Louisiana Sales Tax Calculator (State & Local Rates)

Every state sets its own sales tax policy, and Louisiana lands on 5.00% at the state level before any local add-ons are considered. Local jurisdictions (cities, counties, and in some cases special taxing districts) are free to add their own surcharges on top of that, and the statewide average of those add-ons is 5.13%, which brings the typical combined rate to 10.13%.

That 10.13% average combined rate ranks among the five highest of any state that levies a general sales tax. Where Louisiana falls in that range matters most to frequent purchasers: furniture, vehicles, and other big-ticket items are where a percentage point or two of difference actually shows up as real dollars. Because the local piece of that 10.13% average is set city by city and county by county, two addresses a few miles apart within Louisiana can still land on noticeably different final totals for the same purchase.

Louisiana has the highest average combined sales tax rate in the United States, and it gets there from a middling state rate. The state charges 5.00% while the average parish and municipal rate is 5.13%, so local government takes slightly more than the state does and the combined rate reaches 10.13%. A $1,000 purchase produces $101.30 of tax, split $50.00 state and $51.30 local. Louisiana is also unusual administratively: local sales taxes have historically been collected by parish-level collectors rather than a single state agency, so a multi-parish seller can face several separate filings.

Where state and local taxes share a base, the two rates are added and applied once:

The steps are:

1. Establish the taxable base. The calculator uses the pre-tax price exactly as entered.
2. No item-level exemption filtering. Louisiana's state and local exemption lists do not match each other, which is one of the state's persistent complications. The calculator applies the combined general rate to the whole entered amount.
3. Apply the state rate to the base. That gives the state share of the tax.
4. Apply the local surcharge. The 5.13% average spans parishes and municipalities whose rates differ widely; individual jurisdictions run above 6% on their own.
5. Combine into a total. State and local tax are added, then the combined tax is added to the purchase price for the final transaction amount.

For a $1,000 taxable purchase in Louisiana:

1. Starting purchase price. The buyer rings up a $1,000.00 taxable retail purchase in Louisiana, the baseline amount before any tax is applied.
2. State portion. Louisiana's statutory state sales tax rate of 5.00% applies to the full purchase amount: $1,000.00 × 5.00% = $50.00 owed to the state.
3. Local portion. Local municipal, county, and special-district surcharges add an average of 5.13% on top of that: $1,000.00 × 5.13% = $51.30 more.
4. Combined tax due. Summing the two pieces, $50.00 in state tax plus $51.30 in local surcharge comes to $101.30 in total sales tax owed on the transaction.
5. Total out-of-pocket cost. Adding that $101.30 in tax to the $1,000.00 purchase price brings the buyer's total out-of-pocket cost to $1,101.30.

This example uses Louisiana's statewide average local rate of 5.13%; actual combined rates vary by city and county, so a real receipt could show a combined rate above or below the 10.13% average used here.

Louisiana is the one state in this batch where the local share is larger than the state share, and the calculator's own output is the cleanest way to see it.

The composition, at the default $1,000 purchase. Total tax $101.30, of which $50.00 is state and $51.30 is local. Local government takes 50.6% of the sales tax on a Louisiana receipt. Untick the local box and the calculator returns $50.00 on the same purchase, which is less than every other state in this batch charges before local tax is added.

Scaled to something people actually buy. A $35,000 vehicle produces $3,545.50 of combined tax, split $1,750.00 state and $1,795.50 local, on a total out-the-door cost of $38,545.50. The local surcharge alone on that purchase exceeds the entire combined tax a $35,000 purchase attracts in Kentucky, which is $2,100.00.

There is no threshold in this calculation. Louisiana applies one combined rate to every dollar of the entered base. There is no bracket, no cap, no exempt first slice and no item classification anywhere in calculateStateSalesTax, which reads a state rate and an average local rate and multiplies. The state and local exemption lists in Louisiana genuinely differ from each other, and this calculator has neither of them: it applies the general rate to the whole amount you type.

Marginal cost of the next unit. Each additional $100 of taxable purchase costs $10.13 at the combined rate, of which $5.00 is state and $5.13 local. Each additional $1,000 costs $101.30. The sweep confirms this: it runs from $166.67 of purchase to $2,000.00, with combined tax from $16.88 to $202.60, in a straight line.

Right method against wrong method, priced. The error is running a receipt total through the calculator instead of the pre-tax price. The $1,000 purchase above rings up at $1,101.30. Enter $1,101.30 and the calculator returns $111.57 of tax, overstating the real $101.30 by $10.27 and reporting a total of $1,212.87 that no receipt will ever show. To go the other way, the number you want is the price whose total lands on your figure: $908.02 of pre-tax purchase produces exactly $1,000.00 out the door, with $91.98 of tax inside it. That is 9.20% of the gross, not 10.13%, and the gap between those two percentages is what makes the naive deduction wrong.

• Statutory exemptions on unprepared groceries, prescription medications, or manufacturing equipment.
• Special industry excise taxes (lodging hotel taxes, vehicle rental fees, alcohol/tobacco excise).
• Use tax compliance on out-of-state untaxed online purchases.
• B2B resale certificate exemptions or direct pay permit programs.

• Confusing State and Combined Rates: Quoting the state base rate without factoring in local city and county add-on taxes.
• Overlooking Consumer Use Tax: Failing to self-report and remit use tax on untaxed out-of-state purchases on your state income tax return.
• Missing Annual Sales Tax Holidays: Many states offer annual tax-free weekends for back-to-school items, severe weather supplies, or energy-efficient appliances.
• Failing to Collect Resale Certificates: Selling wholesale without collecting valid exemption certificates exposes sellers to full sales tax liability upon audit.

• Louisiana Department of Revenue: 2026 Sales and Use Tax Rate Schedules. revenue.louisiana.gov
• Streamlined Sales Tax Governing Board (SSTGB): State Taxability Matrix. streamlinedsalestax.org/for-businesses/taxability-matrix