Louisiana sales tax calculator
The Louisiana state sales tax rate is 5%. City, county and special-district taxes stack on top, so set the combined rate if you know it. Combined state and local rates here are among the highest in the country.
- Tax added
- 5.00
- Total for the quantity
- 105.00
- Price before tax, working backwards
- 102.14
- Tax inside a tax-inclusive price
- 5.11
- Tax as a share of the total
- 4.7619 %
- Multiply the net price by this
- 1.050 000
Show the working
- Price before tax = 100
- Sales tax rate = 5
- Or a price that already includes tax = 107.25
- Quantity = 1
- Tax added = 100 * 5 / 100 = 5
- Total with tax = 100 + 5 = 105
- Total for the quantity = 105 * 1 = 105
- Price before tax, working backwards = 107.25 / (1 + 5/100) = 102.143
- Tax inside a tax-inclusive price = 107.25 - 102.143 = 5.107 14
- Tax as a share of the total = 105 > 0 ? 5 / 105 * 100 : 0 = 4.7619
- Multiply the net price by this = 1 + 5/100 = 1.05
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- tax = price x rate
- total = price x (1 + rate)
- to remove tax: net = gross / (1 + rate), never gross x (1 - rate)
Removing a tax is division, not subtraction. Taking 7.25% off a tax-inclusive price undercharges you every time.
Rates change and local additions vary by address. Treat the prefilled rate as a starting point and check the current combined rate for the exact jurisdiction.
Combined state and local rates here are among the highest in the country.
Frequently asked
What is the sales tax rate in Louisiana?
The state base rate is 5%, before any city, county or district additions.
How do I work out the price before tax?
Divide the tax-inclusive price by 1 plus the rate. At 5% that means dividing by 1.0500.
Where the numbers come from
- State base rates as published by state revenue departments; local additions are not included.