Revenue and taxation; foreclosure lien; unpaid taxes; population cap; effective date.

HB 3847 prevents the sale of single-family homes for unpaid property taxes in Oklahoma counties with over 100,000 residents, specifically protecting elderly or disabled homeowners. It requires homeowners aged 65+ or classified as totally disabled (with medical proof), living in their home (not renting it), earning below federal poverty income guidelines, and owning property valued under $180,000 to qualify for an exemption. Homeowners must apply annually to the county treasurer with proof of eligibility, though taxes, interest, and penalties continue to accrue during the exemption. The bill applies only to large counties (per 2020 Census) and takes effect November 1, 2026.