United States
Louisiana: what the state takes
Louisiana charges its own income tax on top of federal tax. Here is the rate, the return, the date and where the official rules live.
Agency page last read 11 September 2026.
State rate
3%
Flat 3.00% from 2025, after the 12,500 single or 25,000 joint deduction
Resident return
Form IT-540
Louisiana Department of Revenue
Due
15 May
Weekends and holidays can push it on
Try a figure
Yearly income
How you file
Louisiana tax
$1,875
Top state rate you touch
3%
- Kept before federal tax$59,273
- Federal income tax$13,852
- Louisiana tax$1,875
Flat rate of 3% on $62,500 after a $12,500 deduction.
Filing in Louisiana
- Who collects it
- Louisiana Department of Revenue
- Return
- Form IT-540
- Deadline
- Usually 15 May
Federal comes on top
Whatever your state does, the IRS wants Form 1040 by 15 April, plus Social Security and Medicare through your wages or self employment tax. State tax paid can sometimes be deducted federally if you itemise, within a yearly cap.