Why is interest assessed?


Revised Statute 47:1601 provides for interest to be added to unpaid taxes. When a taxpayer fails to pay the tax by the due date, interest will be added to the amount of tax due computed from the tax due date until the tax is paid. The interest rate is set annually at three percent above the legal interest rate provided for by Revised Statute 9:3500(B)(1). The Commissioner of the Office of Financial Institutions sets the legal interest rate at three and one-quarter percent above the discount rate published in the Wall Street Journal on the first business day of October.

LDR announces the interest rate on tax liabilities each year in a Revenue Information Bulletin.

Filing Dates


News & Announcements

July 31, 2025

New penalties for Kratom in effect Aug. 1

Starting Aug. 1, 2025, severe new penalties are in effect for the possession of the herbal supplement known as Kratom. Kratom is sold often as an energy booster, pain reliever and mood lifter. Its potential harmful side effects include liver toxicity, seizures and death.

July 28, 2025

Millions in state tax refunds moving to Unclaimed Property if taxpayers don’t claim them

BATON ROUGE – Louisiana taxpayers have until Sept. 6, 2025, to claim millions of dollars in state tax refunds before they become unclaimed property.

June 16, 2025

Suspects arrested, products seized and businesses closed in multi-agency vape crackdown

BATON ROUGE – A multi-agency state and federal crackdown on unauthorized vape products in Louisiana resulted in ten arrests and more than $1 million worth of illegal vape pens, pods, juices and other products taken off the streets.


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