You can use this website to estimate your organization's tax savings when you offer your employees a High Deductible Health Plan with a Health Savings Account (HSA). Enter the total amount of your employees' pre-tax HSA contributions, your FICA tax, Federal and State Unemployment Insurance tax, and Workers' Compensation Insurance rates to see your results. You can also use the national average State Unemployment Insurance tax rate or your state by choosing those options from the State Unemployment drop down.