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Get your taxes done using TurboTax
An employer's contribution (including an employee's contributions through a cafeteria plan) to an employee's HSA is not subject to federal income tax withholding or social security, Medicare, or railroad retirement taxes (or FUTA tax) if it is reasonable to believe at the time of the payment that the contribution will be excludable from the employee's income. However, if it is not reasonable to believe at the time of payment that the contribution will be excludable from the employee's income, employer contributions are subject to federal income tax withholding, social security and Medicare taxes (or railroad retirement taxes, if applicable), and FUTA tax, and must be reported in boxes 1, 3, and 5 (use box 14 if railroad retirement taxes apply); and on Form 940, Employer's Annual Federal Unemployment (FUTA) Tax Return.
You must report all employer contributions (including an employee's contributions through a cafeteria plan) to an HSA in box 12 of Form W-2 with code W. Employer contributions to an HSA that are not excludable from the income of the employee must also be reported in boxes 1, 3, and 5. (Use box 14 if railroad retirement taxes apply.)
An employee's contributions to an HSA (unless made through a cafeteria plan) are includible in income as wages and are subject to federal income tax withholding and social security and Medicare taxes (or railroad retirement taxes, if applicable). Employee contributions are deductible, within limits, on the employee's Form 1040 or 1040-SR.
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