Louisiana Payroll Taxes and Withholding Guide (2026)

What Makes Louisiana Payroll Different

Federal payroll tax is the same in every state. What changes from one state to the next is the second layer: state income tax withholding, employer unemployment taxes, and any local wage taxes. Louisiana's distinctive feature for 2026 is how recently and how completely it simplified. Act 11 of the 2024 Third Extraordinary Session collapsed the old three-bracket income tax into a single flat 3% rate effective January 1, 2025, and the Department of Revenue rebuilt the withholding formula around one flat 3.09% rate and a larger standard deduction.

Two things fell away in that reform: the graduated brackets and the per-paycheck allowances for personal exemptions and dependents. The result is one of the simpler state withholding systems in the country. There is also no local or parish wage tax anywhere in Louisiana, so a Louisiana stub carries only federal taxes and the single flat state line. The federal baseline behind all of this is explained in the how payroll taxes work guide.

Employee Withholding Overview in Louisiana

A Louisiana employee sees federal taxes and a single flat state tax. There is no local or parish line, no employee unemployment line, and no state disability line.

The federal lines work identically to any other state. For Social Security, the 2026 wage base is $184,500, after which Social Security stops for the year. Medicare has no cap. What is unique to Louisiana is that the state line is a single flat rate applied after a real standard deduction, with no local tax and no employee unemployment contribution to withhold.

How Is Louisiana State Income Tax Withheld?

Louisiana uses the computer formula method in the Louisiana Department of Revenue's R-1306 Withholding Tables and Formulas. The employer annualizes wages, subtracts the standard deduction set by the employee's Form L-4 code, and multiplies the remainder by the 3.09% withholding rate. The official per-period formula is:

Here S is the salary for the pay period and N is the number of pay periods per year; any negative result is treated as zero. For 2025 the deduction figures were $12,500 and $25,000. The federal Form W-4 sets federal withholding, covered in the W-4 withholding explained guide, while Form L-4 sets the Louisiana standard-deduction code and any additional Louisiana amount. Because a real deduction sits inside the formula, the effective Louisiana rate is below 3.09% and lands near the flat 3% rate charged on the annual return.

Louisiana Withholding (Form L-4)

Form L-4 (R-1300) is Louisiana's employee withholding certificate, and the federal W-4 is not an acceptable substitute. Block A sets the standard-deduction code that drives the entire withholding calculation.

L-4 Block A Codes

Any taxpayer may claim code 0 or 1; only married-joint, qualifying-surviving-spouse, or head-of-household filers should claim code 2. If no L-4 is filed, the employer withholds at code 0 with no deduction, so more of the pay is taxed. To see how the code changes take-home pay, use the Louisiana paycheck calculator.

The 2025 Flat-Tax Reform

This is the feature that defines current Louisiana payroll. Act 11 of the 2024 Third Extraordinary Session, effective January 1, 2025, replaced Louisiana's graduated income tax with a single flat 3% rate and raised the standard deduction. The Department of Revenue reissued the withholding tables and Form L-4 to match.

The practical effect for a paycheck is that dependents no longer change the amount withheld. Before the reform, adding a child reduced the tax taken from each check; now dependents reduce tax only on the annual return, through credits, while withholding depends solely on the Block A code. Workers who updated their family situation expecting a smaller paycheck line often find no change, and that is correct under the flat method.

Louisiana Has No Local or Parish Wage Tax

Unlike Ohio, Pennsylvania, or Alabama, Louisiana does not allow cities or parishes to levy an income or occupational tax on wages. New Orleans, Baton Rouge, Shreveport, Lafayette, and every other Louisiana jurisdiction collect no local wage or earnings tax.

That matters most for workers moving to Louisiana from a state with local wage taxes who expect a city line on the stub. In Louisiana that line simply does not exist. Louisiana does levy state and local sales taxes, and parishes collect property taxes, but neither touches a paycheck. The only income tax withheld from a Louisiana paycheck is the federal tax and the flat 3.09% state tax, plus FICA.

