Louisiana Payroll · Flat 3.09% State Tax · IRS Publication 15-T
Louisiana Paycheck Calculator 2025
Estimate your Louisiana take-home pay for hourly or salaried work. Louisiana withholds a flat 3.09% state income tax after the Form L-4 standard deduction, with no employee unemployment tax and no local or parish wage tax. Uses 2025 IRS Publication 15-T rates.
Pay Details
Check this on Form W-4 if you hold two jobs or your spouse also works. It switches to the higher federal Step 2 withholding schedule.
Pre-Tax Deductions (Optional)
Traditional elective deferral. Lowers federal and Louisiana tax.
Cafeteria-plan medical premiums. Lowers federal, Louisiana, and FICA wages.
Federal W-4 Adjustments (Optional)
Annual federal dependent credit total (e.g. $2,000 per child under 17)
Federal Step 4c additional withholding per paycheck
Louisiana Withholding (Form L-4)
Block A of Form L-4 sets your Louisiana standard deduction. The 2025 flat method uses only this code — dependents no longer change withholding.
Optional additional Louisiana amount requested on Form L-4.
Louisiana income tax is withheld at a flat 3.09% for 2025, applied after the Form L-4 standard deduction ($12,500 or $25,000). Louisiana has no employee-paid unemployment tax and no local or parish wage tax, so those lines never appear.
Enter your pay details and click Calculate to see your take-home pay breakdown.
Want the full Louisiana payroll picture, including the 2025 flat-tax reform, Form L-4 mechanics, employer unemployment tax, and filing frequencies? Read the Louisiana Payroll Taxes guide.
Louisiana Payroll Taxes Guide →Short Answer
This Louisiana paycheck calculator estimates net take-home pay after federal income tax withholding, Social Security (6.2%), Medicare (1.45%), and Louisiana income tax at a flat 3.09% withholding rate applied after the Form L-4 standard deduction. For a single filer earning $65,000 per year paid biweekly and claiming code 1 on Form L-4, gross pay is $2,500.00 per period and Louisiana net take-home is approximately $2,018.90. Louisiana has no employee unemployment contribution and no local or parish wage tax, so the only income taxes on your stub are federal and the flat 3.09% state line.
Key Takeaways
- Louisiana income tax became a flat 3% effective January 1, 2025 (Act 11 of the 2024 Third Extraordinary Session), replacing the old 1.85% / 3.50% / 4.25% graduated brackets. Payroll withholding uses a flat 3.09% rate.
- Louisiana subtracts a real standard deduction set by Block A of Form L-4 before applying the rate: $12,500 for code 1 (single or married filing separately) and $25,000 for code 2 (married filing jointly, qualifying surviving spouse, or head of household).
- Because of that deduction, the effective Louisiana rate is below 3.09% and lands near the 3% headline tax at most incomes.
- The 2025 reform removed the dependent and personal-exemption withholding allowances. Louisiana withholding now depends only on the Block A code, not on how many dependents you claim.
- No Form L-4 on file means code 0 — no deduction. A single worker at $65,000 over-withholds about $386 per year at code 0 versus code 1. Filing an L-4 fixes it.
- A traditional 401(k) deferral reduces Louisiana tax. Louisiana income tax starts from federal adjusted gross income, so a deferral already excluded from federal wages is excluded from Louisiana wages too. A $7,800 deferral saves about $241 of Louisiana tax.
- Louisiana has no employee-paid unemployment tax and no local or parish income tax. There is no New Orleans or Baton Rouge earnings tax, and unemployment insurance is funded entirely by employers.
- Bonuses and supplemental wages follow separate federal withholding rules (flat 22% or aggregate method) and the same flat 3.09% Louisiana rate. For supplemental pay use the Bonus Tax Calculator and see the Bonus Tax Withholding Guide.
