Buying a Boat in Louisiana? Here's Every Cost the Dealership Doesn't Mention.

Buying a boat in Louisiana can turn into a longer bill than the dealership price suggests. Registration through the Louisiana Department of Wildlife and Fisheries lasts three years and is based on length—$36 for boats under 16 feet, up to $99 for those 40 feet or longer—but titling and paperwork can add separate fees. Sales tax is often the biggest surprise: 5% state tax on dealer/builder purchases, with local sales taxes stacking on top, and a statewide cap of $20,000 total state-and-local tax if paid within 90 days (as of July 2025). Private “isolated” sales can carry 0% state tax.