Louisiana uses a flat state income tax of 3.0% in 2026 — the same rate applies to every dollar of taxable income, which makes your paycheck easy to predict. On a $75,000 salary, a single filer pays about $2,250 in state tax and takes home roughly $59,343 a year (about 79.1% of gross) after federal, state, and FICA withholding.

Louisiana's 3.0% rate is below the 4.8% average among states that tax wage income. Because the rate is flat, a raise never pushes part of your income into a higher state bracket — every extra dollar is taxed at the same 3.0%, unlike the federal system where higher earnings hit progressively higher brackets.

Remember that FICA is separate from income tax and is not affected by your state. Every worker pays 6.2% for Social Security on the first $184,500 of wages (the 2026 wage base) plus 1.45% for Medicare on all wages. Pre-tax 401(k) and HSA contributions lower your federal and state income tax but do not reduce FICA — a detail that trips up a lot of first-time budgeters.

Louisiana enacted a sweeping reform that replaced its graduated brackets with a single flat rate and nearly tripled the standard deduction, effective 2025 — so many lower- and middle-income households now owe less despite the flat structure. The trade-off in the same package was a higher state sales tax, keeping Louisiana's combined state-and-local sales taxes among the very highest in the nation.