Health Savings Account Deduction In California
The Health Savings Account deduction allows individuals enrolled in a qualifying high-deductible health plan to deduct contributions made to an HSA from their federal taxable income. For 2025, contribution limits are set by the IRS based on whether coverage is self-only or family. Contributions reduce federal adjusted gross income regardless of whether the filer itemizes deductions.
California is one of the few states that does not conform to the federal HSA tax treatment. California residents cannot deduct HSA contributions on their state return, and investment earnings within an HSA are also subject to California income tax. This means California filers receive the federal deduction but must add back HSA contributions and any account earnings when calculating their California state taxable income.
Despite the state tax disadvantage, HSAs remain valuable for California residents because the federal deduction, tax-free growth at the federal level, and tax-free withdrawals for qualified medical expenses still provide meaningful savings. Californians with HSAs should keep detailed records of contributions, employer contributions, and qualified medical expenses to accurately complete both their federal and California state returns.