2025 Louisiana Paycheck Tax Quick Reference
| Tax | Rate | Wage Base / Threshold | Notes |
|---|---|---|---|
| Federal Income Tax | 10%–37% | No cap | Graduated brackets. Based on W-4 filing status and Publication 15-T percentage method tables. |
| Social Security (OASDI) | 6.2% employee | $176,100 (2025) | Withholding stops at wage base. Employer matches 6.2%. |
| Medicare (HI) | 1.45% employee | No limit | Employer matches 1.45%. |
| Additional Medicare Tax | 0.9% | $200,000 single/HOH; $250,000 MFJ; $125,000 MFS | Employee only. Employer withholds once individual wages exceed $200,000. |
| Louisiana Income Tax | 3.09% flat withholding (2025) | No cap | Applied after the Form L-4 standard deduction. Flat 3% tax on the annual return (Act 11). |
| LA Standard Deduction | $12,500 / $25,000 | Reduces taxable wages | $12,500 code 1 (single/MFS); $25,000 code 2 (MFJ/QSS/HoH). |
| Dependent Allowance | None (withholding) | — | Removed by the 2025 flat method. Claimed on the annual return instead. |
| Louisiana Unemployment (employee) | None | — | Louisiana UI is employer-funded only. No employee deduction. |
| Local / Parish Wage Tax | None | — | Louisiana has no local income taxes anywhere in the state. |
How This Calculator Works
Hourly Mode: Gross Pay Per Period
Gross pay per period equals the hourly rate multiplied by hours worked per week, then scaled to the pay period. For biweekly pay: hourly rate × hours per week × 2. For weekly: hourly rate × hours per week. For semi-monthly and monthly: hourly rate × hours per week × (52 ÷ periods per year).
Salary Mode: Gross Pay Per Period
Gross pay per period equals annual salary divided by the number of pay periods per year. Weekly: ÷ 52. Biweekly: ÷ 26. Semi-monthly: ÷ 24. Monthly: ÷ 12.
Which Wages Louisiana Taxes
Louisiana income tax begins with your federal adjusted gross income, so the wages Louisiana withholds on are the same wages that are subject to federal income tax withholding. That has a clean, practical result on a paycheck:
- Federal taxable wages = gross − Section 125 medical − 401(k) elective deferral.
- Louisiana taxable wages = the same base as federal, then reduced by the Form L-4 standard deduction before the 3.09% rate is applied.
- FICA wages (Social Security and Medicare) = gross − Section 125 medical. The 401(k) deferral does not reduce FICA.
Because Louisiana starts from federal income, a traditional deferral lowers the state line as well as the federal line, which is why the calculator shows a small Louisiana tax saving whenever you enter a 401(k) amount.
Social Security Tax
Social Security is 6.2% of annualized FICA wages up to the $176,100 wage base for 2025. The per-period amount is the annualized Social Security tax divided by pay periods. This calculator does not track year-to-date cumulative wages, so for workers approaching the wage base, actual withholding will stop mid-year once the limit is reached.
Medicare Tax
Standard Medicare is 1.45% on all FICA wages. The calculator adds the 0.9% Additional Medicare Tax on annualized FICA wages above $200,000, matching the employer withholding rule in IRS Topic 560: withholding starts once wages exceed $200,000 in a calendar year regardless of filing status. Final liability on Form 8959 uses filing-status thresholds ($200,000 single/HOH, $250,000 MFJ, $125,000 MFS).
Federal Income Tax Withholding
The calculator follows IRS Publication 15-T Worksheet 1A (Percentage Method for Automated Payroll Systems) for 2025:
- Annualize the per-period gross pay (multiply by pay periods per year).
- Subtract annualized Section 125 medical premiums and 401(k) elective deferrals to get federal taxable wages.
- Add Step 4a other income; subtract Step 4b additional deductions.
- Subtract the line 1g allowance: $12,900 for married filing jointly or $8,600 otherwise. If the W-4 Step 2 box is checked, subtract $0 instead. The result is the Adjusted Annual Wage Amount.
- Apply the Annual Percentage Method table for the W-4 filing status - the STANDARD schedule, or the Step 2 Checkbox schedule when the Step 2 box is checked - then divide the tentative annual withholding by pay periods.
- Subtract Step 3 dependent credits divided by pay periods, then add Step 4c extra withholding.
