Louisiana Income Tax Calculator
Louisiana rewrote its income tax code from scratch in late 2024 — one flat 3% rate for everyone, a standard deduction nearly three times bigger than before, and one of the most generous retirement exemption packages in the South. No brackets, no local income tax, no April 15 deadline. This calculator covers the full picture.
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How Louisiana Income Tax Actually Works in 2025
Louisiana’s tax code looks completely different in 2025 than it did just twelve months ago, and that is not an exaggeration. For years, Louisiana ran a three-bracket graduated income tax — 2% on the first $12,500 of net income, 4% on the next $37,500, and 4.25% above $50,000 — layered on top of a personal exemption system that had not kept pace with inflation. All of that changed in a single extraordinary legislative session held in late 2024. Act 11 eliminated every bracket and replaced the graduated structure with a single flat 3% rate, effective January 1, 2025. Simultaneously, it abolished the old personal exemption system and replaced it with a genuine, significantly larger standard deduction: $12,500 for single filers (up from $4,500) and $25,000 for married couples filing jointly (up from $9,000). For most middle-income Louisiana households, the math works out in their favor — the lower flat rate combined with the bigger deduction results in a lower total state tax bill than under the old system, even without any planning at all.
The calculation itself starts from your federal adjusted gross income — not your federal taxable income, and not your gross wages. This is an important distinction. Louisiana then subtracts its own standard deduction ($12,500 or $25,000 depending on filing status) and any qualifying subtractions to arrive at Louisiana taxable income, and then applies the flat 3%. There is no local income tax in Louisiana. No parish or municipality is permitted to levy a local income tax on wages, which means the 3% state rate is your entire state-level income tax burden — full stop. The filing deadline is May 15 rather than the federal April 15, giving Louisiana residents an extra month. Louisiana provides an automatic six-month extension to file beyond that, moving the deadline to November 15 — but taxes owed must still be paid by May 15 to avoid interest and penalties.
Why Louisiana stands out for retirees: Social Security benefits are completely exempt, with no income threshold or age limit. Federal retirement income, military retirement pay, and Railroad Retirement benefits are also fully exempt. Most Louisiana state and local government pensions — including LASERS, TRSL, MERS, and other qualifying systems — are exempt as well. For private sector retirees receiving distributions from 401(k)s, IRAs, 403(b)s, or private pensions, Act 11 doubled the additional retirement income exclusion from $6,000 to $12,000 per person for taxpayers age 65 and older. A married couple where both spouses are at least 65 can collectively exclude up to $24,000 of private retirement income on top of all the other exemptions. The standard deduction for this exclusion adjusts for inflation beginning in 2026, so it will grow over time as the cost of living rises.
Frequently Asked Questions
Louisiana applies a flat 3% rate to all taxable income for the 2025 tax year under Act 11 of the 2024 Third Extraordinary Legislative Session. The old graduated bracket system — which had rates up to 4.25% — was completely repealed effective January 1, 2025. Every Louisiana taxpayer pays the same 3% rate regardless of how much they earn or their filing status.
The Louisiana standard deduction for 2025 is $12,500 for single filers and married filing separately, and $25,000 for married filing jointly, head of household, and qualified surviving spouse filers. This is nearly three times the old standard deduction of $4,500 (single) and $9,000 (married filing jointly), and it replaces the old personal exemption system entirely.
No. Louisiana fully exempts Social Security benefits, federal retirement income (including military retirement pay), railroad retirement benefits, and most Louisiana state and local government pension income from state income tax. These exemptions apply regardless of income level or age.
Yes. Louisiana taxpayers age 65 or older may exclude up to $12,000 of qualifying retirement income — such as private pensions, 401(k) and 403(b) distributions, annuities, and IRA withdrawals — from Louisiana taxable income. For married couples filing jointly where both spouses are 65 or older, the combined maximum exclusion is $24,000.
Louisiana income tax returns for the 2025 tax year are due May 15, 2026 — one month later than the federal April 15 deadline. Louisiana provides an automatic six-month extension to file (moving the deadline to November 15, 2026), but any taxes owed must still be paid by May 15 to avoid interest and penalties.
No. Louisiana does not allow any parish or municipality to levy a local income tax on wages. The flat 3% state rate is the only state-level income tax Louisiana residents pay, with no additional local layer.
Methodology: Calculations use Louisiana’s 2025 flat 3% individual income tax rate (per Act 11, 2024 Third Extraordinary Session) applied to federal AGI minus the Louisiana standard deduction ($12,500 single/MFS, $25,000 MFJ/HOH) and any applicable retirement income exclusions (age 65+: up to $12,000 per person for private pensions, 401k/IRA/annuity income; Social Security, federal retirement, military retirement, railroad retirement, and qualifying Louisiana public pensions are fully exempt per Louisiana Department of Revenue), the 2025 IRS federal tax brackets and Child Tax Credit rules, and 2025 Social Security (6.2% to the $176,100 wage base) and Medicare (1.45% + 0.9% additional Medicare tax) rates per IRS.gov. Louisiana permits no local income tax. Louisiana returns for 2025 income are due May 15, 2026. This tool provides estimates for planning purposes only and is not tax, legal, or financial advice. Last reviewed for accuracy: June 2026.