Finance Calculators
Louisiana Sales Tax Calculator
Work out the sales tax on a price in Louisiana. The state rate is 4.45%; local jurisdictions may add up to 7.00% more, so the highest combined rate that can be charged in Louisiana is 11.45%.
Calculator
Formula Used
Add Tax: Amount × (1 + Rate/100). Remove Tax: Amount ÷ (1 + Rate/100).
About This Calculator
What It Does
This page applies the state's own rate for Louisiana, 4.45%, and shows the local ceiling the Tax Foundation publishes for the state: local jurisdictions may add up to 7.00%, which puts the highest combined rate at 11.45%. Enter an amount, then add the tax to it or take the tax out of it — the state is already selected.
Worked Example
At the Louisiana state rate of 4.45%, a purchase of $100.00 carries $4.45 in tax and costs $104.45. If local taxes apply at the state's ceiling, the combined rate reaches 11.45% and the same purchase carries $11.45 in tax, for a total of $111.45.
Real-World Usage
Use this page to see what a purchase really costs in Louisiana before you pay, to price an item including the tax a buyer in Louisiana will pay, or to check how far local taxes can push the rate above the state's own 4.45%. Rates change — several states adjust theirs every year — so treat these figures as the 2026 reference.
Local Context
The state's own rate for Louisiana is 4.45%, and the state lets local jurisdictions add up to 7.00% on top of it, so the highest combined rate that can be charged in Louisiana is 11.45%. Local rates vary by city, county and district and can change during the year; some states also exempt categories such as groceries or clothing.
Sources and Methodology
State and local sales tax rates: Tax Foundation, "State and Local Sales Tax Rates, Midyear 2026", column "Max Local Rate" (rates as of 1 July 2026, tax year 2026). The rate this page applies comes from the same table the calculator's state list uses.
Last reviewed: May 2026.
Tax rates are for general reference only. Actual rates may vary by county, city, or product category. Always verify with your local tax authority.
Frequently Asked Questions
What is the sales tax rate in Louisiana?
The Louisiana state rate is 4.45%. Local jurisdictions may add up to 7.00% more, so the highest combined rate is 11.45%. Many addresses charge less than that ceiling.
How do I add sales tax to a price in Louisiana?
Multiply the price by one plus the rate: an item of $100.00 at the Louisiana state rate of 4.45% comes to $104.45, of which $4.45 is tax. Use the calculator above to switch between adding tax to a net price and taking tax out of a gross price.
Which rate should I use if I do not know the local rate in Louisiana?
Start from the state rate, 4.45%, and add the local rate that applies where the sale happens. If you do not know it, the state's maximum local addition is 7.00%, which sets the ceiling that can be charged in Louisiana at 11.45%.