Louisiana Income Tax
Louisiana follows the computer formula method in the Department of Revenue's R-1306 Withholding Tables and Formulas. The employer subtracts the annual standard deduction set by Block A of Form L-4, then multiplies the remainder by the 3.09% withholding rate. The official per-period formula is:
W = ( S − ( standard deduction ÷ N ) ) × 3.09%
where S is the salary for the pay period and N is the number of pay periods per year; any negative amount is treated as zero. This calculator applies the mathematically equivalent annual form, LA tax = 3.09% × ( annual wages − standard deduction ), then divides across pay periods. The standard deduction is $12,500 for code 1 (single or married filing separately) and $25,000 for code 2 (married filing jointly, qualifying surviving spouse, or head of household); code 0, or no L-4 on file, uses no deduction. Because a real deduction sits inside the formula, the effective Louisiana rate is below 3.09% and lands near the 3% flat tax on the return. Any extra Louisiana withholding you requested on Form L-4 is added on top.
The 2025 reform is important: before 2025 Louisiana used graduated tables with personal exemptions and per-dependent credits inside the withholding math. The flat method dropped both. Dependents still matter on the annual return, but they no longer change the amount withheld from each paycheck.
No Louisiana Employee Unemployment or Local Tax
Louisiana collects no employee unemployment contribution; the entire cost of Louisiana unemployment insurance falls on employers through the Louisiana Workforce Commission. Louisiana also has no local or parish income taxes anywhere in the state, so there is no New Orleans or Baton Rouge city line comparable to an Ohio municipal tax or the Philadelphia Wage Tax. That leaves a Louisiana paycheck with only two income-tax lines, federal and the flat 3.09% state tax, plus FICA.
Real-World Paycheck Scenarios
Scenario 1: Salaried Single Filer in New Orleans
Devin earns $65,000 per year at a New Orleans logistics firm, paid biweekly, filing single with a standard federal W-4 and claiming code 1 on Form L-4. He has no 401(k) deferral and no cafeteria-plan premiums. His biweekly gross is $65,000 ÷ 26 = $2,500.00.
Louisiana detail: Devin's annual wages of $65,000 are reduced by the $12,500 code-1 standard deduction to $52,500, times 3.09% = $1,622.25 annual, divided by 26 = $62.39 per period. His effective Louisiana rate is only about 2.50% of gross, below the 3.09% withholding rate, because the standard deduction shelters the first $12,500. This lands close to Louisiana's flat 3% tax on the annual return.
Scenario 2: The No-L-4 Trap (Code 0)
Same worker, same $65,000 salary, but Devin never turned in a Form L-4, so his employer withholds at code 0 with no standard deduction. Louisiana applies 3.09% to his full wage.
Code 0 applies 3.09% to the full $65,000 = $2,008.50 a year, or $77.25 per period, $14.86 more per check than code 1. Over a year that is $12,500 × 3.09% = $386.25 of extra Louisiana withholding, refunded only when Devin files his Louisiana return. Filing an accurate Form L-4 with code 1 puts that money in each paycheck instead.
Scenario 3: The 401(k) Deferral That Cuts Louisiana Tax
Renee earns $85,000 per year in Baton Rouge, paid biweekly, filing single with L-4 code 1. She defers $300 per period to a traditional 401(k) ($7,800 per year). Because Louisiana starts from federal income, the deferral lowers her Louisiana line as well as her federal line.
Renee's federal and Louisiana wages are both $77,200 (gross less the $7,800 deferral), while her FICA wages stay at $85,000 because a 401(k) deferral never reduces Social Security and Medicare. Her Louisiana tax of $76.89 comes from ($77,200 − $12,500) × 3.09% ÷ 26. If she stopped the deferral, her Louisiana tax would rise to $86.16, so the deferral saves $7,800 × 3.09% = $241.02 per year of Louisiana tax now, taxed later when she draws the retirement income; see the Pension and Annuity Income Tax Guide for how distributions are treated at the back end.
Practitioner Insight
The Louisiana surprise for 2025 is the reform itself. Act 11 collapsed the old three-bracket system into a flat 3% tax and rebuilt the withholding tables around a single 3.09% rate and a bigger standard deduction. A worker who compared a December 2024 stub to a February 2025 stub often saw the state line move and assumed payroll made an error, when the law changed underneath them. The full-year 2025 method is the flat one, and the calculator uses it.
The second recurring item is the dependent question. Under the old tables, adding a child changed the amount withheld from each check. The flat method removed the per-dependent withholding allowance entirely, so a client who had a baby and expected a smaller Louisiana line on the next paycheck sees no change. Dependents still cut the tax, but on the annual return, not in the withholding. We reset that expectation every time someone updates their family situation.
