Unless otherwise provided, the amount of simple conventional interest on obligations bearing interest from date and secured in whole or in part, directly or indirectly, by a mortgage on immovable property, shall not exceed twelve percent per annum. The same must be fixed in writing. Testimonial proof of it is not admitted in any case.
La. R.S. 9:3503
Maximum rate of conventional interest on certain loans
Acts 1969, No. 28, §2
Official source: Louisiana State Legislature. Reproduced from public-domain Louisiana statutes; confirm against the official source for the current text. Not legal advice.