Quick answerLouisiana sells tax lien certificates for unpaid property taxes. Lien buyers can earn From Jan. 1, 2026: bid down from 1% per month (12% per year, simple/non-compounding) to a floor of 0.7% per month (8.4% per year), in 0.1% increments, plus a 5% penalty on redemption (R.S. 47:2154, as amended by Act 774 of 2024). Pre-2026 tax sales paid a fixed 1% per month plus 5% penalty. Redemption: 3 years from recordation of the tax lien certificate (terminology pre-2026: tax sale certificate). After expiration, the certificate holder must pursue the statutory judicial process to enforce/liquidate; pre-2026 law also provided 18 months for blighted/abandoned property under La. Const. Art. VII, §25 Sales: Tax collector must advertise the tax lien auction on or before May 1 of the year following the assessment year (R.S. 47:2154); actual dates vary by parish — historically typically spring, often May-June Governing law: Louisiana Constitution Art. VII, §25 (as amended by voters Dec. 7, 2024); Louisiana Revised Statutes 47:2121 et seq., esp. §§47:2153, 47:2154, 47:2241-2243; Acts 774 and 409 of 2024 and Act 411 of 2025, effective Jan. 1, 2026.