A third one worth flagging: the Form L-4 code is the lever now, and a missing L-4 quietly defaults to code 0. That strips the standard deduction and over-withholds a single worker by roughly $386 a year. When someone's Louisiana refund is unusually large, an unfiled or stale L-4 is the first thing we check.
When This Calculator Gives a Less Accurate Estimate
- Pre-2025 paychecks: Before January 1, 2025 Louisiana used graduated brackets (1.85% / 3.50% / 4.25%) with personal exemptions and dependent credits. This calculator applies the 2025 flat 3.09% method, so a 2024 stub will not match.
- No L-4 on file: With no Form L-4, the employer withholds at code 0 (no standard deduction), so real withholding is higher than a code-1 estimate. The controlling code is the one on file with your employer.
- Very low earners: Once the standard deduction exceeds annual wages, Louisiana withholding is zero. The calculator floors the state line at zero, which is correct.
- Roth 401(k) contributions: A Roth deferral is a post-tax deduction. It reduces neither federal nor Louisiana taxable wages. Do not enter it in the 401(k) field, which models traditional pre-tax deferrals only.
- Non-medical cafeteria benefits: The Section 125 field models qualified medical premiums. Dependent care FSA and other cafeteria elections follow their own federal rules, which then flow through to the Louisiana base differently.
- Multi-state and remote workers: Louisiana has no reciprocity agreements with other states, so a resident of another state working in Louisiana is generally subject to Louisiana withholding on Louisiana-source wages. This calculator assumes Louisiana resident withholding.
- Year-to-date tracking and variable hours: The calculator annualizes a single consistent pay period. Social Security stops mid-year at the wage base, overtime and seasonal hours vary, and bonuses use supplemental federal withholding rules.
Frequently Asked Questions
What is the Louisiana state income tax withholding rate for 2025?
Louisiana withholds at a flat 3.09% rate for 2025. Effective January 1, 2025, Act 11 of the 2024 Third Extraordinary Session replaced Louisiana's old graduated brackets (1.85%, 3.50%, 4.25%) with a single flat 3% individual income tax, and the Department of Revenue's withholding formula uses a 3.09% withholding rate applied after the Form L-4 standard deduction. Because a real standard deduction is subtracted first, the effective rate on a paycheck is below 3.09% and lands near the 3% headline tax.
How much is the Louisiana standard deduction in the withholding formula?
For 2025 withholding, Louisiana subtracts an annual standard deduction based on Block A of Form L-4: $12,500 if you claim code 1 (single or married filing separately) and $25,000 if you claim code 2 (married filing jointly, qualifying surviving spouse, or head of household). Claiming code 0, or having no L-4 on file, uses no deduction and withholds 3.09% of the full wage. The 2025 flat method no longer applies separate per-dependent or personal-exemption allowances the way the pre-2025 tables did.
Do 401(k) contributions reduce Louisiana state income tax?
Yes. Louisiana income tax starts from your federal adjusted gross income, and a traditional 401(k) or 403(b) elective deferral is already excluded from federal taxable wages, so it is excluded from Louisiana taxable wages too. A worker deferring $7,800 to a traditional 401(k) reduces Louisiana taxable wages by $7,800 and saves about $241 of Louisiana tax at the 3.09% rate. The deferral still does not reduce Social Security and Medicare wages, which are based on gross pay less only Section 125 medical premiums.
Does Louisiana have local city or parish income taxes on wages?
No. Louisiana has no local or parish income tax on wages anywhere in the state. New Orleans, Baton Rouge, Shreveport, and every other Louisiana jurisdiction collect no local wage or earnings tax, so there is no city line on a Louisiana pay stub comparable to the Ohio municipal income tax or the Philadelphia Wage Tax. The only income tax withheld from a Louisiana paycheck is the federal tax and the flat 3.09% Louisiana state tax.
What happens if I do not file a Louisiana Form L-4?
If your employer has no Form L-4 on file, Louisiana withholding defaults to code 0, which applies the flat 3.09% rate to your full wages with no standard deduction. That over-withholds compared with claiming code 1: for a single worker earning $65,000, code 0 withholds about $386 more per year than code 1. Filing an accurate L-4 fixes it, and the R-1306 wage-bracket instructions confirm Column 0 is the no-deduction column.
