Beginning with the 2026 tax year, the OBBB also permanently restores the deduction for mortgage insurance premiums (previously available from 2018 through 2021) by treating such premiums as interest on acquisition indebtedness. As before, the deduction is phased out for taxpayers with AGI above $100,000 ($50,000 for MFS). The deduction is phased out completely if AGI is more than $109,000 ($54,500 for MFS).