The IRS has issued significant new guidance regarding Health Savings Accounts (“HSAs”). Some highlights include: (i) clarifying the rules concerning a permissible one-time rollover from an eligible individual’s IRA or Roth IRA to an HSA; (ii) providing guidance for determining an eligible individual’s maximum HSA contribution limit; (iii) permitting an employer to recoup its contributions to an employee’s account if it is later determined that the employee was never eligible to establish an HSA; (iv) permitting an employer to recoup amounts it contributes to an employee’s HSA in excess of the maximum annual contribution limit (however, mistaken contributions that do not exceed the maximum annual contribution limit may not be recovered by the employer); and (v) clarifying that an employer cannot recoup contributions to an HSA account made after an employee ceases to be eligible. Furthermore, if an employer does not recoup the contributions described in items (iii) or (iv) above by the end of the year, such contributions must be included as gross income and wages on the employee’s Form W-2.