's an added layer on top of income tax -- our self-employment tax calculator covers the SE-specific piece separately.
Disclaimer: Estimates for educational purposes only. State tax results are approximations based on published bracket data and do not account for all deductions, credits, exemptions, local taxes, or individual situations. Not tax, legal, or financial advice. Consult the Louisiana Department of Revenue or a qualified tax professional for guidance specific to your situation.