Louisiana Income Tax Calculator 2026
Louisiana taxes income at a single flat 3% rate for 2026 — estimate yours below.
Louisiana's flat 3% income tax, explained
Louisiana (LA) taxes income at a single flat 3% rate rather than graduated brackets, so — unlike the federal system — every dollar of Louisiana taxable income is taxed at the same rate. That makes the state calculation simple, but it is separate from federal income tax and from Louisiana sales tax.
What to know about Louisiana tax
- Louisiana adopted a single flat individual income-tax rate as part of a recent tax overhaul, replacing its old brackets.
- Louisiana has one of the highest combined state-plus-local sales-tax rates in the country despite a modest state base.
- Treatment of the federal-tax deduction changed under recent reforms — confirm current rules with the Louisiana Department of Revenue.
Frequently Asked Questions
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Calculate →Disclaimer
This calculator provides estimates for informational and educational purposes only. SmartTaxCalcs does not provide tax advice. Your actual tax liability may differ based on your specific situation, recent law changes, and circumstances not modeled here (e.g., AMT, NIIT, special credits). We strongly recommend consulting a qualified tax professional (CPA, Enrolled Agent, or tax attorney) before filing or making financial decisions.
Data source: IRS Revenue Procedure / state Departments of Revenue. Last data update: May 19, 2026.