Louisiana's flat 3% income tax
Louisiana taxes income at a flat 3%, whatever the amount and filing status. The Louisiana standard deduction is $12,875 for single filers, $25,750 for married couples filing jointly and $25,750 for heads of household.
This is Louisiana's 2025 schedule, the latest the calculator has. It was checked on 2026-09-30 against Louisiana DOR Emergency Rule LAC 61:I.1501, 2026 withholding tables (standard deduction $12,875 single/MFS, $25,750 MFJ/HOH).
Louisiana and federal income tax by income
At the calculator's default $85,000, Louisiana takes $2,164 of a $12,034 total income tax bill, or 18%. Filing status matters too: a married couple filing jointly on $170,000 owes Louisiana $4,328 — exactly what two single filers earning $85,000 each would pay.
| Gross income | Louisiana tax | Louisiana rate | Federal tax | Combined effective rate |
|---|---|---|---|---|
| $30,000 | $514 | 1.71% | $1,420 | 6.45% |
| $50,000 | $1,114 | 2.23% | $3,820 | 9.87% |
| $65,000 | $1,564 | 2.41% | $5,620 | 11.05% |
| $85,000 (default) | $2,164 | 2.55% | $9,870 | 14.16% |
| $100,000 | $2,614 | 2.61% | $13,170 | 15.78% |
| $125,000 | $3,364 | 2.69% | $18,734 | 17.68% |
| $200,000 | $5,614 | 2.81% | $36,734 | 21.17% |
| $300,000 | $8,614 | 2.87% | $68,134 | 25.58% |
| $400,000 | $11,614 | 2.90% | $103,134 | 28.69% |
Marginal tax rate in Louisiana
The next dollar a single filer earns above $85,000 is taxed at 25%: 22% federal and 3% by Louisiana. Because Louisiana's rate is flat, its share of a raise stays 3% at any income above the standard deduction.