Louisiana Income Tax Calculator

How to Use This Louisiana Income Tax Calculator

This Louisiana income tax calculator estimates your annual state and federal tax liability for 2025 and 2026. Enter your gross wages, filing status, and any pre-tax deductions above. Louisiana applies a flat 3% rate to taxable income after subtracting the state standard deduction ($12,500 single / $25,000 MFJ for 2026) — one of the largest standard deductions of any state in the country.

For a per-paycheck view of withholding and take-home pay, use the Louisiana paycheck calculator. To compare Louisiana against other states, use the general income tax calculator.

Louisiana's 2025 Tax Reform — Flat Rate and Larger Deduction

Before 2025, Louisiana used a three-bracket progressive system:

• 2% on the first $12,500 of taxable income (single)
• 4% from $12,500 to $50,000
• 4.25% above $50,000

Act 12 of the 2024 Louisiana First Extraordinary Session replaced these brackets with a single flat 3% rate, while also raising the standard deduction from about $4,500 (single) to $12,500. The intent was to simplify the tax code and reduce the marginal rate on earnings above $12,500 while protecting lower-income households through the larger deduction.

For most earners, the 2025+ system is simpler and results in similar or lower total Louisiana tax than the prior progressive system.

Louisiana Standard Deduction — How It Lowers Your Effective Rate

The $12,500 single / $25,000 MFJ standard deduction is the defining feature of Louisiana's tax system. For every income level, it reduces Louisiana taxable income before the flat rate applies:

• $40,000 income (single): Taxable income = $27,500. LA tax = $825. Effective LA rate on gross income = 2.06%.
• $70,000 income (single): Taxable income = $57,500. LA tax = $1,725. Effective LA rate = 2.46%.
• $120,000 income (single): Taxable income = $107,500. LA tax = $3,225. Effective LA rate = 2.69%.
• $200,000 income (single): Taxable income = $187,500. LA tax = $5,625. Effective LA rate = 2.81%.

At very high incomes (above ~$500,000), the effective rate converges toward 3%. But for the vast majority of Louisiana workers, the effective state income tax rate is 2.0%–2.8%.

FICA Taxes — Social Security and Medicare

FICA taxes are federal and apply to every Louisiana paycheck:

• Social Security: 6.2% on wages up to $176,100 (2025) or $184,500 (2026). No further withholding once you hit the wage base.
• Medicare: 1.45% on all wages with no cap.
• Additional Medicare: 0.9% on wages above $200,000 (single) or $250,000 (married jointly) — employee only, no employer match.

Step-by-Step Example — $90,000 Louisiana Single Filer (2026)

1. Gross wages: $90,000
2. Federal standard deduction: −$16,100 → federal taxable income: $73,900
3. Federal income tax (10% + 12% + 22% brackets): ≈ $11,670
4. FICA: $90,000 × 7.65% = $6,885
5. Louisiana standard deduction: −$12,500 → LA taxable income: $77,500
6. Louisiana income tax: $77,500 × 3% = $2,325
7. Total taxes: $11,670 + $6,885 + $2,325 = $20,880
8. Annual net income: $90,000 − $20,880 = $69,120

How to Reduce Your Louisiana Annual Tax Liability

• Maximize traditional 401(k) contributions — the 2026 limit is $23,500 ($31,000 if 50+). At a combined 3% LA + 22% federal rate, every $1,000 contributed saves $250 in taxes.
• Contribute to an HSA — $4,300 (self-only) or $8,550 (family) in 2026. Reduces both federal and Louisiana taxable income; payroll contributions also avoid FICA.
• Dependent Care FSA — up to $5,000 pre-tax for childcare reduces both federal and Louisiana taxable wages by the contribution amount.
• Louisiana START Savings Program— contributions to Louisiana's 529 college savings plan (START) may be deductible from Louisiana taxable income, with match incentives for lower-income families.
• File Louisiana Form L-4 — update your Louisiana withholding exemption certificate whenever your filing status or deductions change.

Retirement Income and Louisiana Taxes

Louisiana provides generous retirement income exemptions that make it attractive for retirees and those planning retirement income:

• Social Security benefits— Louisiana fully exempts Social Security income from state income tax for all residents, regardless of income level or age. Unlike some states that only exempt Social Security below a certain AGI threshold, Louisiana's exemption is unconditional.
• Military retirement pay — Fully exempt from Louisiana state income tax for all residents. Military retirees of any rank and branch pay no Louisiana income tax on their retirement checks.
• Louisiana state and local government pensions (LASERS / LSERS)— Retirement income from the Louisiana State Employees' Retirement System (LASERS), the Louisiana School Employees' Retirement System (LSERS), the Teachers' Retirement System of Louisiana (TRSL), and other Louisiana public retirement systems is fully exempt from Louisiana state income tax. Teachers, state workers, and municipal employees in Louisiana's defined-benefit plans pay no Louisiana tax on their pension income.
• Private pension exclusion — Private pension income (from employer defined-benefit plans, not IRA or 401(k) distributions) receives a $6,000 annual exclusion per taxpayer from Louisiana taxable income. A single retiree with $20,000 in private pension income pays Louisiana tax on only $14,000 of it (minus the standard deduction). Married couples each receive the $6,000 exclusion separately (up to $12,000 combined).
• 401(k) and IRA distributions — These are not covered by the $6,000 private pension exclusion and are taxable as ordinary income in Louisiana after the $12,500 standard deduction (single). A Louisiana retiree drawing $50,000 from an IRA would have Louisiana taxable income of $37,500, owing $1,125 in state tax at the 3% rate — a relatively low burden.

Louisiana Tax Credits and Deductions

• Louisiana Earned Income Tax Credit (EITC) — Louisiana provides a state EITC equal to 5% of the federal Earned Income Tax Credit. The credit is being phased out under the 2024 tax reform act, and its future is subject to legislative change. For 2026, eligible low-income workers can still claim it. A family with three children earning $30,000 might receive a federal EITC of ~$7,000 and a Louisiana credit of approximately $350.
• Standard deduction— Louisiana's $12,500 (single) / $25,000 (MFJ) standard deduction is the primary deduction and one of the most generous in the country. There is no separate Louisiana personal exemption under the 2025+ system.
• Louisiana START Savings Program (529)— Contributions to Louisiana's START 529 college savings plan may be deductible from Louisiana taxable income. The deduction is income-dependent — higher-income families may receive a smaller percentage deduction. Lower-income families also receive matching contributions from the state.
• Federal itemized deductions excess — Louisiana allows a deduction for excess federal itemized deductions above the applicable federal standard deduction. If you itemize federally (mortgage interest, charitable giving, state and local taxes), and your itemized deductions significantly exceed the federal standard deduction, you may carry a portion of that excess into your Louisiana return.

Louisiana State Tax Return — Form IT-540 and Filing Deadline

Louisiana residents file their state income tax return on Form IT-540(Louisiana Resident Individual Income Tax Return). Louisiana's filing deadline is May 15 — 30 days after the federal April 15 deadline. This built-in 30-day extension is automatic; no extension request is required to take advantage of it. Tax owed, however, must still be paid by May 15 to avoid interest and penalties. For additional time beyond May 15, Louisiana allows a further six-month extension through November 15, but payment is still due by May 15.

Tax Disclaimer

This calculator provides estimates for informational purposes only. It is not tax advice. Louisiana tax rates, standard deduction amounts, and federal rules can change each year. Results reflect 2025 and 2026 tax-year parameters. Consult a qualified tax professional or CPA for guidance on your specific situation.