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.

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.