Louisiana Income
Tax Rates & Rules
Louisiana has a flat state income tax rate of 3%, applied to all taxable income regardless of income level.
Louisiana Flat Income Tax Rate
Louisiana tax year rates, most recently confirmed by the state Department of Revenue.
All Filing Statuses
| Taxable Income | Rate |
|---|---|
| All taxable income | 3% |
Louisiana applies a single flat rate to all taxable income, regardless of income level or filing status. Standard deduction: $12,500 (Single/MFS) / $25,000 (MFJ/HOH/QSS). Louisiana moved from a bracketed system to a single flat rate for 2025.
Sources: Louisiana DOR — 2025 IT-540 Instructions. Last verified: August 14, 2026.
How Louisiana Income Tax Works
Placeholder text — full content about how Louisiana income tax is calculated, withheld from paychecks and filed will be added here.
Frequently Asked Questions
Placeholder question about Louisiana income tax rates?
Placeholder answer text — real FAQ content will be added here.
Placeholder question about Louisiana income tax withholding?
Placeholder answer text — real FAQ content will be added here.
Placeholder question about filing Louisiana state income tax?
Placeholder answer text — real FAQ content will be added here.