Louisiana has the highest average combined state and local sales tax rate in the nation, at 10.11%, according to the Tax Foundation’s latest state-by-state roundup for 2026.
The ranking reflects Louisiana’s unusually high mix of state and local levies. The state rate is 5%, and local governments add an average of a little more than five points on top of that.
The 5% state rate traces back to a 2024 …