Louisiana Payroll Tax: Withholding, Unemployment, and Penalties

Louisiana payroll taxes break into three obligations for employers: a flat 3% state income tax withheld from employee wages, state unemployment insurance paid on the first $7,000 of each worker’s annual earnings, and the standard federal payroll taxes. The Louisiana Department of Revenue administers withholding; the Louisiana Workforce Commission runs unemployment insurance. Workers’ compensation coverage is mandatory alongside these, and all withholding returns must now be filed electronically through LaTAP.

State Income Tax Withholding

Louisiana taxes individual income at a flat 3% as of January 1, 2025, replacing the graduated brackets that ran from 1.85% to 4.25% under the old system.¹ Every dollar of taxable wages is withheld at the same rate regardless of the employee’s earnings.

The withholding formula itself uses 3.09% rather than a flat 3%, because it builds in credits already written into the tax code. Before applying the rate, you subtract a standard deduction from the employee’s wages: $12,500 for single filers or married filing separately, and $25,000 for married filing jointly, qualifying surviving spouse, or head of household.² The Department of Revenue publishes both withholding tables and the computer formulas for calculating the exact amount per pay period.

Every employee should complete Form L-4, the Employee’s Withholding Certificate, so you know which filing status and standard deduction to apply.³ Without a signed L-4, you have no reliable basis for the calculation. Louisiana does not set a separate flat rate for supplemental wages like bonuses or commissions, so those payments run through the same formula as regular pay.

An employer who fails to withhold remains liable for the penalties and additions to tax even if the employee later pays the income tax directly. Willfully failing to furnish an employee’s withholding statement carries a separate $50 penalty per failure.⁴

Short-Term and Out-of-State Workers

If you send a non-resident employee into Louisiana for a brief project, no state withholding is required for 30 or fewer days of work in the calendar year. Once the employee crosses that threshold, you owe withholding on every day worked in Louisiana that year, including the first 30.⁵ Track the days carefully; the obligation applies retroactively the moment the limit is exceeded.

Louisiana has no reciprocal tax agreements with any neighboring state. If an employee lives in Texas, Arkansas, or Mississippi but works in Louisiana, you withhold Louisiana tax on those wages, and the employee claims any credit on their home-state return.

State Unemployment Insurance

Louisiana’s unemployment insurance tax is paid entirely by the employer. Nothing comes out of the employee’s paycheck for it. The Louisiana Workforce Commission administers the program under La. R.S. 23:1471.⁶ The 2026 taxable wage base is $7,000 per employee, so once a worker’s earnings reach that mark for the year, you stop owing state unemployment tax on their remaining wages.⁷

New employers do not receive a single default rate. The Workforce Commission assigns an initial rate based on the average for employers in the same industry classification, so a new construction firm starts higher than a new accounting office.⁸ After serving the required eligibility period, you move to an experience-based rate tied to your reserve-ratio balance compared to average taxable payroll over the previous three fiscal years. For 2026, experience-rated employers pay as little as 0.09% or as much as 6.20% depending on claims history.⁷

Federal Payroll Taxes

Federal payroll taxes apply identically everywhere, but they are the biggest piece of most Louisiana employers’ total payroll tax burden, so they belong in the full picture.

Social Security (OASDI): employer and employee each pay 6.2% of gross wages up to the Social Security wage base for the year. Earnings above the cap are not subject to additional Social Security tax for the rest of the year.
Medicare: employer and employee each pay 1.45% on all wages with no cap. Employees who earn more than $200,000 in a calendar year owe an additional 0.9% Medicare surtax on wages above that threshold, but the employer does not match the surtax.
Federal Unemployment (FUTA): the employer pays 6.0% on the first $7,000 of each employee’s annual wages. Paying your Louisiana state unemployment tax on time earns a credit of up to 5.4%, bringing the effective FUTA rate down to 0.6%.

Report and pay these through the IRS using Form 941 quarterly and Form 940 annually for FUTA. Federal deposit penalties escalate the longer you wait, which is why most payroll services automate the deposits.

Workers’ Compensation Coverage

Workers’ compensation is not a payroll tax, but it is a mandatory payroll-linked cost that catches many new employers off guard. Louisiana requires every employer to carry workers’ compensation insurance if it has even one employee, whether full-time, part-time, or seasonal.⁹ Premiums are calculated as a rate per $100 of payroll and vary by job classification; office roles cost far less to insure than roofers.

A few narrow exemptions exist:

A sole proprietor with no employees, leased workers, subcontractors, or unpaid volunteers is not required to carry coverage.
A one- or two-person corporation whose owners hold all stock and all officer positions, with no other employees of any kind, may be exempt.
A corporate officer who owns at least 10% of the company can opt out of coverage in writing to the insurer.
Certain occupations are carved out by statute, including employees of private residences, unincorporated farms, and crop-dusting crews.