Employer Payroll Obligations in Louisiana

Louisiana employers carry the federal employer taxes plus State Unemployment Insurance through the Louisiana Workforce Commission (LWC). The federal side, covered in the employer payroll tax obligations guide, includes the matching 6.2% Social Security and 1.45% Medicare plus Federal Unemployment Tax (FUTA). On top of that, Louisiana adds the employer unemployment contribution. There is no employee unemployment contribution to withhold.

The Louisiana unemployment taxable wage base is $7,000 per employee for 2026, down from $7,700 in 2025 and now tied to the federal FUTA floor, the lowest wage base in the country. The employer unemployment tax stops once an employee's year-to-date wages pass $7,000. New employers are assigned a rate based on their industry classification, and experienced employers pay an experience-rated rate; these are employer costs and are never deducted from employee pay. Model the combined cost-to-hire with the employer payroll tax calculator.

Louisiana Has No Employee Unemployment Deduction

A handful of states, including Pennsylvania and New Jersey, take a small unemployment contribution directly from employee wages. Louisiana is not one of them. The entire cost of Louisiana unemployment insurance falls on employers through the Louisiana Workforce Commission, so there is no employee unemployment line on a Louisiana pay stub at all.

This matters most for workers who move to Louisiana from a state that does deduct employee unemployment and expect to see the same line. In Louisiana that line simply does not exist, and its absence is correct, not a payroll error. Louisiana also has no state-run disability insurance deduction and no paid-family-leave payroll deduction, so the mandatory deductions on a Louisiana stub are federal taxes and the flat state income tax.

Louisiana Supplemental Wage Withholding

Supplemental wages are payments outside regular salary: bonuses, commissions, overtime, sales awards, and back pay. Louisiana applies its flat method to them the same as to regular wages.

• Flat method: Louisiana withholds on supplemental wages at the same flat 3.09% rate used for regular wages, per the R-1306 formula.
• Aggregate method: add the supplemental wages to regular wages and run the combined amount through the standard L-4 formula.
• No local tax: there is no city or parish tax on supplemental wages, because Louisiana has none.
• Employee unemployment: none, on supplemental wages or regular wages.

Federal income tax withholding on supplemental wages is a separate calculation set by the IRS, and Social Security and Medicare still apply under their own rules. For the federal supplemental math, use the Bonus Tax Calculator.

Louisiana Filing and Payment Frequency

Louisiana employers report and remit withheld state income tax on a monthly, quarterly, or semi-monthly schedule based on the amount withheld, through the Louisiana Taxpayer Access Point (LaTAP), and reconcile annually on Form L-3 with the W-2 information. The Louisiana Department of Revenue's R-1306 booklet sets out the deposit schedule and the withholding formula. The federal deposit schedule is covered separately in the payroll tax deadlines guide.

Unemployment tax is reported and paid separately from income tax withholding, on a quarterly basis through the Louisiana Workforce Commission. New employees must be reported to the Louisiana new-hire directory.

How Take-Home Pay Works in Louisiana

The calculation sequence runs from gross pay down to net pay. Because Louisiana starts from federal income, the federal pre-tax items flow through to the state base.

1. Start with gross wages for the pay period.
2. Subtract federal pre-tax deductions (401(k), Section 125 health premiums) to find taxable wages.
3. Apply federal income tax withholding using the Form W-4 and IRS Publication 15-T.
4. For the Louisiana line, subtract the Form L-4 standard deduction, then apply the flat 3.09% rate.
5. Subtract Social Security (6.2%) and Medicare (1.45%) on FICA wages (gross less Section 125 medical). The remainder is net pay; there is no local tax and no employee unemployment line.

To see exact figures for a specific salary, L-4 code, and pay frequency, use the Louisiana paycheck calculator or the general take-home pay calculator for a full pre-tax benefits stack.

Louisiana Payroll Quick Facts (2026)

Frequently Asked Questions