Louisiana Income Tax Rate for 2026

Examples

Louisiana Income Tax Calculation Examples

The goal of these examples is to compare Single and Married Filing Jointly statuses at the same $80,000 annual income per person. The Single example uses $80,000 of household income, while the Married Filing Jointly example assumes each spouse earns $80,000, for a combined $160,000. The results match our All 50 States income tax calculator using $80,000 or $160,000 and the corresponding filing status.

To simplify the calculations, both examples assume full-year Louisiana residency, W-2 wages only, no dependents, and taxpayers under age 65 who are not blind or claimed as dependents. Louisiana starts with federal adjusted gross income and uses its own standard deduction. The federal standard deduction does not reduce Louisiana taxable income. These examples use the Louisiana standard deduction, with no other deductions, Louisiana additions or subtractions, or tax credits. See the All 50 States calculator for a full list of assumptions and sources.

Looking at the table above, we can see that the same 3% tax rate applies to both Single and Married Filing Jointly statuses. The Louisiana standard deduction doubles for Married Filing Jointly, matching the doubling of household income. Taxable income and estimated state income tax also double, leaving both examples with the same 2.52% effective tax rate. Before rounding, the joint tax equals the combined tax of two single filers who each earn $80,000. Filing jointly therefore produces no Louisiana marriage penalty in this simplified comparison. Next, we will review the step-by-step calculations for each filing status.

Step-by-Step Example 1: Single

For a single filer with $80,000 of household income, the 2026 Louisiana standard deduction is $12,875. With wages only and no other adjustments, subtracting this deduction leaves $67,125 of Louisiana taxable income.

• Taxable income: Subtract the Louisiana standard deduction from household income. $\mathrm{\$80,000}-\mathrm{\$12,875}=\mathrm{\$67,125}$
• Estimated Louisiana income tax: Multiply taxable income by the flat tax rate of 3%. $\mathrm{\$67,125}\times 0.03=\mathrm{\$2,013.75}$

Louisiana effective tax rate: $2,013.75 divided by $80,000 of household income equals 2.52%, rounded. The estimated state income tax rounds to $2,014 in the comparison table.

Louisiana marginal tax rate: 3%, the rate applied to each additional dollar of Louisiana taxable income in this example.

Step-by-Step Example 2: Married Filing Jointly

Now let's apply the same calculation to a married couple filing jointly. Each spouse earns $80,000 with a combined household income of $160,000. The 2026 Louisiana standard deduction for Married Filing Jointly is $25,750. Subtracting this deduction leaves $134,250 of Louisiana taxable income.

• Taxable income: Subtract the joint Louisiana standard deduction from household income. $\mathrm{\$160,000}-\mathrm{\$25,750}=\mathrm{\$134,250}$
• Estimated Louisiana income tax: Multiply taxable income by the same flat tax rate of 3%. $\mathrm{\$134,250}\times 0.03=\mathrm{\$4,027.50}$

Louisiana effective tax rate: $4,027.50 divided by $160,000 of household income equals 2.52%, rounded. The estimated state income tax rounds to $4,028 in the comparison table.

Louisiana marginal tax rate: 3%, unchanged from the Single example.

Takeaway

Louisiana Income Tax Takeaways

A flat tax rate applies to taxable income: Louisiana's 3% rate does not apply to the entire paycheck in these examples. The Louisiana standard deduction reduces the income subject to state tax. The federal standard deduction is not subtracted in the Louisiana calculation.

The joint tax equals the combined tax of two single filers: At $80,000 of annual income per person, the joint household has twice the income, standard deduction, and taxable income. Before rounding, the joint tax is exactly twice the Single tax. This simplified comparison shows no Louisiana marriage penalty.

Both examples produce the same effective tax rate: Estimated Louisiana income tax divided by household income produces a 2.52% effective rate for both filing statuses. Both also have a 3% marginal rate. Results can differ when other deductions, state adjustments, or credits apply.