Do Louisiana employees pay state unemployment tax?
No. Louisiana unemployment insurance is funded entirely by employer contributions to the Louisiana Workforce Commission. Employees pay nothing toward Louisiana unemployment, so there is no employee unemployment line on a Louisiana paycheck. Employers pay State Unemployment Insurance on the first $7,000 of each worker's wages for 2026 (down from $7,700 in 2025), at an experience-rated or new-employer rate. Louisiana also has no state disability insurance or paid-family-leave payroll tax deducted from wages.
What is the Social Security wage base for 2025?
The Social Security wage base for 2025 is $176,100. Social Security tax at 6.2% applies to wages up to this amount, and withholding stops once cumulative wages for the year exceed it. Medicare has no wage base limit and continues at 1.45% on all wages. Employers withhold an additional 0.9% Medicare surtax on wages above $200,000 regardless of filing status; final liability thresholds are $250,000 for married filing jointly and $125,000 for married filing separately.
How does a Louisiana paycheck compare to other states?
At the same gross salary, a Louisiana worker takes home less than a worker in Texas or Florida, which levy no state income tax, because Louisiana adds the flat 3.09% state line. But Louisiana's 3% flat tax is among the lower state income taxes in the country, well below graduated high-tax states like California or New York, and its $12,500 standard deduction shelters the first slice of pay. Compare directly with the Texas, Alabama, Georgia, Tennessee, and Missouri calculators.
Why does my actual Louisiana paycheck differ from this estimate?
This calculator estimates standard federal withholding, FICA, and the flat 3.09% Louisiana tax after the Form L-4 standard deduction. Actual paychecks also reflect post-tax deductions such as Roth 401(k) contributions and garnishments, year-to-date cumulative Social Security tracking, employer-specific payroll adjustments, mid-year W-4 or L-4 changes, and any additional Louisiana withholding you requested on Form L-4. The calculator assumes consistent pay each period and does not track cumulative wages across the year.
What To Do Next
Start by confirming two Louisiana-specific numbers before you trust any paycheck estimate. First, pull your most recent pay stub and check whether the state line looks like 3.09% of your wages after the Form L-4 standard deduction, not 3.09% of gross with no deduction. If the number looks too high, the usual cause is a missing or stale Form L-4 defaulting you to code 0. Second, confirm your Block A code matches your situation: code 1 for single or married filing separately, code 2 for married filing jointly, qualifying surviving spouse, or head of household.
If the code is wrong, the fix is a new Form L-4 submitted to your employer. Remember that under the 2025 flat method, dependents no longer change your withholding, so do not expect a smaller paycheck line after adding one; the benefit shows up on your annual return instead.
For the full Louisiana employer picture, including the state unemployment wage base and filing frequencies, read the Louisiana Payroll Taxes guide. To understand how withholding connects to your year-end liability, see How Payroll Taxes Work and W-4 Withholding Explained. To decode every line on the stub itself, use How to Read a Pay Stub. If you also have self-employment income, the 1099 Tax Calculator estimates the federal side including self-employment tax.
Sources & Editorial Disclosure
- Louisiana Department of Revenue, R-1306 Withholding Tables and Formulas, effective on or after January 1, 2025 (computer formula method; 3.09% withholding rate; standard deduction $12,500 code 1 / $25,000 code 2; Column 0 = no deduction; official examples $14.20 and $112.43)
- Louisiana Department of Revenue, individual income tax (flat 3% rate under Act 11 of the 2024 Third Extraordinary Session, effective January 1, 2025)
- Louisiana Workforce Commission, State Unemployment Insurance (employer-funded; $7,000 wage base for 2026, $7,700 for 2025)
- IRS Publication 15-T (2025), Employer's Tax Guide to Federal Income Tax Withholding
- IRS Topic 751, Social Security and Medicare Withholding Rates
- IRS Topic 560, Additional Medicare Tax
- Social Security Administration, 2025 Wage Base ($176,100)
- Authored by Munib Ur Rehman · Reviewed by Nausheen Shahid, LMN Tax Inc. Not affiliated with the IRS or the State of Louisiana. For informational purposes only.