Before you start

An SSN or ITIN
Form W-4 with your employer for federal withholding
Louisiana Form L-4 with your employer for state withholding
Your parish of residence — Louisiana has no local income tax, but sales and property tax are parish-level
The homestead exemption, if you buy — it must be claimed with the parish assessor

Step-by-step

1
Complete the federal W-4 and the Louisiana L-4 on day one
The L-4 sets Louisiana withholding. Because the state rate is now a flat 3% with a large standard deduction, withholding is simpler here than in the bracketed states — but a wrong exemption count still produces a bill in April.
Via employerWho: YouFirst week of employment
2
Determine your US tax residency
The substantial presence test counts weighted days across three years to decide whether the US taxes your worldwide income or only US-source income. Your visa category does not decide this.
OnlineWho: You
3
Check for an applicable tax treaty
The US has treaties with around 70 countries that can reduce or exempt tax on particular income. Louisiana starts from federal adjusted gross income, so a federal treaty position generally flows through to the state return — confirm rather than assuming.
OnlineWho: You
4
File federal and Louisiana returns; there is no municipal return
The tax year is the calendar year, due 15 April federally and in mid-May for Louisiana. There is no New Orleans or Orleans Parish income tax return to file — a genuine simplification against the Ohio and Michigan cities in this app.
OnlineWho: YouAnnually
5
Claim the homestead exemption the year you buy
Louisiana exempts the first $75,000 of a primary residence's fair market value from property tax. It is not automatic — you file with the Orleans Parish Assessor, and it is also what makes a property eligible under the city's residential short-term rental rules. Do it in the year you close.
In personWho: You
6
Budget sales tax at 10%, and check the district
New Orleans levies 5% parish sales tax on top of the 5% state rate. The French Quarter Economic Development District adds 0.245%, Magnolia Marketplace 1% and Riverwalk-Spanish Plaza 2%. Sticker prices here are quoted before tax, as everywhere in the US, so the shelf price is not the price.
OnlineWho: You
7
Treat the property insurance surcharges as part of the tax picture
Louisiana funds parts of its property insurance market through charges on policies: a $100 surcharge on residential property policies pays for the Fortify Homes grant programme, and Louisiana Citizens — the residual insurer — carries assessment powers. None of it appears on a tax return, and all of it comes out of the same budget.
OnlineWho: You
8
File an FBAR if foreign accounts exceed $10,000
Aggregate foreign account balances over $10,000 at any point in the year trigger a FinCEN filing, separate from your tax return and with its own penalties.
OnlineWho: You

Documents you’ll need

Form W-2 from each employer, issued by 31 January
Form 1099s for freelance, interest and investment income
Forms W-4 and Louisiana L-4 filed with your employer
Act of sale and homestead exemption filing, if you buy
Passport and travel history for the substantial presence day count
Foreign account statements for FBAR reporting

Things most newcomers don’t know

Louisiana replaced brackets with a flat 3% for 2025 onward, and it is a real cut for most earners.

Voters approved the constitutional amendment in 2024 and the graduated 1.85%–4.25% schedule was repealed. Paired with a standard deduction of $12,500 single and $25,000 joint, the effective rate on a normal salary here is now among the lowest of any state that taxes income at all. Any guide or calculator that still shows Louisiana brackets is out of date.

Source: Louisiana Department of Revenue — individual income tax

There is no city or parish income tax, which is rarer than it sounds.

Columbus, Detroit, Baltimore and Kansas City all levy an income tax of their own on top of the state's. Louisiana has none anywhere. That means one state return, no municipal filing, and no work-city-versus-residence-city arithmetic — a genuine and underrated simplification for anyone moving here from the Midwest.

Source: Louisiana Department of Revenue

The 10% sales tax is where the state takes it back.

New Orleans's combined rate is 5% state plus 5% parish, among the highest headline rates in the country, and three economic development districts add more. For a low earner who spends most of what they make, the sales tax is a bigger annual number than the flat 3% income tax. Model both, not one.

Source: City of New Orleans — sales tax rate

Your insurance premium is a de facto tax and it is where the money actually goes.

Louisiana funds market interventions through policy charges — a $100 residential property surcharge pays for Fortify Homes roof grants, and Louisiana Citizens, the residual market insurer, can assess policyholders. Comparing New Orleans's tax burden to another city without putting the insurance stack next to it gets the answer badly wrong.

Source: Louisiana Department of Insurance — Fortify Homes

Your visa does not determine your tax residency.

The substantial presence test — a weighted day count across three years — decides whether the US taxes your worldwide income. Someone on a temporary visa can be a US tax resident; someone on a long visa can fail the test. Do the count rather than assuming.

Source: IRS — substantial presence test

Common mistakes to avoid

Using a calculator that still shows Louisiana's repealed graduated brackets.
Comparing New Orleans to another city on income tax alone, ignoring a 10% sales tax and the insurance stack.
Assuming the homestead exemption is automatic on purchase. It must be filed with the assessor.
Missing the Louisiana filing deadline, which is in May rather than April.
Missing the FBAR because a home-country account did not feel 'foreign'.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.

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