Operating without required coverage leaves the business directly liable for injury costs, and Louisiana actively enforces compliance.⁹

Setting Up Your Payroll Tax Accounts

Before running your first payroll, you need accounts with the IRS, the Louisiana Department of Revenue, and the Louisiana Workforce Commission. Most employers follow this order.

Start with a Federal Employer Identification Number from the IRS. The nine-digit number is required for every state registration that follows, and you can apply online and receive it immediately.¹⁰

Next, set up a withholding tax account with the Louisiana Department of Revenue. You will need the FEIN, legal business name, physical address, and the date you first paid wages in the state. The Department assigns a state account number that appears on every withholding return.

Then register with the Louisiana Workforce Commission for an unemployment insurance account through the Commission’s online system. The Commission assigns your initial rate based on your industry classification at that point.

Filing and Paying

Starting January 1, 2026, all withholding tax returns must be filed electronically through the Louisiana Taxpayer Access Point (LaTAP). Paper filing is no longer an option, and employers who ignore the electronic mandate face penalties and interest.¹¹

Withholding (Forms L-1 and L-3)

File Form L-1, the Employer’s Quarterly Return of Louisiana Withholding Tax, each quarter. It reports the Louisiana income tax withheld each month during the quarter.¹² Payments are due on the last day of the month following the close of the quarter: April 30, July 31, October 31, and January 31.¹³

At year-end, file Form L-3 to reconcile the withholding reported on your quarterly returns against the amounts shown on employee W-2 statements.¹⁴

Unemployment Insurance

UI wage and tax reports are due quarterly, within 30 days after the end of each quarter, and are filed through the Workforce Commission’s online reporting portal rather than LaTAP. All employers have been required to file UI reports electronically since 2014.¹⁵

New Hire Reporting

Every Louisiana employer must report new and rehired employees to the Louisiana Department of Children and Family Services within 20 days of the hire date.¹⁶ The requirement feeds the state’s child support enforcement program. The penalty for not reporting is $25 per unreported hire.¹⁷ A small fine, but auditors check, and the report itself takes minutes.

Late Filing Penalties

The Department of Revenue and the Workforce Commission use similar penalty structures, administered separately.

A late-filed or late-paid withholding return triggers a 5% penalty on the tax owed. The penalty grows by another 5% for every 30 days the return stays outstanding, up to 25%.¹⁸ Interest accrues on top. Persistent non-compliance can trigger collection action against the business.

Late unemployment insurance reports carry a penalty of 5% of the amount due for the quarter, or $25, whichever is greater, for the first 30 days. Each additional 30-day period adds another 5% or $25. The total penalty caps at 25% of the amount due or $125, whichever is greater, with interest charged separately.¹⁵

Both agencies treat ongoing non-compliance more seriously than a single late filing. If you realize you have missed a deadline, filing right away limits the escalation rather than waiting for the agency to send a notice.

1
Louisiana Department of Revenue. What Are the Individual Income Tax Rates and Brackets?
2
Louisiana Department of Revenue. Louisiana Withholding Tables and Formulas
3
Louisiana Department of Revenue. Employee’s Withholding Certificate
4
Justia Law. Louisiana Revised Statutes 47-112 – Income Tax Withheld at Source
5
Louisiana State Legislature. Louisiana Code 47-112.2 – Mobile Workforce Employer Exemption From Withholding and Reporting Requirement
6
Louisiana Workforce Commission. Unemployment Compensation Law
7
Louisiana Workforce Commission. 2026 Unemployment Insurance Contribution Rate Table
8
Louisiana Workforce Commission. Unemployment Insurance Tax Rates
9
Louisiana Workforce Commission. Workers’ Compensation Coverage for Employers
10
Internal Revenue Service. Get an Employer Identification Number
11
Louisiana Department of Revenue. State Expands Electronic Filing and Payment Mandate for Business Taxes
12
Louisiana Department of Revenue. Form L-1 – Employer’s Quarterly Return of Louisiana Withholding Tax
13
Louisiana Department of Revenue. When Are My Payments Due?
14
Louisiana Department of Revenue. Instructions for Employer’s Annual Reconciliation of Louisiana Withholding Tax Form L-3
15
Louisiana Workforce Commission. Unemployment Insurance Wage and Tax Reporting Services
16
Louisiana Department of Children and Family Services. New Hire Registry
17
Louisiana Division of Administration. New Hire Reporting
18
Louisiana Department of Revenue. Penalties